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Posts Tagged ‘Food and Drug Administration’

FDA Guidelines For Developmental and Reproductive Toxicology (DART) Studies for Small Molecules. Author-Writer: Stephen J. Williams, Ph.D.

This posting is a follow-up on the Report on the Fall Mid-Atlantic Society of Toxicology Meeting “Reproductive Toxicology of Biologics: Challenges and Considerations post and gives a brief synopsis of the current state of FDA regulatory guidelines with respect to DART studies on small molecule (non-biological based) therapeutics.    The following is adapted from the book Principles and Methods of Toxicology by Dr. A Wallace Hayes (1) and is an excellent reference on reproductive toxicology and testing methods.

Chemical insult occurs to the human reproductive system at a multitude of stages in development and the life cycle, leading to the extensive testing which must be performed to diligently the reproductive and development toxicity of a chemical/drug.  Abnormalities and toxic manifestations in the offspring may result from insult to the adult reproductive (either female or male) and neuroendocrine systems, as well as damage to the embryo resulting in embryolethality, fetus at any period during organogenesis, juvenile development or, in the case of certain antibody therapies, immune system development.  The latter, toxic insult to the developing immune system could possibly be manifested as either an immune defect in the newborn or, later in life, as tolerance to said therapy.  It is estimated that exposure to the pregnant woman, of either environmental contaminants or drug, is significant.  It is estimated that a mother may be taking an average of 8-9 different drug preparations, mostly over the counter preparations such as antacids, vitamin preparations, cathartics etc. with the maximal drug intake occurring between 24 and 36 weeks of gestation.

Toxic insult to the developing embryo is dependent on

  • Fetal development stage during drug/chemical exposure
  • Maternal/placental xenobiotic metabolism
  • Pharmacokinetic parameters affecting bioavailability and fetal/maternal drug binding

The following table shows the dependency of developmental stage to teratogenicity: adapted from J. Manson, H. Zenick, and R.D. Costlow from Principles and Methods of Toxicology.

Developmental Stage Major Susceptibility
Preimplantation Embryolethality
Organogenesis Births defects; embryolethality
Fetal Growth retardation, fetal death, functional deficits
Neonatal Growth retardation, nervous system alterations, immune and endocrine systems

It is not generally accepted that there is a dose dependency of teratogenesis however most teratogens have specific mechanisms of action and teratogenic effects occur at much lower doses than result in maternal toxicity.   However, the developmental toxicity may be manifested later in life, including as reproductive toxicity affecting adult fertility and familial generations.

FDA Guidelines for DART Studies on Non-Biologics (Small Molecule Therapeutics)

The basic design for DART studies incorporate the aforementioned principles of tetralogy:

  • developmental stage of fetal exposure
  • parental effects on reproduction and development
  • toxicity may be manifested over multiple generations including fertility rates

Therefore two designs are generally used for DART studies

  1. exposure across several generations
  2. exposure during one generation

FDA requires one control group and two treatment groups, and evaluation of at least two species.  However, most studies will use two rodent and one nonrodent species.

Multigenerational Design

Multigenerational DART studies are conducted for compounds likely to concentrate in the body following long-term exposure.  Examples of types of compounds include pesticides and food additives.

Figure 1.  General Design of a Multigenerational DART study.  Weanlings (30-30 days of age) from the parental generation are treated for a period up to 60 days. At 100-120 days of parental generation, animals are mated.  Fx = filialx .

Three Segment, Single Generation Tests

The single generation design is more suitable for DART studies on drugs, as most therapeutic would be taken over short periods (during pregnancy) and have relatively short half-lives in the body.  FDA guidelines separate these studies in three phases:

I.            Phase I: evaluation of fertility and general reproductive performance

II.            Phase II: assessment of teratogenicity and embryotoxicity

III.            Phase III: peri- and postnatal evaluations.

All figures are adapted from Principles and Methods of Toxicology.(1)

FDA guidelines Guidance for Industry Reproductive and Developmental Toxicities —Integrating Study Results to Assess Concerns can be found at: http://www.fda.gov/downloads/Drugs/GuidanceComplianceRegulatoryInformation/Guidances/ucm079240.pdf

FDA Guideline for reproductive toxicity testing for small molecule therapeutics can be found at:

http://www.fda.gov/downloads/Drugs/GuidanceComplianceRegulatoryInformation/Guidances/ucm074950.pdf

1.            Hayes, A. W. (1986) Principles and Methods of Toxicology, Raven Press, New York

Other research papers on Pharmaceutical Intelligence and Reproductive Biology, Bio Insrumentation, Endocrinology Genetics were published on this Scientific Web site as follows

Non-small Cell Lung Cancer drugs – where does the Future lie?

Reboot evidence-based medicine and reconsider the randomized, placebo-controlled clinical trial

Every sperm is sacred: Sequencing DNA from individual cells vs “humans as a whole.”

Leptin and Puberty

Gene Trap Mutagenesis in Reproductive Research

Genes involved in Male Fertility and Sperm-egg Binding

Hope for Male Contraception: A small molecule that inhibits a protein important for chromatin organization can cause reversible sterility in male mice

Pregnancy with a Leptin-Receptor Mutation

The contribution of comparative genomic hybridization in reproductive medicine

Sperm collide and crawl the walls in chaotic journey to the ovum

Impact of evolutionary selection on functional regions: The imprint of evolutionary selection on ENCODE regulatory elements is manifested between species and within human populations

Biosimilars: CMC Issues and Regulatory Requirements

Biosimilars: Intellectual Property Creation and Protection by Pioneer and by Biosimilar Manufacturers

Assisted Reproductive Technology Cycles and Cumulative Birth Rates

Innovations in Bio instrumentation in Reproductive Clinical and Male Fertility Labs in the US

Increased risks of obesity and cancer, Decreased risk of type 2 diabetes: The role of Tumor-suppressor phosphatase and tensin homologue (PTEN)

Guidelines for the welfare and use of animals in cancer research

Every sperm is sacred: Sequencing DNA from individual cells vs “humans as a whole.”

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What could transform an underdog into a winner?

Author and Curator: Dror Nir, PhD

Many feedbacks to my last post reflected radiologists’ perception of ultrasound as a low-tech, unreliable imaging device.

Ultrasounds most manifested limitation by radiologists is that its performance is too-much user-dependent. This opinion finds support in numerous clinical studies concluding that ultrasound-based assessment of a cancer patient varies with the operator.

How come that an imaging technology that is not only  low-cost, simple to operate and risk-free to the patient, but has also gained a leading position in certain domain, like obstetrics,  is perceived as the underdog when it comes  to cancer assessment? Could it be because of its positioning as a “multi-purpose” system, which requires only very basic training?

If indeed this is the case, it doesn’t require “rocket-science” to turn it around. It only needs designing dedicated ultrasound machines who offer a comprehensive solution to one specific clinical need. Using such machines will require highly skilled operators who will enjoy a superior workflow, reporting tools and proven clinical guidelines.

The unsatisfactory reality of mammography-based breast cancer screening, as evident by epidemiology data and expert-panels’ reports, opens the opportunity to transform ultrasound into a winner in the niche-market of breast cancer screening and diagnosis. It’s a significant market that justifies the investment in ultrasound systems dedicated to detection and characterisation of breast cancer lesions.

No doubt, that the ability to provide accurate and standardized interpretation of such ultrasound systems’ scans is a pre-requisite. Ultrasound-based tissue characterisation is a must for any application aiming at standardized image interpretation. A sample out-of present ultrasound-based technologies aiming at providing some level of tissue-characterisation are listed below. Recent clinical studies show promising results using these technologies. It is worth watching carefully to see if any of those could be part of a future ultrasound-based solution to breast cancer screening.

Solid Breast Lesions: Clinical Experience with US-guided Diffuse Optical Tomography Combined with Conventional US

Results: Of the 136 biopsied lesions, 54 were carcinomas and 82 were benign. The average total hemoglobin concentration in the malignant group was 223.3 μmol/L ± 55.8 (standard deviation), and the average hemoglobin concentration in the benign group was 122.5 μmol/L ± 80.6 (P = .005). When the maximum hemoglobin concentration of 137.8 μmol/L was used as the threshold value, the sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of DOT with US localization were 96.3%, 65.9%, 65.0%, 96.4%, and 76.5%, respectively. The sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of conventional US were 96.3%, 92.6%, 89.7%, 97.4%, and 93.4%, respectively. The sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of conventional US combined with DOT were 100%, 93.9%, 91.5%, 100%, and 96.3%, respectively.

Conclusion: US-guided DOT combined with conventional US improves accuracy compared with DOT alone.

Breast Lesions: Quantitative Elastography with Supersonic Shear Imaging—Preliminary Results

 

 

Results: All breast lesions were detected at Supersonic Shear Imaging. Malignant lesions exhibited a mean elasticity value of 146.6 kPa ± 40.05 (standard deviation), whereas benign ones had an elasticity value of 45.3 kPa ± 41.1 (P < .001). Complicated cysts were differentiated from solid lesions because they had elasticity values of 0 kPa (no signal was retrieved from liquid areas).

Conclusion: Supersonic Shear Imaging provides quantitative elasticity measurements, thus adding complementary information that potentially could help in breast lesion characterization with B-mode US.

 Distinguishing Benign from Malignant Masses at Breast US: Combined US Elastography and Color Doppler US—Influence on Radiologist Accuracy

Results: The Az of B-mode US, US elastography, and Doppler US (average, 0.844; range, 0.797–0.876) was greater than that of B-mode US alone (average, 0.771; range, 0.738–0.798) for all readers (P = .001 for readers 1, 2, and 3; P < .001 for reader 4; P = .002 for reader 5). When both elastography and Doppler scores were negative, leading to strict downgrading, the specificity increased for all readers from an average of 25.3% (75.4 of 298; range, 6.4%–40.9%) to 34.0% (101.2 of 298; range, 26.5%–48.7%) (P < .001 for readers 1, 2, 4, and 5; P = .016 for reader 3) without a significant change in sensitivity.

Conclusion: Combined use of US elastography and color Doppler US increases both the accuracy in distinguishing benign from malignant masses and the specificity in decision-making for biopsy recommendation at B-mode US.

Evaluation of breast lesions by contrast enhanced ultrasound: Qualitative and quantitative analysis

A 57-year-old woman with a no-palpable lesion in the outer upper quadrant of left breast. (a) Gray scale image show an indistinct, hypo-echoic lesion. (b) Contrast enhanced image obtained 35 s after contrast agent injection showing a homogeneously and hyper-enhanced lesion. (c) Micro flow image obtained 38 s after contrast agent injection showing the enhanced mass with several radial vessels (arrow). (d) The time-intensity curve analysis show the peak intensity is 145.69 (intensity/1000), time to peak is 15.08 s, ascending slope is 8.98, descending slope is 1.03, the area under the curve is 7783.34. Pathologic analyses show this is an invasive ductal carcinoma.

 

Results: Histopathologic analysis of the 91 lesions revealed 44 benign and 47 malignant. For qualitative analysis, benign and malignant lesions differ significantly in enhancement patterns (p < 0.05). Malignant lesions more often showed heterogeneous and centripetal enhancement, whereas benign lesions mainly showed homogeneous and centrifugal enhancement. The detectable rate of peripheral radial or penetrating vessels was significantly higher in malignant lesions than in benign ones (p < 0.001). For quantitative analysis, malignant lesions showed significantly higher (p = 0.031) and faster enhancement (p = 0.025) than benign ones, and its time to peak was significantly shorter (p = 0.002). The areas under the ROC curve for qualitative, quantitative and combined analysis were 0.910 (Az1), 0.768 (Az2) and 0.926(Az3) respectively. The values of Az1 and Az3 were significantly higher than that for Az2 (p = 0.024 and p = 0.008, respectively). But there was no significant difference between the values of Az1 and Az3 (p = 0.625).

Conclusions: The diagnostic performance of qualitative and combined analysis was significantly higher than that for quantitative analysis. Although quantitative analysis has the potential to differentiate benign from malignant lesions, it has not yet improved the final diagnostic accuracy.

 Breast HistoScanning: the development of a novel technique to improve tissue characterization during breast ultrasound

Results: In 17 normal testing volumes, 3% of isolated voxels were classified as abnormal. In 15 abnormal testing volumes, the subclassifiers differentiated between malignant and benign tissue. BHS in benign tissue showed <1% abnormal voxels in cyst, hamartoma, papilloma and benign fibrosis. The fibroadenomas differed showing <5% and <24% abnormal voxels. Abnormal voxels in cancers increased with the volume of cancer at pathology.

Conclusions: HistoScanning reliably discriminated normal from abnormal tissue and could distinguish between benign and malignant lesions.

Written by: Dror Nir, PhD

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Report on the Fall Mid-Atlantic Society of Toxicology Meeting “Reproductive Toxicology of Biologics: Challenges and Considerations.  Author, Reporter: Stephen J. Williams, Ph.D.

The fall 2012 Meeting of the Mid-Atlantic Society of Toxicology (MASOT) focused on the challenges and solutions in developing proper Development and Reproductive Toxicology (DART) studies with regards to the newer classes of bio-therapeutics such as vaccines, antibody-based therapies, and viral-based therapies.  The full meeting and MASOT links can be found at http://www.masot.org.   The overall synopsis of the meeting talks agreed, that although the general aim and design of DART studies for biological are very similar to DART studies for small molecule therapeutics, it is more necessary to take into consideration the pharmacodynamics, pharmacokinetic differences between biologics and small molecules.   In addition it is imperative to use pharmacologically-relevant species, such as non-rodent (guinea pig and non-human primate). The meeting was highlighted by the keynote speaker, Dr. A. Wallace Hayes, renowned board-certified toxicologist, committee and expert panel member for National Academy of Sciences, NIEHS, EPA and Department of Defense, and editor of well-known textbooks including Principles and Methods of Toxicology.  Dr. Hayes discussed a timeline of milestones in the field of toxicology.

The following are the meeting talk abstracts as well as notes for each presenter.

What’s So Different About DART Assessment of Biologics? Christopher Bowman Ph.D., DABT (Pfizer, Inc.)

Abstract:  The aim of developmental and reproductive toxicity (DART) safety assessment of a biologic is no different from that of a small molecule. Both cases consist of evaluating the potential for maternal toxicity, pre- and postnatal development toxicity (including juvenile toxicity) and effects of fertility (reproduction).  The differences lie in the in the product attributes of a specific biologic, the pharmacological response, the potential for undesirable toxicities and how these product attributes influence and are influenced by the biology.  Thus the primary challenge for developing a DART strategy for a biologic are derived from the complexities of these biomolecules and how that dictates a case-by-case strategy for appropriately evaluating the potential for developmental and reproductive toxicity. Most protein biologics have very limited potential for off-target toxicities, but this is not necessarily the case for other modalities such as anti-sense oligonucleotides and antibody-drug-conjugates.  In these cases, off-target toxicities can be a major feature of the DART safety assessment.  The most noticeable difference in DART assessment of biologics is the need to conduct these studies in pharmacologically relevant species and how that can influence the overall nonclinical strategy (including DART).  This has led to increased use of non-human primates as a model system and led to optimizations of this model for this purpose and revisions to international guidelines.

Notes:   Dr. Bowman emphasized the need to understand the type of biological you are testing and to both devise DART studies based on this information, additional endpoint you may want, as well as carefully choosing the correct species most relevant to the biologic.  He highlighted general differences between small molecules versus a biologic with respect to their pharmacology.  These differences are summarized in the Table below:

  Small Molecule Biologic-based therapy
Species specificity Low High
Route of administration Usually oral Parental
ADME (PK, bio-distribution etc.) Wide distribution Low distribution

He noted that clinical trials for biologics rarely include reproductive toxicity so the preclinical DART study is of utmost importance.  He also emphasized that currently, the FDA requires two species for DART testing of small molecule therapies (usually one rodent and one non-rodent).  However this is not possible with many biologics as species is to be taken in consideration when designing a meaningful DART study.  Study designs can be like most DART studies but want to have a steady exposure during fetal organogenesis, use high doses (10 times the clinical dose) to achieve maximal pharmacology, confirm exposure to fetus and to F1 generation, and determine embryolethality.  Some biologics like interferon and insulin-growth factor receptor (IGFR) antagonists are fetal abortifactants. In fact Lucentis (Ranibizumab) and Macugen (Pegaptanib) were approved with no or little DART studies, however these drugs showed reproductive toxicity, resulting in warning concerning pregnancy on the label. Also important is the effect on the immune system and reproductive system of offspring, as well as the pharmacodynamics profile in the offspring.

Species Selection for Reproductive and Developmental Toxicity Testing of Biologics; Elise M. Lewis, Ph.D. (Charles River Preclinical Services)

Abstract:  Regulatory guidelines for developmental and reproductive toxicology studies require selection of “relevant” animal models as determined by kinetic, pharmacological, and preceding toxicological data.  Rats, mice, and rabbits are the preferred animal models for these studies based on historical experience and well-established procedures and study protocols.  However, due to species specificity and immunogenicity issues, developmental and reproductive toxicology testing for biologics is limited to a pharmacologically relevant animal model as described in the ICH s6 guideline.

Notes:  Dr. Lewis notes that DART studies in guinea pigs and hamsters represent a cost effective alternative to large animal models as well as the benefit of shorter duration and ability to assess mating behavior.  She also notes that reproductive toxicology of vaccines should be done in an animal model that can elicit an immune-response to the vaccine, especially to determine any maternal-fetal interaction.  For example, a vaccine may be directed to a maternal protein which when suppressed, may negatively impact the developing fetus.  However it is important to remember that guinea pigs can spontaneously abort so it is good to have proper control arms of a substantial size in order to statistically determine the impact of those spontaneous abortions.

 

 

Placental Transfer of an Adnectin Protein During Organogenesis in Guinea Pigs Using a Radiolabeled Methodology; Lakshmi Sivaraman, Ph.D. (Bristol-Myers Squibb)

Abstract:  Knowledge regarding the placental transfer of large molecular weight therapeutics is important to support the enrollment of women of childbearing potential in clinical trials.  There is limited information in the scientific literature that reports the extent to which the conceptus is exposed to these large molecules during organogenesis.  Placental transfer of large therapeutics has been difficult to quantify, due to limited blood volumes that can be obtained from the embryo, as well as insufficient assay sensitivity.  Thus, it is possible that embryos are exposed to pharmacologically active concentrations after maternal drug exposure. We have adopted a radiolabeled approach to quantitate embryo-fetal exposure of a novel protein therapeutic platform (adnectins). Adnectins are fibronectin-based proteins containing domains engineered to bind to targets of therapeutic interests.

Notes: Adnectins molecular weight is typically less than monoclonal antibodies and while IgG is not transferred in great quantity past the placental barrier there have been studies in human indicating maternal-fetal transfer of monoclonal antibodies.  This is particularly important for two reasons:  the monoclonal interacts with a target important in development, or the fetal immune system could be augmented.  Their work will be published in Drug Metabolism and Disposition.  In general Dr. Siveraman engineered a radiolabel on adnectin and used different detection methods to quantify the fetal exposure to a single maternal dose.  Dr. Siverman was able to detect radiolabel in the fetus however it is not clear whether this is a significant amount.

Reproductive Toxicity Testing for Biological Products in Nonhuman Primates: Evolution and Current Perspectives: Gary J. Chellman, Ph.D., DABT (Charles River Preclinical Services)

Notes:  Dr. Chellman gave a review of the current trends being driven by regulatory agencies with regard to nonhuman primate DART studies of biopharmaceuticals.  He noted that an advantage using nonhuman primates were the close physiologic resemblance to humans and because a large animal could monitor pregnancy over time using ultrasound technology.  In general, Dr. Chellman spoke about new study designs which not only reduce the number of animals required but also significantly reduce costs.  For example, a DART study which cost upward of $750,000 now can be done for as little as $350,000.  Dr. Kary Thompson of Bristol Myers Squibb then gave a talk about use of these new enhanced designs to determine reproductive toxicity issues with ipilimumab (Yervoy).

Other research papers on Pharmaceutical Intelligence and Reproductive Biology, Bio Insrumentation, Endocrinology Genetics were published on this Scientific Web site as follows

Non-small Cell Lung Cancer drugs – where does the Future lie?

Reboot evidence-based medicine and reconsider the randomized, placebo-controlled clinical trial

Every sperm is sacred: Sequencing DNA from individual cells vs “humans as a whole.”

Leptin and Puberty

Gene Trap Mutagenesis in Reproductive Research

Genes involved in Male Fertility and Sperm-egg Binding

Hope for Male Contraception: A small molecule that inhibits a protein important for chromatin organization can cause reversible sterility in male mice

Pregnancy with a Leptin-Receptor Mutation

The contribution of comparative genomic hybridization in reproductive medicine

Sperm collide and crawl the walls in chaotic journey to the ovum

Impact of evolutionary selection on functional regions: The imprint of evolutionary selection on ENCODE regulatory elements is manifested between species and within human populations

Biosimilars: CMC Issues and Regulatory Requirements

Biosimilars: Intellectual Property Creation and Protection by Pioneer and by Biosimilar Manufacturers

Assisted Reproductive Technology Cycles and Cumulative Birth Rates

Innovations in Bio instrumentation in Reproductive Clinical and Male Fertility Labs in the US

Increased risks of obesity and cancer, Decreased risk of type 2 diabetes: The role of Tumor-suppressor phosphatase and tensin homologue (PTEN)

Guidelines for the welfare and use of animals in cancer research

Every sperm is sacred: Sequencing DNA from individual cells vs “humans as a whole.”

 

 

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Xarelto (Rivaroxaban): Anticoagulant Therapy gains FDA New Indications and Risk Reduction for: (DVT) and (PE), while in use for Atrial fibrillation increase in Gastrointestinal (GI) Bleeding Reported

Reporter: Aviva Lev-Ari, PhD, RN

 

UPDATED on 8/17/2018

NOAC’s Brain Bleed Risk Outside Afib May Be Dose-Dependent

Higher risk seen only with higher rivaroxaban doses in meta-analysis

by Ashley Lyles, MedPage Today Intern 

The findings indicate the following risk of intracranial hemorrhage versus aspirin:

  • 10 mg of rivaroxaban taken once per day or 5 mg taken two times a day (three trials, OR 1.43, 95% CI 0.93-2.21)
  • 5 mg of apixaban twice daily (one trial, OR 0.84, 95% CI 0.38-1.88)

The study also showed that 15 mg to 20 mg of rivaroxaban each day was linked with an increased risk of fatal bleeding (two trials, OR 2.37, 95% CI 1.30-4.29). On the other hand, 10 mg of rivaroxaban each day or 5 mg taken twice a day (three trials, OR 1.47, 95% CI 0.72-2.97) and 5 mg of apixaban taken twice per day (one trial, OR 0.66, 95 % CI 0.19-2.35) were not linked with an increased risk.

Increased risk of major bleeding compared with aspirin was seen with 15 mg to 20 mg dose of rivaroxaban each day (two trials, OR 2.64, 95% CI 1.68-4.16) and a 10 mg dose of rivaroxaban once a day or 5 mg twice per day (three trials, OR 1.56, 95% CI 1.31-1.85).

Primary Source

JAMA Neurology

Source Reference: Huang W, et al “Association of intracranial hemorrhage risk with non–vitamin k antagonist oral anticoagulant use vs aspirin use a systematic review and meta-analysis” JAMA Neurology 2018; DOI: 10.1001.

SOURCE

https://www.medpagetoday.com/cardiology/strokes/74552?xid=nl_mpt_cardiodaily_2018-08-17&eun=g99985d0r&utm_source=Sailthru&utm_medium=email&utm_campaign=AHAWeekly_081718&utm_term=AHA%20Cardiovascular%20Daily%20-%20Active%20Users%20180%20days

 

UPDATED on 10/9/2017

Xarelto Flop in Stroke Prevention Trial; Syncope Device; Workout by Watching Hockey, Theater?

Recent developments of interest in cardiovascular medicine

  • by Crystal Phend,Senior Associate Editor, MedPage TodayOctober 09, 2017

https://www.medpagetoday.com/Cardiology/Prevention/68421

Rivaroxaban (Xarelto) flopped for preventing recurrent strokes and increased bleeding compared with aspirin in top-line results from the phase III NAVIGATE ESUS trial, Bayer and Janssen announced. (Genetic Engineering and Biotechnology News)

Xarelto (Rivaroxaban): Anticoagulant Therapy gains FDA New Indications and Risk Reduction for: (DVT) and (PE), while in use for Atrial fibrillation, increase in Gastrointestinal (GI) Bleeding Reported compared with Coumadin

Rivaroxaban Gains FDA Indications For The Treatment And Prevention Of DVT And PE

The FDA today expanded the indication for rivaroxaban (Xarelto, Johnson & Johnson) to include the treatment of deep vein thrombosis (DVT) and pulmonary embolism (PE) and to reduce the risk of recurrent DVT and PE.

The oral anticoagulant is already approved to reduce the post-surgical risk of DVT and PE  after hip and knee replacement surgery and to reduce the risk of stroke in people with atrial fibrillation. The new indication was granted under the FDA’s priority review program.

“Xarelto is the first oral anti-clotting drug approved to treat and reduce the recurrence of blood clots since the approval of warfarin nearly 60 years ago,” said Richard Pazdur,  director of the FDA’s Office of Hematology and Oncology Products, in an FDA press release.

Here is the FDA press release:

FDA expands use of Xarelto to treat, reduce recurrence of blood clots
The U.S. Food and Drug Administrationtoday expanded the approved use of Xarelto (rivaroxaban) to include treating deep vein thrombosis (DVT) or pulmonary embolism (PE), and to reduce the risk of recurrent DVT and PE following initial treatment.Blood clots occur when blood thickens and clumps together. DVT is a blood clot that forms in a vein deep in the body. Most deep vein blood clots occur in the lower leg or thigh. When a blood clot in a deep vein breaks off and travels to an artery in the lungs and blocks blood flow, it results in a potentially deadly condition called PE.Xarelto is already FDA-approved to reduce the risk of DVTs and PEs from occurring after knee or hip replacement surgery (July 2011), and to reduce the risk of stroke in people who have a type of abnormal heart rhythm called non-valvular atrial fibrillation (November 2011).

The FDA reviewed Xarelto’s new indication under the agency’s priority review program, which provides an expedited six-month review for drugs that offer major advances in treatment or that provide treatment when no adequate therapy exists.

“Xarelto is the first oral anti-clotting drug approved to treat and reduce the recurrence of blood clots since the approval of warfarin nearly 60 years ago,” said Richard Pazdur, M.D., director of the Office of Hematology and Oncology Products in the FDA’s Center for Drug Evaluation and Research.

Other drugs approved by FDA to treat or reduce the risk of blood clots include Lovenox (enoxaparin), generic versions of enoxaparin, Arixtra (fondaparinux), Fragmin (dalteparin), Coumadin (warfarin), and heparin.

The safety and effectiveness of Xarelto for the new indications were evaluated in three clinical studies. A total of 9,478 patients with DVT or PE were randomly assigned to receive Xarelto, a combination of enoxaparin and a vitamin K antagonist (VKA), or a placebo. The studies were designed to measure the number of patients who experienced recurrent symptoms of DVT, PE or death after receiving treatment.

Results showed Xarelto was as effective as the enoxaparin and VKA combination for treating DVT and PE. About 2.1 percent of patients treated with Xarelto compared with 1.8 percent to 3 percent of patients treated with the enoxaparin and VKA combination experienced a recurrent DVT or PE. Additionally, results from a third study showed extended Xarelto treatment reduced the risk of recurrent DVT and PE in patients. About 1.3 percent of patients treated with Xarelto compared with 7.1 percent of patients receiving placebo experienced a recurrent DVT or PE.

The major side effect observed with Xarelto is bleeding, similar to other anti-clotting drugs.

Xarelto is marketed by Raritan, N.J.-based Janssen Pharmaceuticals Inc.

For more information:

FDA: Office of Hematology and Oncology Products

FDA: Approved Drugs: Questions and Answers

The FDA, an agency within the U.S. Department of Health and Human Services, protects the public health by assuring the safety, effectiveness, and security of human and veterinary drugs, vaccines and other biological products for human use, and medical devices. The agency also is responsible for the safety and security of our nation’s food supply, cosmetics, dietary supplements, products that give off electronic radiation, and for regulating tobacco products.

 

SOURCE:

http://www.forbes.com/sites/larryhusten/2012/11/02/rivaroxaban-gains-fda-indications-for-the-treatment-and-prevention-of-dvt-and-pe/?goback=%2Egde_2069447_member_181862591

Cardiac Atrial Fibrillation

ATLANTA, Georgia — Patients with atrial fibrillation receiving anticoagulant therapy are more likely to experience gastrointestinal (GI) bleeding when treated with rivaroxaban than when treated with warfarin, according to a new analysis of data from ROCKET AF.

Christopher Nessel, MD, from research and development at Johnson & Johnson in Raritan, New Jersey, reported the findings here at CHEST 2012: American College of Chest Physicians Annual Meeting.

“Compared with warfarin, the risk of GI bleeding is increased with rivaroxaban, but the incidence of life-threatening or fatal GI bleeding is lower,” Dr. Nessel told Medscape Medical News. “A careful benefit/risk assessment is needed prior to prescribing rivaroxaban for high-risk patients,” he added.

The analysis examined the incidence and outcomes of GI hemorrhage in 14,264 patients with nonvalvular atrial fibrillation enrolled in ROCKET AF.

The patients were randomized to either rivaroxaban or dose-adjusted warfarin. All GI bleeding events were recorded during treatment and for 2 days after the last dose was administered. Severity of bleeding was defined by a corresponding drop in hemoglobin or transfusion of more than 2 units of red cells.

The composite principal safety end point for GI bleeding events (upper GI, lower GI, and rectal bleeding) occurred more frequently in the 394 patients receiving rivaroxaban than in the 290 receiving warfarin (3.61% vs 2.60% per year; hazard ratio [HR], 1.39; 95% confidence interval [CI], 1.19 to 1.61). Major bleeding was more frequent with rivaroxaban than with warfarin (2.00% vs 1.24% per year; HR, 1.61; 95% CI, 1.30 to 1.99), as was clinically relevant nonmajor bleeding (1.75% vs 1.39% per year; HR, 1.26; 95% CI, 1.20 to 1.55).

Patients who experienced major GI bleeding were more likely to have experienced GI bleeding in the past, to have mild anemia, to have a lower creatinine clearance, to be previous or current smokers, and to be older than patients who did not experience a GI bleeding during the trial (n = 13,552). They were also less likely to be female and to have previously experienced a stroke or transient ischemic attack.

The incidence of severe bleeding (transfusion of at least 4 units) was similar in the rivaroxaban and warfarin groups (49 vs 47). Six patients developed fatal bleeding: 1 in the rivaroxaban group and 5 in the warfarin group.

Data May Give Clinicians Pause When Considering Rivaroxaban

“The data presented extend the observations from the ROCKET AF clinical study,” Dr. Nessel said. “Specifically, the analyses identified characteristics of nonvalvular atrial fibrillation patients that may predispose them to the occurrence of GI hemorrhage. The data also indicated that the overall fatality rates for bleeds of this nature are very low.”

Independent commentator James Wisler, MD, from the division of cardiovascular disease at Duke University Medical Center in Durham, North Carolina, pointed out that this study underscores the importance of critically evaluating these newer anticoagulants when considering their use in a given patient.

“The decision regarding which anticoagulant to use for a given patient is complex, and risks and benefits need to be considered thoughtfully,” he told Medscape Medical News. He added that the results of this study might give some physicians pause about initiating a newer anticoagulant, such as rivaroxaban, in a given patient with atrial fibrillation and an unfavorable risk profile, such as those with a previous GI bleed.

“While the previously published results from ROCKET AF suggested that the risk profiles were similar between rivaroxaban and warfarin, these results demonstrate that there is indeed a subpopulation of patients who may be better served with warfarin than rivaroxaban,” he explained.

According to Dr. Wisler, both this analysis and the initial ROCKET AF study demonstrate that rivaroxaban is associated with fewer episodes of severe or fatal bleeding events, despite the increase in major and clinically relevant nonmajor bleeding observed in the specific subgroup of this study. “Currently, it is unclear why this discrepancy exists,” he added.

He recommends that clinicians take a careful patient history to assess bleeding risk factors when considering the initiation of a newer anticoagulant such as rivaroxaban.

“While perhaps more convenient and efficacious, certain patient populations, such as that evaluated in this study, may receive net harm from these newer agents,” he said.

SOURCE:

CHEST 2012: American College of Chest Physicians Annual Meeting. Presented October 22, 2012.

http://journal.publications.chestnet.org/issue.aspx?journalid=99&issueid=25283

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Larry H Bernstein, MD, FCAP, Reporter

Laboratory

NIH-Funded Tissue Chips would Predict Drug Safety
Published: Friday, August 31, 2012
Last Updated: Friday, August 31, 2012

Researchers from Cornell University will develop microphysiological modules to model the nervous, circulatory and gastrointestinal tract systems.
Cornell’s Michael Shuler has received National Institutes of Health (NIH) funding to make 3-D chips with living cells and tissues that model the structure and function of human organs and help predict drug safety.

Shuler, the James and Marsha McCormick Chair of the Department of Biomedical Engineering, and James Hickman of the University of Central Florida (UCF) jointly received one of 17 NIH grants for tissue chip projects.

Shuler and Hickman’s grant of approximately $9 million over five years includes subcontracts to UCF, RegenMed, GE, Sanford-Burnham and Walter Reed Army Institute. It will support their work in microphysiological systems with functional readouts for drug candidate analysis during preclinical testing.

The researchers also plan to build a 10-organ system designed to be low-cost yet highly functional to use in drug discovery, toxicity and preclinical studies.

With the funds, the NIH is supporting bio-engineered devices that will be functionally relevant and will accurately reflect the complexity of a particular tissue, including genomic diversity, disease complexity and pharmacological response.

The NIH tissue chip projects will be tested with compounds known to be safe or toxic in humans to help identify the most reliable drug safety signals — ultimately advancing research to help predict the safety of drugs in a faster, more cost-effective way.

The initiative marks the first interagency collaboration, with the Defense Advanced Research Projects Agency, launched by the NIH’s recently created National Center for Advancing Translational Sciences. The NIH plans to commit up to $70 million over five years to the program

NIH Funds Development of Tissue Chips to Help Predict Drug Safety
Published: Wednesday, July 25, 2012
Last Updated: Wednesday, July 25, 2012

DARPA and FDA to collaborate on therapeutic development initiative.

Seventeen National Institutes of Health grants are aimed at creating 3-D chips with living cells and tissues that accurately model the structure and function of human organs such as the lung, liver and heart.

Once developed, these tissue chips will be tested with compounds known to be safe or toxic in humans to help identify the most reliable drug safety signals – ultimately advancing research to help predict the safety of potential drugs in a faster, more cost-effective way.

The initiative marks the first interagency collaboration launched by the NIH’s recently created National Center for Advancing Translational Sciences (NCATS).

Tissue chips merge techniques from the computer industry with modern tissue engineering by combining miniature models of living organ tissues on a transparent microchip.

Ranging in size from a quarter to a house key, the chips are lined with living cells and contain features designed to replicate the complex biological functions of specific organs.

NIH’s newly funded Tissue Chip for Drug Screening initiative is the result of collaborations that focus the resources and ingenuity of the NIH, Defense Advanced Research Projects Agency (DARPA) and U.S. Food and Drug Administration.

NIH’s Common Fund and National Institute of Neurological Disorders and Stroke led the trans-NIH efforts to establish the program. The NIH plans to commit up to $70 million over five years for the program.

“Serious adverse effects and toxicity are major obstacles in the drug development process,” said Thomas R. Insel, M.D., NCATS acting director.

Insel continued, “With innovative tools and methodologies, such as those developed by the tissue chip program, we may be able to accelerate the process by which we identify compounds likely to be safe in humans, saving time and money, and ultimately increasing the quality and number of therapies available for patients.”

More than 30 percent of promising medications have failed in human clinical trials because they are determined to be toxic despite promising pre-clinical studies in animal models.

Tissue chips, which are a newer human cell-based approach, may enable scientists to predict more accurately how effective a therapeutic candidate would be in clinical studies.

 

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Reporter: Aviva Lev-Ari, PhD, RN

Pfizer Inc. (PFE) Will Buy NextWave Pharmaceuticals for Up to $680 Million

10/22/2012 8:03:33 AM

Pfizer Inc. | Jobs at Pfizer Inc.

NEW YORK–(BUSINESS WIRE)–Pfizer Inc. (NYSE: PFE) today announced its intention to acquire NextWave Pharmaceuticals, a privately held, specialty pharmaceutical company focused on the development and commercialization of unique products for the treatment of attention deficit/hyperactivity disorder (ADHD) and related central nervous system (CNS)disorders.

“NextWave has been focused on helping patients and families who struggle with the challenges of ADHD. We are excited to partner with Pfizer, one of the most respected pharmaceutical organizations in the world, to bring the unique benefits of Quillivant XR to those affected by this challenging condition”

NextWave is the developer of Quillivant XR™ (methylphenidate hydrochloride) for extended-release oral suspension, CII, the first once-daily liquid medication approved in the U.S. for the treatment of ADHD, and holds exclusive North American commercialization rights to Quillivant XR. Quillivant XR received approval from the U.S. Food and Drug Administration on September 27, 2012, and is expected to be available in pharmacies in the U.S. in January 2013.

Quillivant XR was developed in collaboration with Tris Pharma, NextWave’s technology and manufacturing partner. Quillivant XR is built on Tris’ OralXR+ platform.

Pfizer had previously entered into an option and merger agreement with NextWave during the second quarter 2012 and made an option payment of $20 million. Today, Pfizer is exercising its option to acquire NextWave. Under the terms of the agreement, Pfizer will make a payment to of $255 million to NextWave’s shareholders at the closing of the transaction, and NextWave’s shareholders are eligible to receive additional payments of up to $425 million based on certain sales milestones.

“This agreement demonstrates our focused expansion of the Established Products U.S. brands business to offer a diverse portfolio of high-quality medicines that meet patients’ needs,” said Albert Bourla, president and general manager in Pfizer’s Established Products Business Unit. “By combining the advantages of Quillivant XR with Pfizer’s commercialization expertise, we will be able to provide ADHD patients and their caregivers a new treatment option.”

“NextWave has been focused on helping patients and families who struggle with the challenges of ADHD. We are excited to partner with Pfizer, one of the most respected pharmaceutical organizations in the world, to bring the unique benefits of Quillivant XR to those affected by this challenging condition,” said Jay P. Shepard, president and chief executive officer of NextWave.

The transaction is expected to close during the fourth-quarter 2012, subject to regulatory approval in the United States, and other customary closing conditions.

Pfizer’s financial advisor for the transaction was Jefferies & Company, Inc. Pfizer Legal Alliance (PLA) firms Kaye Scholer LLP and Ropes & Gray LLP acted as legal counsel. The PLA is a collaborative partnership between Pfizer and 19 law firms. NextWave’s financial advisor for the transaction was Aquilo Partners, L.P., while Cooley LLP served as its legal advisor.

About Quillivant XR

IMPORTANT SAFETY INFORMATION

Quillivant XR is a federally controlled substance (CII) because it can be abused or lead to dependence. Keep Quillivant XR in a safe place to prevent misuse and abuse. Selling or giving away Quillivant XR may harm others and is against the law.

Tell your doctor if you or your child have (or have a family history of) ever abused or been dependent on alcohol, prescription medicines, or street drugs.

Quillivant XR should not be taken if you or your child are allergic to methylphenidate hydrochloride, or any of the ingredients in Quillivant XR, or are taking or have taken within the past 14 days an antidepression medicine called a monoamine oxidase inhibitor or MAOI.

Heart-related problems have been reported with CNS stimulant medications:

Sudden death in patients who have heart problems or heart defects

Stroke and heart attack in adults

Increased blood pressure and heart rate

Mental (psychiatric) problems can be caused or worsened by CNS stimulant medications:

New or worsening bipolar symptoms

New or worsening psychotic symptoms (such as hearing voices, believing things that are not true, are suspicious)

Call your doctor right away if you or your child have any heart-related symptoms or new or worsening mental (psychiatric) symptoms while taking Quillivant XR.

Quillivant XR may not be right for you. Tell your doctor if:

You or your child have heart problems, heart defects, or high blood pressure

You or your child have mental problems including psychosis (hearing voices, believing things that are not true, suspicious), mania, bipolar illness, or depression

You are pregnant or plan to become pregnant. It is not known if Quillivant XR will harm your unborn baby. Talk to your doctor if you are pregnant or plan to become pregnant

You are breastfeeding or plan to breast feed. Quillivant XR passes into your breast milk. You and your doctor should decide if you will take Quillivant XR or breast feed

Possible serious side effects of Quillivant XR are heart-related problems and mental problems, as well as slowing of growth (height and weight) in children.

Common side effects include:

Decreased appetite

Weight loss

Nausea

Stomach pain

Dry mouth

Vomiting

Trouble sleeping

Anxiety

Nervousness

Restlessness

Mood swings

Agitation

Irritability

Dizziness

Shaking (tremor)

Blurred vision

Increased blood pressure

Fast heart beat

Increased sweating

Fever

Talk to your doctor if you or your child have side effects that are bothersome or do not go away.

This is not a complete list of possible side effects. Ask your doctor or pharmacist for more information.

INDICATION

Quillivant XR is a central nervous system (CNS) stimulant prescription medicine. Quillivant XR is used for the treatment of Attention Deficit Hyperactivity Disorder (ADHD). Quillivant XR may help increase attention and decrease impulsiveness and hyperactivity in patients with ADHD.

Please see full Prescribing Information and Medication Guide, including BOXED WARNING regarding Abuse and Dependence, at http://www.quillivantxr.com.

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit or call 1-800-FDA-1088.

About ADHD

ADHD is one of the most common neurobehavioral disorders in the United States. According to the Centers for Disease Control and Prevention (CDC) 2009 report, almost one in 10 (9.5 percent) children aged 4–17 in the U.S. have at some time received a diagnosis of ADHD.1 The condition often lasts into adulthood, with adult ADHD affecting an estimated 4 percent of Americans.2 ADHD is characterized by symptoms that include difficulty paying attention, impulsive behaviors and, in some cases, patients being overly active.3

Pfizer Inc.: Working together for a healthier world®

At Pfizer (NYSE: PFE), we apply science and our global resources to improve health and well-being at every stage of life. We strive to set the standard for quality, safety and value in the discovery, development and manufacturing of medicines for people and animals. Our diversified global health care portfolio includes human and animal biologic and small molecule medicines and vaccines, as well as nutritional products and many of the world’s best-known consumer products. Every day, Pfizer colleagues work across developed and emerging markets to advance wellness, prevention, treatments and cures that challenge the most feared diseases of our time. Consistent with our responsibility as the world’s leading biopharmaceutical company, we also collaborate with health care providers, governments and local communities to support and expand access to reliable, affordable health care around the world. For more than 150 years, Pfizer has worked to make a difference for all who rely on us. To learn more about our commitments, please visit us at http://www.pfizer.com.

About NextWave Pharmaceuticals

NextWave is an emerging specialty pharmaceutical company primarily focused on the development and commercialization of unique products for the treatment of ADHD and related CNS disorders. More information about NextWave is available at http://www.nextwavepharma.com.

References

1. Centers for Disease Control and Prevention. Increasing prevalence of parent-reported attention deficit/hyperactivity disorder among children – United States, 2003 and 2007. MMWR. 2010;59(44):1439–43.

2. Kessler RC, Adler L, Barkley R, et al. The prevalence and correlates of adult ADHD in the United States: results from the National Comorbidity Survey Replication. Am J Psychiatry. 2006;163(4):716–23.

3. American Psychiatric Association. Diagnostic and statistical manual of mental disorders: DSM-IV-TR. Washington: American Psychiatric Association; 2000.

PFIZER DISCLOSURE NOTICE: The information contained in this release is as of October 22, 2012. Pfizer assumes no obligation to update forward-looking statements contained in this release as a result of new information or future events or developments.

This release contains forward-looking information about an agreement by Pfizer to acquire NextWave Pharmaceuticals, Inc., including NextWave’s product portfolio and research and development pipeline, and the potential benefits thereof, as well as about the anticipated timing of the closing of the transaction and of the availability of Quillivant XR in pharmacies in the U.S. Such information involves substantial risks and uncertainties, including, among other things, the satisfaction of conditions to closing the agreement, including obtaining regulatory approval in the U.S. ; the uncertainties inherent in research and development activities; decisions by regulatory authorities regarding whether and when to approve any drug applications that may be filed for product candidates in NextWave’s research and development pipeline as well as their decisions regarding labeling and other matters that could affect the availability or commercial potential of such product candidates; and competitive developments.

A further list and description of risks and uncertainties can be found in Pfizer’s Annual Report on Form 10-K for the fiscal year ended December 31, 2011 and in its reports on Form 10-Q and Form 8-K.

Contacts

Pfizer Inc.

Media

Joan Campion, 212-733-2798

or

Investors

Suzanne Harnett, 212-733-8009

Source:

http://www.biospace.com/news_story.aspx?NewsEntityId=276734&type=email&source=DD_102212

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VIEW VIDEO

Former FDA Chief on Modernizing Drug and Device Approvals

Introduction

John C. Reed, MD, PhD: Hello, and welcome to Medscape One-on-One. I’m Dr. John Reed, Professor and CEO of Sanford-Burnham Medical Research Institute. Joining me today at the Celebration of Science Conference at the National Institutes of Health (NIH) is Andrew C. von Eschenbach, President of Samaritan Health Initiatives, former Commissioner of the US Food and Drug Administration (FDA), and former Director of the National Cancer Institute (NCI). Welcome.

Andrew C. von Eschenbach, MD: Great to be with you.

The Collaboration of Government, Industry, and Academia

Dr. Reed: At this conference, you spoke about the interaction of government, industry, and academic centers. The relationship among these 3 entities is often challenging, but also crucial to the advancement of science. Can you give us a couple of examples how these partnerships are working well, and also some ideas of how we can improve collaboration among these groups?

Dr. von Eschenbach: I think we both appreciate that caring for patients, solving their problems, and curing their diseases is a team sport. We all have a part and a role to play in this. Government, academia, industry — we need to come together to figure out how to create these comprehensive systematic solutions to problems.

It starts with discovery. Academic centers and researchers like you are really revealing the mysteries of the underlying mechanisms of these diseases, and are making it possible for industry to start creating and developing solutions and interventions that can target those mechanisms and alter the outcome of those diseases — whether it’s eliminating suffering and death due to cancer or solving the problem of Alzheimer disease.

Government has to play a critical role in catalyzing and fostering that collaboration. A great example of where I saw this occurred was when I was at the NCI. When I looked at the government’s investment following the National Cancer Act in 1971, which enabled the NCI to create cancer centers, I could see 65 cancer centers all over this country. But what I also saw was that around these centers, there were these clusters of state-of-the-art care. There were these clusters of emerging biotechnology and the pharmaceutical industry coming together and creating an ecosystem that would be able to go from discovery and development to delivery.

Another great example is the state of Georgia, which did not have a cancer center at that time. But the state took money from the tobacco settlement, put it into a private endowment, and went about the business of creating the Winship Cancer Institute at Emory University in Atlanta. That attracted a united effort, including government funding from our cancer nanotechnology initiative. It brought in other academic institutions, such as Georgia Tech, and even private philanthropy from such institutions as Home Depot, for example.

We can make this work. We can bring the parts and pieces together as a team to use the brilliance of the science that you, Dr. Reed, have been doing, and others here at NIH and in academic institutions all around the world have been doing, and recognize that science is the means. The end is that we solve people’s problems, and we do it together.

Translating Life-Science Advancements Into Disease Cures and Prevention

Dr. Reed: That’s a great example of the catalytic role that government funding can play in economic development as well as advancing healthcare. You gave the example of Georgia. We’ve seen the same thing happen in the state of Florida, where tobacco settlement monies were used to create a seed investment. That spawned additional development of hospitals, and a government investment that turned a couple hundred jobs into tens of thousands of jobs for the state.

Let me change subjects. You were previously involved in laboratory and clinical research. Can you talk about how advancements in the field of life sciences are paving the way for possible cures and preventions for such diseases as prostate cancer? You used to be an urologist, and prostate cancer is a disease you worked on a lot. There are also neurodegenerative diseases, such as Alzheimer’s disease, which we’re all worried about. What are you excited about in these areas?

Dr. von Eschenbach: If I get a chance to talk to students and they ask what they should do in life, I tell them this is the most exciting time to go into medicine. And we are in the midst of the most profound transformation to ever occur in history in medicine going all the way back to Hippocrates. Throughout the history of medicine, physicians such as myself have been practicing a model based on our observations of the manifestations of disease.

I feel a lump in a woman’s breast. I see a shadow on a chest x-ray. I’m seeing the manifestations of an underlying disease, but it tells me nothing about what to do about it. All of our therapies and all of the things that we do about those observations have been empiric. Today we’re going from observing manifestations to actually understanding the mechanisms of the disease. We’re beginning to recognize the genes, the molecules, and the cellular processes that are responsible for and driving those disease processes. Once we have that knowledge of an underlying mechanism, it intuitively leads us to what the right solution is, to intervene in that mechanism and alter the outcome of that process.

Cancer, for example, is a disease process. It begins with our susceptibility, and that process ends with unfortunate suffering and death. But there are all these steps in between, and you have contributed personally to understanding some of those fundamental mechanisms.

Now physicians can be strategic. We can intervene in that process in a strategic way. Call it “personalized medicine” if you will. Get the right intervention for the right reason to the right patient at the right time, and you can prevent that process from happening. You can detect disease very early. You can eliminate it, or you can modulate and change its behavior and its outcome. You can alter the slope of the curve and allow patients to live the rest of their life never threatened by it.

This is the new frontier for medicine and for physicians. We will enter into this frontier with tools that we never had before. We can visualize biology with new imaging. We now have new therapies that are becoming available to us that will alter and change disease in radical ways. No longer is it just for cancer, surgery, chemotherapy, and radiation. The future for physicians is the most exciting, and yet it is a future that we have to grasp.

Dr. Reed: As a former director of the NCI, do you see a day where cancer patients will be treated not on the basis of whether their cancer arose in the lung or the colon, or the prostate, but on the basis of the underlying genetics of the cancer? By matching the mutations to the medicine — is that how you think it will look in the future?

Dr. von Eschenbach: Absolutely. We’ve been immersed in categorizing diseases on the basis of what we could observe, what we could see. We call something “breast cancer” because we feel a lump in a woman’s breast, or we call something “lung cancer” because it’s in the lung.

But now, as we’re looking at these underlying mechanisms, guess what? We’re finding out that some subsets of lung cancer look exactly like another kind of cancer. And therefore, from that point of view, they have the same treatment. You can use a drug for chronic myelogenous leukemia and it works exceedingly well in gastrointestinal stroma, tumors of the stomach, as well. Even more important, we understand a mechanism for cancer based on angiogenesis in the abnormal growth of blood vessels. We develop a drug for that to retard or slow down the cancer, and it turns out it’s one of the most effective drugs for macular degeneration of the eye.

For physicians and for those of us who are practicing medicine, we’re going to see disease through a different prism. When we see it through that different prism, we’re going to be able to see new ways of conquering many diseases. Cancer is just the lead here. But we’re going to be seeing the same kinds of dramatic changes and breakthroughs in neurocognitive diseases, diabetes, and cardiovascular disease along the way.

We’re also seeing it disseminate very rapidly. It’s no longer centers and then community practice. We’re seeing the opportunity now with new technologies even outside of medicine. We now have information technologies that will help us see a full continuum for every patient. It will mean absolutely state-of-the-art care by every physician, regardless of where you’re located.

Speeding Drug and Device Approvals

Dr. Reed: For these exciting new therapies to come to reality, they have to be approved by the FDA. You are a former commission of the FDA. Some clinicians are frustrated with the time it takes to get new medical devices and drugs approved by the FDA. You’ve been more sympathetic to the agency and the lack of resources it has to help it through a mighty tough job.

What do you think we should be doing — either the American people or the federal government — to better support the FDA and its efforts to get much needed treatments to patients more quickly?

Dr. von Eschenbach: The importance of the FDA can’t be overemphasized. It’s absolutely critical to this entire process of progress that I’ve been talking about. Let’s go back to our model of discovery, development, and delivery enterprise in medicine. It’s no longer linear — from the bench to the bedside. It’s actually circular.

What we’re seeing in terms of physicians delivering care is that there are tools that are now available to help us better understand the human biology of disease. When we treat disease or intervene in a human being, through functional imaging or whatever, it is actually a discovery platform making this process circular.

The success of the process of discovery, development, and delivery is going to be based on speed. How quickly can we do that? How quickly can we keep cycling that revolution of knowledge and intervention? At the hub of that wheel is the FDA. It can be the brake, or it can be the accelerator. It clearly is critical to how rapidly we’re going to be able to move from your brilliant discovery in the laboratory to the point where we’ve actually made a difference in a patient’s life.

Regulation has to be modernized. It’s a matter of making sure that the agency has the capacity and the capability. Funding resources are critically important. But what’s more important is we need a new way of doing business. We can no longer use a regulatory process and framework that served us well in the 20th century, but is woefully inadequate for this new reality in the 21st century.

For physicians, especially physicians out in the community, a simple piece of that equation is that we will play a critically important role in the perspective of clinical trials. The way we approve drugs now in phase 1, phase 2, and phase 3 of clinical trials is not commensurate with the mechanistic view of disease. So we’re going to change the FDA. And in doing so, we’re going to fulfill the promise for people.

Dr. Reed: We’re excited to hear that. At the Celebration of Science Conference, we heard a representative from the FDA, Janet Woodcock, talking about that very issue of having more adaptable clinical trial designs. That is an opportunity for us to increase the speed of learning and turnover with real-time feedback from imaging and biomarkers, which allows us to see whether the medicine is working.

Dr. von Eschenbach: The FDA has to practice regulation in the way that physicians practice medicine. Every patient, first of all, wants personalized medicine. They all want to know what’s right and what’s best for me. Doctor, what should I do? We now have the tools to become much more precise about that.

But every patient, also in a way, becomes their own experiment. We apply a therapy, and a rational physician makes a very sophisticated educated guess but never knows whether it’s actually going to work in that one patient. We monitor, and when we observe outcomes, we change. We alter the treatment until we get to that desired outcome.

Why don’t we approve drugs that way? Why don’t we use adaptive trial designs so that we learn as we go, and do that routinely rather than using this stepwise fashion that we’ve been locked into? We have to be open to change.

Promising New Methods of Treating Disease

Dr. Reed: You were once a practicing urologist, and you went on to become director of the NCI. In recent years, you’ve been active in a number of organizations dedicated to researching and developing new methods of treating a variety of diseases. Tell us one of the things that you’re most looking forward to.

Dr. von Eschenbach: Cancer had the opportunity to be at the forefront and the vanguard of this radical transformation. In 1970, cancer was a disease that was devastating us with regard to the human toll of suffering and death, and the economic consequences. At that time, the science of cancer was just beginning to become apparent in a way that we could begin to understand the cancer cell and the living normal cell at its very fundamental genetic and molecular level. That created this enormous cascade of progress.

What we’re seeing now is that the lessons learned and the progress made in cancer can now be disseminated to all the other diseases. For example, Alzheimer disease and neurocognitive and neurologic disorders are probably today where cancer was in 1970. Those diseases have a huge, devastating impact on human life and will bankrupt us in terms of the overall cost of healthcare and the cost of caring for patients affected by these diseases. But science is now emerging to help us better understand these diseases.

It’s a privilege to have lived the life of a cancer physician and researcher, and now I can transpose that experience to ask how we can do that for all diseases. That’s my passion today; it’s not just about cancer. It’s no longer cancer-centric, but it is cancer-led. Everyone will profit from the tremendous progress that researchers are making in the science that we will translate into cures for people.

Dr. Reed: Dr. von Eschenbach, thank you for joining us today. For Medscape One-on-One, I’m John Reed.

http://www.medscape.com/viewarticle/771952?src=ptalk

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Reporter: Aviva Lev-Ari, PhD, RN

Reform, Regulation, and Pharmaceuticals — The Kefauver–Harris Amendments at 50

Jeremy A. Greene, M.D., Ph.D., and Scott H. Podolsky, M.D.

N Engl J Med 2012; 367:1481-1483 October 18, 2012DOI: 10.1056/NEJMp1210007

 

Fifty years ago this month, President John F. Kennedy signed into law the Kefauver–Harris Amendments to the Federal Food, Drug, and Cosmetic Act (see photoPresident John F. Kennedy Signing the 1962 Kefauver–Harris Amendments.). With the stroke of a pen, a threadbare Food and Drug Administration (FDA) was given the authority to require proof of efficacy (rather than just safety) before approving a new drug — a move that laid the groundwork for the phased system of clinical trials that has since served as the infrastructure for the production of knowledge about therapeutics in this country. We often remember the Kefauver–Harris Amendments for the thalidomide scandal that drove their passage in 1962. But there is much we have collectively forgotten about Senator Estes Kefauver (D-TN) and his hearings on administered prices in the drug industry. Many parts of the bill left on Congress’s cutting-room floor in 1962 — and left out of our memories since — have not disappeared but continue to confront those who would ensure access to innovative, safe, efficacious, and affordable therapeutics.

By the time Kefauver began his investigation into the pharmaceutical industry in the late 1950s, the escalating expense of lifesaving prescription drugs was illustrating that the free-market approach to medical innovation had costs as well as benefits. From the development of insulin in the 1920s, through the “wonder drug” revolutions of sulfa drugs, steroids, antibiotics, tranquilizers, antipsychotics, and cardiovascular drugs in the ensuing decades, the American pharmaceutical industry had come to play a dominant role in the public understanding of medical science, the economics of patient care, and the rising politics of consumerism. For Kefauver, the “captivity” of the prescription-drug consumer in the face of price gouging and dubious claims of efficacy under-scored the need for the state to ensure that innovative industries worked to the benefit of the average American.

After 17 months of hearings, in which pharmaceutical executives were openly berated for profiteering and doctors were portrayed as dupes of pharmaceutical companies’ marketing departments, Kefauver presented his bill, S.1552. Perhaps its least controversial components were its calls for ensuring that the FDA review claims of efficacy before drug approval, monitor pharmaceutical advertising, and ensure that all drugs had readable generic names. More radically, Kefauver proposed completely overhauling the relationship between patents and therapeutic innovation. First, he proposed a compulsory licensing provision so that all important new drugs would generate competitive markets after 3 years. Second, and more controversial still, Kefauver wanted to eliminate “me-too drugs” and “molecular modifications” by insisting that a new drug be granted a patent only if it produced a therapeutic effect “significantly greater than that of the drug before modification.”1 Proving that a drug worked, according to Kefauver, was not enough: he wanted proof that a drug worked better than its predecessors. In contemporary terms, he wanted to know its comparative effectiveness.

Kefauver’s bill met strong resistance as it made its way through the Subcommittee on Antitrust and Monopoly.2 The American Medical Association firmly opposed the regulation of efficacy by a government agency, arguing that “the only possible final determination as to the efficacy and ultimate use of a drug is the extensive clinical use of that drug by large numbers of the medical profession over a long period of time.”3 The editors of the Journal, on the other hand, supported the efficacy provision and the expansion of generic drug names but opposed the patent provisions (considering them an “arbitrary discrimination” against the pharmaceutical industry) and the comparative effectiveness provisions (considering “proof of superiority” necessary only if superiority was actually being “claimed by the manufacturer”).4 The pharmaceutical industry amplified such concerns about comparative effectiveness, arguing that any a priori determination of which medicines were “me-too” and which were true innovations would be arbitrary. Efficacy was hard enough to prove, they suggested; proving comparative efficacy would be “completely impracticable.”3

Kefauver initially stuck to his guns on issues of compulsory licensing and patents, but his persistence ultimately cost him control of his own bill. In June of 1962, officials from the Kennedy administration and the pharmaceutical industry presented the subcommittee with an alternate bill — with no regulatory language about patents included. Kefauver cried foul, the Kennedy administration eased off its support, and S.1552 seemed to all observers to be a dead letter. It was only by chance timing that the summer of 1962 also produced a highly visible tragedy (thalidomide), a hero (Frances Kelsey), and enough ensuing public outcry to persuade Kefauver and Kennedy to embrace the gutted bill.

The amendments granted the FDA the power to demand proof of efficacy — in the form of “adequate and well-controlled investigations” — before approving a new drug for the U.S. market. They also led to a retrospective review of all drugs approved between 1938 and 1962 (the Drug Efficacy Study Implementation program), which by the early 1970s had categorized approximately 600 medicines as “ineffective” and forced their removal from the market. These market-making and unmaking powers were also tied to a new structure of knowledge generation: the orderly sequence of phase 1, phase 2, and phase 3 trials now seen as a natural part of any pharmaceutical life cycle.

However, a well-circulated grievance pointed to one unanticipated consequence of the amendments: the new burden of proof appeared to make the process of drug development both more expensive and much longer, leading to increasing drug prices and a “drug lag” in which innovative compounds reached markets in Europe long before they reached the U.S. market. Industry agitation surrounding the “drug lag” finally led to modification of the drug patenting system in the Drug Price Competition and Patent Term Restoration Act of 1984 — through further extension of drug patents. Indirectly, then, Kefauver’s amendments ultimately affected both pharmaceutical pricing and patenting — in a manner diametrically opposed to the one he intended.

Another unintended consequence of the amendments was that the new structures of proof changed not only the behavior of the pharmaceutical industry but also the conceptual categories used by biomedical researchers around the world.5 Pharmaceutical research came to be overwhelmingly organized around the placebo-controlled, randomized, controlled trial. Although this system has greatly helped researchers gauge the efficacy of an individual drug, it has also rendered data on comparative efficacy much more difficult — and much more expensive — to find or produce.

Renewed attention to comparative effectiveness research in the 21st century illustrates the consequences of sidelining Kefauver’s initial demand for comparative data for evaluating the promotion of novel therapeutics. By 2000, pharmaceutical expenditures had become one of the fastest-growing parts of the budget of many U.S. states and third-party insurers. But the kind of knowledge required for entry into the U.S. drug market offers consumers and payers little information relevant to choosing between subtly different “me-too” drugs within the same therapeutic class — whose therapeutic effect may or may not be the same. Only in the past decade, through the action of the Reforming States Group, the Drug Effectiveness Review Project, and most recently funding of comparative effectiveness research through the American Recovery and Reinvestment Act, the Affordable Care Act, and now the Patient-Centered Outcomes Research Institute, have we begun to catch up on the vital project of comparing therapeutics so that American consumers and their physicians can make meaningful treatment decisions — the project that motivated Kefauver’s original investigations a half century ago.

Disclosure forms provided by the authors are available with the full text of this article at NEJM.org.

SOURCE INFORMATION

From the Departments of Medicine and the History of Medicine, Johns Hopkins University School of Medicine, Baltimore (J.A.G.); and the Department of Global Health and Social Medicine, Harvard Medical School, and the Center for the History of Medicine, Francis Countway Library of Medicine — both in Boston (S.H.P.).

REFERENCES

  1. 1

    Congressional Record. Washington, DC: United States Senate, 1961;107:5639.

  2. 2

    Tobbell D. Pills, power, and policy: the struggle for drug reform in Cold War America and its consequences. Berkeley: University of California Press, 2012.

  3. 3

    Drug Industry Antitrust Act. 87th Congress, Session 1, 1961.

  4. 4

    Ethical drugs — reflections on the inquiry. N Engl J Med 1961;265:1015-1016
    Full Text | Web of Science

  5. 5

    Carpenter D. Reputation and power: organizational image and pharmaceutical regulation at the FDA. Princeton, NJ: Princeton University Press, 2010.

 

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FDA Approval for Under-Skin Defibrillator goes to Boston Scientific Corporation

Reporter: Aviva Lev-Ari, PhD, RN

 

Boston Scientific Corporation (BSX) Wins FDA Approval for Under-Skin Defibrillator

 

10/1/2012 7:09:13 AM

 

NATICK, Mass., Sept. 28, 2012 /PRNewswire/ — The U.S. Food and Drug Administration has granted Boston Scientific Corporation (NYSE: BSX) regulatory approval for its S-ICD® System, the world’s first and only commercially available subcutaneous implantable defibrillator (S-ICD) for the treatment of patients at risk for sudden cardiac arrest (SCA). The S-ICD System sits entirely just below the skin without the need for thin, insulated wires — known as electrodes or ‘leads’ — to be placed into the heart. This leaves the heart and blood vessels untouched, offering patients an alternative to transvenous implantable cardioverter defibrillators (ICDs), which require leads to be placed in the heart itself.

 

“The S-ICD System establishes the first new category of cardiac rhythm management devices since the introduction of cardiac resynchronization therapy,” said Raul Weiss, M.D., Associate Professor-Clinical, Cardiovascular Medicine at The Ohio State University. “Doctors now have a breakthrough treatment option that provides protection from sudden cardiac arrest without touching the heart.”

Approval of the S-ICD System was based on data from a 330-patient, prospective, non-randomized, multicenter clinical study, which evaluated the safety and effectiveness of the system in patients at risk of SCA. The S-ICD System met the primary endpoints of the study, and results were presented earlier this year at the Heart Rhythm Society 33rd Annual Scientific Sessions. The study results support that the S-ICD System is an important new treatment option for a wide range of primary and secondary prevention patients.

“With the addition of the S-ICD System, we believe Boston Scientific has a compelling and highly differentiated portfolio that will help fuel our growth strategy,” said Hank Kucheman, chief executive officer, Boston Scientific. “We are the only company to offer an FDA-approved subcutaneous implantable defibrillator and expect this to be the case for several years. The S-ICD System, coupled with our numerous recent regulatory approvals and our other innovative products, such as the WATCHMAN® Left Atrial Appendage Closure Device and Alair® Bronchial Thermoplasty System for the treatment of severe asthma, demonstrates our continued commitment to developing and bringing to market innovative products for physicians and their patients.”

Sudden cardiac arrest is an abrupt loss of heart function. Most episodes are caused by the rapid and/or chaotic activity of the heart known as ventricular tachycardia or ventricular fibrillation. Recent estimates show that approximately 850,000 people in the United States are at risk of SCA and indicated for an ICD device, but remain unprotected.

“Each year, thousands of patients indicated for an ICD are not referred to a specialist and remain untreated,” said William T. Abraham, MD, FACC, Director, Division of Cardiovascular Medicine at The Ohio State University Heart Center. “The S-ICD System is an important new treatment option that has the potential to improve patient acceptance of ICD therapy.”

The S-ICD System is designed to provide the same protection from sudden cardiac arrest as transvenous ICDs. The system has two main components: (1) the pulse generator, which powers the system, monitors heart activity, and delivers a shock if needed, and (2) the electrode, which enables the device to sense the cardiac rhythm and deliver shocks when necessary. Both components are implanted just under the skinthe generator at the side of the chest, and the electrode beside the breastbone. Unlike transvenous ICDs, the heart and blood vessels remain untouched. Implantation with the S-ICD System is straightforward using anatomical landmarks, without the need for fluoroscopy (an x-ray procedure that makes it possible to see internal organs in motion). Fluoroscopy is required for implanting the leads attached to transvenous ICD systems.

Boston Scientific expects to begin a phased launch of the S-ICD System that will expand over time as medical professionals are trained on the safe and effective use of the system. The company acquired the S-ICD System earlier this year when it completed the acquisition of Cameron Health, Inc. The S-ICD System received CE Mark in 2009 and is commercially available in many countries in Europe as well as in New Zealand. To date, more than 1,400 devices have been implanted in patients around the world. To download a high-resolution image of the S-ICD System go to: http://bostonscientific.mediaroom.com/home.

The S-ICD System is intended to provide defibrillation therapy for the treatment of life-threatening ventricular tachyarrhythmias in patients who do not have symptomatic bradycardia, incessant ventricular tachycardia, or spontaneous, frequently recurring ventricular tachycardia that is reliably terminated with anti-tachycardia pacing.

The WATCHMAN device is an investigational device in the United States. It is limited by applicable law to investigational use and not available for sale.

About Boston Scientific
Boston Scientific is a worldwide developer, manufacturer and marketer of medical devices that are used in a broad range of interventional medical specialties. For more information, please visit: www.bostonscientific.com.

Cautionary Statement Regarding Forward-Looking Statements
This press release contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934. Forward-looking statements may be identified by words like “anticipate,” “expect,” “project,” “believe,” “plan,” “estimate,” “intend” and similar words. These forward-looking statements are based on our beliefs, assumptions and estimates using information available to us at the time and are not intended to be guarantees of future events or performance. These forward-looking statements include, among other things, statements regarding our business plans and growth strategy, markets for our products, regulatory approvals, the importance of the S-ICD System, our technology, clinical trials, product launches, product performance and competitive offerings. If our underlying assumptions turn out to be incorrect, or if certain risks or uncertainties materialize, actual results could vary materially from the expectations and projections expressed or implied by our forward-looking statements. These factors, in some cases, have affected and in the future (together with other factors) could affect our ability to implement our business strategy and may cause actual results to differ materially from those contemplated by the statements expressed in this press release. As a result, readers are cautioned not to place undue reliance on any of our forward-looking statements.

Factors that may cause such differences include, among other things: future economic, competitive, reimbursement, legal and regulatory conditions; clinical trials and outcomes; new product introductions; product performance; demographic trends; intellectual property; litigation; financial market conditions; and future business decisions made by us and our competitors. Such factors are difficult or impossible to predict accurately and many of them are beyond our control. For a further list and description of these and other important risks and uncertainties that may affect our future operations, see Part I, Item 1A Risk Factors in our most recent Annual Report on Form 10-K filed with the Securities and Exchange Commission, which we may update in Part II, Item 1A Risk Factors in Quarterly Reports on Form 10-Q we have filed or will file hereafter. We disclaim any intention or obligation to publicly update or revise any forward-looking statements to reflect any change in our expectations or in events, conditions or circumstances on which those expectations may be based, or that may affect the likelihood that actual results will differ from those contained in the forward-looking statements. This cautionary statement is applicable to all forward-looking statements contained in this document.

CONTACT: Denise Kaigler
508-650-8330 (office)
Media Relations
Boston Scientific Corporation
denise.kaigler@bsci.com
Michael Campbell
508-650-8023 (office)
Investor Relations
Boston Scientific Corporation
investor_relations@bsci.com

SOURCE Boston Scientific Corporation

www.bostonscientific.com

 

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Reporter: Aviva Lev-Ari, PhD, RN

From MedscapeTopol on The Creative Destruction of Medicine

Topol: Consumer-Driven Healthcare Is an Uncomfortable Concept

Eric J. Topol, MD

Posted: 09/17/2012

Hi. I’m Dr. Eric Topol, Director of the Scripps Translational Science Institute and Editor-in-Chief of Medscape Genomic Medicine and theheart.org.

In this series, The Creative Destruction of Medicine, emanating from the book I wrote, I am trying to zoom in on critical aspects of how the digital world will create better healthcare. The segment that we are getting into today is on consumer-driven healthcare.

This is a concept that a lot of physicians are very uncomfortable with. If you go back to the Gutenberg printing press, it was only then in the Middle Ages when the Bible and all the printed information could be read by others besides the high priest. In fact, that’s an analogy of what is going to happen in medicine, because until now there has been this tremendous information asymmetry.

Essentially, all the data, information, and knowledge were in the domain of doctors and healthcare professionals, and the consumer, patient, and individual was out there without that information, not even their own data. But that’s changing very quickly.

Patients will have the capability of accessing notes from an office visit and hospital records, as well as laboratory data and DNA sequencing — and on one’s smartphone, for example, blood pressure and glucose and all the key physiologic metrics.

When each individual has access to all this critical data, there will be a real shakeup to the old way that medicine was practiced. In the past, the Internet was supposed to be empowering for consumers, but that really didn’t matter because what the consumer could get through the Internet was data about a population. Now, one can get data about oneself, and, of course, a center hub for that data-sharing will be the smartphone.

Even critical information based on one’s genomic sequencing, such as drug interactions, will have a whole different look. We’ve already learned so much about the direct-to-consumer movement from the pharmaceutical industry in which patients were directed to go to their doctors and ask them for a prescription drug. That had a very powerful impact.

But in the future, with each person potentially armed with so much data and information, the role of the doctor is a very different one: It is to provide guidance, wisdom, knowledge, and judgment and, of course, the critical aspects of compassion, empathy, and communication. That is a whole different look for the consumer-driven healthcare world of the future.

Thanks so much for your attention to this segment. We will be back with more on The Creative Destruction of Medicine.

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