No safety issues observed, study to continue as per protocol without modifications
LINCOLNSHIRE, Ill.--(BUSINESS WIRE)-- BioSante Pharmaceuticals, Inc. (NASDAQ: BPAX) today announced that the Phase III LibiGel (testosterone gel) cardiovascular and breast cancer safety study will continue without modifications and will continue to enroll new subjects as a result of the fourth unblinded review of adverse events and the first unblinded statistical analysis for sample-size determination by its independent Data Monitoring Committee (DMC). The review and statistical analysis were based on 2,500 subjects who have been enrolled in the study. LibiGel is in development for the treatment of female sexual dysfunction (FSD), specifically, hypoactive sexual desire disorder (HSDD) in menopausal women, for which there is currently no FDA approved product.
“We are very pleased that the DMC recommended that the study should continue without modification. This means that there are no general or specific safety issues based on their unblinded review of adverse events. The low number of CV events to date is consistent with the safety of testosterone in women,” stated Michael Snabes, M.D., Ph.D., the senior vice president of medical affairs for BioSante. “Once the DMC determines that there are enough subjects enrolled for statistical significance, enrollment of new subjects into the study will be complete. The current LibiGel safety study protocol allows for up to 4,000 women to be enrolled.”
Another unblinded statistical analysis will be conducted by the DMC each time there is an additional adjudicated cardiovascular event. With approximately 2,300 women-years of exposure in the study, there have been only 14 adjudicated cardiovascular (CV) events, a rate of approximately 0.65 percent, compared to an expected rate of CV events for this study of approximately two percent. Moreover, there have been seven breast cancers reported, a rate of approximately 0.32 percent, compared to an expected rate of approximately 0.35 percent.
Subjects have been in the study for an average of approximately 10.7 months. There are approximately 850 subjects who have been in the study for over one year and approximately 400 subjects who have been in the study for more than two years. The LibiGel Phase III safety study represents the largest data base of the safety of testosterone in women. A new drug application (NDA) can be submitted after an average of 12 months of exposure with subjects followed for five years in total, including after NDA submission and potential FDA approval. BioSante’s objective is to submit the LibiGel NDA in 2011.
The statistical analyses of the CV events are based on predefined statistical methods, in accordance with BioSante’s agreement with the FDA, to determine if LibiGel can be considered safe for post-menopausal women. Upon completion of the statistical analyses of the safety study and efficacy trials, BioSante intends to submit an NDA to the FDA, requesting approval to market LibiGel for the treatment of HSDD in menopausal women.
“With this most recent favorable DMC recommendation, we continue to believe that LibiGel will be the first product approved by the FDA to treat HSDD in menopausal women, also referred to as FSD,” said Stephen M. Simes, BioSante’s president & CEO.
About the LibiGel Phase III Cardiovascular and Breast Cancer Safety Study
The Phase III LibiGel safety study is a randomized, double-blind, placebo-controlled, multi-center, cardiovascular (CV) events and breast cancer study that will enroll between 2,500 and 4,000 women. The study will continue for a total of five years, however, BioSante can use the safety study data as part of an NDA submission after an average of 12 months of exposure to LibiGel or placebo.
The LibiGel safety study is tracking a predefined list of CV events, in agreement with the FDA, including CV death, myocardial infarction and stroke in women 50 years of age or older and suffering from at least two CV risk factors including hypertension and diabetes. The objective of the safety study is to show the relative safety of testosterone compared to placebo in the number of CV events. The incidence of breast cancer also is being tracked over the course of the study.
LibiGel is a testosterone gel in Phase III clinical development for the treatment of women who suffer from female sexual dysfunction (FSD). The on-going Phase III efficacy trials are double-blind, placebo-controlled trials that will enroll up to approximately 500 surgically menopausal women each for a six-month clinical trial. The efficacy trials are being conducted under an FDA-approved special protocol assessment (SPA) agreement. LibiGel is absorbed quickly through the skin after applying a once-daily pea-sized topical application on the upper arm that delivers testosterone to the bloodstream evenly over time.
In a Phase II trial, LibiGel significantly increased the number of satisfying sexual events in surgically menopausal women suffering from FSD by 238 percent versus baseline (p<0.0001); this increase also was significant versus placebo (p<0.05). In this study, the effective dose of LibiGel produced testosterone blood levels within the normal range for pre-menopausal women and had a safety profile similar to that observed in the placebo group. In addition, no serious adverse events and no discontinuations due to adverse events occurred in any subject receiving LibiGel. The Phase II clinical trial was a double-blind, placebo-controlled trial, conducted in the United States, in surgically menopausal women distressed by their low sexual desire and activity.
About BioSante Pharmaceuticals, Inc.
BioSante is a specialty pharmaceutical company focused on developing products for female sexual health and oncology. BioSante’s lead products include LibiGel® (transdermal testosterone gel) for the treatment of female sexual dysfunction (FSD) which is in Phase III clinical development under a U.S. Food and Drug Administration (FDA) Special Protocol Assessment. BioSante also is developing a portfolio of cancer vaccines (GVAX), three of which have been granted orphan drug designation, and are currently in several Phase II clinical trials. Other products in development are Bio-T-Gel™, a testosterone gel for male hypogonadism licensed to Teva Pharmaceuticals and an oral contraceptive in Phase II clinical development using BioSante patented technology. The company also is developing its calcium phosphate technology (CaP) for aesthetic medicine (BioLook™), among other uses, as well as seeking opportunities for its 2A/Furin and other technologies. Additional information is available online at: www.biosantepharma.com.
To the extent any statements made in this news release deal with information that is not historical, these are forward-looking statements under the Private Securities Litigation Reform Act of 1995. Such statements include, but are not limited to, statements about BioSante’s plans, objectives, expectations and intentions with respect to future operations and products, the timing of anticipated regulatory submissions and other statements identified by words such as “will,” “potential,” “could,” “can,” “believe,” “intends,” “continue,” “plans,” “expects,” “anticipates,” “estimates,” “may,” other words of similar meaning or the use of future dates. Forward-looking statements by their nature address matters that are, to different degrees, uncertain. Uncertainties and risks may cause BioSante’s actual results to be materially different than those expressed in or implied by BioSante’s forward-looking statements. For BioSante, particular uncertainties and risks include, among others, the difficulty of developing pharmaceutical products, obtaining regulatory and other approvals and achieving market acceptance; the marketing success of BioSante’s licensees or sublicensees; the success of clinical testing; and BioSante’s need for and ability to obtain additional financing. More detailed information on these and additional factors that could affect BioSante’s actual results are described in BioSante’s filings with the Securities and Exchange Commission, including its most recent annual report on Form 10-K and subsequent quarterly reports on Form 10-Q. All forward-looking statements in this news release speak only as of the date of this news release. BioSante undertakes no obligation to update or revise any forward-looking statement, whether as a result of new information, future events or otherwise.
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