MEDIVATION : Announces Positive Top-Line Results From Phase 2 Dimebon Study in Huntington's Disease
07/07/2008| 04:02pm US/Eastern
SAN FRANCISCO, July 7 /PRNewswire-FirstCall/ -- Medivation, Inc.
(Nasdaq: MDVN) today announced top-line results of a Phase 2 study showing
that its investigational drug Dimebon(TM) significantly improved cognitive
function in patients with mild-to-moderate Huntington's disease (HD).
Cognitive function was significantly improved over placebo (p=0.03) as
measured by the Mini-Mental State Examination (MMSE), the cognition scale most
widely used by clinicians to assess patients with neurodegenerative diseases.
Dimebon-treated patients also demonstrated favorable results on the behavioral
component of the United Huntington's Disease Rating Scale (UHDRS), a composite
scale measuring several components of HD, but these results did not reach
Dimebon was very well tolerated in this trial. The overall incidence of
adverse events was lower in the Dimebon group than in the placebo group, an
unusual finding in a clinical study of any drug. This result is consistent
with a similar finding from the first pivotal Alzheimer's disease trial in
which Dimebon-treated patients had significantly fewer serious adverse events
after one year of treatment. Of particular note, Huntington's disease
patients treated with Dimebon had fewer falls (9%), a common problem in this
patient population that often results in injury and associated health care
costs, than did patients on placebo (16%). The most common adverse event in
the Dimebon group was headache, which occurred in 19% of treated patients
compared to 7% of placebo patients. Headaches were generally mild in
severity. Dry mouth and depressed mood were similar in both treated and
placebo groups (4% and 7%, respectively).
"To my knowledge, no other drug has resulted in statistically significant
benefit in cognition in Huntington's disease patients in a randomized,
well-controlled trial," said Karl Kieburtz, M.D., M.P.H., professor of
neurology at the University of Rochester, director of the HSG Clinical Trials
Coordination Center, and principal investigator in this trial. "Cognitive
impairment is the most important therapeutic unmet need in Huntington's
disease. I am pleased by this result and Dimebon's favorable safety profile,
and believe that further development of this compound is warranted."
The randomized, double-blinded, placebo-controlled Phase 2 trial was
conducted at 16 centers in the United States and the United Kingdom in
collaboration with the Huntington Study Group (HSG), a network of more than
250 experienced clinical trial investigators, coordinators and consultants
from more than 60 academic and research institutions throughout the United
States, Canada, Europe and Australia dedicated to clinical research of
Huntington's disease. The trial enrolled 90 HD patients, with half randomized
to Dimebon and the other half to placebo for a three-month dosing period. The
primary endpoint of the trial was safety and tolerability. The secondary
endpoint was efficacy, as measured by the MMSE, the UHDRS and the Alzheimer's
Disease Assessment Scale-cognitive subscale (ADAS-cog), a cognition scale
generally used in Alzheimer's disease clinical trials.
"We are very encouraged that Dimebon improved cognition and was well
tolerated in both trials assessing efficacy that we have conducted to date --
this trial and our first pivotal trial in Alzheimer's disease. The
consistency seen in the data between these two trials underscores the
potential for this drug," said Lynn Seely, M.D., chief medical officer of
Medivation. "These data are also important because they provide further
support for our belief that Dimebon is exerting its benefits through a novel
mechanism of action targeting mitochondrial dysfunction, a contributor to the
loss of neuronal function in Huntington's disease. Medivation is committed to
aggressively advancing development of Dimebon for patients and families
devastated by Huntington's disease."
Full results from the Phase 2 study will be submitted for presentation at
an upcoming scientific meeting.
About Huntington's Disease
Huntington's disease is a progressive, neurodegenerative disease that
affects approximately 30,000 people in the U.S., with an additional 150,000 at
risk, qualifying it as an orphan drug indication. It is caused by the death
of specific brain cells and is characterized by the gradual development of
involuntary muscle movement, progressive deterioration of cognitive processes
and memory (dementia) and severe behavioral disturbances. There are currently
no drugs approved by the U.S. Food and Drug Administration to treat this
uniformly fatal genetic disorder.
Dimebon is an orally-available small molecule that has been shown to
inhibit brain cell death in preclinical models relevant to Alzheimer's disease
and Huntington's disease, making it a potential treatment for these and other
neurodegenerative diseases. The Company is currently enrolling patients in an
international confirmatory Phase 3 clinical trial evaluating the efficacy and
safety of Dimebon in patients with mild-to-moderate Alzheimer's disease.
Preclinical data generated to date suggest that Dimebon operates through a
novel mitochondrial mechanism of action.
Medivation will host a teleconference at 5:00 p.m. Eastern Daylight Time
today. To participate in the live call by telephone, please dial 877-419-6590
from the U.S. or 719-325-4860 internationally. A telephone replay will be
available following the conclusion of the call until July 9 at midnight by
dialing 888-203-1112 from the U.S. or 719-457-0820 for international callers
and entering passcode 4109873. Individuals interested in listening to the
live call via webcast may do so by visiting http://www.medivation.com. A
replay of the webcast will be available on the Company's website for 30 days.
Medivation, Inc. is a biopharmaceutical company focused on the rapid
development of novel small molecule drugs to treat serious diseases for which
there are limited treatment options. Medivation aims to improve the treatment
of these diseases and offer hope to critically ill patients and their
caregivers. The Company's current clinical development program includes a
pivotal and confirmatory Phase 3 trial of Dimebon(TM) in Alzheimer's disease,
a Phase 2 clinical trial of Dimebon in patients with Huntington's disease, and
a Phase 1-2 clinical trial of MDV3100 in patients with castration-resistant
(also known as hormone-refractory) prostate cancer. For more information,
please visit us at http://www.medivation.com.
This press release contains forward-looking statements, including
statements regarding anticipated future development of Dimebon, which are made
pursuant to the safe harbor provisions of the Private Securities Litigation
Reform Act of 1995. Forward-looking statements involve risks and uncertainties
that could cause actual results to differ significantly from those projected.
You are cautioned not to place undue reliance on the forward-looking
statements, which speak only as of the date of this release. None of the
Company's product candidates has been approved for sale, significant
additional animal and human testing is required in order to seek marketing
approval for any of its product candidates, and Medivation cannot assure you
that marketing approval can be obtained for any of its product candidates.
Furthermore, as is typically the case at this stage of the regulatory review
process, the FDA has not yet performed an in-depth review of Medivation's
preclinical and clinical data, so its views remain subject to change.
Medivation's filings with the Securities and Exchange Commission, including
its Current Report on Form 8-K filed on June 23, 2008, include information
about additional factors that could affect the Company's financial and
SOURCE Medivation, Inc.