Genzyme Presents New Data from Alemtuzumab Phase 2 MS Trial at 63rd Annual Meeting of the American Academy Of Neurology

CAMBRIDGE, Mass.--(BUSINESS WIRE)--Genzyme, a subsidiary of sanofi-aventis Group (EURONEXT: SAN and NYSE: SNY), announced today that it will present new data from its completed Phase 2 trial of the investigational drug alemtuzumab for multiple sclerosis (MS) at the American Academy of Neurology's (AAN) 63rd Annual Meeting in Hawaii, April 9 - 16, 2011. Included among the additional Phase 2 trial safety and efficacy data at AAN will be presentations on the clinically-active disease status of patients through five-years of patient follow-up as well as data describing a measure of vision improvement.

“We look forward to the availability of Phase 3 results in the middle of this year.”

“We are excited to present new alemtuzumab data at AAN that further reflects alemtuzumab's potential as an MS treatment,” said Michael Panzara, Genzyme Group Vice President and Therapeutic Area Head for Multiple Sclerosis and Immune Diseases. "We look forward to the availability of Phase 3 results in the middle of this year.”

Alemtuzumab is a humanized monoclonal antibody being studied as a potential therapy for relapsing-remitting multiple sclerosis (RRMS). Genzyme is currently conducting two pivotal Phase 3 trials to evaluate alemtuzumab in the treatment of MS. CARE-MS I is a randomized trial comparing alemtuzumab to the approved MS therapy Rebif® (high dose interferon beta-1a) in early, active RRMS patients who have received no prior therapy. CARE-MS II, which also compares alemtuzumab to Rebif, is studying RRMS patients who relapsed while on other MS therapies. Data from these trials are expected to be available beginning in mid-2011.

Genzyme’s CAMMS223 Phase 2 trial, first reported in the New England Journal of Medicine in 2008, compared alemtuzumab to Rebif in early, active, RRMS patients who had received no prior therapy. In the trial, which was larger and longer than most Phase 2 MS clinical trials, alemtuzumab was given to patients in two or three annual cycles of not more than five days per cycle, while Rebif was given to patients three times per week, every week for three years. The study included an extended phase for collection of long-term efficacy and safety data.

Alemtuzumab data to be presented at AAN:

Abstract titles

  • More Alemtuzumab Relapsing−Remitting Multiple Sclerosis Patients Are Free of Clinical Disease Activity at Five Years (Poster PD6.003, April 14)
  • Alemtuzumab Improves Contrast Sensitivity in Relapsing−Remitting Multiple Sclerosis Patients (Presentation S31.001, April 13)
  • Alemtuzumab Positively Affects Disability Outcomes Using a One−Year−Sustained Criterion for Relapsing−Remitting Multiple Sclerosis Patients in CAMMS223 (Poster P01.216, April 11)
  • Effect of Alemtuzumab vs. Interferon beta−1a on Brain Atrophy in Patients with Early, Active Relapsing−Remitting Multiple Sclerosis (Poster P05.042, April 13)
  • Analysis of Innate Immune Cells Following Alemtuzumab Treatment in Human CD52 Transgenic Mice (Poster P02.201, April 12)
  • Alemtuzumab and Thyroid Autoimmunity in Relapsing−Remitting Multiple Sclerosis Patients in CAMMS223 (Poster P03.242, April 12)

About Alemtuzumab

Alemtuzumab is a humanized monoclonal antibody being studied as a potential therapy for relapsing-remitting multiple sclerosis. Alemtuzumab targets the cell-surface glycoprotein CD52, which is often expressed on T- and B-lymphocytes. Preliminary research suggests that alemtuzumab depletes the T- and B-cells that may be responsible for the cellular damage in MS, while potentially sparing other cells of the immune system. Early alemtuzumab research has also suggested a distinctive pattern of lymphocyte reconstitution in patients following treatment.

About CAMMS223 Phase 2 Study

In the Phase 2 trial, 334 patients with early active relapsing-remitting multiple sclerosis were randomized to treatment with alemtuzumab at one of two dose levels, or to the approved MS therapy Rebif® (high dose interferon beta-1a). Alemtuzumab was given to patients in two or three annual cycles of not more than five days per cycle, while Rebif was given to patients three times per week, every week for three years. The majority of alemtuzumab treated patients last received the investigational drug at Month 12.

The trial successfully met its two primary endpoints, reduction in relapse rate and reduction in the rate of sustained accumulation of disability.

Patients were strongly encouraged to continue for two additional years of follow-up beyond the original three years of the study. Sixty-eight percent of alemtuzumab patients participated in the follow-up program, and 60 percent were evaluated at 60 months. Forty-two percent of Rebif patients participated in the follow-up program, and 35 percent were evaluated at 60 months. Rater-blinded disability scores were assessed quarterly and relapses as-needed. A sensitivity analysis adjusted for patients receiving alternative disease-modifying therapy during the follow-up period, as well as for retreatment with alemtuzumab.

Safety Information

As previously reported, common adverse events associated with alemtuzumab in the CAMMS223 Phase 2 trial included mild to moderate infusion-associated reactions, secondary autoimmunity (primarily thyroid disorders and immune thrombocytopenia), and infections, particularly of the upper respiratory tract; infections were predominantly mild to moderate in severity and there were no life-threatening or fatal infections. Approximately 30 percent of alemtuzumab-treated patients developed an autoimmune thyroid-related adverse event. Thyroid disorders were managed using conventional therapies. Patient monitoring for thyroid disorders, ITP, and anti-GBM disease is incorporated into all Genzyme-sponsored trials of alemtuzumab for the investigational treatment of MS.

Since it is not yet approved for the treatment of MS, alemtuzumab must not be used in MS patients outside of a formal, regulated clinical trial setting in which appropriate patient monitoring measures are in place.

About Genzyme

One of the world's leading biotechnology companies, Genzyme is dedicated to making a major positive impact on the lives of people with serious diseases. Since its founding in 1981, the company has introduced breakthrough treatments across several areas of medicine that have provided new hope for patients. Today, approximately 10,000 Genzyme employees serve patients in nearly 100 countries.

Genzyme's products are focused on rare inherited disorders, kidney disease, orthopaedics, cancer, transplant, and immune disease. The company's commitment to innovation continues today with a substantial development program focused on these fields, as well as cardiovascular disease, neurodegenerative diseases, and other areas of unmet medical need. Genzyme is part of the sanofi-aventis Group.

About sanofi-aventis

Sanofi-aventis, a leading global pharmaceutical company, discovers, develops and distributes therapeutic solutions to improve the lives of everyone. Sanofi-aventis is listed in Paris (EURONEXT: SAN) and in New York (NYSE: SNY).

Genzyme Forward Looking Statements

This press release contains forward-looking statements regarding Genzyme’s future plans and business strategies, including its expectations about when data from its two phase 3 trials for alemtuzumab will be available and the potential success of alemtuzumab to treat MS. These statements are subject to risks and uncertainties that could cause actual results to differ materially from those projected in these forward-looking statements, including: the timing and outcome of the data from the phase 3 trials; the timing and outcome of discussions with the regulatory agencies regarding approval of alemtuzumab for MS; the actual safety and efficacy of alemtuzumab for MS; and the risks and uncertainties described in Genzyme’s reports filed with the Securities and Exchange Commission under the Securities Exchange Act of 1934, including the factors discussed under the caption "Risk Factors" in Genzyme's Annual Report on Form 10-K for the period ended December 31, 2010. Genzyme cautions investors not to place undue reliance on the forward-looking statements contained in this press release. These statements speak only as of the date of this press release, and Genzyme undertakes no obligation to update or revise these statements.

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