Genzyme Presents Phase 3 Clinical Trial Extension Results for Cerdelga® (eliglustat) at Lysosomal Disease Network’s WORLD Symposium 2015

CAMBRIDGE, Mass. --Genzyme, a Sanofi company, today reportedextension study data from its Phase 3 ENGAGE and ENCORE studies of Cerdelga^® (eliglustat), a first-line oral therapy approved by the FDA and the European Commission for the treatment of certain adults with Gaucher disease type 1. The results from the studies were presented today at the 11^th Annual Lysosomal Disease Network WORLD Symposium in Orlando, Fla. Both extension studies demonstrated continued stability and/or improvements across established end points and published therapeutic treatment goals.

Genzyme developed Cerdelga, a capsule taken orally, to provide a treatment alternative for certain adult patients with Gaucher disease type 1 and to provide a broader range of treatment options for patients and physicians. Genzyme’s clinical development program for Cerdelga represents the largest clinical program ever focused on Gaucher disease, with approximately 400 patients treated in 29 countries.

The oral presentations on these Phase 3 studies were:

• ENGAGE — A Phase 3, Randomized, Double-Blind, Placebo-Controlled, Multi-Center Study to Investigate the Efficacy and Safety of Eliglustat in Adults with Gaucher Disease Type 1: Results after 18 Months, Pramod Mistry, MBBS, PhD, F.R.C.P, Director of Yale Lysosomal Disease Center and Gaucher Disease Treatment Center Yale School of Medicine: In the primary analysis period, improvements were seen across the following endpoints after 9 months on Cerdelga: spleen size, platelet count, hemoglobin concentration, and liver volume. In the 9 month extension phase, patients who switched from placebo to eliglustat showed improvements similar to the eliglustat-treated patients during the primary analysis while the eliglustat-treated patients continued to show improvements during the 9 month extension period. There were no treatment-related discontinuations.

• ENCORE— a Phase 3, Randomized, Controlled, Open-Label Non-Inferiority Study Comparing Eliglustat to Imiglucerase in Gaucher Disease Type 1 Patients Stabilized on Enzyme Replacement Therapy: 24-Month Results, Timothy M. Cox, MD, FRCP,
  Research Director and Professor of Medicine, Addenbrooke’s Hospital, Cambridge, UK. The study, which met the primary analysis criteria for non-inferiority to imiglucerase (Cerezyme^®), had a composite endpoint of each of the following parameters: spleen volume, hemoglobin concentration, platelet counts, and liver volume at 12 months. During the 12-month extension period, the patients who crossed over to eliglustat treatment from imiglucerase remained stable. Patients treated with eliglustat for 24 months also maintained stability of clinical parameters during the extension period.

The most common adverse reactions (≥10%) in the primary analysis periods of ENGAGE and ENCORE were fatigue, headache, nausea, diarrhea, back pain, pain in extremities, and upper abdominal pain. In both extension studies the majority of adverse reactions with Cerdelga were mild and transient, and consistent with those in the primary analysis periods.

Most patients in both of the Phase 3 studies continue to receive Cerdelga in longer term extension periods. The majority of patients are now in their 4^th or 5^th year of treatment.

“The continued work within Genzyme’s Gaucher program and the approval of Cerdelga represent are important to both the company and this patient community,” said Genzyme’s Acting Head of Rare Diseases, Richard Peters, M.D., Ph.D. “The results of the extension studies in which the majority of patients stayed on therapy support the use of Cerdelga as a first-line treatment option for the long-term management of Gaucher disease type 1.”

About Gaucher disease

Gaucher disease is an inherited condition affecting fewer than 10,000 people worldwide. People with Gaucher disease do not have enough of the enzyme, β-glucosidase (glucocerebrosidase) leading to the accumulation of its substrate, glucosylceramide. As a result, lipid engorged cells (called Gaucher cells) amass in different parts of the body, primarily the spleen, liver and bone marrow. Accumulation of Gaucher cells may cause spleen and liver enlargement, anemia, excessive bleeding and bruising, bone disease and a number of other signs and symptoms. The most common form of Gaucher disease, type 1, generally does not affect the brain.

About Cerdelga

Cerdelga (eliglustat), a novel glucosylceramide analog given orally, was designed to partially inhibit the enzyme glucosylceramide synthase, which results in reduced production of glucosylceramide. Glucosylceramide is the substance that builds up in the cells and tissues of people with Gaucher disease. The concept was initially developed by the late Norman Radin, PhD, from the University of Michigan. In pre-clinical studies, the molecule, developed with James A. Shayman, MD, also from the University of Michigan, showed specificity for glucosylceramide synthase. Following an extensive pre-clinical and early clinical research program, Cerdelga was studied in the largest Phase 3 clinical program ever conducted in Gaucher disease.

Cerdelga is registered as an orphan medicinal product for the treatment of Gaucher disease in the Community Register of Orphan Medicinal Products.

About Genzyme, a Sanofi Company

Genzyme has pioneered the development and delivery of transformative therapies for patients affected by rare and debilitating diseases for over 30 years. We accomplish our goals through world-class research and with the compassion and commitment of our employees. With a focus on rare diseases and multiple sclerosis, we are dedicated to making a positive impact on the lives of the patients and families we serve. That goal guides and inspires us every day. Genzyme’s portfolio of transformative therapies, which are marketed in countries around the world, represents groundbreaking and life-saving advances in medicine. As a Sanofi company, Genzyme benefits from the reach and resources of one of the world’s largest pharmaceutical companies, with a shared commitment to improving the lives of patients. Learn more at www.genzyme.com.

Genzyme^®, Cerezyme^®, and Cerdelga^®are registered trademarks of Genzyme Corporation. All rights reserved.

About Sanofi

Sanofi, a global healthcare leader, discovers, develops and distributes therapeutic solutions focused on patients' needs. Sanofi has core strengths in the field of healthcare with seven growth platforms: diabetes solutions, human vaccines, innovative drugs, consumer healthcare, emerging markets, animal health and Genzyme. Sanofi is listed in Paris (EURONEXT: SAN) and in New York (NYSE: SNY).

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