Sanofi and Regeneron Present Results from Pivotal Phase 3 Study of Sarilumab at American College of Rheumatology Annual Meeting

Sanofi and Regeneron Present Results from Pivotal Phase 3 Study of Sarilumab at American College of Rheumatology Annual Meeting

 - Data Show Significant Improvement in Signs and Symptoms and Physical Function in Rheumatoid Arthritis Patients who were Inadequate Responders to or Intolerant of TNF-Alpha Inhibitors (TNF-IR) -

 - Companies to host Investor Conference Call on sarilumab on Monday, Nov. 9 at 7 a.m. PT -

Paris, France and Tarrytown, New York - November 8, 2015 - Sanofi and Regeneron Inc. today announced results from a pivotal Phase 3 study of sarilumab, an investigational, human antibody against the IL-6 receptor. The results of the study, SARIL-RA-TARGET, are being presented today at an oral session during the American College of Rheumatology (ACR) Annual Meeting in San Francisco, California. The study met both its co-primary endpoints of improvements in signs and symptoms of rheumatoid arthritis (RA) and improvements in physical function, as well as secondary efficacy endpoints.¹

"Rheumatoid arthritis can be a debilitating disease that has a significant impact on a patient, and despite the availability of a wide range of treatments, new agents are still needed to address unmet patient needs including failure to respond to therapy," said Dr. Roy Fleischmann, clinical professor in the Department of Internal Medicine at the University of Texas Southwestern Medical Center and lead study author. "These data suggest that sarilumab, if approved, may be a potential option for patients with moderate-to-severe RA."

The SARIL-RA-TARGET trial enrolled 546 RA patients who were inadequate responders or intolerant of TNF-alpha inhibitors (TNF-IR). Patients were randomized to one of three treatment groups self-administered subcutaneously (SC) every other week (Q2W): sarilumab 200 milligrams (mg), sarilumab 150 mg, or placebo, in addition to non-biologic disease modifying anti-rheumatic drugs (DMARD) therapy. Top-line results were previously announced in May 2015.¹

Both sarilumab groups showed clinically relevant and statistically significant improvements compared to placebo in both co-primary endpoints:

• Improvement in physical function at week 12, as measured by mean change from baseline in the Health Assessment Questionnaire-Disability Index (HAQ-DI). The HAQ-DI measures patients' abilities to perform a standard set of daily physical activities. The change from baseline to week 12 in HAQ-DI was -0.49, -0.50, and      -0.29 in the sarilumab 200 mg (p=0.0004), sarilumab 150 mg (p=0.0007), and placebo groups, respectively.¹
• Improvements in signs and symptoms of RA at week 24, as measured by the proportion of patients achieving an ACR20 response (ACR20) were 61 percent in the sarilumab 200 mg group; 56 percent in the sarilumab 150 mg group; and 34 percent in the placebo group, all in combination with DMARD therapy (p less than 0.0001).¹

             
Secondary efficacy endpoints that will be presented during the ACR oral session include the following:²

• Proportion of patients achieving an ACR50 response at week 24 were 41 percent in the sarilumab 200 mg group, 37 percent in the sarilumab 150 mg group, and 18 percent in the placebo group (p less than 0.0001).
• Proportion of patients achieving an ACR70 response at week 24 were 16 percent in the sarilumab 200 mg group (p=0.0056), 20 percent in the sarilumab 150 mg group (p=0.0002), and 7 percent in the placebo group.
• The mean change from baseline to week 24 in disease activity score in 28 joints using C-reactive protein (DAS28-CRP), which evaluates the disease activity of RA, were as follows: -2.82, -2.35 and -1.38- in the sarilumab 200 mg, sarilumab 150 mg, and placebo groups, respectively.^2,3
• The proportion of patient achieving DAS28-CRP < 2.6 at week 24 were as follows: 29 percent, 25 percent, and 7 percent in the sarilumab 200 mg, sarilumab 150 mg, and placebo groups, respectively. ^2,4
• The change from baseline to week 24 in clinical disease activity index (CDAI), which also evaluates the disease activity of RA, were as follows: -30.43, -27.14, and -23.9 in the sarilumab 200 mg, sarilumab 150 mg, and placebo groups, respectively.^2,3
• The change from baseline to week 24 in HAQ-DI were as follows: -0.58, -0.52 and -0.34 -in the sarilumab 200 mg, sarilumab 150 mg, and placebo groups, respectively.¹ 

Treatment-emergent adverse events (TEAEs) were more frequent in the sarilumab groups (65 percent and 66 percent in sarilumab 200 mg and 150 mg vs 50 percent in placebo respectively). The incidence of serious adverse events (SAEs) was higher than placebo in the sarilumab 200 mg group (5 percent vs. 3 percent) and was similar to placebo in the 150 mg group (3 percent). ¹ Infection was the most frequently reported adverse event (30, 22 and 27 percent in the 200 mg, 150 mg and placebo groups respectively).² Serious infections occurred in 2 patients in the sarilumab 200 mg group, 1 patient in the sarilumab 150 mg group and 2 patients on placebo. The most frequent events leading to treatment discontinuation were infection and neutropenia. ¹ Adverse events and laboratory changes were consistent with observations from the MOBILITY study and with the mechanism of action of sarilumab.

During the same oral session at ACR, data from the SARIL-RA-ASCERTAIN/1309 studies will also be presented. In total, 14 abstracts were accepted for presentation at the meeting. This includes additional abstracts detailing data from the sarilumab clinical trial program: SARIL-RA-MOBILITY and SARIL-RA-EXTEND.

Sanofi and Regeneron will host an IR Thematic Conference Call for the financial community focusing on sarilumab on Monday Nov. 9 at 7:00 a.m. PT.  The conference call will include a presentation followed by a Q&A session. It will be accessible through an audio webcast at www.sanofi.com and www.regeneron.com and also via the following telephone numbers: France, +33 (0) 1 70 77 09 40; UK, +44 (0) 207 107 1613; and USA, +1 855 402 7761.

The Biologics License Application (BLA) for sarilumab was recently submitted to the FDA.

The investigational agent described above is currently under clinical development, and its safety and efficacy have not been evaluated by any regulatory authority.⁵

About Sarilumab
Sarilumab (REGN88/SAR153191) is a human monoclonal antibody directed against the IL-6 receptor (IL-6R).⁵ Sarilumab binds with high affinity to the IL-6 receptor. It blocks the binding of IL-6 to its receptor and interrupts the resultant cytokine-mediated inflammatory signaling. Sarilumab was developed using Regeneron's VelocImmune^® antibody technology.

About Sanofi
Sanofi, a global healthcare leader, discovers, develops and distributes therapeutic solutions focused on patients' needs. Sanofi has core strengths in 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).

About Regeneron Pharmaceuticals, Inc.
Regeneron (NASDAQ: REGN) is a leading science-based biopharmaceutical company based in Tarrytown, New York that discovers, invents, develops, manufactures, and commercializes medicines for the treatment of serious medical conditions. Regeneron commercializes medicines for high LDL cholesterol, eye diseases, and a rare inflammatory condition and has product candidates in development in other areas of high unmet medical need, including oncology, rheumatoid arthritis, asthma, atopic dermatitis, pain, and infectious diseases. For additional information about the company, please visit www.regeneron.com or follow @Regeneron on Twitter.

Sanofi Forward-Looking Statements
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Regeneron Forward-Looking Statements and Use of Digital Media
This news release includes forward-looking statements that involve risks and uncertainties relating to future events and the future performance of Regeneron Pharmaceuticals, Inc. ("Regeneron" or the "Company"), and actual events or results may differ materially from these forward-looking statements.  Words such as "anticipate," "expect," "intend," "plan," "believe," "seek," "estimate," variations of such words, and similar expressions are intended to identify such forward-looking statements, although not all forward-looking statements contain these identifying words.  These statements concern, and these risks and uncertainties include, among others, the nature, timing, and possible success and therapeutic applications of Regeneron's products, product candidates, and research and clinical programs now underway or planned, including without limitation  sarilumab; ongoing regulatory obligations and oversight impacting Regeneron's marketed products, research and clinical programs, and business, including those relating to patient privacy; unforeseen safety issues resulting from the administration of products and product candidates in patients, including serious complications or side effects in connection with the use of Regeneron's product candidates in clinical trials, such as the SARIL-RA clinical development program; the likelihood and timing of possible regulatory approval and commercial launch of Regeneron's late-stage product candidates, including without limitation sarilumab; determinations by regulatory and administrative governmental authorities which may delay or restrict Regeneron's ability to continue to develop or commercialize Regeneron's products and product candidates; competing drugs and product candidates that may be superior to Regeneron's products and product candidates; uncertainty of market acceptance and commercial success of Regeneron's products and product candidates and the impact of studies (whether conducted by Regeneron or others and whether mandated or voluntary) on the commercial success of Regeneron's products and product candidates; the ability of Regeneron to manufacture and manage supply chains for multiple products and product candidates; coverage and reimbursement determinations by third-party payers, including Medicare and Medicaid; unanticipated expenses; the costs of developing, producing, and selling products; the ability of Regeneron to meet any of its sales or other financial projections or guidance and changes to the assumptions underlying those projections or guidance; the potential for any license or collaboration agreement, including Regeneron's agreements with Sanofi and Bayer HealthCare LLC, to be cancelled or terminated without any further product success; and risks associated with intellectual property of other parties and pending or future litigation relating thereto.  A more complete description of these and other material risks can be found in Regeneron's filings with the United States Securities and Exchange Commission, including its Form 10-K for the year ended December 31, 2014 and its Form 10-Q for the quarter ended September 30, 2015.  Any forward-looking statements are made based on management's current beliefs and judgment, and the reader is cautioned not to rely on any forward-looking statements made by Regeneron. Regeneron does not undertake any obligation to update publicly any forward-looking statement, including without limitation any financial projection or guidance, whether as a result of new information, future events, or otherwise.

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Contacts Sanofi:

Contacts Regeneron:

References:
1.) Fleischmann, R. et al. (2015). "Efficacy and Safety of Sarilumab in Combination With csDMARDs in Patients With Active Rheumatoid Arthritis Who Were Inadequate Responders or Intolerant of Anti-TNF-Alpha Therapy: Results From a Phase 3 Study" Abstract. Last accessed October 2015.
2.) Fleischmann, R. et al. (2015). "TARGET Primary Efficacy and Safety: ACR 2015 Presentation. Last accessed October 2015.
3.) Anderson, J. "Measures of Rheumatoid Arthritis Disease Activity." Arthritis Care & Research November 2011 (63) S11; S14 -S36. Last accessed October 2015.
4.) DAS28. "How to calculate the DAS28." Available at: http://www.das-score.nl/das28/en/difference-between-the-das-and-das28/how-to-measure-the-das28/how-to-calculate-the-das28.html. Last accessed October 2015.
5.) Sieper, J. et al (2014). "Sarilumab for the treatment of ankylosing spondylitis: results of a Phase II, randomised, double-blind, placebo-controlled study (ALIGN)." Last accessed October 2015.