Pfizer Announces Positive Top-Line Results for Phase 3 Trial of Etrasimod in Ulcerative Colitis Patients

– ELEVATE 12 study met primary and key secondary endpoints of improving clinical remission at week 12 –

– Safety profile consistent with previous Phase 2 studies –

Pfizer Inc. (NYSE: PFE) today announced positive topline results from a Phase 3 study of etrasimod, an investigational, oral, once-a-day, selective sphingosine 1-phosphate (S1P) receptor modulator in development for the treatment of moderately to severely active ulcerative colitis (UC). In the study, etrasimod patients achieved statistically significant improvements in the primary endpoint of clinical remission at week 12 as compared with placebo. Statistically significant improvements were achieved in all key secondary endpoints in the trial as well. The safety profile was consistent with previous Phase 2 studies.

“These positive results demonstrate that etrasimod, if approved, could be a potential breakthrough option for patients with ulcerative colitis who aren’t able to experience improvement on current therapies,” said Michael Corbo, Chief Development Officer, Inflammation & Immunology, Pfizer Global Product Development. “This outcome represents a continuation of our effort to develop new therapeutic approaches to treat immuno-inflammatory diseases and address the need for oral therapies for UC patients with inadequate response, loss of response, or intolerance to conventional or advanced therapies.”

The global phase 3 multi-center, randomized, double-blind, placebo-controlled study, also known as ELEVATE 12, enrolled 354 UC patients who had previously failed or were intolerant to at least one conventional, biologic, or JAK therapy. Participants received etrasimod 2mg once daily.

Full results from the study will be submitted for future scientific publication and presentation. These data along with results from ELEVATE 52 are expected to form the basis for planned future regulatory filings. Results from the ELEVATE 52 study will be available by the end of Q1. Additional information about the studies can be found at www.clinicaltrials.gov under the identifiers NCT03996369 and NCT03945188.

Etrasimod was developed by Arena Pharmaceuticals, which was recently acquired by Pfizer.

About Etrasimod

Etrasimod is an oral, once-a-day, selective sphingosine 1-phosphate (S1P) receptor modulator being investigated for a range of immuno-inflammatory diseases including ulcerative colitis, Crohn’s Disease, atopic dermatitis, eosinophilic esophagitis, and alopecia areata.

In a Phase 2, randomized, placebo-controlled, dose-ranging study (OASIS) in moderate to severe UC patients, most patients who achieved clinical response, clinical remission, or endoscopic improvement at week 12 experienced sustained or improved effects up to week 46, with etrasimod 2 mg in the open-label extension. Etrasimod also demonstrated a favorable benefit/risk profile, consistent with safety findings reported in the double-blind portion of OASIS.

About Ulcerative Colitis

UC is a chronic and often debilitating inflammatory bowel disease1 that affects many people worldwide, including an estimated 3.8 million people in North America and Europe.2 Symptoms of UC can include chronic diarrhea with blood and mucus, abdominal pain and cramping, and weight loss.3,4 UC can have a significant effect on work, family and social activities.4

About Pfizer Inflammation & Immunology

At Pfizer Inflammation & Immunology, we strive to deliver breakthroughs that enable freedom from day-to-day suffering for people living with autoimmune and chronic inflammatory diseases, which can be debilitating, disfiguring and distressing, dramatically affecting what they can do. With a focus on immuno-inflammatory conditions in Rheumatology, Gastroenterology and Medical Dermatology, our current portfolio of approved medicines and investigational molecules spans multiple action and delivery mechanisms, from topicals to small molecules, biologics and biosimilars. The root cause of many immunological diseases is immuno-inflammation, which requires specifically designed agents. Our differentiated R&D approach resulted in one of the broadest pipelines in the industry, where we purposefully match molecules to diseases where we believe they can make the biggest difference. Building on our decades-long commitment and pioneering science, we continue to advance the standard of care for patients living with immuno-inflammatory diseases and are working hand-in-hand with patients, caregivers and the broader healthcare community on healthcare solutions for the many challenges of managing chronic inflammatory diseases, allowing patients to live their best lives.

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