Synergy Pharma (SGYP) Announces Long-Term Plecanatide Data Update in CIC w/ IBS-C
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Synergy Pharmaceuticals Inc. (Nasdaq: SGYP) presented new long-term safety data of plecanatide, its investigational, orally-administered compound currently being evaluated by the U.S. Food and Drug Administration (FDA) for the treatment of chronic idiopathic constipation (CIC) and irritable bowel syndrome with constipation (IBS-C). These data, which were presented at the American College of Gastroenterology (ACG) annual scientific meeting, showed that plecanatide was associated with low adverse events and low discontinuation rates in patients with CIC who received plecanatide (3 mg or 6 mg) once-daily for up to 72 weeks.
Plecanatide is the first investigational therapy designed to replicate the activity of uroguanylin, a naturally occurring human gastrointestinal (GI) peptide, by working locally in the proximal small intestine to stimulate digestive fluid movement and support regular bowel function.
In this long-term study, which evaluated 2,370 patients, the most common adverse events in both dose groups were diarrhea (7.1%) and urinary tract infection (2.2%). The remainder of adverse events occurred in less than 2% of patients treated with plecanatide. Adverse events leading to discontinuation occurred in 5.3% of patients treated with plecanatide, with discontinuation due to diarrhea occurring in 3.1% of patients. In addition, this study asked patients about level of treatment satisfaction and desire to continue treatment. The median score for treatment satisfaction was 4.0 (4=quite satisfied) and for continuation of treatment was 4.0 (4=quite likely).
“Chronic idiopathic constipation is a complex and often debilitating condition, and there remains an unmet need for new, effective therapies for the millions of Americans who may not have found a treatment option with which they are satisfied,” said Satish S.C. Rao, M.D., PhD, Professor of Medicine, Division Chief Fellowship Program Director and Director, Digestive Health Center at Augusta University. “The data presented today at ACG provide additional information regarding the Phase 3 efficacy and safety clinical trials and support the long-term safety of plecanatide, reinforcing the potential of plecanatide as a new treatment option for this condition.”
Synergy also presented plecanatide data from an integrated efficacy and safety analysis which are consistent with findings of two previously presented double-blind, placebo-controlled Phase 3 trials that evaluated more than 2,600 patients with CIC over a 12-week treatment period. These additional analyses confirmed a significantly greater response rate of durable overall complete spontaneous bowel movements (CSBM) — a primary endpoint defined by the FDA for regulatory approval in CIC—in each of the two plecanatide dose groups (3 mg, 20.5%; 6 mg, 19.8%) when compared to the placebo group (11.5%, p<0.001 for both doses). These significant increases in CSBMs with both plecanatide dose groups were seen as early as the first week and maintained through the treatment period compared with placebo. Results at 12 weeks also found:
- Secondary endpoints (stool consistency, straining and bloating) were significantly improved compared to placebo.
- Adverse event rates were similar across plecanatide-treatment groups and placebo (30.6% in 3 mg and 31.1% in 6 mg dose groups compared to 28.7% in placebo), Diarrhea was the most common adverse event (4.6% in 3 mg and 5.1% in 6 mg compared to 1.3% in placebo).
- Discontinuation rates were low across all treatment groups (3 mg, 4.1%; 6 mg, 4.5%; and placebo, 2.2%).
“Synergy has pioneered a different way to think about constipation, which is reflected in our approach to plecanatide,” said Patrick H. Griffin, MD, FACP, Executive Vice President and Chief Medical Officer of Synergy Pharmaceuticals. “We are excited to bring these new data to gastroenterologists at ACG. We are committed to developing and bringing to market novel therapies that offer the potential to significantly improve the lives of patients living with CIC and other GI conditions.”
The Prescription Drug User Fee Act (PDUFA) target action date for plecanatide in CIC is January 29, 2017.
In addition, Synergy has already completed patient recruitment for the two double-blind, placebo-controlled Phase 3 clinical trials with plecanatide in IBS-C and remains on-track to report top-line data from both trials in the fourth quarter of this year. Pending approval in the CIC indication, Synergy plans to file a New Drug Application Supplement with Clinical Data (sNDA) for plecanatide in IBS-C in the first quarter of 2017 and expects a 10-month review period from submission.
About Chronic Idiopathic Constipation (CIC)
CIC affects 14 percent of the population in North America, disproportionately affecting women and older adults. People with CIC have persistent symptoms of difficult and infrequent bowel movements. CIC can severely impact people’s daily lives, increasing stress levels and anxiety.
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