Autologous Myoblasts for the Treatment of Fecal Incontinence Results of a Phase 2 Randomized Placebo-controlled Study (MIAS)

作者：Boyer Olivier; Bridoux Valerie; Giverne Camille; Bisson Aurelie; Koning Edith; Leroi Anne Marie; Chambon Pascal; Dehayes Justine; Le Corre Stephanie; Jacquot Serge; Bastit Dominique; Martinet Jeremie; Houivet Estelle; Tuech Jean Jacques; Benichou Jacques; Michot Francis^*

来源：Annals of Surgery, 2018, 267(3): 443-450.

DOI：10.1097/SLA.0000000000002268

• autologous myoblasts
• cell therapy
• fecal incontinence
• stem cells

Objective: The aim of this study was to evaluate the efficacy of intrasphincteric injections of autologous myoblasts (AMs) in fecal incontinence (FI) in a controlled study.
Summary of Background Data: Adult stem cell therapy is expected to definitively cure FI by regenerating damaged sphincter. Preclinical data and results of open-label trials suggest that myoblast therapy may represent a noninvasive treatment option.
Methods: We conducted a phase 2 randomized, double-blind, placebo-controlled study of intrasphincteric injections of AM in 24 patients. The study compared outcome after AM (n = 12) or placebo (n = 12) injection using Cleveland Clinic Incontinence (CCI), score at 6 and 12 months. Patients in the placebo group were eligible to receive frozen AM after 1 year.
Results: At 6 months, the median CCI score significantly decreased from baseline in both the AM (9 vs 15, P = 0.02) and placebo (10 vs 15, P = 0.01) groups. Hence, no significant difference was found between the 2 groups (primary endpoint) at 6 months. At 12 months, the median CCI score continued to ameliorate in the AM group (6.5 vs 15, P = 0.006), while effect was lost in the placebo group (14 vs 15, P = 0.35). Consequently, there was a higher response rate at 12 months in the treated than the placebo arm (58% vs 8%, P = 0.03). After delayed frozen AM injection in the placebo group, the response rate was 60% (6/10) at 12 months.
Conclusions: Intrasphincteric AM injections in FI patients have shown tolerance, safety, and clinical benefit at 12 months despite a transient placebo effect at 6 months.

• 出版日期2018-3