Background: Fecal microbial transplantation (FMT) is a promising new method for treating active ulcerative colitis (UC), but knowledge regarding FMT for quiescent UC is scarce.
Aim: To investigate FMT for the maintenance of remission in UC patients.
Methods: Forty-eight UC patients were randomized to receive a single-dose FMT or autologous transplant via colonoscopy. The primary endpoint was set to the maintenance of remission, a fecal calprotectin level below 200 μg/g, and a clinical Mayo score below three throughout the 12-mo follow-up. As secondary endpoints, we recorded the patient's quality of life, fecal calprotectin, blood chemistry, and endoscopic findings at 12 mo.
Results: The main endpoint was achieved by 13 out of 24 (54%) patients in the FMT group and by 10 out of 24 (41%) patients in the placebo group (log-rank test, P = 0.660). Four months after FMT, the quality-of-life scores decreased in the FMT group compared to the placebo group (P = 0.017). In addition, the disease-specific quality of life measure was higher in the placebo group than in the FMT group at the same time point (P = 0.003). There were no differences in blood chemistry, fecal calprotectin, or endoscopic findings among the study groups at 12 mo. The adverse events were infrequent, mild, and distributed equally between the groups.
Conclusion: There were no differences in the number of relapses between the study groups at the 12-mo follow-up. Thus, our results do not support the use of a single-dose FMT for the maintenance of remission in UC.
Keywords: Fecal calprotectin; Fecal microbial transplantation; Inflammatory bowel disease; Maintenance of remission; Quality of life; Ulcerative colitis.
©The Author(s) 2023. Published by Baishideng Publishing Group Inc. All rights reserved.