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DOP04 Matching between donors and patients in faecal microbiota transplantation is important for long-term maintenance on ulcerative colitis

D. Ishikawa PhD, K. Okahara, M. Takahashi, K. Haga, K. Nomura, T. Shibuya, A. Nagahara

Department of Gastroenterology, Juntendo University, Tokyo, Japan

Background

We previously demonstrated that fresh-faecal microbiota transplantation (FMT) following triple-antibiotic therapy [amoxicillin, fosfomycin, and metronidazole (AFM); A-FMT] for ulcerative colitis (UC) patients induced changes in the phylum Bacteroidetes, which constitutes a critical factor correlated with clinical responses. Here, we analyse the short- and long-term efficacy of A-FMT comparing to AFM monotherapy, and we explore the concept of a beneficial donor for long-term maintenance.

Methods

This prospective and non-randomised control study was conducted from July 2014 to March 2017. Eligible patients were at least 20 years of age, with a diagnosis of active UC which were required a Lichtiger’s clinical activity index (CAI) of 5 or more, or with an endoscopic Mayo score of 1 or more. Patients’ spouses or relatives in the family were selected as donors. AFM was administered to patients with UC for 2 weeks, and up to 2 days before fresh FMT. Clinical response was defined as a decrease of CAI of 3 points or more, and remission was defined as 3 points or less. Maintenance of efficacy was defined as no exacerbation of CAI and no intensification of treatments.

Results

Seventy-nine patients completed protocol (A-FMT; n = 47, mono-AFM; n = 32). At 4 weeks after treatment, clinical response and remission were observed in 31 and 19 patients (65.9%, 40.4%) in A-FMT, which higher than in mono-AFM respectively (56.2%, 18.7%). The maintenance rate of clinical responder was shown to be significantly higher in A-FMT than in AFM at 12 months and 24 months after treatment (A-FMT vs. mono-AFM, p = 0.046 and 0.034, Wilcoxon test). In A-FMT, in case that the age difference between donor and patient is more than 11 years, maintenance rate was significantly lower than 0–10 age difference in A-FMT (≥11 vs. 0–10, n = 14, 16; p = 0.004 and p = 0.003, log-rank test). Siblings relationship has a significantly higher maintenance rate compared with parent–child relationship (Siblings vs. parent–child; n = 7, 13; p = 0.009 and p = 0.006, log-rank test).

Conclusion

A-FMT exhibited reassuring clinical outcomes in terms of short and long term. This is the first report of FMT to reveal the importance of matching between donors and patients for long-term maintenance on UC.

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