Novel Microbial Engraftment Trajectories following Microbiota Transplantation Therapy in Ulcerative Colitis.

Daphne Moutsoglou, Aneesh Syal, Sharon Lopez, Elizabeth C Nelson, Lulu Chen, Amanda J Kabage, Monika Fischer, Alexander Khoruts, Byron P Vaughn, Christopher Staley
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Abstract

Background and aims: Microbiota transplant therapy is an emerging treatment for ulcerative colitis. One proposed mechanism for the benefit of microbiota transplant therapy is through engraftment of donor microbiota. However, the kinetics of engraftment are unknown. We identified SourceTracker as an efficient method both to determine engraftment and for the kinetic study of engrafting donor taxa to aid in determining the mechanism of how this therapy may treat ulcerative colitis.

Methods: Ulcerative colitis patients were treated with either encapsulated (drug name MTP-101C) or placebo capsules daily for eight weeks followed by a four-week washout period. Amplicon sequence data from donors and patients were analyzed using the Bayesian algorithm SourceTracker.

Results: Twenty-seven patients were enrolled, 14 to the placebo group and 13 to the microbiota transplant therapy group. Baseline Shannon and Chao1 indices negatively correlated with week 12 donor engraftment for patients treated with active drug capsules but not for placebo patients. SourceTracker engraftment positively correlated with the week 12 distance from donors measured using the Bray-Curtis similarity metric in treated patients but not with placebo. We identified engrafting taxa from donors in our patients as well as quantified the proportion of donor similarity or engraftment during weeks one through eight (active treatment) and week 12, four weeks after the last dose.

Conclusion: SourceTracker can be used as a simple and reliable method to quantify donor microbial community engraftment and donor taxa contribution in patients with ulcerative colitis and other inflammatory conditions treated with microbiota transplant therapy.

溃疡性结肠炎微生物群移植疗法后的新型微生物移植轨迹
背景和目的:微生物群移植疗法是治疗溃疡性结肠炎的一种新兴疗法。微生物群移植疗法获益的一个拟议机制是通过供体微生物群的移植。然而,移植的动力学尚不清楚。我们发现,SourceTracker 是一种有效的方法,既能确定移植情况,又能对移植供体分类群进行动力学研究,从而帮助确定这种疗法治疗溃疡性结肠炎的机制:溃疡性结肠炎患者每天服用胶囊剂(药名 MTP-101C)或安慰剂,疗程为八周,然后是四周的冲洗期。使用贝叶斯算法 SourceTracker 分析供体和患者的扩增子序列数据:27 名患者入组,其中安慰剂组 14 人,微生物群移植疗法组 13 人。接受活性药物胶囊治疗的患者的基线香农指数和Chao1指数与第12周的供体移植物率呈负相关,而安慰剂患者则不相关。在接受治疗的患者中,SourceTracker 移植率与使用 Bray-Curtis 相似度指标测量的第 12 周与供体的距离呈正相关,而安慰剂患者则不然。我们确定了患者体内供体的移植分类群,并量化了第 1 到 8 周(积极治疗)和第 12 周(最后一次用药后 4 周)期间供体相似度或移植的比例:SourceTracker可作为一种简单可靠的方法,用于量化接受微生物群移植治疗的溃疡性结肠炎和其他炎症患者的供体微生物群落移植情况和供体分类群贡献。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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