Fecal Microbiota Therapy (FMT)

SUMMARY Rationale: The(small) intestinal microbiota composition has been implicated to play an important role in (human) metabolism, as well as autoimmune diseases such as type 1 diabetes mellitus. Faecal microbiota transplantation (FMT) has been shown to significantly alter the microbiota composition, without any serious side-effects. It was recently demonstrated that multiple infusions of own faeces(autologous) preserved residual beta cell function up to one year after start of the FMT. In a proof-of-principle study it was found that encapsulated autologous FMT provides a safe and feasible option for prolonged treatment on a daily basis, which might stabilize the beta-cell destruction. These exciting findings are potentially transformative for clinical practice and deserve replication in a larger placebo-controlled trial. Objective: confirm the efficacy and feasibility of daily ingested encapsulated freeze-dried autologous (own)faecal matter on the preservation of residual beta cell function as assessed by C-peptide release upon amixed meal test (MMT) in recently diagnosed type 1 diabetes mellitus (T1D). Study design: double-blind placebo-controlled study Study population: n=110, recently diagnosed (\<100 days of diagnosis) patients with T1D, aged 18-45 years, BMI 18-30 kg/m2, male/female. Intervention: After inclusion and randomisation individuals will receive for 6 months either placebo or freeze-dried autologous encapsulated FMT in a 1:2 ratio. Subsequently, participants with be followed for 6 months whether beta cell preservation was durable after cessation of treatment. Main study parameters/endpoints: The primary endpoint is long-term preservation of beta cell insulin secretion capacity as assessed by stimulated C-peptide AUC0-120minresponse upon MMT (at0, 6 and 12months).The secondary endpoint pertains to changes in post-meal urinary C-peptide levels, plasma biochemistry (HbA1c levels),glucose time-in-range and subsequentexogenous insulin dose use at 0, 6 and 12months. Nature and extent of the burden and risks associated with participation,benefit and group relatedness: This study is considered a low-risk study, 3MMTs will be performed, for which 70 ml of blood samples will be drawn each visit. As of today, no severe adverse events as result of FMT have been reported in this centre and in the ENCAPSULATE trial investigating the feasibility and safety of this approach participants only reported some minor and transient constipation. In addition, the use of autologous faeces comes with a lower(absent)risk for transmitting any unknown pathogens compared to an allogenic FMT. As there currently is no widely applied therapy to preserve beta cell function in type 1 diabetes, encapsulated autologous FMT can have a potential benefit for the participants.

The goal of this clinical trial is to learn if oral lyophilized fecal microbiota therapy (ORAL-LYO-FMT) helps treat diarrhea-predominant irritable bowel syndrome (IBS-D) and prevent the recurrence of Clostridioides difficile infection (rCDI). The main questions it aims to answer are: * Does ORAL-LYO-FMT reduce IBS symptoms? * Does it prevent rCDI after treatment? * What side effects or safety concerns might occur? Researchers will compare ORAL-LYO-FMT to a placebo (a look-alike capsule with no active treatment) to see how well it works. Participants will: * Be randomly assigned to take ORAL-LYO-FMT or placebo for up to 7 weeks * Take capsules three times per week (Monday, Wednesday, Friday) * Complete health questionnaires and have follow-up visits by phone or in person for up to 6 months The trial also looks at changes in quality of life, mood, and new or ongoing medical conditions over time.