Microbiota replacement for Clostridium difficile by capsule is as effective as via colonoscopy

Modulating the microbiome in chronic liver diseases - current evidence on the role of fecal microbiota transplantation

INTRODUCTION

The gut microbiota has a complex relationship with the human host and is key to maintaining health. Disruption of the healthy diverse gut microbial milieu plays an important role in the pathogenesis of several diseases including Clostridioides difficile infection (CDI), inflammatory bowel disease, irritable bowel syndrome, alcohol-related liver disease and metabolic-dysfunction associated steatotic liver disease (MASLD). Fecal microbiota transplantation (FMT) is highly effective in treating CDI, though its utility in other diseases is still being explored.

AREAS COVERED

In this narrative review, we explore the role of gut microbiota in liver diseases, focusing on key changes in the microbial composition and function. We summarize current evidence on the role of FMT, identifying gaps in current research and outlining future directions for investigation. We comprehensively searched PubMed through 15 October 2024 to identify relevant studies.

EXPERT OPINION

While data from available studies shows promise, more research is necessary before we can use FMT for liver diseases. Key areas that require further study are - determining the optimal FMT regimen for each disease, establishing efficacy and safety with larger clinical trials, ensuring safe and equitable access to the FMT product and mechanistic insights into the reasons for success or failure of FMT.

Therapies to modulate gut microbiota: Past, present and future

The human gut microbiota comprises of a complex and diverse array of microorganisms, and over the years the interaction between human diseases and the gut microbiota has become a subject of growing interest. Disturbed microbial milieu in the gastrointestinal tract is central to the pathogenesis of several diseases including antibiotic-associated diarrhea and Clostridioides difficile infection (CDI). Manipulation of this microbial milieu to restore balance by microbial replacement therapies has proven to be a safe and effective treatment for recurrent CDI. There is considerable heterogeneity in various aspects of stool processing and administration for fecal microbiota transplantation (FMT) across different centers globally, and standardized microbioal replacement therapies offer an attractive alternative. The adverse effects associated with FMT are usually mild. However, there is paucity of data on long term safety of FMT and there is a need for further studies in this regard. With our increasing understanding of the host-microbiome interaction, there is immense potential for microbial replacement therapies to emerge as a treatment option for several diseases. The role of microbioal replacement therapies in diseases other than CDI is being extensively studied in ongoing clinical trials and it may be a potential treatment option for inflammatory bowel disease, irritable bowel syndrome, obesity, multidrug resistant infections, and neuropsychiatric illnesses. Fecal microbiota transplantation for non-CDI disease states should currently be limited only to research settings.

Faecal microbiota transplantation for eradicating carriage of multidrug-resistant organisms: a systematic review

BACKGROUND

Multidrug-resistant (MDR) microorganism development in the gut is frequently the result of inappropriate antibiotic use. Faecal microbiota transplantation (FMT) restores normal gut microbiota in patients with Clostridium difficile infection. We hypothesized that it may help in decolonizing MDR organisms (MDROs) and in preventing recurrent MDR infections.

OBJECTIVES

To assess FMT efficacy (eradication rate) for decolonizing MDROs and preventing recurrent MDR infections.

DATA SOURCES

Medline, Embase and Web of Science (inception through 11 February 2019).

STUDY ELIGIBILITY CRITERIA

Clinical trials, retrospective studies, case reports and case series.

PARTICIPANTS

Patients with MDR infections or MDRO colonization treated with FMT.

INTERVENTIONS

FMT.

METHODS

Systematic review.

RESULTS

Twenty-one studies (one randomized clinical trial, seven uncontrolled clinical trials, two retrospective cohort studies, two case series, nine case reports) assessing 192 patients were included. Three studies assessed FMT efficacy in preventing MDR infections; 16 assessed its effect on MDRO colonization; two assessed both. Data from 151 patients were included in the final analyses. In studies with low to moderate risk of bias, the eradication rate was 37.5% to 87.5%. Efficacy was similar in studies looking at infection or colonization and did not differ by length of follow-up. No serious adverse events from FMT were reported. Seven patients died of other causes.

CONCLUSIONS

FMT could be used as a treatment for eradicating MDR colonization and possibly preventing recurrent MDR infections, once more supporting efficacy and safety data are available. Larger well-designed randomized controlled trials are needed to further explore this therapy.

Management of Clostridioides difficile colitis: insights for the gastroenterologist

Clostridioides difficile infection (CDI) is a common cause of diarrhea in both inpatient and outpatient settings. The last few years have seen major changes in the treatment spectrum of CDI, most notably, recommendations against using metronidazole for initial CDI, the addition of fidaxomicin and bezlotoxumab, and emergence of microbial replacement therapies. Several other therapies are undergoing clinical trials. This narrative review focuses on the treatment of CDI with a summary of literature on the newer modalities and the treatment guidelines issued by Infectious Diseases Society of America and European Society of Clinical Microbiology and Infectious Diseases.