Novel strain of Pseudoruminococcus massiliensis possesses traits important in gut adaptation and host-microbe...

Area of Science:

• Microbiology
• Gastroenterology
• Genomics

Background:

• Fecal microbiota transplantation (FMT) is effective for recurrent Clostridioides difficile infection.
• FMT is being explored for other intestinal and systemic diseases.
• Understanding species transferred during FMT is crucial.

Purpose of the Study:

• To isolate and characterize novel bacterial strains from FMT donors.
• To investigate the functional and adhesive properties of a new Pseudoruminococcus massiliensis strain.

Main Methods:

• Isolation of a novel bacterial strain (E10-96H) from a healthy FMT donor.
• Whole genome sequencing and comparative analysis with the type strain.
• In vitro assays to assess enzymatic activity (starch degradation) and host cell adhesion.

Main Results:

• A novel strain, E10-96H, of Pseudoruminococcus massiliensis was identified.
• The strain's genome shows high similarity to the type strain and possesses 20 glycoside hydrolase genes.
• E10-96H degrades starch in vitro, adheres to enterocytes without inducing inflammation, and exhibits pilus-like structures.

Conclusions:

• Pseudoruminococcus massiliensis E10-96H may contribute to fiber degradation and butyrate production in the gut.
• The strain demonstrates commensal behavior, adhering to the epithelium without provoking an inflammatory response.
• Further research is needed to elucidate the role of P. massiliensis in intestinal ecology.