Significant decrease in Faecalibacterium among gut microbiota in nonalcoholic fatty liver disease: a large BMI- and...

Area of Science:

• Gastroenterology and Hepatology
• Microbiome Research
• Metabolic Disease Research

Background:

• Gut microbiota alterations are observed in nonalcoholic fatty liver disease (NAFLD), but findings vary across studies.
• Previous research has not consistently isolated the impact of obesity and sex on these gut microbial changes.
• This study addresses these inconsistencies by examining gut microbiota in NAFLD patients while controlling for BMI and sex.

Purpose of the Study:

• To investigate gut microbiota composition differences between NAFLD and non-NAFLD individuals.
• To specifically evaluate the role of gut bacteria, excluding confounding factors like obesity and sex.
• To identify specific bacterial taxa associated with NAFLD pathogenesis.

Main Methods:

• A large cohort of 1148 adults was surveyed.
• NAFLD was diagnosed via ultrasonography, excluding other causes of fatty liver.
• Participants were matched for Body Mass Index (BMI) and sex to isolate microbiota differences.

Main Results:

• 205 participants (23.5%) had NAFLD.
• After BMI and sex matching (153 pairs), a significant decrease in Ruminococcaceae and Faecalibacterium was observed in NAFLD patients.
• The reduction in Faecalibacterium abundance was statistically significant (p=0.018).

Conclusions:

• A notable decrease in Faecalibacterium is a key finding in NAFLD patients, independent of BMI and sex.
• This reduction in Faecalibacterium is linked to the development and progression of NAFLD.
• Targeting Faecalibacterium may offer therapeutic potential for NAFLD.