The relationship of Megamonas species with nonalcoholic fatty liver disease in children and adolescents revealed by metagenomics of gut microbiotaOriginal paper
Karen Pendergrass is a microbiome researcher specializing in microbiome-targeted interventions (MBTIs). She systematically analyzes scientific literature to identify microbial patterns, develop hypotheses, and validate interventions. As the founder of the Microbiome Signatures Database, she bridges microbiome research with clinical practice. In 2012, based on her own investigative research, she became the first documented case of FMT for Celiac Disease, four years before the first published case study.
Read MoreWhat was studied?
Researchers examined gut microbiota genus and species composition in children and adolescents with nonalcoholic fatty liver disease (NAFLD), comparing obese children with NAFLD, obese children without NAFLD, and healthy lean children.
How was it studied?
Fifty eight children and adolescents at Shenzhen Children's Hospital underwent magnetic resonance spectroscopy to quantify liver fat fraction, and stool samples were analyzed by shotgun metagenomics. Participants were grouped by BMI, MRS fat fraction, and a combined BMI-MRS scheme (NAFLD_AW, Ctrl_AW, Ctrl_Lean).
What did they find?
The genus Megamonas, along with species Megamonas hypermegale and Megamonas rupellensis, was enriched in NAFLD children compared with controls, and especially enriched in obese NAFLD children versus lean or non-NAFLD obese peers. Conversely, Dialister, Akkermansia, Odoribacter, and Alistipes genera were depleted in obese children, and species such as Akkermansia muciniphila and Bacteroides thetaiotaomicron were reduced. A Megamonas-associated pathway, P461-PWY, was also significantly increased in NAFLD_AW children.
Why it matters
These findings suggest NAFLD status and associated diet may drive enrichment of Megamonas species in the pediatric gut microbiome, pointing to a potential gut-liver axis signature worth further investigation.