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Life sciences · Journal article
Experimental & Molecular Medicine · September 10, 2026
Encouraging direction, but not yet definitive.
This is an observational metagenomics study in a large Korean cohort identifying Dorea longicatena and Bifidobacterium adolescentis as microbial correlates of visceral fat accumulation via the glycogen synthesis pathway, with mechanistic support from oral gavage in a diet-induced obesity mouse model. The human associations are robust but correlational; the mouse experiments confirm that these strains promote weight and fat gain, but are limited to a single dietary context and do not establish whether they are necessary or sufficient.
Cross-sectional observational cohort with metagenomic analysis; mechanistic validation in diet-induced obesity mouse model. Large cohort of healthy Koreans in observational study; diet-induced obesity mice for validation study.. Intervention: Oral administration of D. longicatena or B. adolescentis in mouse model. Compared with: Diet-induced obesity model (comparator group or control arm not specified). Korea; mouse model conducted in laboratory setting (location not specified).
Strongest correlations with visceral fat observed in specific enterotypes using permutational multivariate analysis of variance and prediction modeling Shotgun sequencing identified glycogen synthesis pathway as mechanistically linked to visceral fat, mediated by D. longicatena and B. adolescentis Oral administration of D. longicatena or B. adolescentis significantly promoted body weight gain and fat mass expansion in diet-induced obesity mice
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These findings suggest that specific commensal bacteria may contribute to visceral obesity through metabolic pathways involving glycogen synthesis, but current evidence is insufficient to recommend clinical intervention. Further human studies with randomized design and longer follow-up are needed before microbiota-directed therapies can be considered.
Observational cohort analysis linked specific bacterial taxa to visceral fat via metagenomic pathway inference, validated in a single diet-induced obesity mouse model; mechanistic but limited by surrogate endpoints and animal confirmation only.
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Quoted from the source exactly as published.
These findings suggest that specific commensal bacteria may contribute to visceral obesity through metabolic pathways involving glycogen synthesis, but current evidence is insufficient to recommend clinical intervention. Further human studies with randomized design and longer follow-up are needed before microbiota-directed therapies can be considered.
Graded across the dimensions that decide whether you should act, each from what the source actually supports. There is no single score, and where a dimension was not assessed it says so.
Abstract Obesity, marked by visceral fat accumulation, has a complex relationship with the gut microbiome that impacts body weight and fat accumulation. However, previous studies did not account for fat distribution, reflecting only overall fat mass, leaving specifics of this relationship partially understood. Here we analyzed the mechanistic links between visceral fat and the microbiome in a large cohort of healthy Koreans. Using permutational multivariate analysis of variance and prediction modeling, we examined associations between microbial profiles and metabolic variables including insulin, triglycerides, waist circumference and visceral fat. The strongest correlations were noted with specific enterotypes. Shotgun sequencing revealed that visceral fat is linked to the glycogen synthesis pathway influenced by Dorea longicatena and Bifidobacterium adolescentis. This suggests that these specific microbial signatures and their associated functional potential play a role in visceral fat-related obesity. To validate these findings, we conducted an in vivo study using diet-induced obesity mouse model. Oral administration of D. longicatena or B. adolescentis significantly promoted body weight gain and fat mass expansion and induced hepatic lipogenic gene upregulation. The prevalence of these strains in Korean and American populations highlights their global relevance, contributing to the development of personalized treatments and advanced health strategies.
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