Gut Microbiota Composition and Plasma Metabolomic Profile Associated with Amyloid Pathology and Cognitive Performance in MCI Patients
In 47 MCI patients, higher amyloid burden and worse cognitive performance were associated with distinct gut microbiota and plasma metabolomic profiles.
| Population | — |
|---|---|
| Exposure | — |
| Comparator | — |
| Outcome | — |
What the study showed
Higher amyloid burden (lower BA42/40) and worse cognition (higher ADAScog11) were linked to increased alpha diversity, distinct beta diversity, and enrichment of Bacteroides-associated taxa and Akkermansia. Short-chain fatty acid-producing genera (Faecalibacterium, Blautia, Phascolarctobacterium) were depleted. Plasma metabolomics identified a coherent signature associated with elevated BA42/40, though specific metabolites are not detailed in the available abstract.
How it was done
Cross-sectional multi-omics baseline analysis in 47 MCI patients enrolled in a randomized, double-blind, crossover dietary intervention trial (NCT05029765). Gut microbiota assessed by 16S rRNA sequencing; plasma metabolomics by untargeted LC-MS/MS.
Risk of bias
Cross-sectional design precludes causal inference; n=47 is small for multivariate multi-omics analyses, raising overfitting risk. The abstract is truncated, preventing full evaluation of metabolomic findings.
What this study does NOT prove
The study does not prove that gut microbiota alterations cause or accelerate amyloid pathology or cognitive decline.
In clinical practice
Findings are associative and exploratory; no clinical or dietary recommendation can be derived from this baseline analysis alone.
Limitations
Cross-sectional design precludes causal inference; n=47 is small for multivariate multi-omics analyses, raising overfitting risk. The abstract is truncated, preventing full evaluation of metabolomic findings.
Technical appendix
Version history
- 1.0 · 2026-07-17 — Auto-generated under Evidence Standard v1.0
Paid access: structured summary from public metadata; consult the original study at the source.