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Fecal Short-Chain Fatty Acids to Predict Prediabetes and Type 2 Diabetes Risk: An Exploratory Cross-Sectional Study.

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This summary is machine-generated.

Fecal acetic acid levels are linked to reduced type 2 diabetes risk but increased prediabetes risk. Further research is needed to understand the biological significance of these short-chain fatty acid findings.

Keywords:
SCFA profilesclinical studiesdietary intakedysglycemiagut microbiotametabolic risk factorsmicrobial metabolites

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Area of Science:

  • Metabolomics
  • Microbiome research
  • Diabetes mellitus

Background:

  • Gut microbiota composition is altered in dysglycemic states like prediabetes (preDM) and type 2 diabetes (T2D).
  • Short-chain fatty acids (SCFAs) are microbial metabolites that may reflect these changes, but their predictive value for glycemic status is unclear.

Purpose of the Study:

  • To investigate the association between fecal SCFA concentrations and glycemic status (normoglycemia, prediabetes, type 2 diabetes) in a Mediterranean adult population.
  • To assess the predictive role of SCFAs in relation to prediabetes and type 2 diabetes risk.

Main Methods:

  • Analysis of 88 participants from the Di@bet.es study, categorized into normoglycemic (NonDM), prediabetes (preDM), and type 2 diabetes (T2D) groups.
  • Gut microbiota analysis via massive sequencing and SCFA quantification using gas chromatography-mass spectrometry.
  • Adjusted multiple logistic regression models to determine associations between SCFAs and metabolic status.

Main Results:

  • Fecal acetic acid was significantly lower in T2D participants compared to NonDM and preDM groups.
  • Lower fecal acetic acid was associated with reduced T2D risk (OR=0.561) when preDM was the reference.
  • Higher fecal acetic acid predicted increased preDM risk (OR=1.422), while propionic acid was inversely associated with preDM (OR=0.714).

Conclusions:

  • Fecal acetic acid levels show a dual association: reduced risk of T2D but increased risk of prediabetes.
  • The precise biological mechanisms underlying these SCFA associations with glycemic status require further investigation.