Gut microbial diversity is associated with lower arterial stiffness in women. (9th May 2018)

• Record Type: Journal Article
• Authors: Menni, Cristina; Lin, Chihung; Cecelja, Marina; Mangino, Massimo; Matey-Hernandez, Maria Luisa; Keehn, Louise; Mohney, Robert P; Steves, Claire J; Spector, Tim D; Kuo, Chang-Fu; Chowienczyk, Phil; Valdes, Ana M
• Is Part Of: European heart journal. Volume 39:Number 25(2018)
• Page Start: 2390
• Page End: 2397
• Publication Date: 2018-05-09
• Subjects: Gut microbiome diversity -- Arterial stiffness -- Microbial metabolites -- Indolepropionate -- Metabolic syndrome -- Inflammation; Cardiology -- Periodicals; Heart -- Diseases -- Periodicals; 616.12005
• DOI: 10.1093/eurheartj/ehy226
• Languages: English
• ISSNs: 0195-668X

Abstract

Abstract: Aims: The gut microbiome influences metabolic syndrome (MetS) and inflammation and is therapeutically modifiable. Arterial stiffness is poorly correlated with most traditional risk factors. Our aim was to examine whether gut microbial composition is associated with arterial stiffness. Methods and results: We assessed the correlation between carotid-femoral pulse wave velocity (PWV), a measure of arterial stiffness, and gut microbiome composition in 617 middle-aged women from the TwinsUK cohort with concurrent serum metabolomics data. Pulse wave velocity was negatively correlated with gut microbiome alpha diversity (Shannon index, Beta(SE)= −0.25(0.07), P = 1 × 10 −4 ) after adjustment for covariates. We identified seven operational taxonomic units associated with PWV after adjusting for covariates and multiple testing—two belonging to the Ruminococcaceae family. Associations between microbe abundances, microbe diversity, and PWV remained significant after adjustment for levels of gut-derived metabolites (indolepropionate, trimethylamine oxide, and phenylacetylglutamine). We linearly combined the PWV-associated gut microbiome-derived variables and found that microbiome factors explained 8.3% (95% confidence interval 4.3–12.4%) of the variance in PWV. A formal mediation analysis revealed that only a small proportion (5.51%) of the total effect of the gut microbiome on PWV was mediated by insulin resistance and visceral fat, c-reactive protein, and cardiovascular risk factors after adjusting for age, body mass index, and mean arterial pressure. Conclusions: Gut microbiome diversity is inversely associated with arterial stiffness in women. The effect of gut microbiome composition on PWV is only minimally mediated by MetS. This first human observation linking the gut microbiome to arterial stiffness suggests that targeting the microbiome may be a way to treat arterial ageing.