Effects of Dietary Fiber and Acetate on Alcoholic Heart Disease and Intestinal Microbes in Mice

Alcoholic heart disease (AHD) is a severe cardiovascular condition linked to chronic alcohol consumption. This study investigates the effects of a high-fiber diet and acetate on gut microbiota and cardiac function in AHD mouse models. Sixty male C57BL/6 mice were divided into six groups, receiving either a control diet, high-fiber diet, or acetate supplementation alongside alcohol treatment. Results revealed that cardiac fibrosis and heart failure were notably improved in the AHD mice receiving high-fiber or acetate diets. Transcriptomic analyses indicated that dietary interventions modulated the expression of genes involved in lipid metabolism and the TGF-β signaling pathway. Additionally, 16S rRNA sequencing showed that the high-fiber diet and acetate altered gut microbiota composition, enhancing the abundance of beneficial bacteria such as Akkermansia muciniphila, Lactobacillus intestinalis, and Bacteroides acidifaciens. These microbes exhibited positive correlations with genes related to fat metabolism and TGF-β signaling, suggesting a potential mechanism for gut microbiota's role in AHD pathology. ROC analysis identified these bacteria as promising biomarkers for AHD detection. Overall, our findings underscore the therapeutic potential of dietary fiber and acetate in modulating gut microbiota and improving cardiac function in AHD, highlighting the intricate relationship between gut health and cardiovascular disease management.