Cooked pork-derived exosome nanovesicles mediate metabolic disorder—microRNA could be the culprit

Abstract

In this study, we extracted exosomes from cooked meat by ultra-high-speed centrifugation. Exosome had an average of size of 70.29 nm. Flow cytometry demonstrated that the positive rate of exosomal surface marker CD63 and CD81 were 84.5% and 95.9%. microRNA sequencing revealed the exosomal microRNA were differences among porcine muscle, fat and liver. The mice plasma levels of miR-1, miR-133a-3p, miR-206 and miR-99a were increase with varying degrees after drinking water with exosomes. GTT and ITT suggest that abnormal glucose metabolism and insulin resistance in mice. Moreover, the lipid droplets were significant increased in the liver were also observed. Transcriptome analysis identified 446 differentially expressed genes in liver. Functional enrichment analysis found that metabolic pathway were most significantly enriched. microRNA may function as a critical regulator involved in the metabolic disorder of mice. This study suggests that the exosomal microRNAs from meat products has the potential to adversely affect health.