TLR4 and infarction: demonstrated that miR-93-5p-enhanced Exo-ASCs had better protective effects on infarction-induced myocardial damage than natural exosome treatment had, whereas in vitro results showed that miR-93-5p could exert an inhibiting effect on hypoxia-induced autophagy and inflammatory cytokine expression by acting on autophagy-related gene 7 (Atg7) and Toll-like receptor 4 (TLR4), respectively.117