Resveratrol Inhibits Hepatocellular Carcinoma Progression through Regulating Exosome Secretion.

ABSTRACT

BACKGROUND AND OBJECTIVES: Resveratrol is a promising drug for tumor therapy, but its anti-tumor mechanism remains unclarified. The present study aimed to explore the effect of resveratrol on the secretion of exosomes and the role of resveratrol-induced exosomes in the progression of hepatocellular carcinoma. METHODS: The number and contents of exosomes induced by resveratrol were determined by nanoparticle tracking analysis and high-throughput sequencing in Huh7 cells, respectively. Expression of Rab27a was assessed by western blotting and immunofluorescence. Cell proliferation, migration and epithelial-mesenchymal transition were examined with the stimuli of resveratrol and exosomes, the activity of autophagy and wnt/ß-catenin signaling induced by resveratrol-induced exosomes and knockdown of lncRNA SNHG29 were monitored by western blotting and immunofluorescence. RESULTS: It was found that resveratrol might inhibit the exosome secretion by down-regulating the expression of Rab27a, thereby suppressing the proliferation, migration and epithelial-mesenchymal transition of Huh7 cells. Moreover, resveratrol-induced exosomes could also inhibit the malignant phenotype of Huh7 cells via inhibiting the nuclear translocation of ß-catenin and the activation of autophagy, which lncRNA SNHG29 might mediate. CONCLUSION: Resveratrol inhibits hepatocellular carcinoma progression by regulating exosome secretion and contents.