Resveratrol modulates miRNA machinery proteins in different types of colon cancer cells

Abstract Objectives Resveratrol (RSV) is a stilbenoid compound that shows anticancer activity in many cancer cells. Exosomes might affect carcinogenesis and the development of colorectal cancer by affecting communication between tumor cells in the tumor microenvironment via their cargo content miRNA. The aim of this study is to determine the effect of RSV on the expression of Dicer, Ago2, eIf2α, CD-9, CD-63, and exosomal miRNA levels in COLO320 and COLO741 colon cancer cell lines. Methods The MTT method was used for cell growth and cytotoxicity in both COLO320 and COLO741 cell lines. Dicer, Ago2, eIF2α, CD-9, and CD-63 antibodies were used for the immunocytochemical evaluation. Total miRNA analysis was performed using a miRCURY Exosome Isolation Kit. Results As a result of immunocytochemical staining, increased CD-63 immunoreactivity was observed in RSV-treated COLO320 cells vs. RSV-treated COLO-741 cells. Dicer immunoreactivity increased after the RSV treatment in COLO320 cells. Higher eIF2α immunoreactivity was observed in RSV-treated COLO741 cells compared to both COLO741 control cells and RSV-treated COLO320 cells. Non-significant decreases were observed in miRNA concentration in RSV-treated COLO320 and COLO741 cells compared to control group cells. Conclusions RSV could increase miRNA biogenesis in COLO320 cancer cells and decrease it in COLO741 cancer cells.