Abstract
To study the effect and mechanism of miR-375 enriched in BMSC exosomes on prostate cancer (PC) cells. Bioinformatics assessed the potential regulatory miRNA of TFF3 and miR-375 level in breast cancer cells and breast cancer clinical samples was detected by PCR. Dual luciferase assay validated the relationship between TFF3 and miR-375. miR-375 mimics or sh-TFF3 was transfected into PC cells, followed by measuring miR-375 and TFF3 by PCR and Western-blot. Cell proliferation, invasion, migration and apoptosis by Edu staining, transwell and flow cytometry. The BMSC exosomes were then isolated and co-cultured with PC cells to detect cell proliferation and invasion. PC cells and tissues showed the expression of miR-375 was decreased, indicated that miR-375 specifically inhibited TFF3 level. miR-375 was enriched in MSC-derived exosomes and could be transferred to PC cells. miR-375 mimics, exosome miR-375 or silenced TFF3 inhibited TFF3 level, up-regulated PCNA, MMP-2/9 expression, thereby inhibiting cell proliferation and metastasis, and promoting cell apoptosis. miR-375 is enriched in BMSC exosomes and inhibits PC cell migration and invasion by reducing TFF3.
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