miR-346 functions as a pro-survival factor under ER stress by activating mitophagy

Stress in the endoplasmic reticulum (ER) triggers the unfolded protein response (UPR), which attempts to restore normal function of the ER. Both autophagy and miRNAs have been reported to participate in the process of ER stress, but the relationship between these two factors is still obscure. In this study, we demonstrated that miR-346, which was induced under ER stress, modulated autophagic flux in HeLa cells. By regulating the process of autophagy, miR-346 reduced the ROS level in the cells, thus protecting them from death following ER stress.

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