miR-484 mediates oxidative stress-induced ovarian dysfunction and promotes granulosa cell apoptosis via SESN2 downregulation

• Published in: Redox biology Vol. 62; p. 102684
• Main Authors: Wang, Xiaofei, Yang, Jiahao, Li, Huiying, Mu, Hongbei, Zeng, Ling, Cai, Siying, Su, Ping, Li, Huaibiao, Zhang, Ling, Xiang, Wenpei
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier B.V 01.06.2023; Elsevier
• Subjects: Animals; Apoptosis; Apoptosis - genetics; Down-Regulation; Female; Granulosa cells; Granulosa Cells - metabolism; Mice; MicroRNAs - genetics; MicroRNAs - metabolism; miR-484; Mitochondria; Ovarian Diseases; Ovarian dysfunction; Oxidative Stress; Research Paper; Oxidative stress; Mitochondria; Ovarian dysfunction; OS; miR-484; GCs; ROS; Granulosa cells; 3-NP; Apoptosis
• ISSN: 2213-2317; 2213-2317
• DOI: 10.1016/j.redox.2023.102684

Ovarian dysfunction is a common cause of female infertility, which is associated with genetic, autoimmune and environmental factors. Granulosa cells (GCs) constitute the largest cell population of ovarian follicles. Changes in GCs, including oxidative stress (OS) and excessive reactive oxygen species (ROS), are involved in regulating ovary function. miR-484 is highly expressed in 3-NP-induced oxidative stress models of ovaries and GCs. miR-484 overexpression aggravated GCs dysfunction and thereby intensified ovarian oxidative stress injury in mice. Moreover, bioinformatic analyses, luciferase assays and pull-down assays indicated that LINC00958 acted as a competing endogenous RNA (ceRNA) for miR-484 and formed a signaling axis with Sestrin2(SESN2) under oxidative stress conditions, which in turn regulated mitochondrial functions and mitochondrial-related apoptosis in GCs. Additionally, the inhibition of miR-484 alleviated GCs dysfunction under ovarian oxidative stress condition. Our present study revealed the role of miR-484 in oxidative stress of ovaries and GCs and the function of LINC00958/miR-484/SESN2 axis in mitochondrial function and mitochondria-related apoptosis. [Display omitted] •miR-484 is highly expressed in oxidative stress-induced ovaries and GCs.•miR-484 overexpression aggravated GCs dysfunction and intensified ovarian oxidative stress injury.•LINC00958/miR-484/SESN2 axis regulate mitochondrial function and mediate the mitochondrial-related apoptosis in GCs.•The inhibition of miR-484 alleviated GCs dysfunction under ovarian oxidative stress condition.