High expression of miR-22-3p in chicken hierarchical follicles promotes granulosa cell proliferation, steroidogenesis, and lipid metabolism via PTEN/PI3K/Akt/mTOR signaling pathway

PTEN公司 PI3K/AKT/mTOR通路 蛋白激酶B 生物 细胞生长 细胞生物学 信号转导 脂质代谢 RPTOR公司 化学 生物化学
作者
Xun Deng,Zifan Ning,Liang Li,Zhifu Cui,Xiaxia Du,Felix Kwame Amevor,Yaofu Tian,Gang Shu,Xiaohui Du,Xue Han,Xiaoling Zhao
出处
期刊:International Journal of Biological Macromolecules [Elsevier BV]
卷期号:253: 127415-127415 被引量:12
标识
DOI:10.1016/j.ijbiomac.2023.127415
摘要

MicroRNAs (miRNAs) are a class of RNA macromolecules that play regulatory roles in follicle development by inhibiting protein translation through binding to the 3'UTR of its target genes. Granulosa cell (GC) proliferation, steroidogenesis, and lipid metabolism have indispensable effect during folliculogenesis. In this study, we found that miR-22-3p was highly expressed in the hierarchical follicles of the chickens, which indicated that it may be involved in follicle development. The results obtained suggested that miR-22-3p promoted proliferation, hormone secretion (progesterone and estrogen), and the content of lipid droplets (LDs) in the chicken primary GC. The results from the bioinformatics analysis, luciferase reporter assay, qRT-PCR, and Western blotting, confirmed that PTEN was directly targeted to miR-22-3p. Subsequently, it was revealed that PTEN inhibited proliferation, hormone secretion, and the content of LDs in GC. Therefore, this study showed that miR-22-3p could activate PI3K/Akt/mTOR pathway via targeting PTEN. Taken together, the findings from this study indicated that miR-22-3p was highly expressed in the hierarchical follicles of chickens, which promotes GC proliferation, steroidogenesis, and lipid metabolism by repressing PTEN to activate PI3K/AKT/mTOR pathway.
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