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Autophagy and Apoptosis of Porcine Ovarian Granulosa Cells During Follicular Development

文献类型： 外文期刊

作者： Zheng, Yuxin 1 ; Ma, Lizhu 1 ; Liu, Ning 1 ; Tang, Xiaorong 1 ; Guo, Shun 1 ; Zhang, Bin 2 ; Jiang, Zhongliang 1 ;

作者机构： 1.Northwest Agr & Forestry Univ, Coll Anim Sci & Technol, Yangling 712100, Shaanxi, Peoples R China

2.Xinjiang Acad Agr & Reclamat Sci, Coll Anim Sci & Technol, State Key Lab Sheep Genet Improvement & Hlth Prod, Shihezi 832000, Peoples R China

关键词： granulosa cells; follicular size; follicular atresia; autophagy; apoptosis

期刊名称：ANIMALS （ 影响因子：2.752； 五年影响因子：2.942 ）

ISSN： 2076-2615

年卷期： 2019 年 9 卷 12 期

页码：

收录情况： SCI

摘要： Simple Summary Granulosa cells (GCs) provide nutrients and information for oocytes in porcine follicles. Follicular atresia is closely related to both apoptosis and autophagy of granulosa cells in ovarian follicles; however, the follicular stages of granulosa cell apoptosis or autophagy during follicular development or atresia are poorly understood. We found that autophagy and apoptosis of GCs occurred in GCs from different size follicles during follicular development, and autophagy was mainly found in GCs of medium follicles, while apoptosis was mainly found in GCs of large follicles. These data provided some useful information to understand follicular atresia which is related to the fertility of sows. Abstract Follicular atresia is closely related to both apoptosis and autophagy of granulosa cells (GCs) in ovarian follicles. In the present study, GCs were isolated from pig ovaries in small, medium and large antral follicles, and the current results showed that the proliferation of GCs was higher in medium follicles, and lower in large follicles compared to small follicles. The Bax and Caspase 3 mRNA levels were significantly higher, but the ratio of Bcl-2/Bax was lower in GCs of large follicles. The marker genes of autophagy, Atg3, Atg7 and LC3 mRNA levels were higher in GCs from medium follicles. Apoptosis- and autophagy-related proteins had a similar expression pattern to the mRNA level. Our results showed that phosphorylated ERK (p-ERK) was activated in GCs of large follicles, while phosphorylated AKT (p-AKT) and phosphorylated mTOR (p-mTOR) were inhibited in GCs of medium follicles. Labeling of autophagic vesicles with 4',6-diamidino-2-phenylindole (DAPI) and monodansylcadaverine (MDC) confirmed the results of gene transcription and protein expression in GCs of different size follicles. We conclude that autophagy and apoptosis of GCs occurred in different size follicles during follicular development, and autophagy was mainly found in GCs of medium follicles, while apoptosis was mainly found in GCs of large follicles.

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