Aiwen Jiang, Jialong Li, Luyao Wang, Yi Liu, Zhengchang Wu, Haifei Wang, Shenglong Wu, Wenbin Bao
{"title":"HIF1A通过o - glcn酰化介导的猪颗粒细胞VEZF1/ET-1/FOXO1/BAX信号通路调控卵泡闭锁","authors":"Aiwen Jiang, Jialong Li, Luyao Wang, Yi Liu, Zhengchang Wu, Haifei Wang, Shenglong Wu, Wenbin Bao","doi":"10.1186/s40104-025-01263-0","DOIUrl":null,"url":null,"abstract":"Hypoxic stimuli induce follicular atresia by regulating granulosa cell (GC) apoptosis. Notably, mature follicles can still develop and ovulate under hypoxic conditions, highlighting the importance of the hypoxic adaptation in ovarian follicular selection. To date, the role and mechanism of hypoxia‐inducible factor 1 subunit alpha (HIF1A)-mediated hypoxic responses in follicular atresia are unclear. This study aimed to investigate whether and how HIF1A regulates follicular atresia via the modulation of O-linked N-acetylglucosamine (O-GlcNAc) protein modification (O-GlcNAcylation). Our findings revealed that HIF1A was highly expressed in pig ovaries. Compared with that in healthy follicles, its expression was significantly downregulated in atretic follicles. Under hypoxic conditions, pharmacological inhibition or siRNA-mediated knockdown of HIF1A increased porcine GC apoptosis. Mechanistically, HIF1A knockdown Suppressed O-GlcNAc transferase degradation, leading to increased global O-GlcNAcylation. Using 4D label-free quantitative proteomics, we identified 53 O-GlcNAcylated proteins. Importantly, O-GlcNAcylation stabilized vascular endothelial zinc finger 1 (VEZF1), and HIF1A knockdown upregulated VEZF1 protein levels by promoting O-GlcNAcylation. The HIF1A-VEZF1 axis modulates forkhead box O1 (FOXO1) expression by regulating endothelin-1. As a transcription factor, FOXO1 directly binds to the Bcl-2 associated X (BAX) promoter, activating its transcription and ultimately inducing porcine GC apoptosis and follicular atresia. Overall, our study elucidates a novel molecular mechanism by which HIF1A deficiency modulates follicular atresia through O-GlcNAcylation-mediated VEZF1 expression. These results not only clarify the molecular mechanism of ovarian follicular development under hypoxic conditions but also offer potential targets for improving follicular selection efficiency in pig breeding.","PeriodicalId":14928,"journal":{"name":"Journal of Animal Science and Biotechnology","volume":"73 1","pages":""},"PeriodicalIF":6.5000,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"HIF1A regulates follicular atresia through O-GlcNAcylation-mediated VEZF1/ET-1/FOXO1/BAX signaling in porcine granulosa cells\",\"authors\":\"Aiwen Jiang, Jialong Li, Luyao Wang, Yi Liu, Zhengchang Wu, Haifei Wang, Shenglong Wu, Wenbin Bao\",\"doi\":\"10.1186/s40104-025-01263-0\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Hypoxic stimuli induce follicular atresia by regulating granulosa cell (GC) apoptosis. Notably, mature follicles can still develop and ovulate under hypoxic conditions, highlighting the importance of the hypoxic adaptation in ovarian follicular selection. To date, the role and mechanism of hypoxia‐inducible factor 1 subunit alpha (HIF1A)-mediated hypoxic responses in follicular atresia are unclear. This study aimed to investigate whether and how HIF1A regulates follicular atresia via the modulation of O-linked N-acetylglucosamine (O-GlcNAc) protein modification (O-GlcNAcylation). Our findings revealed that HIF1A was highly expressed in pig ovaries. Compared with that in healthy follicles, its expression was significantly downregulated in atretic follicles. Under hypoxic conditions, pharmacological inhibition or siRNA-mediated knockdown of HIF1A increased porcine GC apoptosis. Mechanistically, HIF1A knockdown Suppressed O-GlcNAc transferase degradation, leading to increased global O-GlcNAcylation. Using 4D label-free quantitative proteomics, we identified 53 O-GlcNAcylated proteins. Importantly, O-GlcNAcylation stabilized vascular endothelial zinc finger 1 (VEZF1), and HIF1A knockdown upregulated VEZF1 protein levels by promoting O-GlcNAcylation. The HIF1A-VEZF1 axis modulates forkhead box O1 (FOXO1) expression by regulating endothelin-1. As a transcription factor, FOXO1 directly binds to the Bcl-2 associated X (BAX) promoter, activating its transcription and ultimately inducing porcine GC apoptosis and follicular atresia. Overall, our study elucidates a novel molecular mechanism by which HIF1A deficiency modulates follicular atresia through O-GlcNAcylation-mediated VEZF1 expression. These results not only clarify the molecular mechanism of ovarian follicular development under hypoxic conditions but also offer potential targets for improving follicular selection efficiency in pig breeding.\",\"PeriodicalId\":14928,\"journal\":{\"name\":\"Journal of Animal Science and Biotechnology\",\"volume\":\"73 1\",\"pages\":\"\"},\"PeriodicalIF\":6.5000,\"publicationDate\":\"2025-09-20\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Animal Science and Biotechnology\",\"FirstCategoryId\":\"97\",\"ListUrlMain\":\"https://doi.org/10.1186/s40104-025-01263-0\",\"RegionNum\":1,\"RegionCategory\":\"农林科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"Agricultural and Biological Sciences\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Animal Science and Biotechnology","FirstCategoryId":"97","ListUrlMain":"https://doi.org/10.1186/s40104-025-01263-0","RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"Agricultural and Biological Sciences","Score":null,"Total":0}
HIF1A regulates follicular atresia through O-GlcNAcylation-mediated VEZF1/ET-1/FOXO1/BAX signaling in porcine granulosa cells
Hypoxic stimuli induce follicular atresia by regulating granulosa cell (GC) apoptosis. Notably, mature follicles can still develop and ovulate under hypoxic conditions, highlighting the importance of the hypoxic adaptation in ovarian follicular selection. To date, the role and mechanism of hypoxia‐inducible factor 1 subunit alpha (HIF1A)-mediated hypoxic responses in follicular atresia are unclear. This study aimed to investigate whether and how HIF1A regulates follicular atresia via the modulation of O-linked N-acetylglucosamine (O-GlcNAc) protein modification (O-GlcNAcylation). Our findings revealed that HIF1A was highly expressed in pig ovaries. Compared with that in healthy follicles, its expression was significantly downregulated in atretic follicles. Under hypoxic conditions, pharmacological inhibition or siRNA-mediated knockdown of HIF1A increased porcine GC apoptosis. Mechanistically, HIF1A knockdown Suppressed O-GlcNAc transferase degradation, leading to increased global O-GlcNAcylation. Using 4D label-free quantitative proteomics, we identified 53 O-GlcNAcylated proteins. Importantly, O-GlcNAcylation stabilized vascular endothelial zinc finger 1 (VEZF1), and HIF1A knockdown upregulated VEZF1 protein levels by promoting O-GlcNAcylation. The HIF1A-VEZF1 axis modulates forkhead box O1 (FOXO1) expression by regulating endothelin-1. As a transcription factor, FOXO1 directly binds to the Bcl-2 associated X (BAX) promoter, activating its transcription and ultimately inducing porcine GC apoptosis and follicular atresia. Overall, our study elucidates a novel molecular mechanism by which HIF1A deficiency modulates follicular atresia through O-GlcNAcylation-mediated VEZF1 expression. These results not only clarify the molecular mechanism of ovarian follicular development under hypoxic conditions but also offer potential targets for improving follicular selection efficiency in pig breeding.
期刊介绍:
Journal of Animal Science and Biotechnology is an open access, peer-reviewed journal that encompasses all aspects of animal science and biotechnology. That includes domestic animal production, animal genetics and breeding, animal reproduction and physiology, animal nutrition and biochemistry, feed processing technology and bioevaluation, animal biotechnology, and meat science.