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Expression and Clinical Significance of HIF-1α in Follicular Fluid and Granulosa Cells in Infertile PCOS Patients

  • Reproductive Endocrinology: Original Article
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Abstract

The present study aimed to determine the clinical predictive significance of HIF-1α in follicular development and assisted reproductive technology (ART). We collected follicular fluid (FF) and granulosa cells (GCs) from PCOS (polycystic ovary syndrome) patients (experimental group) and other patients who were infertile due to tubal factors or male factors (control group) with IVF/ICSI-ET. The localization and expression of HIF-1α in GCs were determined by immunofluorescence staining. HIF-1α protein and mRNA expression were detected by enzyme-linked immunosorbent assay and quantitative real-time PCR, respectively. To clarify the regulation of HIF-1α by TGF-β1, we added the HIF-1α-specific blocker YC-1 to GCs. The serum AMH, LH, LH/FSH, testosterone, BMI and the number of oocytes retrieved in the PCOS group were significantly higher, while the cleavage rate was significantly lower, than those in the control group. HIF-1α protein was expressed in the cytoplasm of GCs. The expression of HIF-1α protein in the FF of the PCOS group was significantly lower than that in the control group. However, the expression of HIF-1α protein in GCs between the two groups was not significantly different. HIF-1α protein was highly expressed in large FF (follicular diameter ≥ 14 mm). Compared with the control group, the expression of HIF-1α mRNA in GCs of the PCOS group was significantly lower. The results showed a significant positive correlation between HIF-1α and TGF-β1 expression. We found that both HIF-1α and TGF-β1 were involved in the development of PCOS follicular development. The mutual regulation of HIF-1α and TGF-β1 may be one of the important mechanisms of the occurrence and development of PCOS.

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Data Availability

The datasets used and/or analysed during the current study are available from the corresponding author on reasonable request.

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Acknowledgements

We would like to thank the whole ART laboratory staffs for their patient assistance in the sample collection.

Funding

This study was supported by grants from Shanghai Municipal Health Commission Project (ZYKC2019036), the Shanghai Municipal Science and Technology Major Project (2021SHZDZX0100) and the Fundamental Research Funds for the Central Universities.

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Authors

Contributions

Fu Xiayan wrote the manuscript; Lihong Shi, Ping Liu and Yufan Jiao collected the data; Yanqiu Wang, Qihchang Zheng and Xiangyun Chen designed the current study; and Shana Guo and Qizhen Chen participated in the revision of the manuscript. All the authors have read and agreed to the published version of the manuscript.

Corresponding author

Correspondence to Yanqiu Wang.

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Ethics Approval

This study was approved by the Ethics Committee of Tongji Hospital affiliated to Tongji University (approve ID K-W-2019–007) and informed consent was obtained from all the participants. All the authors have given approval to the final version of the manuscript.

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The authors declare no competing interests.

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Xiayan Fu, Lihong Shi, and Ping Liu are Co-First authors.

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Fu, X., Shi, L., Liu, P. et al. Expression and Clinical Significance of HIF-1α in Follicular Fluid and Granulosa Cells in Infertile PCOS Patients. Reprod. Sci. 30, 2263–2274 (2023). https://doi.org/10.1007/s43032-022-01135-2

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