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Plasma-derived exosomal miRNA profiles reveal potential epigenetic pathogenesis of premature ovarian failure

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Abstract

The role of plasma-derived exosomal miRNA in premature ovarian failure (POF) remains unclear. This study aimed to investigate the epigenetic pathogenesis of POF through exosomal miRNA sequencing. Exosomes were isolated and characterized from six POF patients and four healthy individuals using nanoparticle tracking analysis, transmission electron microscopy and western blot analysis. Exosomal miRNA sequencing was performed to identify differentially expressed miRNAs with |fold change| greater than 1.5 and p value less than 0.05. Bioinformatics analysis in GSE39501 dataset and our sequencing data was conducted to investigate underlying mechanisms of POF. The functional role of hsa-miR-19b-3p was assessed using CCK8, western blot, flow cytometry and fluorescence staining. The regulatory effect of hsa-miR-19b-3p on BMPR2 was investigated through miRNA transfection, qPCR analysis, and luciferase reporter assay. Statistical significance was determined using t-tests and one-way ANOVA (p < 0.05). Exosomal miRNA sequencing revealed 18 dysregulated miRNAs in POF patients compared to healthy controls. Functional enrichment analysis demonstrated their involvement in cell growth, oocyte meiosis and PI3K-Akt signaling pathways. Moreover, the constructed miRNA–mRNA network unveiled potential regulatory mechanisms underlying POF, particularly implicating hsa-miR-19b-3p in the regulation of BMPR2. In vitro assays conducted on KGN cells confirmed that hsa-miR-19b-3p promoted apoptosis, as evidenced by reduced cell viability, decayed mitochondrial membrane potential and increased apoptotic rate, thereby supporting its role in POF. Notably, hsa-miR-19b-3p was found to significantly downregulate BMPR2 expression via targeting its 3′UTR, while co-expression analysis revealed strong associations between BMPR2 and POF-related processes. This study sheds light on the epigenetic pathogenesis of POF by investigating exosomal miRNA profiles. Particularly, hsa-miR-19b-3p emerged as a potential regulator of BMPR2 and demonstrated its functional significance in POF through modulation of apoptosis.

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Availability of data and materials

The sequencing data utilized in this study are accessible through online repositories named NCBI GEO, with the accession number GSE229434. The token number for accessing data is: irgpquamjvulhev.

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Acknowledgements

We acknowledge the GEO researchers for sharing the data.

Funding

This work was supported by Guangdong Basic and Applied Basic Research Foundation (2022A1515111203, 2022A1515012621, 2020B1515120009), National Key S&T Special Projects (2021YFC100530, 2022YFC2703303), National Natural Science Foundation of China (32170617, 31970558), and Foshan Science and Technology project (2020001003953).

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Contributions

JQL analyzed the data and wrote the manuscript. ZHW assisted with the data analysis. YCZ and ZRS performed the experiment. ZZG and SFM collected the samples. YHL and FX provided ideas and reviewed the manuscript. All the authors contributed to this article and determined the final version.

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Correspondence to Yanhui Liu or Fu **ong.

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All the authors declare no conflicts of interest.

Ethical approval and consent to participate

Approval for the recruitment of participants and sample collection in our research was obtained from the institutional ethics review board of Dongguan Maternal and Child Health Care Hospital and consent to participate was signed by the participants.

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Fig. S1

Hsa-miR-19b-3p inhibited the expression of BMPR2. (a) qPCR analysis of BMPR2 expression in miRNA negative control (NC mimics) and hsa-miR-19b-3p mimics (miR-19b mimics) group in HEK-293T cells. (c) The relative luciferase activity in NC mimics and miR-19b mimics group in HEK-293T cells. *p < 0.05.***p < 0.001. Supplementary file1 (TIF 339 KB)

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Lin, J., Wu, Z., Zheng, Y. et al. Plasma-derived exosomal miRNA profiles reveal potential epigenetic pathogenesis of premature ovarian failure. Hum. Genet. (2023). https://doi.org/10.1007/s00439-023-02618-1

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  • DOI: https://doi.org/10.1007/s00439-023-02618-1

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