Abstract
DNA methylation and long noncoding RNAs (lncRNAs) exhibit an indispensable role in follicular development. However, the specific mechanisms regarding lncRNAs mediated by DNA methylation in follicular development remain unclearly. In this study, we found that inhibiting the expression of DNMT1 promoted granulosa cells (GCs) apoptosis to inhibit follicular development. A novel follicular development-associated lncRNA named inhibitory factor of follicular development (IFFD) was mediated by DNMT1 and showed to arrest follicular development by inhibiting GCs proliferation and estrogen (E2) secretion but promoting GCs apoptosis. Mechanistically, the deactivated Cas9-TET1 demonstrated that the hypomethylation in −1261/−1254 region of IFFD promoted the transcription of IFFD by recruiting SP1. IFFD induced the expression of GLI family zinc finger 1 through competitive binding miR-370, thereby up-regulating the expression of CASP3 to promote GCs apoptosis, as well as downregulating the expressions of PCNA and CYP19A1 to inhibit GCs proliferation and E2 secretion. Collectively, DNMT1-mediated IFFD might be a novel target for the regulation of follicular development.
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Data availability
The RNA-seq data supporting the results of this study have been deposited in the NCBI BioProject database under accession number PRJNA906921.
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Acknowledgements
This project was supported by the earmarked fund for China Agriculture Research System (CARS-35), the National Natural Science Foundation of China (32072694), the Guangdong Basic and Applied Basic Research Foundation (2021A1515012396), and the Science and Technology Project of Guangzhou (202002030071).
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XZ, ZZ, HZ, JL, and XY conceived the study. XZ, YH, GB, HQ, and YL conducted in vivo experiments. XZ, YH, BH, and NL conducted in vitro experiments. XZ and XP conducted the RNA-seq data analysis. XZ summarized results and wrote the manuscript.
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All experiments were conducted with strict reference to the Regulations for Administration of Affairs Concerning Experimental Animals, and approved by the Animal Care and Use Committee of South China Agricultural University with approval number: SYXK 2019-0136.
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Zhou, X., He, Y., Pan, X. et al. DNMT1-mediated lncRNA IFFD controls the follicular development via targeting GLI1 by sponging miR-370. Cell Death Differ 30, 576–588 (2023). https://doi.org/10.1038/s41418-022-01103-y
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DOI: https://doi.org/10.1038/s41418-022-01103-y