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TCF3 Induces DNMT1 Expression to Regulate Wnt Signaling Pathway in Glioma

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Abstract

The epigenetic alteration is widely understood as the key to cancer initiation. Herein, we intended to clarify the role of transcription factor 3 (TCF3) in the development of glioma and the behind epigenetic mechanism. Through bioinformatics analysis, we identified a TCF3-DNA methyltransferase 1 (DNMT1)-secreted frizzled related protein 1 (SFRP1) axis which was differentially expressed and interacted in gliomas. More specifically, TCF3 activated DNMT1 transcription, and DNMT1 repressed SFRP1 expression. TCF3 and DNMT1 were overexpressed, while SFRP1 was downregulated in glioma. Functionally, TCF3 silencing inhibited cell proliferation and migration, and promoted apoptosis, which were reversed by DNMT1. SFRP1 inhibited the tumor supporting effects of DNMT1 on glioma cells. Moreover, TCF3 downregulation or SFRP1 overexpression inhibited tumorigenesis and enhanced apoptosis of glioma cells, while DNMT1 enhanced tumorigenesis and repressed apoptosis in tumor tissues in vivo. The Wnt pathway was a downstream effector of the TCF3-DNMT1-SFRP1 axis. Collectively, this study determined a novel therapeutic target TCF3 for glioma from the perspective of epigenetic alteration via regulation of SFRP1 expression in a DNMT1-dependent manner.

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Funding

This work was supported by Doctor Start-up Fund (No. BSQDJ0130), Provincial Discipline Leader Class C (No. DTRC18018) and Stereotactic Brain Electrode Placement and EEG Detection in Patients With Refractory Epilepsy (No. FCJS202040).

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Correspondence to Bo Yu.

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Zeng, W., Jiang, H., Wang, Y. et al. TCF3 Induces DNMT1 Expression to Regulate Wnt Signaling Pathway in Glioma. Neurotox Res 40, 721–732 (2022). https://doi.org/10.1007/s12640-022-00510-w

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  • DOI: https://doi.org/10.1007/s12640-022-00510-w

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