METTL3-mediated m(6)A modification of DNMT1 enhances ovarian cancer progression.

METTL3-driven m6A deposition enhances DNMT1 translation, and METTL3 suppression reduces DNMT1 abundance, impairing proliferation and tumor progression in high-grade serous ovarian carcinoma.

• Why it matters: HGSOC is frequently detected at advanced stages with poor outcomes, and the field needs mechanistic targets linking RNA methylation to tumor-promoting epigenetic maintenance.
• What they did: The study used genetic and pharmacological METTL3 suppression, then tested effects on ovarian cancer growth and tumor progression, alongside mechanistic assays for m6A deposition, DNMT1 translation, and DNA methylation.
• The result: DNMT1 inhibition caused widespread DNA hypomethylation and increased TNFAIP3 and FBXO32, and METTL3 suppression similarly derepressed these tumor suppressors, suggesting an m6A–METTL3–DNMT1 therapeutic vulnerability in HGSOC.

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