METTL3 promotes cellular senescence of colorectal cancer via modulation of CDKN2B transcription and mRNA stability
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View abstract on PubMed
Summary
This summary is machine-generated.METTL3 promotes colorectal cancer (CRC) cell senescence by stabilizing CDKN2B mRNA. Inhibiting METTL3 or CDKN2B methylation suppresses CRC senescence, offering potential therapeutic targets.
Area Of Science
- Oncology
- Molecular Biology
- Epigenetics
Background
- Cellular senescence is crucial in cancer, but its mechanisms in colorectal cancer (CRC) are unclear.
- Replicative senescent CRC cells show elevated N6-methyladenosine (m6A) levels and METTL3 expression.
Purpose Of The Study
- To elucidate the role of METTL3 and m6A modification in CRC cell senescence.
- To identify mediators of METTL3-regulated senescence in CRC.
Main Methods
- m6A-sequencing
- Functional studies including METTL3 knockdown
- Analysis of CDKN2B mRNA stability and E2F1-promoter interactions
Main Results
- METTL3 knockdown reversed the senescence-associated secretory phenotype (SASP) in CRC cells.
- CDKN2B (p15INK4B) acts as a mediator; m6A modification at CDKN2B CDS A413 enhances mRNA stability via IGF2BP3.
- METTL3-mediated E2F1 stabilization promotes CDKN2B transcription, thus inducing senescence.
Conclusions
- The METTL3/CDKN2B axis drives CRC cell senescence, influencing M2 macrophage polarization.
- Targeting METTL3 or CDKN2B methylation presents a novel therapeutic strategy for CRC.
- This study expands understanding of mRNA methylation in cellular senescence and CRC progression.
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