ArticleCell biology and toxicology2025
m6A-mediated silencing of RNF41 by METTL3/YTHDC1 disrupts autophagy to drive intervertebral disc degeneration.
Article in Cell biology and toxicology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
- Epigenetic research methods and animal models for intervertebral disc degeneration (Review).Molecular medicine reports · 2026Review
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7 authors.
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Abstract
backgroundIntervertebral disc (IVD) degeneration (IDD) represents a predominant origin of low back pain and disability, yet current therapeutic interventions remain suboptimal. Emerging evidence highlights autophagy activation as a therapeutic strategy against IDD. This study investigates the mechanistic interplay between N6-methyladenosine (m6A) modifications and autophagy dysregulation in IDD pathogenesis.
methodsBioinformatics analysis identified ring finger protein 41 (RNF41) as a key autophagy-IDD intersection gene. Functional validation utilized tert-butyl hydroperoxide (TBHP)-treated human nucleus pulposus (NP) cells to assess RNF41's effects on senescence (CDKN2A), autophagy (LC3-II/p62), apoptosis (TUNEL), inflammation (IL-18/IL-1β), and extracellular matrix (ECM) homeostasis (aggrecan/MMP). Key m6A regulators modulating autophagy were screened via correlation analysis. In vivo validation employed adeno-associated virus (AAV)-mediated methyltransferase-like 3 (METTL3)/RNF41 delivery in puncture-induced IDD rat models.
resultsRNF41 expression was downregulated in human IVD tissues. Overexpression of RNF41 mitigated TBHP-induced senescence, apoptosis, activated AMPK/mTOR-mediated autophagy, suppressed inflammation, and restored ECM balance. The autophagy inhibitor chloroquine (CQ) abolished the protective effects of RNF41 overexpression on degenerative NP cells. Mechanistically, METTL3/YTHDC1 co-regulation in degenerative NP cells mediated m6A hypermethylation of RNF41 mRNA, shortening its half-life via YTHDC1-dependent decay. Intradiscal METTL3-silencing AAV attenuated puncture-induced disc loss and histopathological degeneration, whereas RNF41-silencing AVV exacerbated ECM disruption and annular disorganization.
conclusionMETTL3/YTHDC1-mediated m6A modification drives IDD progression by silencing RNF41, thereby impairing autophagy and ECM integrity. Targeting this axis offers a clinically actionable strategy to delay disc degeneration, particularly in patients with early-stage IDD. This evidence establishes RNF41's role as a theragnostic biomarker and therapeutic targe, enabling precision-guided interventional approaches.
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