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ALKBH5-YTHDF2 m6A modification axis inhibits rheumatoid arthritis progression by suppressing NLRP3

Jianwei Xiao1, Xu Cai1, Rongsheng Wang2

  • 1Department of Rheumatology and Immunology, Shenzhen Futian Hospital for Rheumatic Diseases, Shenzhen, 518000, PR China.

Biochemical and Biophysical Research Communications
|May 27, 2023
PubMed

Insights

This study reveals that NLRP3 inflammasome activation drives rheumatoid arthritis (RA) progression. Targeting NLRP3 or its regulator ALKBH5 may offer new therapeutic strategies for RA patients.

Area of Science:

  • Immunology
  • Molecular Biology
  • Rheumatology

Background:

  • Rheumatoid arthritis (RA) is a chronic autoimmune disease characterized by systemic inflammation.
  • The NLRP3 inflammasome has emerged as a key player in the pathogenesis of RA.
  • Understanding the precise molecular mechanisms underlying NLRP3 involvement in RA is crucial for developing targeted therapies.

Purpose of the Study:

  • To elucidate the specific mechanism of NLRP3 in rheumatoid arthritis.
  • To investigate the role of ALKBH5 in regulating NLRP3 expression and function in RA.
  • To explore the potential of targeting the NLRP3 pathway for RA treatment.

Main Methods:

  • Quantification of m6A levels using methylated RNA immunoprecipitation (MeRIP) kits.
  • Assessment of mRNA and protein expression via RT-qPCR and Western blotting.
  • Measurement of inflammatory cytokine levels using ELISA kits and cell proliferation using CCK-8 and EdU assays.

Main Results:

  • Elevated NLRP3 expression was observed in synovial tissues and fibroblast-like synoviocytes (FLS) from RA patients.
  • Silencing NLRP3 significantly reduced FLS proliferation and inflammatory cytokine production.
  • ALKBH5 was identified as an NLRP3-binding protein, and its silencing mimicked the effects of NLRP3 suppression; NLRP3 overexpression counteracted ALKBH5's effects.

Conclusions:

  • ALKBH5-mediated m6A modification suppresses NLRP3 mRNA levels via YTHDC2 in RA.
  • NLRP3 acts as a critical mediator in RA pathogenesis.
  • Targeting the ALKBH5/NLRP3 axis presents a promising therapeutic avenue for managing rheumatoid arthritis.
Keywords:
ALKBH5NLRP3Rheumatoid arthritisYTHDC2m6A

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