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<p>Elevated lactate in the joint microenvironment of rheumatoid arthritis patients is crucial for disease progression, though the mechanism remains unclear. This study shows significantly increased global lactylation levels within fibroblast-like synoviocytes from RA patients compared to healthy controls, with lactylated proteins being enriched in histones. Furthermore, we find anti-lactylated histone autoantibodies present in RA patients that positively correlate with Disease Activity Score 28. Using CUT&amp;Tag and RNA-seq, we identify NFATc2 as a key target gene regulated by histone H3 lysine 9 lactylation. Functional studies reveal that NFATc2 promotes migration of RA-FLSs. Additionally, using collagen antibody-induced arthritis and collagen-induced arthritis mouse models, we demonstrate that NFATc2 exacerbates RA disease progression through enhancing the cartilage invasive function of FLS. Here, we show that upregulated target gene NFATc2 by lactate-dependent histone lactylation, can be used as a potential therapeutic target for intervention, anti-lactylated histone autoantibodies is promising as a diagnostic marker for RA.</p>

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Histone lactylation promotes rheumatoid arthritis progression by increasing NFATc2 expression and the production of anti-lactylated histone autoantibodies

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年10月10日

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  • Gan Wu,
  • Chenglin Yang,
  • Yuan Huang,
  • Bin Liu,
  • Haige Zhai,
  • Zelin Cao,
  • Siyue Lu,
  • Jijian Ji,
  • Xinyue Yin,
  • Xianming Xin,
  • Shengwei Jin,
  • Youzhi Cai,
  • Jianguang Wang

摘要

Elevated lactate in the joint microenvironment of rheumatoid arthritis patients is crucial for disease progression, though the mechanism remains unclear. This study shows significantly increased global lactylation levels within fibroblast-like synoviocytes from RA patients compared to healthy controls, with lactylated proteins being enriched in histones. Furthermore, we find anti-lactylated histone autoantibodies present in RA patients that positively correlate with Disease Activity Score 28. Using CUT&Tag and RNA-seq, we identify NFATc2 as a key target gene regulated by histone H3 lysine 9 lactylation. Functional studies reveal that NFATc2 promotes migration of RA-FLSs. Additionally, using collagen antibody-induced arthritis and collagen-induced arthritis mouse models, we demonstrate that NFATc2 exacerbates RA disease progression through enhancing the cartilage invasive function of FLS. Here, we show that upregulated target gene NFATc2 by lactate-dependent histone lactylation, can be used as a potential therapeutic target for intervention, anti-lactylated histone autoantibodies is promising as a diagnostic marker for RA.