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<p>Type 3 immunity underlies both pain and inflammation in axial spondyloarthritis (axSpA), with IL-17A-producing cells such as T-helper 17 cells (T<sub>H</sub>17) being pathogenic mediators. In contrast, the role regulatory T cells (Tregs) have in maintaining immune homeostasis in axSpA remains poorly defined. Although understudied, emerging research suggests three plausible hypotheses: 1) Tregs in axSpA could be functional but are turned off in response to external signals. 2) Tregs in axSpA have deficiencies that result in reduced suppressive capabilities or stability. 3) Tregs directly contribute to autoimmunity through cytotoxicity. These hypotheses are further examined across gut, skin and joint to contextualize extra-articular manifestations and disease heterogeneity. This framework highlights critical gaps in current knowledge and identifies actionable pathways for translating Treg biology into novel therapeutic strategies.</p>

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Regulatory T cells in axial spondyloarthritis

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年3月31日

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  • Addison Pacheco,
  • Fataneh Tavasolian,
  • Melissa Lim,
  • Robert D. Inman

摘要

Type 3 immunity underlies both pain and inflammation in axial spondyloarthritis (axSpA), with IL-17A-producing cells such as T-helper 17 cells (TH17) being pathogenic mediators. In contrast, the role regulatory T cells (Tregs) have in maintaining immune homeostasis in axSpA remains poorly defined. Although understudied, emerging research suggests three plausible hypotheses: 1) Tregs in axSpA could be functional but are turned off in response to external signals. 2) Tregs in axSpA have deficiencies that result in reduced suppressive capabilities or stability. 3) Tregs directly contribute to autoimmunity through cytotoxicity. These hypotheses are further examined across gut, skin and joint to contextualize extra-articular manifestations and disease heterogeneity. This framework highlights critical gaps in current knowledge and identifies actionable pathways for translating Treg biology into novel therapeutic strategies.