ArticleInternational journal of molecular sciences2026
Autotaxin Induces S1P/S1PR1 Signaling to Affect Th17/Treg Cell Balance and Exacerbate Intestinal Inflammation in Colitis.
Article in International journal of molecular sciences, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Abnormal intestinal mucosal immunity plays a crucial role in ulcerative colitis (UC). Autotaxin (ATX) can promote T cell migration and was reported to have a regulatory effect on Th17 cells, while sphingosine-1-phosphate (S1P) and its receptors (S1PRs) modulate Th17/Treg balance and inflammation, with S1PR modulators approved for UC. ATX can catalyze sphingosylphosphorylcholine (SPC) to produce S1P; however, the relationship between ATX and S1P/S1PRs in UC is unclear. Understanding the role of ATX-S1P/S1PRs in intestinal immunity can provide new treatment strategies for intestinal inflammatory diseases. Both UC patients and DSS-induced colitic mice showed significantly increased levels of ATX and S1P compared with healthy controls. ATX inhibitor PF8380 treatment led to reduced levels of S1P/S1PRs in colitic mice. Consistent with this, the S1PR antagonist etrasimod was able to alleviate ATX-induced intestinal inflammation, as well as partially restore ATX-induced Th17/Treg imbalance in MLNs and the spleen. In HT-29 and Raw246.7 cells, ATX treatment led to enhanced expression of S1P/S1PRs, with S1PR1 being the most significant. Furthermore, S1PR1 mediates the effect of ATX on Th17/Treg cell differentiation and function in vivo. Therefore, ATX affects the differentiation and function of Th17/Treg cells through S1P/S1PR1 signaling, increased ATX expression leading to Th17/Treg cell imbalance, intestinal mucosal immune dysfunction, and exacerbating intestinal inflammation.
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