Litcius/Paper detail

Lysophosphatidylserines derived from microbiota in Crohn’s disease elicit pathological Th1 response

Yuriko Otake, Hisako Kayama, Toshihiro Kishikawa, Shinichiro Shinzaki, Taku Tashiro, Takahiro Amano, Mizuki Tani, Takeo Yoshihara, Bo Li, Haruka Tani, Li Liu, Akio Hayashi, Daisuke Okuzaki, Daisuke Motooka, Shota Nakamura, Yukinori Okada, Hideki Iijima, Kiyoshi Takeda, Tetsuo Takehara

2022The Journal of Experimental Medicine40 citationsDOIOpen Access PDF

Abstract

Microbiota alteration and IFN-γ-producing CD4+ T cell overactivation are implicated in Crohn's disease (CD) pathogenesis. However, it remains unclear how dysbiosis enhances Th1 responses, leading to intestinal inflammation. Here, we identified key metabolites derived from dysbiotic microbiota that induce enhanced Th1 responses and exaggerate colitis in mouse models. Patients with CD showed elevated lysophosphatidylserine (LysoPS) concentration in their feces, accompanied by a higher relative abundance of microbiota possessing a gene encoding the phospholipid-hydrolyzing enzyme phospholipase A. LysoPS induced metabolic reprogramming, thereby eliciting aberrant effector responses in both human and mouse IFN-γ-producing CD4+ T cells. Administration of LysoPS into two mouse colitis models promoted large intestinal inflammation. LysoPS-induced aggravation of colitis was impaired in mice lacking P2ry10 and P2ry10b, and their CD4+ T cells were hyporesponsive to LysoPS. Thus, our findings elaborate on the mechanism by which metabolites elevated in patients with CD harboring dysbiotic microbiota promote Th1-mediated intestinal pathology.

Topics & Concepts

DysbiosisPathogenesisInflammationImmunologyColitisCrohn's diseaseEffectorBiologyInflammatory bowel diseaseGut floraDiseaseMedicineInternal medicineSphingolipid Metabolism and SignalingImmune Cell Function and InteractionPancreatitis Pathology and Treatment