Chunpan Zhang1,2, Hua Jin1,3,4,5, Yan Wang2, Changying Li1,3,4,5, Xinyan Zhao2, Yanmeng Li3, Wen Shi1,3,4,5, Yue Tian1,3,4,5, Hufeng Xu1,3,4,5, Dan Tian1,3,4,5, Kai Liu1,3,4,5, Jidong Jia2,6, Guangyong Sun1,3,4,5, Dong Zhang1,3,4,5,6,7. 1. General Surgery Department, Beijing Friendship Hospital, Capital Medical University, Beijing, China. 2. Liver Research Center, Beijing Friendship Hospital, Capital Medical University, Beijing, China. 3. Experimental and Translational Research Center, Beijing Friendship Hospital, Capital Medical University, Beijing, China. 4. Immunology Research Center, Beijing Clinical Research Institute, Beijing, China. 5. Beijing Key Laboratory of Tolerance Induction and Organ Protection in Transplantation, Beijing Friendship Hospital, Beijing, China. 6. National Clinical Research Center for Digestive Diseases, Beijing Friendship Hospital, Beijing, China. 7. Immunology Research Center for Oral and Systemic Health, Beijing Friendship Hospital, Capital Medical University, Beijing, China.
Abstract
BACKGROUND AND PURPOSE: The innate and adaptive immune systems both play important roles in drug-induced liver injury (DILI). However, the crosstalk between the innate and adaptive immunity in DILI is largely unknown. Extensive crosstalk is likely mandated by co-stimulatory interactions between these immune systems. OX40 is a co-stimulatory molecule, but whether it regulates the intrahepatic immune response in DILI remains unknown. EXPERIMENTAL APPROACH: Acute liver injury was induced by paracetamol (acetaminophen), carbon tetrachloride (CCl4 ), and d-galactosamine/LPS (GalN/LPS) in wild-type (WT) and Ox40 knockout (KO) mice, and disease progress was compared. KEY RESULTS: Plasma OX40 levels were significantly increased and were augmented in intrahepatic CD4+ T cells after paracetamol, CCl4 , or GalN/LPS administration. Liver injury in Ox40-deficient mice was attenuated compared with that in WT mice. Compared with WT mice, hepatic infiltration of Th1 and Th17 cells and macrophages in Ox40 KO mice was reduced. Furthermore, adoptive transfer of Ox40 KO-CD4+ T cells to Rag1-/- mice resulted in alleviated liver injury compared with WT-CD4+ T-cell transfer, with reduced liver infiltration of macrophages and pro-inflammatory cytokine secretion. Moreover, OX40/Fc stimulation in vitro revealed that soluble OX40 enhanced the biological function of murine macrophages, including up-regulation of genes associated with inflammation and tissue infiltration. Finally, soluble OX40 levels were significantly elevated in DILI patients compared with healthy controls. CONCLUSION AND IMPLICATIONS: OX40 is a key molecule that promotes both pro-inflammatory macrophage and CD4+ T-cell function, exacerbating paracetamol-induced liver injury. OX40 could serve as a diagnostic index and therapeutic target of DILI.
BACKGROUND AND PURPOSE: The innate and adaptive immune systems both play important roles in drug-induced liver injury (DILI). However, the crosstalk between the innate and adaptive immunity in DILI is largely unknown. Extensive crosstalk is likely mandated by co-stimulatory interactions between these immune systems. OX40 is a co-stimulatory molecule, but whether it regulates the intrahepatic immune response in DILI remains unknown. EXPERIMENTAL APPROACH: Acute liver injury was induced by paracetamol (acetaminophen), carbon tetrachloride (CCl4 ), and d-galactosamine/LPS (GalN/LPS) in wild-type (WT) and Ox40 knockout (KO) mice, and disease progress was compared. KEY RESULTS: Plasma OX40 levels were significantly increased and were augmented in intrahepatic CD4+ T cells after paracetamol, CCl4 , or GalN/LPS administration. Liver injury in Ox40-deficient mice was attenuated compared with that in WT mice. Compared with WT mice, hepatic infiltration of Th1 and Th17 cells and macrophages in Ox40 KO mice was reduced. Furthermore, adoptive transfer of Ox40 KO-CD4+ T cells to Rag1-/- mice resulted in alleviated liver injury compared with WT-CD4+ T-cell transfer, with reduced liver infiltration of macrophages and pro-inflammatory cytokine secretion. Moreover, OX40/Fc stimulation in vitro revealed that soluble OX40 enhanced the biological function of murine macrophages, including up-regulation of genes associated with inflammation and tissue infiltration. Finally, soluble OX40 levels were significantly elevated in DILI patients compared with healthy controls. CONCLUSION AND IMPLICATIONS: OX40 is a key molecule that promotes both pro-inflammatory macrophage and CD4+ T-cell function, exacerbating paracetamol-induced liver injury. OX40 could serve as a diagnostic index and therapeutic target of DILI.
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