beta 2-Adrenergic Receptor Enhances the Alternatively Activated Macrophages and Promotes Biliary Injuries Caused by Helminth Infection
FRONTIERS IN IMMUNOLOGY(2021)
摘要
The autonomic nervous system has been studied for its involvement in the control of macrophages; however, the mechanisms underlying the interaction between the adrenergic receptors and alternatively activated macrophages (M2) remain obscure. Using FVB wild-type and beta 2 adrenergic receptors knockout, we found that beta 2-AR deficiency alleviates hepatobiliary damage in mice infected with C. sinensis. Moreover, beta 2-AR-deficient mice decrease the activation and infiltration of M2 macrophages and decrease the production of type 2 cytokines, which are associated with a significant decrease in liver fibrosis in infected mice. Our in vitro results on bone marrow-derived macrophages revealed that macrophages from Adrb2(-/-) mice significantly decrease M2 markers and the phosphorylation of ERK/mTORC1 induced by IL-4 compared to that observed in M2 macrophages from Adrb2(+/+). This study provides a better understanding of the mechanisms by which the beta 2-AR enhances type 2 immune response through the ERK/mTORC1 signaling pathway in macrophages and their role in liver fibrosis.
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关键词
beta 2 adrenergic receptor, macrophages, liver fibrosis, Clonorchis sinensis, ERK, mTORC1 signaling
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