Frontiers in Immunology (Oct 2021)

β2-Adrenergic Receptor Enhances the Alternatively Activated Macrophages and Promotes Biliary Injuries Caused by Helminth Infection

  • Stephane Koda,
  • Beibei Zhang,
  • Beibei Zhang,
  • Qian-Yang Zhou,
  • Qian-Yang Zhou,
  • Na Xu,
  • Jing Li,
  • Ji-Xin Liu,
  • Man Liu,
  • Zi-Yan Lv,
  • Jian-Ling Wang,
  • Yanbiao Shi,
  • Sijia Gao,
  • Qian Yu,
  • Xiang-Yang Li,
  • Xiang-Yang Li,
  • Yin-Hai Xu,
  • Jia-Xu Chen,
  • B. Oneill Telakeng Tekengne,
  • Gabriel K. Adzika,
  • Ren-Xian Tang,
  • Ren-Xian Tang,
  • Hong Sun,
  • Hong Sun,
  • Kui-Yang Zheng,
  • Kui-Yang Zheng,
  • Chao Yan,
  • Chao Yan

DOI
https://doi.org/10.3389/fimmu.2021.754208
Journal volume & issue
Vol. 12

Abstract

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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 β2-AR deficiency alleviates hepatobiliary damage in mice infected with C. sinensis. Moreover, β2-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 β2-AR enhances type 2 immune response through the ERK/mTORC1 signaling pathway in macrophages and their role in liver fibrosis.

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