Activation of G-protein-coupled receptor 183 initiates inflammatory pain via macrophage CCL22 secretion

• DOI: 10.1016/j.ejphar.2023.175872
• Publication Date: 2023-06-21T12:24:40Z
• Authors: Zhenhua Qi; Weiqiang Zhong; Boyu Jiao; Kang Chen; Xiaohua Yang; Linjie Wang; Weian Zeng; Junting Huang; Jingdun Xie
• Keywords: Inflammation; Mice; Hyperalgesia; Macrophages; Animals; Chronic Pain; 3. Good health; Receptors, G-Protein-Coupled

Chronic pain is a major public health problem with limited effective therapeutic options. G-protein-coupled receptors play a significant role in pain modulation; however, whether and how G-protein-coupled receptor 183 participates in pain regulation remain unclear. In the present study, we found that G-protein-coupled receptor 183 expression was specifically upregulated in the hind paws of mice in various inflammatory pain models. Activation of G-protein-coupled receptor 183 induced acute pain, whereas inhibition or silencing of this receptor alleviated mechanical allodynia and thermal hyperalgesia in complete Freund's adjuvant (CFA) model. Mechanistically, activating G-protein-coupled receptor 183 triggers pain responses via the upregulation of C-C motif chemokine 22(CCL22) in macrophages while blocking the CCL22 receptor C-C motif chemokine receptor 4 (CCR4) attenuates pain hypersensitivity. Taken together, our findings indicate that the G-protein-coupled receptor 183-CCL22 axis has a critical role in the development and maintenance of inflammatory pain.