期刊论文详细信息
Journal of Neuroinflammation
Choroid plexus-selective inactivation of adenosine A2A receptors protects against T cell infiltration and experimental autoimmune encephalomyelitis
Xiangxiang Lin1  Yijia Feng1  Zhengzheng Li1  Mengqian Ye1  Yiyun Weng1  Muran Wang2  Zhenhai Zeng3  Wu Zheng3  Jiang-fan Chen3  Wei Guo3  Huiping Shang3  Xin Liu3  Ping Tang3  Sergii Vakal3  Xiaoting Sun3  Mengru Wang3 
[1] Department of Neurology, The First Affiliated Hospital of Wenzhou Medical University, 325000, Wenzhou, Zhejiang, China;Molecular Neuropharmacology Laboratory, School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, 325000, Wenzhou, China;Department of Neurology, The First Affiliated Hospital of Wenzhou Medical University, 325000, Wenzhou, Zhejiang, China;Molecular Neuropharmacology Laboratory, School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, 325000, Wenzhou, China;State Key Laboratory of Optometry and Vision Science, 325000, Wenzhou, China;
关键词: Adenosine A receptor;    Multiple sclerosis;    Choroid plexus;    Immune infiltration;   
DOI  :  10.1186/s12974-022-02415-z
来源: Springer
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【 摘 要 】

BackgroundMultiple sclerosis (MS) is one of the most common autoimmune disorders characterized by the infiltration of immune cells into the brain and demyelination. The unwanted immunosuppressive side effect of therapeutically successful natalizumab led us to focus on the choroid plexus (CP), a key site for the first wave of immune cell infiltration in experimental autoimmune encephalomyelitis (EAE), for the control of immune cells trafficking. Adenosine A2A receptor (A2AR) is emerging as a potential pharmacological target to control EAE pathogenesis. However, the cellular basis for the A2AR-mediated protection remains undetermined.MethodsIn the EAE model, we assessed A2AR expression and leukocyte trafficking determinants in the CP by immunohistochemistry and qPCR analyses. We determined the effect of the A2AR antagonist KW6002 treatment at days 8–12 or 8–14 post-immunization on T cell infiltration across the CP and EAE pathology. We determined the critical role of the CP-A2AR on T cell infiltration and EAE pathology by focal knock-down of CP-A2AR via intracerebroventricular injection of CRE-TAT recombinase into the A2ARflox/flox mice. In the cultured CP epithelium, we also evaluated the effect of overexpression of A2ARs or the A2AR agonist CGS21680 treatment on the CP permeability and lymphocytes migration.ResultsWe found the specific upregulation of A2AR in the CP associated with enhanced CP gateway activity peaked at day 12 post-immunization in EAE mice. Furthermore, the KW6002 treatment at days 8–12 or 8–14 post-immunization reduced T cell trafficking across the CP and attenuated EAE pathology. Importantly, focal CP-A2AR knock-down attenuated the pathogenic infiltration of Th17+ cells across the CP via inhibiting the CCR6–CCL20 axis through NFκB/STAT3 pathway and protected against EAE pathology. Lastly, activation of A2AR in the cultured epithelium by A2AR overexpression or CGS21680 treatment increased the permeability of the CP epithelium and facilitated lymphocytes migration.ConclusionThese findings define the CP niche as one of the primary sites of A2AR action, whereby A2AR antagonists confer protection against EAE pathology. Thus, pharmacological targeting of the CP-A2AR represents a novel therapeutic strategy for MS by controlling immune cell trafficking across CP.

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