Vitiligo is an autoimmune disease of the skin with characteristic of white patchy depigmentation, resulting from depletion of melanocytes attacked by antigen-specific T cells. Although cellular immunity plays a central role in the initiation and progression of Vitiligo, cellular mechanisms are largely unknown. Our recent study has shown that oxidative stress promotes the pathophysiological progress of vitiligo. However, whether and how ROS signaling regulates the activation of cellular immunity in vitiligo are unknown. We here hypothesize that.ROS signaling can suppress PD-1/PD-L1 pathways in vitiligous melanocytes and CD8+ T cells, resulting in enhancement of activation and cytotoxicity of CD8+ T cells. Our proposed mechanismstudy will initiate and advance in a systemic view of the field that elucidates and highlights how cellular oxidative stress signaling activates cellular immunity thus promoting the progress of vitiligo.
白癜风是抗原特异性CD8+杀伤性T细胞对黑素细胞杀伤造成皮肤白斑的一种自身免疫性疾病,关键机理CD8+杀伤性T细胞激活及功能亢进尚不清。研究显示活性氧簇(ROS)促进白癜风黑素细胞病理变化,但ROS是否参与调控白癜风CD8+T细胞免疫激活以及如何介导对黑素细胞杀伤未知。前期研究发现ROS引起白癜风黑素细胞程序性死亡受体配体1(PD-L1)表达下调,上调PD-1-/CD8+T细胞亚群。由此提出ROS负向调节PD-1/PD-L1通路是白癜风CD8+T细胞功能增强的关键机理。本课题在此基础上深入研究ROS抑制黑素细胞PD-L1及CD8+T细胞PD-1表达分子机制,揭示PD-1/PD-L1通路及抗氧化酶血红素氧化酶-1(HO-1)表达下调增强CD8+T细胞功能的分子网络结构,阐明ROS激活是白癜风发生发展枢纽点。本研究对进一步完善白癜风发病关键免疫机制,寻找疗效预判分子,提高疗效有重要意义。
白癜风是抗原特异性CD8+杀伤性T细胞对黑素细胞杀伤造成皮肤白斑的一种自身免疫性疾病,关键机理CD8+杀伤性T细胞激活及功能亢进尚不清。研究显示活性氧簇(ROS)促进白癜风黑素细胞病理变化,但ROS是否参与调控白癜风CD8+T细胞免疫激活以及如何介导对黑素细胞杀伤未知。前期研究发现ROS引起白癜风黑素细胞程序性死亡受体配体1(PD-L1)表达下调,上调PD-1-/CD8+T细胞亚群。由此提出ROS负向调节PD-1/PD-L1通路是白癜风CD8+T细胞功能增强的关键机理。本课题在此基础上深入研究ROS抑制黑素细胞PD-L1及CD8+T细胞PD-1表达分子机制,揭示PD-1/PD-L1通路及抗氧化酶血红素氧化酶-1(HO-1)表达下调增强CD8+T细胞功能的分子网络结构,阐明ROS激活是白癜风发生发展枢纽点。本研究对进一步完善白癜风发病关键免疫机制,寻找疗效预判分子,提高疗效有重要意义。
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数据更新时间:2023-05-31
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