不正常的淋巴神经1-信号加剧淋巴功能障碍和组织炎症
Dongeon Kim1,2, Wen Tian1,2, Timothy Ting-Hsuan Wu2,3
1VA Palo Alto Health Care System, Palo Alto, CA (D.K., W.T., M.X., R.V., J.L.C., S.G., S.L., Y.Z., T.G., E.C.S., E.B., J.P., X.J., M.R.N.).
在淋巴内皮细胞 (LEC) 中减少的基-1-酸盐 (S1P) 信号通过增加细胞粘附和T细胞激活加剧淋巴. P-选择因抑制剂对治疗这种疾病具有前景.
科学领域:
- 免疫学
- 血管生物学
- 细胞信号传输
背景情况:
- 淋巴是一个全球性的健康问题, 缺乏有效的药物治疗.
- 不调节的淋巴内皮细胞 (LEC) 信号和T细胞免疫是关键的治疗点.
- 对于LEC功能和T细胞调节来说,sphingosine-1-phosphate (S1P) 信号传递至关重要.
研究的目的:
- 调查S1P信号在淋巴内皮细胞 (LEC) 在淋巴中的作用.
- 确定S1P信号改变对T细胞激活和分化的影响.
- 评估P-selectin作为淋巴的治疗点.
主要方法:
- 在人类和小鼠淋巴组织中评估S1P信号.
- 产生LEC特异性的S1pr1缺陷小鼠 (S1pr1LECKO) 来研究淋巴的进展.
- 与CD4T细胞共同培养LEC以分析T细胞激活和分化.
- 在体内和体外测试了P-选择素阻断的有效性.
主要成果:
- 通过S1PR1降低S1P信号在淋巴发性LEC与疾病严重程度相关.
- 在LEC中S1pr1缺陷加剧了淋巴和增加了CD4T细胞透.
- 在LEC中抑制S1PR1促进T辅助细胞分化和增强P选择蛋白表达.
- 在小鼠中,P- 选择蛋白阻塞降低了淋巴和Th1/ Th2免疫反应.
结论:
- 通过增加LEC粘附和致病性T细胞反应,减少LEC S1P信号会加剧淋巴.
- P-选择因抑制剂代表了淋巴治疗的潜在治疗策略.
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