衰老会影响由TLR2/TLR4激活的树突细胞诱导的CD4+T细胞两极化和粘膜热流
Sara Zúquete1,2, Mariana Ferreira1,2, Inês L S Delgado1,2,3
1CIISA-Centro de Investigação Interdisciplinar em Sanidade Animal, Faculdade de Medicina Veterinária, Universidade de Lisboa, Avenida da Universidade Técnica, Lisboa 1300-477, Portugal.
在老化的树突细胞 (DCs) 中,收费类受体 (TLR) 的激活会损害T细胞的归向,并改变细胞因子配置. 了解这些与年龄相关的DC功能变化对于开发有效的免疫调节策略至关重要.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 衰老研究研究 衰老研究
背景情况:
- 树突细胞 (DC) 中的托尔类受体 (TLR) 激活促进维生素A的新陈代谢,诱导T细胞归宿分子.
- 同时激活TLR2和TLR4可增强直流容量,并促进T细胞中的Th1极化.
研究的目的:
- 调查衰老对TLR2/TLR4刺激的DC功能和随后的T细胞原始化的影响.
- 通过DCs和T细胞反应分析细胞因子产生的与年龄相关的变化.
主要方法:
- 使用TLR2/TLR4激动剂刺激老年DCs.
- 对DC细胞因子产生的分析 (TNFα,IL-10).
- 评估粘膜同源受体 (CCR9) 和细胞因子 (IFNγ,IL-4,IL-13) 的CD4+T细胞表达.
主要成果:
- 与年轻的DC相比,老年DC产生的TNFα较少,IL-10较多.
- 由老年DCs启动的T细胞显示CCR9表达减少.
- 由老化DCs启动的T细胞产生较少的1型 (IFNγ) 和更多的2型 (IL-4,IL-13) 细胞因子.
结论:
- 衰老改变了DC功能,导致T细胞定位受损和偏斜的细胞因子反应.
- 对于针对模式识别受体刺激的免疫调节策略,必须考虑DC功能与年龄相关的变化.
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