巨细胞是调控T细胞耐受性的重要中间体
Li-Fan Lu1, Evan F Lind, David C Gondek
1Department of Microbiology & Immunology, Dartmouth Medical School and the Norris Cotton Cancer Center, Lebanon, New Hampshire 03756, USA.
Nature
|August 22, 2006
概括
巨细胞对于调节性T细胞依赖性免疫耐受性至关重要,与它们在过敏中的作用相反. 调节性T细胞通过IL-9激活巨细胞,调解区域性免疫抑制和全移植耐受性.
科学领域:
- 免疫学 免疫学 免疫学
- 移植免疫学 移植免疫学
背景情况:
- 巨细胞通常与过敏状况中的前炎性反应有关.
- 调控性T细胞 (T(Reg)) 在维持周围免疫耐受性方面发挥着关键作用.
研究的目的:
- 调查巨细胞在调控性T (T(Reg)) 细胞依赖的外围耐受性中的作用.
- 阐明T(Reg) 细胞在全移植耐受性背景下影响巨细胞的机制.
主要方法:
- 对耐受性全移植中的基因表达的分析.
- 诱导乳腺细胞缺乏的小鼠中的全移植耐受性.
- 测量由T(Reg) 细胞产生的互白素-9 (IL-9) 水平.
- 中和IL-9以评估其对异位移植排斥的影响.
- 对T ((Reg) -IL-9杆细胞相互作用的免疫组织化学分析.
主要成果:
- 耐受性全移植体表现出由巨细胞产物主导的基因表达模式.
- 乳腺细胞对于诱导全移植耐受性至关重要,正如在乳腺细胞缺乏的小鼠中所示的那样.
- 激活的T ((Reg) 细胞产生高水平的IL-9,这是一种巨细胞生长和激活因子.
- 在耐受性组织中,IL-9调解着瘤细胞的招募和激活.
- 在耐受性小鼠中,IL-9的中和加速了异种移植的排斥.
- 在耐受性全移植体内发现了一种新的T(Reg) -IL-9杆细胞轴.
结论:
- 乳腺细胞对于T ((Reg) 细胞介导的外周耐受性至关重要,挑战了它们的传统的促炎作用.
- 细胞轴T ((Reg) -IL-9是实现区域性免疫抑制和维持全移植耐受性的关键机制.
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