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B7-1/B7-2共刺激调节了低密度脂蛋白受体缺乏小鼠的斑块抗原特异性T细胞反应和动脉生成
Chiara Buono1, Hong Pang, Yasushi Uchida
1Immunology Research Division and the Vascular Research Division, Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, Mass 02115, USA.
Circulation
|April 21, 2004
概括
B7-1/B7-2共刺激途径对于驱动动动脉硬化的T细胞反应至关重要. 阻止这种途径会减少小鼠的病变发展和T细胞炎症活性.
科学领域:
- 免疫学 免疫学 免疫学
- 心血管研究研究心血管研究
- 动脉样硬化病原体的产生
背景情况:
- T细胞的反应,特别是干扰素- (IFN-) 对氧化LDL和HSP60等损伤抗原的产生,与动脉样硬化疾病的进展和斑块的不稳定性有关.
- B7-1和B7-2是T细胞激活所必需的抗原呈现细胞上的关键辅助刺激分子.
研究的目的:
- 研究B7-1/B7-2共刺激对T细胞介导的动脉样硬化影响中的作用.
- 测试T细胞对动脉样硬化的影响依赖于B7-1/B7-2共刺激的假设.
主要方法:
- 使用了B7-1/B7-2/LDL受体 (LDLR) 缺乏的小鼠和LDLR缺乏的对照小鼠,分别在8周和20周内食高胆固醇饮食.
- 分析了血清胆固醇,动脉样硬化病变的程度和表型,以及体外用HSP60刺激的CD4+T细胞的IFN-玛/互白素-4产量.
主要成果:
- 缺少B7-1和B7-2显著降低了胆固醇饮食中的LDLR缺乏小鼠早期动脉样硬化发展.
- 胆固醇养的B7缺乏小鼠的CD4+ T细胞在对HSP60的反应中产生显著较少的IFN-马相比对照.
结论:
- B7-1和B7-2分子调节动脉样硬化病变的发展.
- 这些辅助刺激分子对于对损伤抗原特异的T细胞进行启动至关重要.
- B7-CD28通路代表了在动脉样硬化中免疫调节的潜在治疗标.
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