骨髓相关蛋白-8/14的损失加剧了心脏异位移植排斥
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Murine Heterotopic Heart Transplant Technique
Published on: July 8, 2014
Koichi Shimizu1, Peter Libby, Viviane Z Rocha
1Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, 77 Avenue Louis Pasteur, NRB7, Boston, MA 02115, USA. ksmz@rics.bwh.harvard.edu
Circulation
|December 7, 2011
概括
骨髓相关蛋白 (MRP) -14缺乏症通过增加T细胞激活和抗原呈现,加剧心脏异位移植排斥. 缺少MRP-14会导致更严重的排斥,并突出其在免疫调节中的作用.
科学领域:
- 免疫学 免疫学 免疫学
- 移植生物学 移植生物学
- 心血管研究研究心血管研究
背景情况:
- 骨髓相关蛋白 (MRP) -8和MRP-14形成异构体 (MRP-8/14) 调节骨髓细胞功能和炎症.
- MRP-8/14复合体与急性异种移植排斥有关,但它们在心血管疾病中的作用尚未完全理解.
- 这项研究研究了MRP-8/14在使用MRP-14淘汰赛小鼠的心脏异种移植排斥中的功能.
研究的目的:
- 调查MRP-8/14复合体在心脏异位移植排斥中的作用.
- 为了确定MRP-14缺乏对免疫细胞激活和抗原呈现在异种移植排斥的背景下的影响.
主要方法:
- 心脏移植是在主要组织相容性复杂II类全相匹配的供体和受体小鼠 (野生型和MRP-14 ((-/-)) 之间进行的.
- 评估了异种移植的存活率,对酶体排斥得分,免疫细胞透率 (T细胞,巨细胞,淋巴细胞) 和化学/细胞mRNA水平.
- 树突细胞 (DC) 功能,包括共刺激分子表达 (CD80,CD86) 和抗原呈现能力,在MRP-14 (((-/-) 和野生类型接受者中进行了评估.
主要成果:
- 与野生类型接受者相比,MRP-14(-/-) 接受者表现出明显较短的全移植存活时间和更高的排斥得分.
- 在MRP-14(-/-) 接受者的异位移植显示T细胞,巨细胞和Th17细胞的透增加,以及高的炎症性细胞因子和化学因子水平.
- MRP-14 ((-/-) 树突细胞表现出CD80/CD86的增强表达和优异的抗原呈现功能,导致T细胞增多和细胞因子的产生.
结论:
- MRP-14在调节树突细胞共刺激分子表达和抗原呈现方面发挥着至关重要的作用.
- 缺少MRP-14会导致T细胞活化升高,并加剧心脏异位移植排斥.
- 这些发现揭示了MRP-14在调节免疫反应方面的前所未知的作用,这对于全移植的生存至关重要.
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