CD73/ecto-5'-核酶可以防止血管炎症和新密性形成
Alma Zernecke1, Kiril Bidzhekov, Burcin Ozüyaman
1Institute of Molecular Cardiovascular Research, Rheinisch-Westfälische Technisch Hochschule, Aachen, Germany.
Circulation
|April 26, 2006
概括
血管CD73限制了内皮激活和单细胞招募. 缺少CD73会增加血管细胞粘附分子-1 (VCAM-1),并促进炎症,但A2A受体激素治疗提供了保护.
科学领域:
- 心血管生物学 心血管生物学
- 免疫学 免疫学 免疫学
- 分子医学是分子医学.
背景情况:
- 已知CD73/ecto-5'-核酶在血管保护中的作用,但其在调节内皮粘附分子和血管损伤期间炎症单细胞招募方面的特定功能尚不清楚.
- 了解CD73对内皮细胞激活和炎症细胞贩运的影响,对于开发针对血管疾病的向疗法至关重要.
研究的目的:
- 在血管损伤的背景下,研究血管CD73在控制内皮激活和炎症单细胞招募中的作用.
- 阐明CD73影响血管细胞粘附分子-1 (VCAM-1) 表达和单细胞粘附的分子机制.
主要方法:
- 对CD73缺陷 (CD73(-/-)) 和野生型小鼠进行比较,评估VCAM-1表达,核因子-kappaB (NF-kappaB) 活性和动脉中单细胞的招募.
- 在实验室中使用CD73的内皮细胞 (ECs) 来评估VCAM-1表达和NF-kappaB激活.
- 动脉的电线损伤模型,以评估新极度增生和炎症细胞透.
- 用A2A受体激动剂 (ATL-146e) 进行治疗,以评估其治疗潜力.
主要成果:
- CD73(-/-) 小鼠表现出增加的VCAM-1表达和增强的单细胞对内皮细胞的粘附,由α(4β1) 整合素介导.
- 在CD73(-/-) 小鼠中,电线损伤导致了新极端斑块形成,巨细胞含量,NF-kappaB激活和VCAM-1水平的增加.
- 用ATL-146e治疗逆转了VCAM-1上调和抑制了CD73中单细胞的结,并防止了体内新密的形成.
结论:
- 血管CD73在抑制内皮激活和炎症单细胞招募方面发挥着关键作用.
- 通过A2A受体作用的CD73产生的腺是限制血管炎症的关键机制.
- 向CD73-adenosine-A2A受体通路对于预防血管炎症和新极度增生症具有治疗前景.
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