CD40L promotes development of acute aortic dissection via induction of inflammation and impairment of endothelial cell function.

CD40L promotes development of acute aortic dissection via induction of inflammation and impairment of endothelial cell function.
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CD40L 通过诱导炎症和损伤内皮细胞功能促进急性主动脉夹层的发展

DOI:
10.18632/aging.101394
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发表时间:
2018-03-04
期刊:
Aging
影响因子:
--
通讯作者:
Zhang HJ
Zhang HJ
中科院分区:
其他
文献类型:
--
作者:
Han L;Dai L;Zhao YF;Li HY;Liu O;Lan F;Jiang WJ;Zhang HJ

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急性主动脉夹层是最致命的心血管疾病之一。 AAD 的主要组织病理学特征是内侧降解,尤其是弹性蛋白和胶原蛋白的分解。然而,其根本机制仍然是个谜。血小板表达的 CD40 配体 (CD40L) 最近通过其促炎作用被认为是心血管疾病发展的关键效应物。为了阐明 CD40L 在 AAD 中的作用,我们检测了人血清样本中的 CD40L 水平,发现 AAD 患者的 CD40L 水平显着高于健康受试者(26.8±5.52 ng/mL 与 13.4±4.00 ng/mL)。为了进一步研究CD40L是否参与AAD的发生,我们应用β-氨基丙腈(BAPN)诱导的AAD小鼠模型。与人类数据一致,AAD 小鼠中的循环 CD40L 远高于正常小鼠(148.40±75.96 pg/mL 与 44.09±19.65 pg/mL)。与此同时,AAD 小鼠中多种促炎趋化因子显着增加。重要的是,用 BAPN 治疗的 CD40L-/- 小鼠没有出现这些表型。最后,我们证实 CD40L 显着抑制内皮细胞迁移,表明内膜损伤的恢复受损。总之,我们发现 CD40L 通过其促炎作用和抑制内皮细胞功能促进 AAD 的发展。
Acute aortic dissection is one of the most lethal cardiovascular disease. The major histopathological feature of AAD is medial degradation, especially breakdown of elastin and collagen. However, the underlying mechanism remains a mystery. Platelets expressed CD40 Ligand (CD40L) is recently recognised as a key effector of cardiovascular disease development through its pro-inflammatory effect. To clarify the role of CD40L in AAD, we examined level of CD40L in human blood serum samples and found that it is significantly higher in AAD patients compared with healthy subjects (26.8±5.52 ng/mL versus 13.4±4.00 ng/mL). To further investigate if CD40L is involve in the development of AAD, we applied β-aminopropionitrile (BAPN) induced mouse model of AAD. Consistent with the human data, circulating CD40L in AAD mice much higher than normal mice (148.40±75.96 pg/mL versus 44.09±19.65 pg/mL). Meanwhile, multiple pro-inflammatory chemokines significantly increased in AAD mice. Importantly, the CD40L-/- mice treated with BAPN did not develop these phenotypes. Lastly, we confirmed that endothelial cells migration was significantly inhibited by CD40L, suggesting impaired recovery from intimal injury. In summary, we found that CD40L promoted AAD development through its pro-inflammatory effects and inhibition of endothelial cell function.
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