JACC:复发心梗的造血和免疫反应远小于第一次心梗

2020-02-27 不详 MedSci原创

反复心梗在冠心病患者中比较常见,且与死亡率增高相关。骨髓祖细胞的长期重编程发生在对炎症刺激的反应中,且会在机体对继发性炎症反应后发生改变。本研究的目的旨在评估反复心梗对骨髓刺激和炎症反应的影响。本研究开发了一种可以在同一只小鼠进行连续2次模型不同左室区域心梗的手术方法,通过结扎左回旋动脉,再结扎左冠状动脉前降支,造成复发心肌梗死。第一次心肌梗死通过循环信号诱导骨髓的"记忆",降低骨髓巨噬细胞造血维

反复心梗在冠心病患者中比较常见,且与死亡率增高相关。骨髓祖细胞的长期重编程发生在对炎症刺激的反应中,且会在机体对继发性炎症反应后发生改变。本研究的目的旨在评估反复心梗对骨髓刺激和炎症反应的影响。

本研究开发了一种可以在同一只小鼠进行连续2次模型不同左室区域心梗的手术方法,通过结扎左回旋动脉,再结扎左冠状动脉前降支,造成复发心肌梗死。第一次心肌梗死通过循环信号诱导骨髓的"记忆",降低骨髓巨噬细胞造血维持因子的表达。这会抑制机体对后续事件的反应性。尽管肌钙蛋白水平的变化相似,但复发性心肌梗死比首次心肌梗死导致的紧急造血和白细胞更少,从而导致更少的白细胞迁移至梗死区域。在先前的心肌梗死后,对脂多糖的造血反应也减轻了。另外,28例复发性心肌梗死患者的白细胞计数较首次心肌梗死患者明显降低。

研究结果显示,造血和先天免疫反应是由第一次的心肌梗死形成的。

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    2020-03-10 hbwxf
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    2020-02-29 俅侠

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