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广泛的心肌炎症和与心脏病发作相关的动脉通透性
Antonio Abbate1, Elena Bonanno, Alessandro Mauriello
1Institute of Cardiology, Catholic University, Rome, Italy. abbatea@yahoo.com.
Circulation
|June 24, 2004
概括
在大多数急性心肌梗塞 (AMI) 后的患者中,激活的T淋巴细胞存在于心肌的偏远区域. 在未受影响的心肌中,这种免疫反应可能会导致持续的动脉阻塞.
科学领域:
- 心血管病理学心血管病理学
- 免疫学 免疫学 免疫学
- 心肌梗塞研究研究的心肌梗塞.
背景情况:
- 扩散冠状动脉血管炎症与急性冠状动脉综合征有关.
- 心肌本身的炎症存在,特别是在心肌梗塞未影响的区域,仍然在很大程度上未被调查.
- 了解心肌炎炎症对于了解急性心肌梗塞 (AMI) 的全部病理学至关重要.
研究的目的:
- 调查AMI患者的偏远,未受影响的心肌区域中激活免疫细胞的存在和程度.
- 在同一个AMI患者中,将远程心肌的炎症状况与心脏周发作区域进行比较.
- 在没有AMI的对照人群中确定心肌炎炎症的基线.
主要方法:
- 分析了16名患者的尸检样本,这些患者在AMI后1-12周死亡,以及16名对照人.
- 在AMI病例中,从偏远的未受影响区域和心肌梗塞周边区域取取心肌组织样本.
- 同焦显微镜量化了激活细胞 (DR+),T淋巴细胞 (CD3+) 和激活T淋巴细胞 (CD3+/DR+).
主要成果:
- 在69%的AMI患者中,在偏远的心肌区域检测到活化细胞和T淋巴细胞,并在100%的心脏梗塞前区域检测到活化细胞和T淋巴细胞.
- 在对照心脏 (0%) 中没有发现激活细胞或T淋巴细胞,这表明存在显著差异 (P<0.001).
- 偏远地区较高的炎症负担与持续的心脏病相关动脉封闭相关 (P<0.05).
结论:
- 这项研究首次证实了近期AMI患者大约三分之二的远程未受影响心肌细胞中激活的T淋巴细胞.
- 这些细胞与持续性动脉封闭的关联表明,在冠状动脉疾病的病理生理学中可能发挥作用.
- 这些发现暗示,心肌抗原刺激可能会触发免疫反应,这对导致动脉封闭至关重要.
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