Hydrogen peroxide induces LFA-1-dependent neutrophil adherence to cardiac myocytes.

Hydrogen peroxide induces LFA-1-dependent neutrophil adherence to cardiac myocytes.
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过氧化氢诱导 LFA-1 依赖性中性粒细胞粘附于心肌细胞。

DOI:
10.1152/ajpheart.2000.278.3.h835
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发表时间:
2000
期刊:
American journal of physiology. Heart and circulatory physiology
影响因子:
--
通讯作者:
Smith,CW
Smith,CW
中科院分区:
--
文献类型:
--
作者:
Lu,H;Youker,K;Ballantyne,C;Entman,M;Smith,CW

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成人心肌细胞表达细胞间粘附分子(ICAM)-1对细胞因子刺激的反应。这允许化学活性刺激的中性粒细胞而不是未刺激的中性粒细胞的稳定粘附。在目前的研究中,我们证明,短暂暴露于H2 O2的ICAM-1表达心肌细胞促进心肌细胞和中性粒细胞之间的短暂粘附相互作用,而不添加趋化因子。这种短暂的粘附在两个方面不同于外源性趋化因子促进的稳定粘附。其发生更迅速,在15分钟内达到峰值,并且依赖于中性粒细胞上的白细胞功能相关抗原(LFA)-1(CD 11 a/CD 18)与肌细胞上的ICAM-1相互作用。相反,趋化因子诱导的粘附在60分钟达到峰值,并依赖于Mac-1(CD 11b/CD 18)。血小板活化因子(PAF)受体拮抗剂WEB-2086和SDZ-64-412可完全抑制短暂粘附。这些结果表明,犬嗜中性粒细胞可以利用LFA-1和Mac-1粘附到成人心肌细胞,与LFA-1触发的PAF样活性诱导的过氧化氢在心肌细胞。
Adult cardiac myocytes express intercellular adhesion molecule (ICAM)-1 in response to cytokine stimulation. This allows stable adhesion of chemotactically stimulated but not unstimulated neutrophils. In the current study, we demonstrated that brief exposure of ICAM-1-expressing cardiac myocytes to H2O2promoted transient adhesive interactions between myocytes and neutrophils without added chemotactic factors. This transient adhesion differed in two ways from the stable adhesion promoted by exogenous chemotactic factors. It occurred more rapidly, peaking within 15 min, and it was dependent on leukocyte function-associated antigen (LFA)-1 (CD11a/CD18) on the neutrophil interacting with ICAM-1 on the myocyte. In contrast, chemotactic factor-induced adhesion peaked at 60 min and was dependent on Mac-1 (CD11b/CD18). The transient adhesion could be completely inhibited by platelet-activating factor (PAF)-receptor antagonists WEB-2086 and SDZ-64-412. These results indicate that canine neutrophils may utilize both LFA-1 and Mac-1 to adhere to adult cardiac myocytes, with LFA-1 triggered by a PAF-like activity induced in myocytes by H2O2.
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