文章摘要
Yu Zhang,Qingyan Zhang,Jing Zhang,Qian Tian,minghua Li.[J].南京医科大学学报,2008,28(4):243~245
Dipyridamole enhances inhibitory effect of adenosine on neutrophils in human peripheral blood
投稿时间:2008-03-12  
DOI:10.7655
中文关键词: 
英文关键词: dipyridamole  hydrogen peroxide  adenosine  neutrophils
基金项目:
作者单位
Yu Zhang Department of Cardiology, the First Hospital of Jilin University, Changchun130021, Jilin Province, China 
Qingyan Zhang  
Jing Zhang  
Qian Tian  
minghua Li  
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中文摘要:
      
英文摘要:
      Objective: It was known that neutrophils play an important role in ischemic-reperfusion injury. In this study we tested the effect and its mechanism of dipyridamole on neutrophils. Methods:Hydrogen peroxide(H2O2) production by neutrophils was determined using luminol amplified chemiluminescence and the percentage of activity was calculated by observing the uninhibited peak height. Results: Dipyridamole per se produced a concentration-dependent inhibition of H2O2 by formyl-MetleuPhe(fMLP)-stimulated neutrophils. Dipy-ridamole at a low concentration(0.3μmol·L-1) that per se affected neutrophils only slightly, enhanced markedly the effects of adenosine on neutrophils. On the other hand, dipyridamole did not alter the inhibitory effect of NECA(5’-N-ethylcarboxamidoadenosine) on neutrophils. However, propentofylline, a known inhibitor of adenosine uptake, also gotten the same result. Conclusion:Dipy-ridamole inhibited the production of H2O2 by fMLP-stimulated neutrophils. Dipyridamole at a low concentration enhanced the inhibi-tory effect of adenosine on neutrophils. The mechanism involved is probably due to the effect of dipyridamole on adenosine uptake.
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