亚硝基谷胱甘肽对冰冻血小板聚集及一氧化氮含量的影响

本研究探讨亚硝基谷胱甘肽(GSNO)对冷冻血小板聚集及一氧化氮(NO)含量的影响。用血小板聚集仪对血小板的聚集率进行测定,用硝酸还原酶法对NO含量进行检测。结果表明,新鲜液态血小板的聚集率为(63.44±2.96)%,冷冻血小板的聚集率为(35.47±2.93)%,加入GSNO后的冷冻血小板聚集率为(24.43±3.07)%。32例正常献血者新鲜液态血小板的NO浓度为(31.59±16.88)μmol/L。32例冷冻血小板的NO浓度为(22.16±6.38)μmol/L,明显低于新鲜液态血小板组。32例加入GSNO的冷冻血小板NO浓度为(45.64±6.31)μmol/L,明显高于新鲜液态血小板组。结论:GSNO增加了冷冻血小板NO的浓度,抑制血小板的聚集,保持血小板的功能,可以用作冷冻保护剂。

Influence of S-nitrosoglutathione on agglutination and nitric oxide concentration in frozen platelets

The aim of this study was to investigate the influence of S-nitrosoglutathion (GSNO) on agglutination and nitric oxide (NO) concentration in frozen platelets. The agglutination of platelets was detected by using platelet aggutination apparatus, the level of NO in platelets was detected by the nitrate enzyme reduction method. The results showed that the rates of agglutination in frezen platelets and frozen platelest treated with GSNO were (35.47 ± 2.93) and (24.43 ± 3.07), which were significantly lower than that in fresh liquid platelets (63.44 ± 2.96). The level of NO concentration in frozen platelets was (22.16 ± 6.38), which was significantly lower than that in fresh liquid platelets (31.59 ± 16.88). The level of NO concentration in frozen platelets treated with GSNO was (45.64 ± 6.31), which was significantly higher than that in fresh liquid platelets (P < 0.01). It is concluded that GSNO increases the concentration of NO in frozen platelets, inhibits platelet activation and maintains platelet function, thus GSNO can be used as a frozen protective agent.