新生儿缺氧缺血性脑病时血小板活化因子水平的变化及临床意义

目的　研究新生儿缺氧缺血性脑病 (HIE)患儿外周血中血小板活化因子 (PAF)水平的变化 ,探讨 PAF与新生儿 HIE的关系及其在 HIE发病机制中的作用。　方法　采用放射免疫法测定新生儿 HIE患儿急性期 (生后 1～ 3d)和恢复期 (8～ 10 d)全血 PAF和超氧化物歧化酶 (SOD)的含量 ,并与对照组做同期比较。　结果　 HIE患儿急性期血 PAF水平较对照组明显升高 ,且血 PAF含量随病情程度的加重而升高 ;血 SOD水平及血小板计数在 HIE各组中显著降低 ,PAF与 SOD、血小板计数呈负相关 (r=- 0 .4 6 7、- 0 .35 9,P<0 .0 5 )。　结论　新生儿 HIE血 PAF水平变化与 HIE和脑损伤严重程度有关 ,PAF在新生儿缺氧缺血性脑损伤的发病机制中起重要作用 ,PAF受体拮抗剂能起到有效的神经保护作用 ,为 HIE的治疗提供新的途径和方法

Investigation of Blood Platelet-activating Factor Levels in Neonatal Hypoxic-ischemic Encephalopathy

Objective To study the changes of the blood Platelet activating factor (PAF)levels in neonatal hypoxic ischemic encephalopathy(HIE),and explore the relationship between PAF levels and severity of brain damage. Method The levels of blood PAF and SOD were measured in neonates with HIE by radio immunoassay and compared with that of normal term neonates. Results Blood PAF levels were much higher in acute stage of HIE,and PAF levels increased with the severity of HIE.Blood SOD and platelets were much lower compared with PAF. PAF is negatively correlated to SOD and PLT.( r=-0.467 and r=-0.359,P<0.05 ). Conclusion The changes of blood PAF are related to the severity of HIE and brain damage.It is suggested that PAF might play an important role in the pathogenesis of neonatal HIE.The clinical usage of PAF receptor antagonists are expected to be helpful to give a new way to the therapy of HIE.