eNOS基因多态性与急性高山病低氧运动习服效果的关联研究

目的:研究eNOS基因的G894T和4B/4A位点多态性与急性高山病(AMS)的发生及其低氧运动习服效果的关系.方法:阶段1:在模拟海拔4800 m低氧环境中,61名北方汉族大学生急性暴露6h,其中,入舱30 min后以恒定负荷蹬车20 min(70 r/min),LLS量表评价AMS.阶段2:恢复1周后,48名受试者在模拟环境下进行3周(2 h/天,4 d/周)渐进式低氧训练,海拔高度分别为2500 m、3500 m和4800 m.恢复1周后,重复阶段1的低氧暴露和运动,LLS量表评价AMS.以PCR-RFLP法检测受试者eNOS基因G894T和4B/4A位点的基因型和等位基因频率.结果:阶段1中,49.2%的受试者发生AMS,G894T不同基因型和等位基因携带者的AMS发生率无显著差异,4A基因携带者的AMS发生率显著高于4B携带者.低氧运动前、后,受试者AMS评分的分布频率具有非常显著性差异,60.4%的受试者低氧耐受力增强,4A携带者AMS的低氧习服效果更好.结论:间歇性低氧暴露辅以运动对AMS的低氧习服效果显著,4A等位基因是AMS易感性及其低氧习服效果的遗传学标记.

Research Related to the Effects of Polymorphisms of eNOS on the Sports Hypoxia Acclimatization to Acute Mountain Sickness

Objectives:To study the effects of polymorphisms of eNOS at G894T and 4B/4A loci on incidence and the sports hypoxia acclimation to Acute Mountain Sickness(AMS).Methods:Phase 1:61 students,all male Chinese Han origin lowlanders,were involved in a 6h acute exposure to 4800m altitude-equivalent.Within 30 min of arriving at altitude,volunteers exercised at constant work rate for 20min on a cycle ergometer(70r/min),then rested for the remainder of the 6h altitude exposure.Incidence and severity of AMS symptoms ...