摘要
为了探讨老年高血压患者血小板内L 精氨酸(L Arg) /一氧化氮 (NO)转运系统的变化 ,收集了大于 6 0岁的原发性高血压无并发症患者 2 0例 (实验组 )及同龄健康老年人 15人(对照组) ,清晨空腹抽血测定血小板L 精氨酸 (Arg)转运、一氧化氮合成酶(NOS)及亚硝酸盐 (NO-2 )的含量。结果发现 ,老年原发性高血压组与对照组比较 ,血小板内NOS的活性及NO-2 的含量明显低于对照组 (P <0 0 1) ,老年原发性高血压患者的血小板L Arg的最大转运速率 (Vmax)明显降低 (P <0 0 1) ,而L Arg转运的米氏常数值 (Km)无明显变化(P >0 0 5 )。本研究提示 ,老年原发性高血压患者血小板内L Arg/NO转运系统功能明显降低 ,而血小板内L Arg/NO转运系统有抗血栓作用 ,所以高血压病人除了充分降压治疗 ,还应给予抗血小板药物治疗 。
To observe the changes in L Arginine /NO pathway of platelet in elderly patients with essential hypertension 20 elderly patients with essential hypertension and 15 healthy volunteers were entered for the study. The changes in L Arg transport, the activity of NOS and the production of NO - 2 were measured. Results showed that the activity of NOS and the production of NO - 2 were decreased, compared with those of healthy volunteers. The maximum transport velocity (Vmax) of L Arg transport in elderly patients with essential hypertension was 70% of healthy volunteers. No changes in Michaelis constant (Km) were found. This results suggested that function of L Arginine/NO pathway of platelet in patients with hypertersion is decreased. L Arginine/NO pathway of platelet played an important role in antithrombosis. Not only drugs to lower blood pressure should be given but also antiplatelet drugs to prevent thrombosis.
出处
《解放军医学杂志》
CAS
CSCD
北大核心
2003年第2期178-179,共2页
Medical Journal of Chinese People's Liberation Army
关键词
高血压
老年人
血小板
一氧化氮
hypertension
aged
blood platelets
nitric oxide
