无症状高尿酸血症大鼠血液流变学和氧化应激

Hemorheology and oxidative stress in rats with asymptomatic hyperuricemia

目的从血液流变学的角度对长期无症状高尿酸血症开展系统研究,为该症的临床处理提供参考依据。方法将20只SD大鼠随机平均分为空白对照组和模型组。通过对大鼠腹腔注射250 mg/(kg·d)氧嗪酸钾诱导8周无症状高尿酸血症模型,采血测量尿酸水平、血液流变学指标、氧化和抗氧化指标。结果模型组大鼠红细胞的聚集指数、破碎率、血清黄嘌呤氧化酶活性(XOD)、血浆纤维蛋白原、血液黏度显著升高,红细胞的取向指数、电泳率、血清超氧化物歧化酶活性(SOD)、活化部分凝血酶时间(APTT)和凝血酶原时间(PT)显著降低。结论无症状高尿酸血症水平下机体氧化应激增强,使大鼠红细胞流变特性发生不良变化,血液处于高黏高凝状态。研究结果提示临床诊治中应对无症状高尿酸血症正确认识并及时干预。

Objective To launch systematic research on long-term asymptomatic hyperuricemia （HUA） from hemorheological viewpoint, so as to provide references for clinical treatment of asymptomatic HUA. Methods Twenty rats were randomly and evenly divided into normal control group and model group. The rats were intraperitoneally injected with 250 mg/（kg？d） oxonate for 8 weeks to induce the model of asymptomatic HUA. The blood samples were obtained to measure the serum uric acid, hemorheological parameters, oxidative and anti-oxidative indices. Results The aggregation index, haemolysis rate, serum xanthine oxidase （XOD）, plasma fibrinogen and blood viscosity significantly increased, while the orientation index, electrophoresis rate, serum superoxide dismutase （SOD）, activated partial thromboplastin time （APTT） and prothrombin time （PT） significantly induced. Conclusions The asymptomatic HUA can lead to more serious oxidative stress, deteriorate the hemorheological parameters of red blood cells in rats, and induce higher blood viscosity and coagulation status. The research findings indicate that asymptomatic HUA should be correctly understood and timely intervened in clinical diagnosis