摘要
目的研究n-3多不饱和脂肪酸(n-3PUFA)对动脉粥样硬化(AS)大鼠血液流变性和凝血功能的影响,并探讨相关机制。方法Wistar大鼠24只按随机数字表法分为对照组、AS模型组和n-3PUFA组(每组8只)。模型组和n-3PUFA组,一次性给予维生素D360万U/蚝腹腔注射,以后高脂饲料喂养;正常对照组给予普通饲料及等量生理盐水注射。喂养6周后,n-3PUFA组给予n-3PUFA250mg·kg^-1·d^-1灌胃治疗6周。喂养12周后检测各组大鼠血脂、主动脉形态、血液流变性、凝血功能、一氧化氮(NO)、丙二醛(MDA)和总抗氧化能力(T—AOC)。结果模型组大鼠总胆固醇(TC)、低密度胆固醇(LDL-C)、血浆黏度、全血黏度、纤维蛋白原(FIB)浓度及MDA水平均明显高于对照组(均P〈0.05),但活化部分凝血酶时间(APTT)、凝血酶原时间(PT)、凝血酶时间(TT)、红细胞变形指数(DI)、血浆NO和T—AOC低于对照组(均P〈0.05)。n-3PUFA组TC和LDL-C水平低于模型组(均P〈0.05);血浆黏度、全血黏度(低、中、高切变黏度)、FIB浓度、MDA水平均低于模型组[(1.58±0.23)mPa·s比(1.81±0.16)mPa·s、(4.76±0.42)mPa·s比(5.47±0.41)mPa·s、(4.24±0.32)mPa·s比(4.91±0.39)mPa·s、(4.04±0.29)mPa·s比(4.58±0.33)mPa·s、(2.45±0.12)g/L比(2.65±0.13)g/L、(10.1±0.7)μ mol/ml比(11.2±0.6)μmol/ml,均P〈0.05],而APTT、PT、TT、红细胞DI、NO、T—AOC均高于模型组[(29.04±0.49)s比(26.46±0.25)s、(13.86±0.55)s比(10.71±0.34)s、(23.05±0.24)s比(20.90±0.68)s、0.35±0.01比0.31±0.02、(3.9±0.7)nmoL/ml比(2.8±0.7)nmoL/ml、(8.0±0.6)U/ml比(6.7±0.6)U/ml,均P〈0.05]。结论n-3PUFA通过影响动脉粥样硬化大鼠的氧化应激反应和内皮功能�
Objective To investigate the effect of n-3 polyunsaturated fatty acids (n-3PUFAs)on the hemorheology and coagulation function of high-fat induced atherosclerotic rats and understand the underlying mechanism. Methods Twenty-four Wistar rats were assigned randomly into 3 groups: normal control, model and n-3PUFAs treatment (n = 8 in each). The rats in model and treatment groups were injected with a single dose of vitamin D3 (600 000 U/kg) and fed with a high-fat diet. Basic chow was provided for normal control group. After a 6-week high-fat diet, the rats in treatment group were treated with n-3PUFAs at 250 mg · kg^-1·d^-1 by gastric tube. The serum lipid, aortal morphological changes, hemorheology, coagulation, nitric oxide (NO), total antioxidant capacity (T-AOC) and malonaldehyde (MDA) were detected after a 6-week n-3PUFAs diet. Results Compared with control group,model group rat total cholesterol (TC), low density cholesterol (LDL-C), plasma viscosity, whole blood viscosity, fibrinogen (FIB) and MDA concentrations were higher (all P 〈 0. 05 ), but activated partial thromboplastin time ( APTF), prothrombin time ( PT), thrombin time ( TT), erythrocyte deformation index( DI), plasma NO and T-AOC were lower (all P 〈 0. 05). Compared with model group, n-3PUFAs could reduce blood lipid levels, inhibit atherosclerotic plaque formation, decrease plasma viscosity [ ( 1.58 ± 0. 23 ) mPa · s vs (1.81±0.16) mPa· s], whole blood viscosity [(4.76 ±0.42)mPa · s vs (5.47±0.41)mPa · s, (4. 24 ±0. 32) mPa · s vs (4. 91 ±0. 39)mPa· s, (4. 04± 0. 29) mPa · s vs (4. 58 ±0. 33) mPa· s] and FIB [ (2.45 ± 0. 12) g/L vs ( 2. 65 ± 0. 13 ) g/L ], lower MDA content [ ( 10. 1 ± 0. 7 ) ·mol/ml vs ( 11.2 ± 0. 6) μmol/ml ], prolong APTT, PT and TT [ (29.04 ± 0.49 ) s vs ( 26. 46 ± 0. 25 ) s, ( 13.86 ± 0. 55 ) s vs ( 10. 71 ± 0. 34) s, (23.05 ± 0. 24) s vs ( 20. 90 ± 0. 68 ) s
出处
《中华医学杂志》
CAS
CSCD
北大核心
2010年第28期2004-2007,共4页
National Medical Journal of China
基金
中国医药卫生事业发展基金