【摘要】 目的研究动脉粥样硬化性脑梗死(ACI)发病与低密度脂蛋白(LDL)亚组分颗粒直径大小之间的关系。方法梯度密度超速离心32例ACI患者及32例对照者的血浆LDL,采用2.5%～16.0%聚丙烯酰胺凝胶梯度电泳分析LDL颗粒直径、分布及电泳图形。结果①ACI组三酰甘油(TG),总胆固醇(TC),低密度脂蛋白胆固醇(LDL-C)及载脂蛋白B(ApoB)较对照组明显升高(t=4.03～8.37,P<0.01)。②ACI组LDL颗粒直径犤(24.8±0.7)nm犦较对照组犤(26.0±0.6)nm犦明显变小(t=4.78,P<0.01);两组间A型、B型的分布不同,B型LDL在ACI组分布明显高于对照组(t=6.80,P<0.05)。③ACI组小而密LDL亚组分相对含量犤(50±10)%犦较对照组犤(17±10)%犦明显增多(t=7.76,P<0.001)。④ACI组LDL亚组分颗粒直径与TG(r=-0.47,P<0.01),TC(r=-0.51,P<0.01),LDL-C(r=-0.36,P<0.05),ApoB(r=-0.46,P<0.05)呈负相关。结论ACI组LDL以小颗粒的B型为主,与ACI发生密切相关,TG水平对LDL颗粒直径大小、组成具有调节作用。更多还原

【Abstract】 AIM:To study the corre la tion of the diame ter of small LDL particles with the incidence of atheroscleros ic cerebral infarction(ACI ).METHODS:The LDL plasmas were obtained by usin g density ladder supercentryfugation method in 32ACI patients and another 32h ealthy persons in the control group.The dia meter,distribution and electrophor esis areas graphs of the LDL particles were analyzed by using 2.5%-16.0 %non-denaturing polyacylamide grad ient gels electrophresised method.RESULTS :①The levels of TG,TC,LDL-C,and Apo B i n ACI group were significantly hig h(t=4.03-8.37,P<0.01).②The mean diameter of LDL particles in ACI group(24.8±0.7)nmwere more smaller than the mean diameter in the control group(26.0±0.6)nm,t=4.78,P<0.01;the distr ibution of A and B pattern s ubfraction between the two groups was different,t he distribut ion of B pattern LDL subfraction in ACI group was more significantl y high th an that in the control group.(t=6.80,P<0.05).③The rela tive percentage of small and density LDL particles in the ACI group(50±10 )%increased more significantly than that in the control group(t=7.76,P <0.001).④There were negatively correlations between the diameter of LDL subfraction in ACI group with TG(r=-0.47,P<0.01),TC(r=-0.5 1,P<0.01),LDL-C(r=-0.36,P<0.05)and Apo B(r=-0.46 ,P<0.05).更多还原