长寿与非长寿者子代血脂水平及与apoE基因多态性的关系

目的　探讨遗传基因与血脂谱水平差异的关系。方法　对比分析 7个维吾尔族长寿家系的 86名子孙与 9个维吾尔族非长寿家系的 6 2名子孙的血脂谱水平和apoE等位基因频率分布差异 ,以及apoE基因多态性与血脂谱水平的关系。结果　调整年龄、工作性质后 ,长寿家系子孙不论男女 ,血脂谱中与动脉硬化呈正相关的指标均低于非长寿家系子孙 ,而与动脉硬化呈负相关的指标均高于非长寿家系子孙。其中男性甘油三酯 (1 49± 0 14)mmol/L、apoB(0 83± 0 0 4)g/L均显著低于非长寿家系子孙的 (2 11± 0 17)mmol/L和 (1 0 2± 0 0 5 )g/L ,高密度脂蛋白 胆固醇 /低密度脂蛋白 胆固醇 (0 74± 0 0 4)显著高于非长寿家系子孙 (0 5 9± 0 0 5 ) ,女性apoA/apoB(1 74± 0 0 8)显著高于非长寿家系子孙 (1 42± 0 0 9)。长寿家系子孙中等位基因ε4的相对频率 (5 8)显著低于非长寿家系子孙(16 1)。进一步分析发现 ,ε4等位基因携带者血清中总胆固醇、低密度脂蛋白 胆固醇、apoB水平显著高于其他等位基因携带者。结论　长寿家系子孙血脂谱综合指标优于非长寿家系子孙 ,apoE等位基因多态性可以部分地解释形成这种差异的原因

Relationship between blood lipid level and apolipoprotein E gene polymorphism in offspring from longevity and non-longevity families

OBJECTIVE: To study relationship between genetic factor and level of blood lipid. METHODS: Levels of blood lipid and difference in apolipoprotein E (apo-E) allele frequencies were compared in 86 offspring in seven Uigur longevity families and 62 offspring in nine Uigur non-longevity families and their relationship was explored. RESULTS: After adjustment for age and occupation, blood indicators related to atherosclerosis were all lower in the offspring of longevity families than in non-longevity families, and those correlated inversely with it were higher in the former. Blood levels of triglyceride and apo-B were significant lower (P < 0.05) and the ratio of HDL-ch to LDL-ch was significantly higher (P < 0.05) in male offspring of longevity families than of non-longevity families. The ratio of apo-A to apo-B was significantly higher in female offspring of longevity families than of non-longevity families. Frequency of epsilon4 allele also was significantly fewer in the offspring of longevity families than of non-longevity ones (P < 0.01). Also, analysis showed that individuals with epsilon4 allele had higher levels of serum total cholesterol, lower density lipoprotein cholesterol and apo-B than those with other alleles. CONCLUSION: Average level of blood lipid was better in the offspring of longevity families than that of non-longevity families. apo-E allele polymorphism can in part explain its difference.