检验医学 ›› 2020, Vol. 35 ›› Issue (1): 1-5.DOI: 10.3969/j.issn.1673-8640.2020.01.001

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北京地区晚发性阿尔兹海默病患者apo E基因多态性与血脂的相关性

洪萍, 王培昌()   

  1. 首都医科大学宣武医院检验科,北京 100053
  • 收稿日期:2018-11-18 出版日期:2020-01-30 发布日期:2020-02-28
  • 作者简介:作者简介:洪 萍,女,1980年生,博士,主管技师,主要从事阿尔兹海默病生物标志物的研究。
  • 基金资助:
    国家自然科学基金青年项目(81501841)

Correlation between biochemical parameters and apolipoprotein E genotypes among inpatients with late-onset Alzheimers disease in Beijing

HONG Ping, WANG Peichang()   

  1. Department of Clinical Laboratory,Xuanwu Hospital,Capital Medical University,Beijing 100053,China
  • Received:2018-11-18 Online:2020-01-30 Published:2020-02-28

摘要:

目的 探讨晚发型阿尔兹海默病(LOAD)患者载脂蛋白E(apo E)基因多态性与血脂水平之间的关系。方法 采用基因芯片法检测150例LOAD患者(LOAD组)及150名体检健康者(正常对照组)apo E基因多态性,同时检测总胆固醇(TC)、三酰甘油(TG)、低密度脂蛋白胆固醇(LDL-C)、小而密低密度脂蛋白胆固醇(sd-LDL-C)、高密度脂蛋白胆固醇(HDL-C)、载脂蛋白B(apo B)、脂蛋白(a)[Lp(a)]水平。采用多因素非条件Logistic回归分析筛选LOAD的相关危险因素。结果 LOAD组E2/3和E3/3基因型频率均低于正常对照组(P<0.05),E3/4和E2/4基因型频率均高于正常对照组(P<0.01)。LOAD组ε3等位基因频率低于正常对照组(P<0.05),ε4等位基因频率高于正常对照组(P<0.01)。与正常对照组比较,LOAD组TC、LDL-C和sd-LDL-C水平明显升高(P<0.01),HDL-C水平明显降低(P<0.01),其他血脂项目差异均无统计学意义(P>0.05)。TC及LDL-C水平在LOAD组ε2、ε3和ε4表型患者中依次升高(P<0.05)。正常对照组ε4表型LDL-C水平明显高于ε2表型(P<0.05)。apo E ε4等位基因和LDL-C升高是LOAD发生的危险因素[比值比(OR)值分别为14.454、5.824,95%可信区间(CI)分别为5.793~16.368、2.582~7.973],HDL-C升高则是LOAD的保护因素(OR=0.020,95%CI 为0.006~0.352)。结论 apo E基因多态性与脂质代谢密切相关,ε4等位基因可能是LOAD发病的重要遗传因素之一。

关键词: 载脂蛋白E, 基因多态性, 阿尔兹海默病, 血脂

Abstract:

Objective To investigate the correlation between the gene polymorphism of apolipoprotein E(apo E) and blood lipid levels in late-onset Alzheimers disease(LOAD) patients. Methods The apo E gene polymorphism was determined by gene chip in 150 LOAD patients and 150 healthy subjects. Total cholesterol(TC),triglyceride(TG),low-density lipoprotein cholesterol(LDL-C),small and dense low-density lipoprotein cholesterol(sd-LDL-C),high-density lipoprotein cholesterol(HDL-C),apolipoprotein B(apo B) and lipoprotein (a)[Lp(a)] levels were also determined. Multivariate unconditional Logistic regression analysis was used to screen the related risk factors of LOAD. Results The frequencies of E2/3 and E3/3 genotypes in LOAD group were lower than those in healthy control group(P<0.05),and the frequencies of E3/4 and E2/4 genotypes were higher than those in healthy control group(P<0.01). The frequency of ε3 allele in LOAD group was lower than that in healthy control group(P<0.05),and the frequency of ε4 allele in LOAD group was higher than that in healthy control group(P<0.01). Compared with healthy control group,the levels of TC,LDL-C and sd-LDL-C were increased(P<0.01),while HDL-C was decreased(P<0.01) in LOAD group. There was no statistical significance in the other blood lipids(P>0.05). The levels of TC and LDL-C were gradually increased in LOAD patients with the phenotypes of ε2,ε3 and ε4(P<0.05). The LDL-C level of ε4 phenotype was higher than that of ε2 phenotype in healthy control group(P<0.05). The apo E ε4 allele and LDL-C were the risk factors for LOAD,the odds ratios(OR) were 14.454 and 5.824,and 95% confidence intervals(CI) were 5.793-16.368 and 2.582-7.973,respectively. HDL-C was the protective factor for LOAD(OR=0.020,95% CI 0.006-0.352). Conclusions The apo E gene polymorphism is closely related to lipid metabolism,and the apo E ε4 allele may be one of the important genetic factors in the pathogenesis of LOAD.

Key words: Apolipoprotein E, Gene polymorphism, Alzheimers disease, Blood lipid

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