检验医学 ›› 2017, Vol. 32 ›› Issue (4): 284-289.DOI: 10.3969/j.issn.1673-8640.2017.04.009

• 临床应用研究·论著 • 上一篇    下一篇

老年痴呆患者认知功能与维生素B12及叶酸的相关性

胡尧1, 郭启浩2, 岑屹1, 林瑶1   

  1. 1.复旦大学附属华山医院检验医学科,上海 200040
    2.复旦大学附属华山医院神经内科 复旦大学医学院神经生物学国家重点实验室,上海 200040
  • 收稿日期:2016-07-10 出版日期:2017-04-20 发布日期:2017-05-01
  • 作者简介:null

    作者简介:胡 尧,男,1982年生,主管技师,主要从事临床免疫学检验工作。

  • 基金资助:
    国家高技术研究发展计划(863计划)(2014AA022304)

Correlations of cognitive impairment with vitamin B12 and folic acid in elderly dementia patients

HU Yao1, GUO Qihao2, CEN Yi1, LIN Yao1   

  1. 1. Department of Clinical Laboratory,Huashan Hospital,Fudan University,Shanghai 200040,China
    2. Department of Neurology,Huashan Hospital,Fudan University/State Key Laboratory of Medical Neurobiology,Shanghai Medical College,Fudan University,Shanghai 200040,China
  • Received:2016-07-10 Online:2017-04-20 Published:2017-05-01

摘要:

目的 评估老年人群维生素B12和叶酸水平是否对轻度认知功能障碍(MCI)和阿尔兹海默症(AD)患者存在潜在影响。方法 采用化学发光微粒子免疫分析法检测191例年龄≥50岁的老年痴呆患者血清维生素B12和叶酸水平。以69名认知功能正常的人群作为正常对照组。探讨血清低水平维生素B12和叶酸是否是老年痴呆发生的危险因素。认知功能的评价采用目前通用的神经心理测试:中文版简易精神状态检查表(CMMSE)、记忆和执行筛选量表(MES)。采用Pearson相关分析评估血清维生素B12及叶酸水平与各组年龄、受教育年限、体重指数(BMI)和认知功能的相关性,采用Logistic回归分析评估血清维生素B12、叶酸与老年痴呆患病风险的关系。结果 191例老年痴呆患者中54例为MCI、137例为AD,其中有78.1%的患者维生素B12和叶酸水平正常,有6.1%的患者维生素B12低于参考区间下限,有5.8%的患者叶酸水平低于参考区间下限;另有10.0%的患者维生素B12或叶酸水平高于参考区间上限。作各协变量调整后,MCI和AD患者血清维生素B12及叶酸水平与CMMES和MES评分无相关性(P>0.05)。但低血清维生素B12水平与AD患病风险相关[比值比(OR)=2.869,95%可信区间(CI) 1.123~7.333]。结论 血清维生素B12和叶酸水平与MCI或AD患者认知功能之间无明显关联。低水平维生素B12可能通过某种机制增加AD患病风险。

关键词: 维生素B12, 叶酸, 阿尔兹海默症, 认知功能障碍

Abstract:

Objective To investigate the correlations of vitamin B12 and folic acid with mild cognitive impairment (MCI) and Alzheimer's disease(AD). Methods Serum vitamin B12 and folic acid levels were determined by chemiluminescence microparticle immunoassay in 191 elderly dementia patients ≥ 50 years old and 69 cognitive normal subjects(normal control group). The low levels of vitamin B12 and folic acid as high-risk factors for AD were analyzed. Cognitive function was evaluated with comprehensive neuropsychological tests,such as Chinese Version of Mini Mental State Examination(CMMSE) and the Memory and Executive Screening(MES). Pearson's correlation analysis was performed to evaluate the relationship among serum vitamin B12,folic acid,age,education year,body mass index(BMI) and cognitive function in all groups. Logistic regression was used to evaluate the association of vitamin B12 and folic acid with MCI and AD. Results A total of 54 patients with MCI and 137 patients with AD were determined. There were 78.1% patients with normal vitamin B12 and folic acid levels,6.1% patients with low vitamin B12 level,5.8% patients with low folic acid level,and 10.0% with high vitamin B12 or folic acid level. Vitamin B12 or folic acid level had no correlation with CMMSE and MES scores after covariates' adjustments(P>0.05). Low vitamin B12 level was correlated with the risk of AD [odds ratio(OR)=2.869,95% confidence interval(CI)1.123-7.333]. Conclusions Vitamin B12 and folic acid are not correlated with cognitive impairment. However,low vitamin B12 level may be correlate with an increased risk for AD.

Key words: Vitamin B12, Folic acid, Alzheimer's disease, Cognitive impairment

中图分类号: