老年高血压并抑郁症与儿茶酚胺氧位甲基转移酶基因多态性的相关性研究

摘要

目的 探讨儿茶酚胺氧位甲基转移酶(COMT)基因多态性与老年高血压并抑郁症发生之间的相关性.方法 选择2010年1月至2014年7月间在云南省昆明医科大学附属延安医院老年病科和云南省精神病院临床心理科住院的昆明汉族老年高血压并抑郁症患者(老年高血压并抑郁组)98例,同期选择昆明汉族老年高血压患者(老年高血压组)100例和老年健康人(老年对照组)100例作为研究对象,应用聚合酶链反应-限制性内切酶片段长度多态性(PCR-RFLP)法检测COMT基因1947位点的多态性分布频率并进行分析.结果 与老年对照组比较,老年高血压并抑郁症组COMT 1947位点AA、AG基因型频率(28.57％、51.02％)明显高于老年对照组(19.00％、39.00％,P＜0.01).老年高血压并抑郁症组携带A等位基因的频率(54.08％)较老年对照组高(38.50％,P＜0.01).携带A等位基因人群发生高血压并抑郁症的风险是G等位基因的1.881倍(OR=1.881,95％CI:1.261～2.807,P＜0.01);老年高血压组与老年高血压并抑郁症组各基因型频率比较差异无统计学意义(P＞0.05).但两组间A与G等位基因频率比较差异有统计学意义(P＜0.05).高血压并抑郁组携带A等位基因的频率(54.08％)较老年高血压组(42.50％)高,且携带A等位基因人群发生抑郁症的风险是G等位基因的1.593倍(OR=1.593,95％ CI:1.071～2.37,P＜0.01).结论 COMT基因多态性可能与老年高血压并抑郁症的发生相关,检测老年高血压患者COMT基因1947位点基因型,可以作为预测抑郁症发生的一项重要指标.%Objective To explore the correlation between catechol-O-methyltransferase (COMT) gene polymorphism and the occurrence of senile hypertension with depression.Methods Ninety-eight Han inpatients with senile hypertension complicating depression(elderly hypertension complicating depression group) in our hospitals from January 2010 to July 2014 were selected and contemporaneous 100 Han cases of senile hypertension(elderly hypertension group) and 100 healthy Han elderly people(elderly control group) served as the study subjects.PCR-RFLP was employed to detect COMT gene 1947 locus polymorphism distribution frequency for conducting analysis.Results The genotype frequencies of AA and AG at COMT 1947 locus in the elderly hypertension complicating depression group were significantly higher than those in the elderly control group(28.57 ％,51.02 ％ vs.19.00 ％,39.00％,P＜0.01).The A allele frequency in the elderly hypertensive complicating depression group was significantly higher than that in the elderly control group(54.08％ vs.38.50％,P＜0.01).The risk of hypertension complicating depression occurrence in the population carrying A allele was 1.881 times that of carrying G allele(OR =1.881,95 ％ CI:1.261-2.807,P＜0.01).The various genotypes frequencies had no statistical difference between the elderly hypertension group and elderly hypertension complicating depression group(P＞0.05).However,the COMT 1947A/G allele frequencies had statistical difference between the two groups (P＜0.05).The A allele frequencies in the hypertension complicating depression group was 54.08％,which was higher than 42.50％ in the elderly hypertension group (P＜0.01),moreover the risk of depression occurrence in the population carrying A allele was 1.593 times that of carrying G allele(OR=1.593,95％CI:1.071-2.37,P＜0.01).Conclusion COMT gene polymorphism could have correlation with the occurrence of elderly hypertensive complicating depression.Detecting COMT 1947 locus genotype in elderly patients with hypertension can serve as an important indicator for predicting depression occurrence.