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叶酸对老年冠心病患者外周血内皮祖细胞数量及功能的影响

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摘要 目的探讨老年冠心病患者口服叶酸治疗对外周血内皮祖细胞(EPCs)数量及功能的影响。方法选择初次诊断为冠心病的老年患者60例,随机分为治疗组和对照组,每组30例,在规范的冠心病二级预防基础上,治疗组给予叶酸5 mg/d口服,对照组口服安慰剂。在入院时、服药4 w及8 w时检测两组患者的同型半胱氨酸(Hcy)和血流介导的内皮舒张功能(FMD)水平,并利用外周血分离单个核细胞进行体外诱导培养,分别观察其集落形成、增殖及迁移能力。结果 Di L-ac LDL(红色)和FITC-UEA-1(绿色)染色双阳性的细胞可鉴定为EPCs。与对照组比较,治疗组治疗8 w EPCs数量、迁移及增殖能力显著增高[(67.70±4.09)个vs(48.92±3.55)个,(34.03±3.43)%vs(27.54±4.24)%,(0.67±0.04)%vs(0.54±0.04)%,P<0.05],FMD水平显著增高[(7.63±1.67)%vs(5.36±1.33)%,P<0.05],Hcy水平显著降低[(10.37±0.84)μmol/L vs(12.23±0.74)μmol/L,P<0.05]。EPCs数量、迁移、增殖能力与Hcy水平呈负相关(r=-0.668,P<0.05;r=-0.657,P<0.05;r=-0.775,P<0.05),FMD水平与Hcy水平呈负相关(r=-0.718,P<0.05)。结论老年冠心病患者口服叶酸可增高外周血EPCs的数量、迁移及增殖能力,改善血流介导的FMD,这可能与叶酸降低Hcy水平有关。
出处 《中国老年学杂志》 CAS 北大核心 2017年第17期4216-4218,共3页 Chinese Journal of Gerontology
基金 广东省医学科研基金(No.A2011722) 广东省科技厅社会引导发展项目(No.2011B031800011)
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