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ID:15157003
大小:38.01 KB
页数:10页
时间:2018-08-01
《叶酸、维生素b12对冠心病患者血清同型半胱氨酸、一氧化氮水平的影响》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、叶酸、维生素B12对冠心病患者血清同型半胱氨酸、一氧化氮水平的影响【摘要】目的:探讨叶酸、维生素B12对冠心病伴高同型半胱氨酸(Hcy)血症患者的血清Hcy、一氧化氮(NO)水平的影响。方法:采用酶联免疫法测定冠心病组(98例)患者和正常对照组(57例)空腹血清Hcy水平,应用亚硝酸盐还原酶法测定其血清NO水平。69例高Hcy血症的冠心病患者(Hcy≥15μmol/L)随机分为对照组(30例,仅服用硝酸酯类、他汀类及阿司匹林等基础药物)、干预组(39例,除基础用药外加用叶酸5mg/d、维生素B12500μg/d口服),治疗前及治疗4周
2、后测定患者空腹血清Hcy、NO水平。结果:冠心病组患者血清Hcy水平明显高于正常对照组(P<0.01),NO水平明显低于正常对照组(P<0.05),冠心病组血清Hcy水平与NO水平呈明显负相关(r=-0.72,P<0.05),干预组患者治疗4周后Hcy水平平均降低了36.4%,治疗前、后Hcy水平差异有统计学意义(P<0.01),NO水平与服药前相比明显升高(P<0.05),治疗4周后对照组Hcy及NO水平亦有变化,但差异无统计学意义(P>0.05)。结论:冠心病患者Hcy水平升高,NO水平降低,口
3、服叶酸、维生素B12可明显降低冠心病患者高Hcy血症者的血浆Hcy水平,改善冠心病患者内皮功能。【关键词】叶酸;维生素B12;高同型半胱氨酸血症;一氧化氮;冠心病1[ABSTRACT]Objective:TostudytheeffectsoffolicacidandvitaminB12onserumhomocysteine(Hcy)andnitricoxide(NO)levelsinCHDpatientswithhyperhomocysteinemia.Methods:SerumHcylevelsweredeterminedbyELI
4、SA,andappllicationofNitritereductasedeterminationoftheconcentrationNOinCHDpatientsandcontrols.ThepatientswhoseserumHcylevelswerehigherthan15μmol/Lweredividedintotherapygroupandcontrolgroup.Thepatientsintherapygroupweregivenfolicacid5mg,vitaminB120.5mgperday,whilethepati
5、entsincontrolgroupwerenotgiven.HcyandNOlevelswereallexaminedfourweekslateragain.Results:MeanserumHcylevelwassignificantlyhigherincoronarypatientsthanincontrols,whilethecontentofNOwaslowerinobservedgroupthanincontrolgroupandthedifferenceweresignificantincontrast(P<0.0
6、1).TherewasnegativecorrelationbetweenthedecreasingextentofHcylevelsandNOconcentrations(r=-0.72,P<0.05).Hcylevelsofthepatientsintherapygroupweredecreasedby36.4%fourweekslater.Therewassignificantdifferencebetweenthelevelsbeforeandaftertherapy(P<0.01).Conclusions:Hcy
7、levelsinCHDpatientsweremarkedlyhigherthanthoseincontrolgroup.Supplementoffolicacid,vitaminB12candecreaseserumHcylevelsinCHDpatientswithhyperhomocysteinemia.The2mechanismcouldbeimprovedendothelialfunctioninCHDpatients.[KEYWORDS]Folicacid;VitaminB12;Hyperhomocysteinemia;N
8、itricoxide;Coronaryheartdisease动脉粥样硬化是冠心病(CHD)发病的病理基础,有关动脉粥样硬化的确切机制仍在不断地探索中。研究发现高同型半胱氨酸(homocysteine,Hcy)是动脉粥样
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