血管性认知功能障碍与C-反应蛋白、同型半胱氨酸、维生素B12及叶酸的相关性研究

目的 探讨血管性认知功能障碍(vascular cognitive impairment,VCI)患者血C-反应蛋白(CRP)、血浆同型半胱氨酸(homocystine,Hcy)、VitB12、叶酸(folic acid,FA)水平的差异及其与认知功能障碍严重程度的相关性。方法 选择2014年12月～2016年6月南京鼓楼医院集团宿迁市人民医院神经内科门诊及住院患者共100例,根据MoCA量表评分划分为3组,具体为正常对照(normal control,NC)组30例、非痴呆型血管性认知障碍(vascular cognitive impairment no dementia, VCIND)组 39例和血管性痴呆(vascular dementia,VD)组31例; 所有患者均取晨起空腹肘静脉血测定血CRP、血Hcy、VitB12、FA水平。结果(1)VCIND组患者 CRP和Hcy水平较NC组高,VtimaniB12和血清FA水平较NC组低(P<0.05);(2)VD组患者与VCIND组患者比较血CRP和Hcy水平明显升高(P<0.05),血VitB12和血FA水平明显下降(P<0.05);(3)VD组患者CRP和Hcy水平较NC组高,VtimaniB12和血清FA水平较 NC组低(P<0.01);(4)VCI(VD组+VCIND组)患者血CRP、Hcy水平与MoCA量表评分呈负相关(r=-0.56,P<0.05),血VitB12和FA水平与MoCA量表评分无明显相关性(r=0,P>0.05)。结论 VCI患者血清CRP水平升高,血浆Hcy水平升高与VCI具有相关性,血CRP水平升高及高Hcy可能是VCI发病及认知损害进展的重要因素。     

丙戊酸钠和卡马西平对癫痫患者血同型半胱氨酸、叶酸、维生素B12水平的影响

目的探讨丙戊酸钠(VPA)和卡马西平(CBZ)对癫痫患者血同型半胱氨酸(Hcy)、叶酸、维生素(Vit)B12水平的影响。方法检测VPA组、CBZ组、未服药组患者和正常对照组血Hcy、叶酸、VitB12浓度,并对结果进行比较。结果与未服药组及正常对照组比较,VPA组和CBZ组的血浆Hcy水平显著升高(均P<0.01),血清叶酸水平显著降低(均P<0.05);且VPA组血清VitB12水平有升高趋势,CBZ组血清VitB12水平有降低趋势,但差异均无统计学意义。结论 VPA和CBZ可引起癫痫患者的血浆Hcy水平升高和血清叶酸水平降低,对血清VitB12水平无显著影响。     

血浆同型半胱氨酸水平及MTHFR基因多态与血管性痴呆的关系

目的探讨血浆同型半胱氨酸(H cy)水平及M THFR基因多态与血管性痴呆(VD)的关系。方法应用高效液相色谱仪和电化学检测法测定37例VD患者的血浆总H cy水平,并与40例同龄对照组及40例非痴呆脑梗死组比较,运用多聚酶链反应-限制性内切酶片段长度多态性技术(PCR-RFLP)检测M THFR基因多态性,同时测定血浆叶酸及维生素B12水平。结果VD患者血浆总H cy水平显著高于同龄对照组(P<0.001)和非痴呆脑梗死组(P<0.05);M THFR基因型有3种,即纯合子(T/T)型,杂合子(T/C)型,纯合子(C/C)型。3组基因型和等位基因频率相比,差异均无显著性(P>0.05);VD组血浆叶酸及维生素B12水平明显低于同龄对照组(P<0.05)和非痴呆脑梗死组(P<0.05)。结论高同型半胱氨酸血症是VD发病的一个新的危险因素。     

急性脑梗死患者血浆同型半胱氨酸、叶酸、维生素B12水平的测定及其临床意义

目的 探讨血浆同型半胱氨酸(Hcy)在急性脑梗死发病过程中的临床意义以及与病情、伴发症、叶酸、维生素B_(12)之间的关系。方法 采用化学发光法测定急性脑梗死患者血浆Hcy、叶酸、维生素B_(12)水平,并与对照组进行比较。结果急性脑梗死组血浆Hcy水平明显高于对照组(P<0.001),叶酸明显低于对照组(P<0.001);重型患者血浆Hcy水平明显高于中型及轻型患者(P<0.01,0.01),叶酸明显低于中型及轻型患者(P<0.01,0.05);伴发高血压病的患者血浆Hcy水平明显高于非高血压病的患者(P<0.05);急性脑梗死组血浆Hcy与叶酸、维生素B_(12)呈负相关(P<0.01,0.01);对照组血浆Hcy与叶酸呈负相关(P<0.05)。结论高Hcy血症是脑梗死的一个新的重要危险因素;Hcy水平与病情密切相关,与叶酸、维生素B_(12)呈负相关。     

高同型半胱氨酸血症及其相关因素与青年脑梗死的关系

目的探讨同型半胱氨酸(homocysteine,Hcy)及其相关因素与青年脑梗死的关系。方法比较40例青年脑梗死患者(初发年龄<=45岁),30例神经系统非血管性疾病(NVD)患者和30例健康人血浆Hcy水平。分析年龄、性别、体重指数、肝肾功能、吸烟、嗜酒、血清VitBl2、叶酸水平的影响。结果脑梗死组血浆Hcy水平(21.4±18.8umol/L)分别与神经系统非血管疾病组(10.2±5.0umol/L)和健康对照组(12.9±8.6umol/L)比较差异均有显著性(P<0.01)。叶酸、VitB12与Hcy呈负相关,二者的降低与青年脑梗死关系密切(P<0.01)。血肌苷增高和吸烟与Hcy增高有关(P<0.05)。男性Hcy显著高于女性(P<0.05)。结论Hcy和青年脑梗死密切相关,与叶酸、VitBl2呈负相关,与肌苷呈正相关。男性、吸烟也与Hcy增高有关。     

高同型半胱氨酸血症与脑梗死危险因素的相关性研究

目的探讨高同型半胱氨酸血症与脑梗死危险因素的相关性。方法选取82例脑梗死患者为观察组,选取同期体检中心健康体检者80例为对照组,比较2组血浆同型半胱氨酸(Hcy)、叶酸(FA)、颈动脉内膜中层厚度(IMT)等,探讨血浆Hcy与脑梗死危险因素的相关性。结果2组Hcy、甘油三酯(TG)、总胆固醇(TC)、IMT、收缩压(SBP)、舒张压(DBP)、FA、维生素B12(VitB12)差异有统计学意义(P0.05);相关性分析发现,Hcy与FA、VitB12呈负相关,与IMT呈正相关(P0.05)。结论高同型半胱氨酸血症与脑梗死显著相关,且导致患者高同型半胱氨酸血症与叶酸及维生素B12含量下降有关。     

血浆同型半胱氨酸与脑梗死的相关性研究

目的探讨血浆同型半胱氨酸水平对脑梗死的影响。方法采用高效液相色谱仪HPLC-FD法检测40例急性脑梗死患者的血浆Hcy,采用离子捕获法测定患者叶酸（Fol）、维生素B12（VitB12）等指标,与40名健康对照者比较。结果 脑梗死组血浆Hcy水平和甘油三酯（TG）明显高于对照组,而Fol及VitB12水平则低于对照组,差异有统计学意义（P〈0.05）。高Hcy血症与脑梗死相关,相对危险度OR为8.921（95%CI 2.16～30.32）,脑梗死组和对照组血浆Hcy水平与血Fol、VitB12水平均呈显著负相关。结论 高同型半胱氨酸血症是脑梗死的独立危险因素。     

川西北地区老年脑梗死与血浆同型半胱氨酸的相关性

目的 研究血浆同型半胱氨酸(Hcy)与川西北地区老年脑梗死发病的相关性.方法 测定川西北地区脑梗死患者60例和对照组60例的血浆Hcy水平.结果 观察组较对照组的血浆Hcy水平明显上升,有统计学意义(P<0.05),观察组的叶酸浓度及维生素B12水平较对照组低(P<0.05).结论 血浆同型半胱氨酸升高与川西北地区脑梗死的发病增加相关.     

叶酸、维生素B_(12)治疗高同型半胱氨酸血症对颈动脉粥样硬化的影响

目的观察叶酸、维生素B12治疗高同型半胱氨酸(Hcy)血症脑梗死患者对颈动脉粥样硬化的影响。方法高同型半胱氨酸脑梗死患者122例,随机分为研究组(65例),对照组(57例),研究组每日给予叶酸5mg,维生素B12500ug干预治疗,对照组不给予叶酸和维生素B12治疗,分别于入院时、治疗12、24及36个月测定血清Hcy、叶酸和维生素B12浓度,并进行颈动脉斑块积分及斑块类型超声检查。结果 (1)研究组第12、24、36个月血清Hcy水平较治疗前显著降低(p<0.01),叶酸及维生素B12浓度较治疗前显著性升高(p<0.01),对照组血清同型半胱氨酸、叶酸、维生素B12浓度无明显变化(p>0.05),两组间同一时期比较有显著性差异(p<0.01);(2)研究组随着疗程延长,颈动脉斑块积分减少且有显著性差异(p<0.05,),对照组颈动脉斑块积分增加且有显著性差异(p<0.05);两组间同期颈动脉斑块积分比较有显著性差异(p<0.01);(3)研究组随着疗程延长,颈动脉不稳定性斑块率呈下降趋势,有显著性差异(p<0.05);对照组颈动脉不稳定性斑块率呈上升趋势,有显著性差异(p<0.05);研究组与对照组第12、24及36个月相比不稳定斑块率差异有显著性(p<0.05、p<0.01)。结论叶酸、维生素B12可降低高同型半胱氨酸脑梗死患者同型半胱氨酸水平,可改善颈动脉粥样硬化程度,有稳定斑块作用。     

MTHFR基因C677T位点突变及高同型半胱氨酸血症和血管性痴呆的发生相关性

目的研究血浆同型半胱氨酸(Hcy)浓度及亚甲基四氢叶酸还原酶(MTHFR)基因多态性与血管性痴呆(VaD)的关系。方法选取83例VaD患者作为观察组和81例非痴呆脑梗死患者作为对照组,分别测定两组患者的MTHFR基因多态性、Hcy浓度、维生素B12和叶酸水平,根据简易精神状态检查量表(MMSE)评定VaD患者痴呆程度,对指标进行比较和相关性分析。结果 MTHFR基因TT纯合子在观察组VaD患者的分布频率明显高于对照组,差异具有统计学意义(P0.05);两组患者的MTHFR基因C、T等位基因分布频率差异具有统计学意义(P0.05)。观察组VaD患者的血浆Hcy浓度明显高于对照组,其血清叶酸与维生素B12浓度明显低于对照组,VaD患者的血浆Hcy水平随着痴呆程度的增加而明显提高,差异均具有统计学意义(P0.05)。VaD患者血浆Hcy水平与自身痴呆程度呈正相关(r=0.452,P0.05),与MMSE评分呈负相关(r=-0.246,P0.05)。结论MTHFR基因C677T突变及高水平Hcy与VaD的发生、发展相关,高Hcy血症是VaD发病的一个重要因素。     

血管性痴呆患者血清MMP-9,NLRP3,Hcy水平变化及其与认知、神经功能、预后的关系

目的 探讨血管性痴呆(VD)患者血清基质金属蛋白酶(MMP)-9、核苷酸结合寡聚化结构域样受体蛋白3(NLRP3)、同型半胱氨酸(Hcy)水平变化及其与认知、神经功能、预后的关系。方法 选取2018年1月-2020年4月本院82例VD患者为观察组,同期82例体检健康者为对照组,测定对照组、观察组不同认知功能、神经功能状况、预后(出院6个月后神经功能障碍程度)患者血清MMP-9,NLRP3,Hcy水平,应用Pearson相关性分析观察血清各指标水平与VD患者MMSE,NIHSS评分的关联性,Logistic回归分析探讨VD患者预后功能障碍分级为Ⅲ级的影响因素,绘制受试者工作特征(ROC)曲线探讨血清各指标水平对VD患者预后功能障碍分级为Ⅲ级的预测价值。结果 观察组血清MMP-9,NLRP3,Hcy水平高于对照组,且观察组预后功能障碍分级为Ⅲ级患者血清MMP-9,NLRP3,Hcy水平高于Ⅰ～Ⅱ级患者(P<0.05); 随观察组MMSE评分增高其血清MMP-9,NLRP3,Hcy水平逐渐降低,随NIHSS评分增高其血清各指标水平也逐渐增高(P<0.05); Pearson相关性分析显示,VD患者血清各指标水平与MMSE评分呈负相关(r=-0.600、-0.786、-0.624,P<0.05),与NIHSS评分呈正相关(r=0.588、0.633、0.476,P<0.05); Logistic回归分析显示,MMSE评分为VD患者预后功能障碍分级为Ⅲ级的重要保护因素,NIHSS评分、血清MMP-9,NLRP3,Hcy水平为VD患者预后功能障碍分级为Ⅲ级的重要危险因素(P<0.05); 绘制ROC曲线显示,血清MMP-9,NLRP3,Hcy水平联合预测VD患者预后功能障碍分级为Ⅲ级的敏感度为82.35%,特异度为83.08%。结论 VD患者血清MMP-9,NLRP3,Hcy水平可显著增高,且增高幅度与认知、神经功能有关,预测预后的价值较高。     

Serial measurements of plasma homocysteine levels in early and late phases of ischemic stroke

High plasma levels of homocysteine (Hcy) may predispose to ischemic stroke (IS), but results of previous studies have been conflicting. We decided to determine in IS patients whether their Hcy levels are elevated, whether levels vary at different time points following stroke, whether levels are associated with stroke severity, outcome, recurrence, etiology, infarct volume, or risk factors, and whether levels are correlated with hemostatic factors or C-reactive protein values. We measured plasma Hcy levels in 102 consecutive IS patients on admission and at 1 week, 1 month, and 3 months after stroke and once in 102 control subjects. Hemostatic factors were measured in 55 patients. Compared with controls, plasma Hcy levels in patients were significantly lower on admission but not at later time points, with levels increasing by week and remaining at this level for 3 months. Hcy levels showed a positive correlation with age and a negative correlation with Mini-Mental State Examination (MMSE) scores. Plasma Hcy levels inversely correlated with plasminogen activator inhibitor type-1. Decreased Hcy levels on admission may reflect the strength of the acute-phase response rather than a pathogenetic event. The negative correlation between Hcy levels and MMSE scores is more probably age-related than stroke-related.     

Tissue factor and homocysteine levels in ischemic heart disease are associated with angiographically documented clinical recurrences after coronary angioplasty

BACKGROUND: In ischemic heart disease (IHD) patients high plasma levels of Tissue Factor (TF), the trigger of coagulation cascade, are present. Homocysteine (Hcy) is a risk factor for coronary artery disease, and several different pathophysiological mechanisms by which Hcy may play a role in thrombus formation have been postulated in "in vitro" studies. We investigated the "in vivo" role of Hcy in affecting plasma levels of TF, its inhibitor Tissue Factor Pathway Inhibitor (TFPI) and hypercoagulability. METHODS AND RESULTS: We investigated 119 IHD patients who underwent PTCA and compared them with 103 healthy subjects. TF, TFPI, Thrombin-Antithrombin complexes (TAT) and Hcy levels were significantly higher in the patients than in the controls. A positive correlation was found between Hcy and TF (r = 0.54; p < 0.0001), Hcy and TFPI (r = 0.26; p <0.05) as well as Hcy and TAT (r = 0.33; p <0.0001) levels. An inverse correlation existed between folate intake and Hcy levels (r = -0.28; p = 0.001). Hcy levels within the first quartile and in the highest quartile were associated with a lower (p < 0.001) and higher (p <0.0001) rate of clinical recurrences, respectively. Patients with TF values in the first quartile had a lower rate of angiographically documented clinical recurrences as compared to those in the fourth quartile (p <0.01); those in the highest quartile of TF showed a higher rate of recurrences (p = 0.001). Multivariate analysis confirmed these results (first quartile of Hcy: OR 0.02, C1 0.002-0.27; fourth quartile of Hcy: OR 36.5, C1 3.6-365/first quartile of TF: OR 0.006, C1 0.001-0.44; fourth quartile of TF: OR 16.4, C1 3.0 - 90.0), also after adjustment for risk factors and Hcy and TF respectively. CONCLUSIONS: In this study we show that TF, TFPI and TAT levels are correlated with Hcy plasma levels in IHD patients, providing evidence of an "in vivo" pathophysiological mechanism of hyperhomocysteinemia. The observed association between angiographically documented clinical recurrences and TF and Hcy values awaits confirmation in studies designated to evaluate this issue on a larger number of patients.     

Effects of vitamin B12, folate,and entacapone on homocysteine levels in levodopa-treated Parkinson’s disease patients: A randomized controlled study

IntroductionPrevious studies have suggested a significant increase in plasma homocysteine (Hcy) levels in levodopa-treated Parkinson’s disease (PD) patients, and vitamin B12 and folate supplementation may decrease Hcy levels. However, the effects of catechol-O-methyltransferase inhibitors on levodopa-induced increase in Hcy levels were conflicting. The aim of this study was to evaluate whether Hcy levels are increased in levodopa-treated PD patients and to evaluate the effects of vitamin B12 and folate or entacapone on Hcy levels in levodopa-treated PD patients.MethodsWe analyzed and compared plasma Hcy levels in 20 levodopa-naïve PD patients and 42 levodopa-treated PD patients, followed by randomized assignment of 42 levodopa-treated patients to treatment groups with either vitamin B12 and folate, entacapone, or no medication.ResultsPlasma Hcy levels in levodopa-treated PD patients were higher than those in the control group, but the difference was not statistical significant (15.25 ± 6.70 and 13.13 ± 4.68, P = 0.216). Patients treated with vitamin B12 and folate had a significant decrease in plasma Hcy levels (P < 0.001). In the entacapone group, Hcy levels were mildly decreased, but the change did not reach statistical significance.ConclusionLevodopa-treated PD patients had higher plasma Hcy than levodopa-naive PD patients. Unlike entacapone, combination supplementation with vitamin B12 and folate was associated with significantly decreased plasma Hcy. We suggest that plasma Hcy levels should be monitored during levodopa treatment, and supplementation with inexpensive vitamin B12 and folate is beneficial for levodopa-treated patients.     

Hyperhomocysteinemia in levodopa‐treated patients with Parkinson's disease dementia

Dementia is a frequent non‐motor feature of Parkinson's disease (PD). Elevated plasma homocysteine (Hcy) levels have been associated with both cognitive impairment and dementia. Increased Hcy levels have been observed in levodopa‐treated patients with PD. The objective of our study was to evaluate the association between plasma Hcy levels and dementia in PD. We performed a multicenter cross‐sectional study on patients with PD with (PDD) and without (PDnD) dementia and age‐ and sex‐matched healthy controls. We compared Hcy levels in patients with PDD and PDnD and healthy controls, and we performed logistic regression analysis to search for an association between the presence of dementia and increased Hcy levels in PD. Patients with PD (121), PDD (42), and PDnD (79), and age‐ and sex‐matched controls (154) were enrolled. Hcy levels were higher in patients with PD compared to controls (17.5 μmol/L ± 10.2 vs. 11 ± 4.1; P < 0.00001). Among patients with PD, Hcy levels were higher in the PDD group compared to the PDnD group (20.7 μmol/L ± 12.1 vs. 15.8 ± 8.5; P = 0.002). In a multivariate logistic regression model, higher Hcy levels [Odds ratios comparing the top (>18.9 μmol/L) with the bottom tertile (<12.4 μmol/L): 3.68; 95% CI: 1.14–11.83] were significantly associated with dementia. These data support the association between elevated Hcylevels and the presence of dementia in PD. © 2009 Movement Disorder Society     

脑血管疾病患者血浆血脂类生化指标的相关性分析

目的分析脑出血和脑梗死患者血浆脂蛋白、总胆固醇、甘油三酯、同型半胱氨酸(Hcy)含量的变化,为脑血管疾病的诊断和干预提供依据。方法选取郑州大学第五附属医院2015-06—2016-06收治的94例脑血管疾病患者为观察组并选取同期健康体检的志愿者92例为对照组,观察组依据疾病类型分为观察组Ⅰ(脑出血患者,n=48)和观察组Ⅱ(脑梗死患者,n=46),采用全自动生化分析仪和配套试剂检测所有患者血浆脂蛋白、总胆固醇、甘油三酯、同型半胱氨酸含量,并进行对比分析。结果观察组脂蛋白、总胆固醇、甘油三酯、同型半胱氨酸含量高于对照组,差异有统计学意义(P0.05),观察组Ⅱ脂蛋白、同型半胱氨酸含量高于观察组Ⅰ,差异有统计学意义(P0.05)。结论脑血管疾病患者脂蛋白、总胆固醇、同型半胱氨酸含量增高,脂蛋白及同型半胱氨酸含量与脑梗死的发生密切相关。     

不同年龄阶段脑卒中患者同型半胱氨酸的初步研究

目的研究不同年龄阶段脑卒中患者血浆同型半胱氨酸(Hcy)水平,为预防及治疗脑卒中提供资料。方法观察不同年龄阶段健康者血浆Hcy水平,比较脑梗死以及脑出血患者与相应年龄阶段的健康者血浆Hcy的差异。结果健康对照组以及脑卒中患者Hcy水平均与年龄呈正相关,且脑梗死以及脑出血患者血浆Hcy水平均较相应年龄阶段的健康对照者血浆Hcy水平升高,有显著差异(P<0.05或P<001),脑梗死与脑出血患者血浆Hcy浓度比较差异无统计学意义(P>0.05)。结论血浆Hcy水平随年龄增长而增加,血浆Hcy水平是脑梗死与脑出血的独立危险因素。     

Mild hyperhomocysteinemia is associated with a decreased fibrinolytic activity in patients after ST-elevation myocardial infarction

BACKGROUND: Elevated homocysteine (Hcy) levels have been associated with increased risk for cardiovascular disease and it has been shown that hyperhomocysteinemia is associated with increased levels of t-PA antigen in individuals without evidence for coronary artery disease (CAD). The aim of this study was to examine if Hcy plasma levels are associated with plasma levels of fibrinolytic factors in patients with CAD and a history of acute myocardial infarction. METHODS: We measured in 56 patients with CAD, 1 month after their first ST-elevation myocardial infarction, plasma levels of Hcy, the fibrinolytic parameters tissue-type plasminogen activator (t-PA), plasminogen activator inhibitor-type-1 (PAI-1), and t-PA-PAI-1 complexes. RESULTS: Hcy plasma levels inversely correlated with t-PA activity (r=-0.303, p<0.05). Patients with mild hyperhomocysteinemia (Hcy>15 micromol/L, n=8) showed significantly lower plasma levels of t-PA activity (p<0.05). Regression analysis revealed that out of cardiovascular risk factors and medical treatment only Hcy was significantly associated with t-PA activity. CONCLUSIONS: Patients with CAD after a first myocardial infarction and hyperhomocysteinemia show a reduced t-PA activity independently from cardiovascular risk factors and medical treatment. Homocysteine lowering therapies may increase fibrinolytic activity and thereby may help to avoid atherothrombotic events in patients with CAD after a first myocardial infarction.     

精神分裂症血浆硫化氢、同型半胱氨酸、叶酸及维生素B6水平研究

目的:探讨精神分裂症患者血浆硫化氢(H2S)、同型半胱氨酸(Hcy)、叶酸(FA)和维生素B6(VitB6)水平的变化及其相关性.方法:检测66例精神分裂症患者和50名健康对照者的血浆H2S、Hcy、FA及VitB6水平.精神分裂症患者血浆H2S水平与Hcy、FA和VitB6水平的相关性用直线相关分析.结果:与正常对照...