血清叶酸、维生素B12水平与脑梗死的关系

目的为探讨血清叶酸、维生素B12水平与脑梗死的关系.方法运用放射免疫分析法检测50例脑梗死患者和44例正常对照组的血清叶酸、维生素B12浓度.结果脑梗死组血清叶酸、维生素B12浓度分别为(5.97±1.96)μg/ml、(511.47±212.06)μg/ml;对照组分别为(8.08±2.25)μg/ml、(806.91±254.60)μg/ml.脑梗死组血清叶酸、维生素B12水平均明显低于对照组,两组有显著性差异(P＜0.01).结论提示血清叶酸、维生素B12水平下降与脑梗死的发生有关,可能是其中又一危险因素.     

抑郁症患者血清叶酸和维生素B12浓度研究

目的：探讨抑郁症患者血清叶酸和维生素B12浓度改变。方法：收集门诊患者76例,均符合国际疾病分类第10版抑郁症诊断标准,病程至少半年;健康对照组67名。测定血清叶酸和维生素B12浓度。结果：两组之间叶酸平均浓度和叶酸缺乏的发生差异均无显著性（P〉0．05）。抑郁症组维生素B12平均浓度显著较低（P〈0．05）,维生素B12缺乏的发生率显著较高（P〈0．01）。结论：抑郁症与维生素B12缺乏有关,与叶酸无关。     

同型半胱氨酸、叶酸和维生素B12与精神分裂症的关系

目的 探讨精神分裂症患者血浆同型半胱氨酸、血清叶酸和维牛素B12水平的改变及其可能的意义.方法 采用病例对照研究,精神分裂症患者组122例,正常对照组122例.循环酶法测定两组血浆同型半胱氨酸水平;电化学发光仪测定叶酸和维生素B12水平.结果 ①精神分裂症患者组血浆间型半胱氨酸水平[(27.23±21.41)I.Lmob/L]明显高于正常对照组[(14.34±7.45)tunol/L],差异有统计学意义(P<0.001);②精神分裂症患者组维牛素B12水平[(328.93±157.52)pg/mL]明显低于正常对照组[(464.02±166.29)pg/mL],差异有统计学意义(P<0.05);③血浆同型半胱氩酸水平与叶酸水平(r=-0.44,P<0.001)和维生素Bi2水平(r=-0.36,P<0.001)均呈负相关;④Ligistic回归分析结果 显示,同型半胱氨酸与精神分裂症有关(P<0.001),其优势比(OR)为1.14(95%CI:1.08-1.21).结论 血浆同型半胱氨酸水平增高可能是精神分裂症的危险因素;叶酸和维生素B12缺乏与精神分裂症患者血浆同型半胱氨酸水平增高有关.     

老年性痴呆患者血清叶酸和维生素B12的临床观察

目的　了解老年性痴呆患者叶酸和维生素B12 水平 ,并探讨二者与痴呆的关系。方法　研究对象为 6 0岁以上的老年人 10 4例 ,患有老年性痴呆者 76例 ,其中老年性痴呆 (AD) 33例 ,血管性痴呆 (VD) 4 3例 ,健康老年者 2 8人作为对照组。对所有研究对象进行临床病史询问、内科和神经科查体 ,空腹取血检测血清叶酸和维生素B12 。结果　老年性痴呆患者叶酸的平均水平为 (7.6 5± 2 .4 8)ug/L(AD)和 (8.5 4± 3.34)ug/L(VD) ,维生素B12 的平均水平为 (312 .4 3± 182 .5 )ng/L(AD)和 (713.5 8± 6 2 5 .94 )ng/L(VD) ,对照组叶酸和VitB12 的平均水平分别为 (11.35± 3.76 )ug/L和 (5 0 7.8± 4 5 2 .85 )ng/L ,分别与对照组比较有显著性差异 (P <0 .0 5 )。结论　老年性痴呆者与血清低叶酸水平有关 ,而与低维生素B12 水平无关。     

轻度认知障碍患者血浆同型半胱氨酸和血清维生素B12及叶酸水平变化研究

目的 探讨轻度认知障碍(MCI)患者血浆同型半胱氨酸(Hcy)、血清维生素B12及叶酸水平的变化及相互关系.方法 MCI组80例,正常对照组80例,检测所有观察对象的血浆同型半胱氨酸、血清VitB12及叶酸水平并分析相互关系.结果 MCI组血浆Hey水平较正常组显著增高为(18.9±8.8)μmol/L vs(14.35±5.7)μmol/L,而血清叶酸和VitB12水平在正常组和MCI组之间并没有显著差异;相对于血浆Hey正常组,MCI比值比(0R)在轻、中度高同型半胱氨酸血症组中增高(OR=1.85,95%CI=1.56～2.95;OR=3.32,95%CI=1.61～6.48;P=0.001);无论在MCI组还是在正常组中,血浆Hey与血清叶酸及Vit B12的水平均呈负相关.结论 血浆Hey水平升高与MCI相关,叶酸和VitB122缺乏可能导致血浆Hcy水平升高.     

血管性痴呆患者血清叶酸、维生素B12水平的改变

研究[1.2]发现缺乏叶酸、维生素B12与脑功能障碍尤其与老年人认知功能障碍有关.本研究观察血管性痴呆(VD)患者的血清叶酸、维生素B12水平改变.现报告如下.     

慢性酒精中毒患者血清脂联素、叶酸、维生素B12含量测定及其临床意义

目的:探讨慢性酒精中毒患者血清脂联素( APN)、叶酸(FA)、维生素B12水平的变化及其与甘油三酯、胆固醇、HDL-C、LDL-C、空腹血糖、谷草转氨酶、谷丙转氨酶等指标的相关性,进一步探讨慢性酒精中毒与脑血管疾病及其高危因素的关系,为临床预防和治疗慢性酒精中毒患者、观察其预后均有重要的临床价值。方法:慢性酒精中毒患者54例,年龄37 ～68岁,平均48.42±6.39岁。饮酒年限为5～42年,纳入标准符合《中国精神障碍分类与诊断标准-CCMD3》;正常对照组43例,年龄24 ～ 59岁,平均32.60±7.00岁。采用ELISA法测定血清中脂联素水平;用化学发光法测定叶酸和B12水平,同时测定空腹血糖、甘油三酯、胆固醇、HDL-C、LDL-C、谷草转氨酶、谷丙转氨酶等相关指标的水平,研究它们与血清脂联素、叶酸、B12的关系。结果:(1)脂联素(mg/L)：对照组平均水平为2.05±1.10(mg/L);酒精组脂联素平均水平为1.5±0.57(mg/L)。Pearson相关分析表明：脂联素与空腹血糖呈负相关;与叶酸、B12、甘油三酯、胆固醇、HDL-C、LDL-C无明显相关性。(2)叶酸(ng/ml)：对照组为7.33±2.4;酒精组为3.63±1.97。Pearson相关分析表明：叶酸与B12、甘油三酯、HDL-C呈负相关;与脂联素、胆固醇、空腹血糖、LDL-C无明显相关性。(3) B12(pg/ml)：对照组403.4±116. 17;酒精组497.57±289.57。Pearson相关分析表明：与叶酸呈负相关;与HDL-C呈正相关;与脂联索、胆固醇、LDL-C、空腹血糖无明显相关性。结论:(1)长期饮酒可降低血清APN水平,且血清APN水平与血糖呈负相关。随着饮酒年限的增加,未发现血清APN随之降低的规律性。(2)长期饮酒可引起血清FA水平降低,并且随着饮酒年限的逐年增加,叶酸FA降低越明显。     

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。     

帕金森病患者周围神经病变与血清叶酸维生素B_(12)水平的相关性

目的分析帕金森病患者周围神经病变与血清叶酸、维生素B12水平的相关性。方法随机选取100例帕金森病患者为病例组,同时选取与病例组性别、年龄、身体条件、生活区域相似的100例健康人为对照组,比较2组周围神经病变的发病情况以及血清叶酸、维生素B12水平。结果病例组周围神经病变发病率42.0%,对照组为16.0%,病例组明显高于对照组(P0.05)。病例组尺神经、正中神经传导速度虽较对照组有所降低,但差异无统计学意义(P0.05);病例组周围神经受损者的腓肠神经、胫神经传导速度明显较对照组低(P0.05),但病例组无周围神经受损者的腓肠神经、胫神经传导速度较对照组虽有所降低,但只与对照组无周围神经受损者差异有统计学意义(P0.05)。对照组维生素B12以及叶酸的浓度较病例组高,且其浓度与病例组患者的周围神经受损程度有明显的正相关性;病例组无周围神经受损者的维生素B12以及叶酸浓度较对照组中周围神经受损者低(P0.05)。结论帕金森病患者周围神经病变与血清叶酸、维生素B12水平呈负相关,患者血清叶酸、维生素B12水平越低,发生周围神经病变的可能性越大,病情越重。     

叶酸和维生素B12对老年大鼠海马中tau蛋白磷酸化的影响

目的研究叶酸和维生素B12与tau蛋白磷酸化的关系，及叶酸和维生素B12在阿尔茨海默病（Alzheimer disease’s，AD）的发病机制中的可能作用。方法用免疫印迹和免疫组织化学的方法观察和比较2个月龄和40个月龄大鼠海马中tau蛋白的磷酸化情况，以及用叶酸和维生素B12处理后的40个月龄大鼠海马中tau蛋白的磷酸化水平。结果发现40个月龄老年大鼠脑中tau蛋白Ser396／404位点磷酸化水平比2个月龄大鼠高97％。同时发现用叶酸和维生素B12处理后，40个月龄大鼠海马中tau蛋白Ser396／404位点的过度磷酸化水平降低了27％。结论叶酸和维生素B12对神经骨架蛋白tau有一定的保护作用。     

Plasma homocysteine, folate and B12 in chronic schizophrenia

Elevated plasma levels of the amino acid homocysteine have been associated with schizophrenia, particularly in young male patients. Among other factors, low folate and vitamin B12 levels have been implicated in the increase in homocysteine. In order to investigate this association, we determined plasma homocysteine, folate and B12 levels in 97 (67 males and 30 females) inpatients with chronic schizophrenia and 103 (46 males and 57 females) controls. Patients and controls did not differ in folate or B12 levels, after adjusting for age. Patients with schizophrenia had higher plasma homocysteine than controls (mean=15.42 micromol/l in cases versus 11.54 micromol/l in controls: F(1,195)=17.978; p<0.001). This difference persisted after controlling for folate and B12 concentrations. Both male and female patients had increased plasma homocysteine compared to controls [(males: mean=16.61 micromol/l in cases versus mean=13.72 in controls: F(1,110)=5.54; p=0.020) (females: mean=12.78 micromol/l in cases versus mean=9.79 micromol/l in controls: F(1,84)=13.54; p<0.001)]. When dividing our sample into two age groups (age < and > or =50 years), both young and older females and younger males with schizophrenia had increased plasma homocysteine compared to controls. We therefore suggest that homocysteinemia is a general risk factor for schizophrenia. We further suggest that it is not limited to young male patients and is not necessarily associated with low folate or B12 levels.     

叶酸和维生素B_(12)对高Hcy急性脑梗死患者血Hcy水平及神经功能的影响

目的观察叶酸和维生素B12对高同型半胱氨酸(Hcy)急性脑梗死(ACI)患者血Hcy水平及神经功能的影响。方法选取100例高Hcy水平ACI患者为研究对象,随机分为观察组和对照组各50例。对照组患者给予常规治疗,观察组患者在常规治疗的基础上加用口服叶酸和维生素B12治疗。观察和比较2组患者治疗前后的血浆Hcy水平、血清一氧化氮(NO)水平、血清内皮素(ET)水平、日常生活能力量表(ADL)评分、美国国立卫生研究院卒中量表(NIHSS)评分。结果观察组患者治疗后血浆Hcy水平、血清NO水平、血清ET水平均较治疗前显著改善(t=25.146、-11.405、15.493,P0.05),且均优于对照组(t=-26.364、10.550、-15.181,P0.05);2组患者治疗后NIHSS评分、ADL评分均较治疗前显著改善(t=22.802、16.870、-22.181、-11.871,P0.05),且观察组患者治疗后的NIHSS评分、ADL评分均显著优于对照组(t=-7.798、10.516,P0.05)。结论应用叶酸和维生素B12治疗ACI,能够降低血浆Hcy水平,改善血管内皮功能,促进神经功能的恢复,增强日常生活能力,有助于改善患者的生存质量和预后。     

丙戊酸钠对癫痫患者血同型半胱氨酸、叶酸、维生素B_(12)水平的影响

目的探讨丙戊酸钠(VPA)对血同型半胱氨酸(Hcy)、叶酸(Fol)、维生素B12(VitB12)浓度的影响。方法分别检测VPA单药治疗癫痫患者的血Hcy、Fol、VitB12浓度,并与未服用抗癫痫药的癫痫患者组及健康对照组比较。结果 VPA组患者血Hcy浓度明显高于癫痫对照组和正常对照组(P<0.01),Fol浓度低于癫痫对照组和正常对照组(P<0.05),VitB12浓度在VPA组有升高趋势。结论 VPA可引起癫痫患者血Hcy水平升高和Fol水平降低,长期服用VPA的癫痫患者应监测血Hcy、Fol、VitB12浓度,及时补充B族维生素、Fol有利于减少血栓事件的发生。     

Homocysteine,vitamin B12 and folate levels in Iranian patients with Multiple Sclerosis: A case control study

Background

Recently, homocysteine (Hcy), folate, and vitamin B12 have been proposed to have several roles on MS pathogenesis.

Objective

We performed this study to determine the role of serum levels of Hcy, vitamin B12, and folate in patients with relapsing remitting MS (RRMS) and compared them with healthy controls.

Methods

We recruited 75 RRMS patients and 75 subjects as controls with the same age and sex. Homocysteine was measured using fluorimetric high-performance liquid chromatography. Plasma folate and vitamin B12 levels were measured through ion-capture method.

Results

Mean plasma levels of vitamin B12, folate, and Hcy in cases were 342.64 ± 210.66 pg/ml, 9.74 ± 4.77 ng/ml, and 22.73 ± 11.63 μM/L, respectively, which showed significant difference in comparison with the controls. In addition, there were significant correlations between mean serum Hcy levels and duration of disease (r = 0.2, p = 0.05) and treatment with interferon (r = 0.21, p = 0.01). In cases, Hcy level was higher among those on β interferon (24.56 ± 11.87 vs. 19.71 ± 10.75, p = 0.01).

Conclusions

We concluded that serum levels of vitamin B12 and folate decreased in RRMS patients, but Hcy levels increased significantly. It seems necessary to conduct prospective trials to determine whether the treatment with supplements and correct biomarker levels in the early stage of the disease can change the course of the disease. We recommend regular checking of the serum level of Hcy in patients who use disease-modifying drugs.     

Plasma homocysteine, vitamin B12 and folate in Alzheimer's patients and healthy Arabs in Israel

High plasma homocysteine (tHcy) is a risk factor for cardiovascular disease and stroke and Alzheimer's disease (AD). An inverse relationship has been reported between tHcy and plasma B12 and folate levels. Seventy-nine AD patients and 156 controls from three Arab villages in northern Israel participated. Plasma tHcy, B12 and folate levels were determined. Data were analyzed using univariate statistical tests and logistical regression with confounders. tHcy was significantly higher in AD patients (20.6+/-8.7 micromol/l) than in controls (16.4+/-6.5 micromol/l) (p=0.03) after correction for year of birth, gender and smoking status. Plasma B12 (322.9+/-136.0/350.5+/-175.3 pmol/l) and plasma folate (4.5+/-3.8/4.9+/-2.6 nmol/l) levels did not differ significantly between AD patients and controls. Subjects in the highest tHcy tertile or in the lowest B12 and folate tertiles did not have greater risk to develop AD. In this population residing in Arab villages in northern Israel, tHcy levels were significantly higher among AD patients than in controls. Plasma B12 and folate levels were lower among cases but were not significant. There was not a significant association between plasma tHcy, B12 and folate levels in controls or AD patients. High levels of tHcy may suggest the need for folate and vitamin B12 supplementation in this population.     

H型高血压患者血清B族维生素水平以及脑影像学变化的研究

目的 观察H型高血压患者血浆同型半胱氨酸(Hcy)及血清叶酸、维生素B12和患者脑白质的变化,为临床干预脑白质病变提供参考依据. 方法 选择大连市友谊医院神经内科、心内科自2010年4月至2011年3月收治的高血压患者110例(其中H型高血压组78例,单纯高血压组32例),选择同期健康体检者50例作为对照组,采用放射免疫分析法检测血浆Hcy及血清叶酸、维生素B12的水平,MRI检查并评价脑白质病变的级别. 结果 H型高血压患者m浆Hcy、血清叶酸、维生素B12水平高于单纯高血压组和对照组,差异有统计学意义(P＜0.05);3组受试者脑白质病变级别的差异有统计学意义(P＜0.05),由平均秩次判断,脑白质病变在H型高血压组表现明显,其次为单纯高m压组、对照组. 结论 H型高血压患者血中叶酸、维生素B12水平下降,脑白质病变损害严重,可能与高Hcy血症有关.