抑郁发作自杀未遂患者脑源性神经营养因子水平及其相关因素研究

目的 探讨脑源性神经营养因子(BDNF)在抑郁发作自杀未遂者中的可能作用.方法 对抑郁发作自杀未遂患者(自杀未遂组,23例)和抑郁发作无自杀行为患者(无自杀组,24例)采用汉密尔顿抑郁量表(24项,HAMD24)、Beck绝望量表(BHS)和自杀意念自评量表(SIOSS)评定抑郁严重程度、绝望程度及自杀意图的强烈程度;采用酶联免疫吸附法测定其血清BDNF浓度,并与正常对照者(对照组,30名)比较;对自杀未遂组的血清BDNF浓度与各相关因素进行Pearson相关分析.结果 (1)自杀未遂组的HAMD24[(37.8±8.7)分]、BHS[(13.0±3.8)分]及SIOSS评分[(18.1±3.9)分]均高于无自杀组[分别为(26.0±6.0)分、(7.5±4.3)分、(12.0±4.0)分;P<0.01].(2)自杀未遂组的BDNF平均浓度[(57 ±16)ng/L]低于无自杀组[(75 ±28)ng/L;P<0.05],无自杀组的BDNF平均浓度亦低于正常对照组[(111±39)ng/L;P<0.01].(3)自杀未遂组的血清BDNF浓度与抑郁发作的病程(r=-0.541)、BHS总分(r=-0.494)、SIOSS总分(r=-0.754)呈负相关(P<0.01-0.05).结论 低水平的BDNF可能是抑郁发作自杀未遂的一个危险因素.     

无抽搐电休克对精神分裂症患者血清脑源性神经营养因子的影响

目的探讨改良电抽搐治疗(MECT)对精神分裂症(SZ)患者血清脑源性神经营养因子(BDNF)的影响。方法采用酶联免疫吸附法对80例SZ患者(患者组)在MECT前后和77例正常人(正常组)进行血清BDNF水平检测,研究MECT对精神分裂症患者BDNF水平的影响。结果 MECT前,患者组血清BDNF水平[(9.7±2.1)ng/ml]显著低于正常组[(12.4±3.2)ng/ml](t=6.2,P0.01)。MECT后,患者组血清BDNF水平[(11.9±3.3)ng/ml]显著升高,与MECT前比较有显著差异(t=-4.8,P0.01),与正常组无显著差异(t=0.9,P0.05)。结论 SZ患者可能存在血清BDNF水平低下,MECT可以提高患者血清BDNF水平。     

抑郁症患者血清脑源性神经生长因子水平与抗抑郁剂治疗早期疗效的关系

目的:探讨抑郁症患者治疗前后血清脑源性神经生长因子(BDNF)水平变化及与早期改善的关系。方法:给予62例抑郁症患者(患者组)艾司西酞普兰抗抑郁治疗2周;以治疗后汉密尔顿抑郁量表(HAMD)-17减分率≥20%为界将患者分为早期改善组及非早期改善组;比较两组患者治疗前后血清BDNF水平变化及其与正常对照组(60人)的差异。结果:治疗前患者组血清BDNF水平[(1113.10±321.36)pg/ml]明显低于正常对照组[(1379.14±385.04)pg/ml](t=4.1487,P0.01);治疗2周末[(1232.86±338.4)pg/ml]较治疗前显著提高(t=2.0207,P=0.0455),但是仍然低于正常对照组(t=2.2308,P=0.0275)。早期改善组(19例)血清BDNF水平治疗前[(1205.22±308.35)pg/ml]及治疗2周末BDNF增加值[(155.76±81.02)pg/ml]明显高于非早期改善组(43例)[(1041.26±292.18)pg/ml,(113.84±62.08)pg/ml;t=2.0032,t=2.2275;P均0.05];早期改善组治疗前、后血清BDNF水平与正常对照差异无统计学意义(F=1.83,P=0.1657)。结论:抑郁症患者血清BDNF水平显著降低,但降低幅度较小及治疗后提升幅度较大的患者可获得早期改善。     

Guillain-Barre综合征患儿血清白介素-18、白介素-13水平的变化

目的探讨白介素(IL)-18、IL-13在Guillain-Barre综合征(GBS)患儿血清中的含量变化及意义。方法采用酶联免疫吸附法(ELISA)测定GBS患儿急性期与恢复期血清IL-18、IL-13水平,并与正常对照组比较。结果GBS患儿急性期血清IL-18[(44.87±7.53)pg/ml]与IL-13[(37.46±6.94)pg/ml]水平均明显高于恢复期[和(38.25±5.86)pg/ml、(32.14±6.89)pg/ml]和正常对照组[(32.35±4.93)pg/ml、(24.76±5.59)pg/ml](均P<0.01);且病情重者[(47.02±8.39)pg/ml、(39.46±6.72)]pg/ml]明显高于病情轻者[(41.96±5.58)pg/ml、(34.51±6.25)pg/ml](均P<0.05);GBS患者恢复期血清IL-18、IL-13水平仍高于正常对照组(均P<0.01);相关分析发现GBS病情与血清IL-18、IL-13水平呈正相关(r=0.116,0.078,均P<0.05)。结论GBS患儿血清IL-18、IL-13含量增加,其可能参与了GBS的发病机制。     

烟草使用行为对首发精神分裂症患者脑源性神经营养因子水平的影响

目的:探讨烟草使用行为对首发精神分裂症患者脑源性神经营养因子(BDNF)水平的影响。方法:首发精神分裂症患者63例和健康对照者60名;根据自制吸烟问卷及尼古丁依赖量表将患者分为烟草使用组31例和非烟草使用组32例,采用酶联免疫吸附测定入组者血清BDNF浓度。结果:首发精神分裂症患者血清BDNF水平[(10.51±0.29)ng/mL],低于健康对照组[(13.79±0.76)ng/mL],差异有统计学意义(P0.05);烟草使用组血清BDNF水平[(10.76±0.22)ng/m]高于非烟草使用组[(10.28±0.11)ng/mL](P0.005)。结论:首发精神分裂症患者血清BDNF水平低于正常人群,而烟草使用行为对于首发精神分裂症患者的血清BDNF水平具有一定程度的升高作用。     

伴自杀未遂双相障碍患者的血清脑源性神经营养因子水平

目的 分析伴自杀未遂的双相障碍（BD）患者与不伴自杀未遂患者及健康人群间血清BDNF水平的差异,探讨BDNF在预防BD患者自杀中的作用.方法 采用DSM-IV轴Ⅰ障碍用临床定式检查（患者版）（SCID-I/P）对临床诊断为心境障碍的患者进行评佑.纳入111例BD患者（26例有自杀未遂史）及41例健康对照.使用汉密尔顿抑郁量表（HAMD-17）及杨氏躁狂量表（YMRS）评估患者症状严重程度;使用酶联免疫吸附测定法测定所有研究对象的血清BDNF水平.结果 伴自杀未遂的BD患者血清BDNF水平（13.8±7.4） ng/ml显著低于无自杀未遂患者（18.7±11.9） ng/ml及健康对照组（26.0±12.9）ng/ml（F=9.371,P＜0.01）;伴自杀未遂的BD患者抑郁发作次数显著多于不伴自杀未遂患者,在控制抑郁发作次数后,两组间血清BDNF水平差异消失（P=0.236）;伴自杀未遂的BD患者血清BDNF水平和抑郁发作次数有相关性的倾向（r=-0.388,P=0.068）,与HAMD-17得分呈负相关（r=-0.585,P＜0.01）.结论 本研究提示BDNF在BD及BD患者自杀未遂的病理生理机制中起重要作用;伴自杀未遂的BD患者血清BDNF水平可能与抑郁发作次数、抑郁严重程度相关;通过有效治疗来提高BDNF水平可能通过减少抑郁发作次数,降低抑郁严重程度来降低自杀风险.     

重症肌无力患者血清可溶性Fas水平变化及其临床意义

目的探讨重症肌无力(MG)患者血清可溶性Fas(sFas)水平变化及其临床意义。方法采用流式细胞术及酶联免疫吸附法(ELISA)分别测定45例MG患者(MG组)及40例对照者(对照组)外周血T细胞亚群分布和血清sFas水平,并对其中24例MG患者应用糖皮质激素(GC)治疗前后的血清sFas水平进行比较。结果(1)MG组外周血中CD8 T细胞百分率为(21.50±2.21)%,明显低于对照组[(27.75±3.00)%](P<0.01);CD4 /CD8 比值(1.92±0.26)明显高于对照组(1.48±0.16)(P<0.01);血清sFas水平[(3542.06±706.23)pg/m l]显著高于对照组[(2568.18±562.48)pg/m l](P<0.01)。(2)MG组全身型血清sFas水平为(3914.23±804.81)pg/m l,极明显高于眼肌型[(2797.72±592.83)pg/m l](P<0.001);病情中、重度患者明显高于病情轻度者(均P<0.005);预后良好者[(3254.69±661.73)pg/m l]显著低于预后不良者[(4178.38±841.65)pg/m l](P<0.001)。(3)24例MG患者经GC治疗后sFas水平[(2864.59±617.43)pg/m l]较治疗前[(3539.67±705.92)pg/m l]极显著降低(P<0.001)。结论MG患者血清凋亡抑制因素sFas水平增高,并与MG类型、病情及预后相关;GC治疗可以改善MG患者的免疫功能。     

抑郁症自杀未遂患者血清脑源性神经营养因子水平的变化

目的探讨血清脑源性神经营养因子（BDNF）水平与抑郁症患者自杀行为的关系。方法采用酶联免疫分析实验测定抑郁症自杀未遂患者（36例）、无自杀行为患者（55例）及36名正常对照血清BDNF水平,对抑郁症患者以汉密尔顿抑郁量表（HAMD）评定抑郁症状,以自杀意念自评量表（SIOSS）评定自杀意念的强烈程度。结果抑郁症患者组血清BDNF水平低于正常对照组（P〈0．01）。自杀未遂组血清BDNF水平低于无自杀组及正常对照组（P〈0．01）。自杀未遂组HAMD总分和SIOSS总分高于无自杀组。抑郁症患者血清BDNF水平与SIOSS总分呈负相关。结论抑郁症患者存在血清BDNF降低,BDNF水平可能是自杀倾向行为的生物学标志。     

P-选择素、血管内皮生长因子在皮质下动脉硬化性脑病中的表达及意义

目的探讨皮质下动脉硬化性脑病(SAE)患者血P-选择素、血管内皮生长因子(VEGF)水平及其与血糖、血脂和C反应蛋白(CRP)的相关性。方法测定54例SAE患者(SAE组)、57名健康老年人(健康对照组)血浆P-选择素、血清VEGF、血糖、血脂、CRP水平,并进行比较和相关分析。结果SAE组P-选择素[(17.61±5.63)ng/ml]、VEGF[(126.33±47.51)pg/ml]水平明显高于健康对照组[(14.72±3.89)ng/ml,(102.59±40.16)pg/ml](均P<0.01);P-选择素水平随痴呆程度加重而升高,痴呆中、重度组VEGF水平[(152.46±53.75)pg/ml、(150.52±55.94)pg/ml]明显高于轻度组[(126.79±44.83)pg/ml](P<0.01,P<0.05);中、重度组间差异无统计学意义。SAE组P-选择素与血糖、三酰甘油(TG)、CRP呈正相关(r=0.282、0.293、0.287,均P<0.05);VEGF与总胆固醇(TC)、CRP呈正相关(r=0.291、0.336,均P<0.05);P-选择素与VEGF呈正相关(r=0.295,P<0.05)。结论P-选择素、VEGF参与了SAE的血栓形成和组织修复过程;检测P-选择素、VEGF水平,指导抗血小板药物的应用,对预防SAE可能有重要意义。     

精神分裂症患者改良电休克治疗前后血清胶质源性神经营养因子水平的变化

目的:探讨改良电休克治疗(MECT)对精神分裂症(SZ)患者血清胶质源性神经营养因子(GDNF)水平的影响。方法:采用酶联免疫吸附法,对48名正常人(对照组)和70例SZ患者(患者组)在MECT前后进行血清GDNF水平检测。结果:MECT前,患者组血清GDNF水平[(34.98±20.36)ng/ml]显著低于对照组[(78.23±40.57)ng/ml](t=6.821,P0.001)。MECT后,患者组血清GDNF水平[(79.88±36.10)ng/ml]显著升高,与MECT前比较有显著差异(t=-10.64,P0.01),与对照组差异无统计学意义(t=-0.232,P0.05)。结论:SZ患者可能存在血清GDNF水平低下,MECT可能通过提高GDNF水平起作用。     

抑郁症患者自杀行为与血清脑源性神经营养因子水平的关系

目的:探讨血清脑源性神经营养因子(BDNF)水平与抑郁症患者自杀行为之间的关系.方法:采用酶联吸附反应方法对有自杀行为的21例抑郁症患者(自杀组)、无自杀行为的52例抑郁症患者(非自杀组)以及80例正常人(对照组)血清的BDNF进行检测,应用汉密尔顿抑郁量表(HAMD)对抑郁症患者的抑郁症状进行评定. 结果:抑郁症患者...     

Associations between serum brain-derived neurotrophic factor levels and clinical phenotypes in schizophrenia patients

This study investigated serum brain-derived neurotrophic factor (BDNF) protein levels in schizophrenia patients and healthy control subjects and schizophrenia patients with various clinical phenotypes. During a 1-year period, 126 schizophrenic patients and 96 healthy control subjects were recruited. Serum BDNF protein levels were measured using an ELISA Kit. Psychiatric diagnoses were made according to DSM-IV criteria. One-way analysis of variance (ANOVA) showed no significant differences in serum BDNF protein levels between schizophrenia and healthy normals. Additionally, no significant differences existed in BDNF levels between schizophrenia patients for the following variables: with/without a suicide attempt; antipsychotic drug use, family tendency and disease onset before and after 25 years old. However, patients with catatonic schizophrenia had lower serum BDNF protein levels than patients with paranoid or residual schizophrenia. These analytical results suggested that BDNF might play an important role in the clinical subtypes of schizophrenia, but it needed further investigation in future.     

血清胆固醇水平与精神分裂症自杀未遂

几项研究显示。低胆固醇水平与自杀有关，为在精神分裂患者中明确低血清胆固醇水平与自未遂史之间的关系，我们对１２４例患精神分裂症的自杀未遂者的血清胆固醇水平进行了调查和测定。     

精神分裂症患者脑源性营养因子与临床特征的关系

目的：探讨精神分裂症患者脑源性营养因子（BDNF）与临床特征的相关性。方法：符合美国精神障碍诊断与统计手册第4版（DSM-IV）诊断标准的精神分裂症患者173例,并选择年龄、性别相匹配的健康居民作为对照,以阳性和阴性症状量表（PANSS）评估精神症状,用酶联免疫吸附法检测血清BDNF水平。结果：患者组血清BDNF水平（9．8±1．9）μg／L显著低于正常对照组（11．8±2．5）μg／L,（t=-7．6．v=322,P〈0．01）;女性患者血清BDNF水平（10．4±2．1）μg／L显著高于男性组（9．6±1．8）μg／L,（t=2．3,v=154,P〈0．05）;氯氮平治疗的患者BDNF（10．1±1．6）μg／L显著高于利醅酮治疗者（8．9±2．6）μg／L,（F=3．1,v=2．P〈0．05）;患者BDNF水平与年龄、总病程、PANSS量表中阴性症状分呈显著负相关（r=-0．2,-0．16,-0．14,P〈0．05）,结论：精神分裂症患者血清BDNF水平显著下降;BDNF存在着性别差异,年龄越大、病程越长、阴性症状越重BDNF越低,接受氯氮平治疗患者BDNF高于利酪酮组.     

Decreased levels of brain-derived neurotrophic factor in serum of chronic schizophrenic patients

Neurotrophic factors regulate neuronal development as well as synaptic plasticity, and their impairment is often implicated as a cause of schizophrenia. Among various neurotrophic molecules, brain-derived neurotrophic factor (BDNF) levels have been found to be increased in the corticolimbic regions of patients’ brains. In the present study, we assessed peripheral BDNF levels in whole blood as well as in the serum of two independent groups of schizophrenic patients (n=34 in each group) and healthy volunteers (n=35 and n=27, respectively). BDNF protein levels in fresh serum and blood of the patients and volunteers were measured using a two-site enzyme immunoassay and correlated with the number and decay of platelets. In addition to the studies of patients and volunteers, neuroleptic effects on BDNF levels were assessed by administering haloperidol to adult rats for 2 weeks or 5 months. The major findings were as follows: BDNF levels were significantly reduced in the serum of schizophrenic patients (P<0.005, Mann–Whitney U-test) but not in their whole blood. Antipsychotic dose did not correlate with serum BDNF levels. Moreover, chronic administration of haloperidol failed to decrease serum BDNF levels in adult rats. Abnormal levels of BDNF are evident not only in the brain of schizophrenic patients, but also in their peripheral blood. The BDNF reduction in serum but not in whole blood suggests a potential deficit in neurotrophic factor release in patients with schizophrenia.     

Reduced serum BDNF levels in schizophrenic patients on clozapine or typical antipsychotics

Neurotrophic factors regulate neuronal development and synaptic plasticity, possibly playing a role in the pathophysiology of schizophrenia and other psychiatric disorders. Decreased brain-derived neurotrophic factor (BDNF) levels have been found in brains and in the serum of schizophrenic patients, but results are inconsistent. Also, clozapine may upregulate brain BDNF expression. In the present study, we assessed serum BDNF immunoreactivity in 44 schizophrenic patients (20 on clozapine and 24 on typical antipsychotics) and in 25 healthy volunteers. Serum BDNF levels were measured using an enzyme immunoassay. Healthy controls showed significantly higher levels of BDNF compared to the whole group of schizophrenic patients (p<0.001) as well as to the subgroups on typical antipsychotics and clozapine (p<0.001). Serum BDNF values for controls were 168.8+/-26.3pg/ml, for the clozapine group were 125.4+/-44.5pg/ml and for the group on typicals were 101.3+/-51.6pg/ml. BDNF values from patients on clozapine were non-significantly higher than values from patients on typical antipsychotics (p=0.09). Serum BDNF was strongly and positively correlated with clozapine dose (r=0.643; p=0.002) but not with other demographic characteristics. These results reinforce previous findings of reduced serum BDNF levels in schizophrenic patients and suggest a differential effect of clozapine compared to typical antipsychotics on such levels.     

Serum BDNF levels and weight gain in schizophrenic patients on long-term treatment with antipsychotics

Several lines of evidence suggest that central brain-derived neurotrophic factor (BDNF) modulates food intake, metabolism, and increases in body weight. Reports have also shown that serum BDNF is altered in schizophrenic patients treated with antipsychotics. This study aimed to determine if there was a relationship between BDNF and antipsychotic-induced weight gain in patients with chronic schizophrenia. Serum BDNF was measured in 124 schizophrenia patients chronically treated with clozapine (n = 57), risperidone (n = 23) or typical antipsychotics (n = 44) and 50 healthy control subjects. To further assess group differences in serum BDNF, additional analyses were performed in a subset of patients and controls individually matched for body mass index (BMI). BDNF levels were lower in patients with schizophrenia than normal controls. However, this difference was not present when controlling for current BMI. In the individually BMI-matched sample, no differences in serum BDNF levels were observed in schizophrenic patients compared to BMI-matched healthy controls. BDNF levels negatively correlated with BMI gain in female but not in male patients when gender was considered. Antipsychotic class exerted differential effects over BDNF levels and BMI gain. Our findings suggest that decreased BDNF levels may be associated with weight gain in female schizophrenic patients on long-term antipsychotic treatment.