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.     

脑源性神经营养因子血清浓度与双相障碍关系横断面研究

背景近年来发现,脑源性神经营养因子（brain-derived neurotrophic factor,BDNF）的血清浓度与双相障碍症状关系的研究结果不一致。目的检验BDNF血清浓度与双相障碍的关系,并讨论双相障碍家族史在两者关系中的作用。方法检测了228例双相障碍患者和153名健康对照者的BDNF血清浓度,采用杨氏躁狂量表和汉密尔顿抑郁量表（17项）评估患者的躁狂或抑郁症状,将杨氏躁狂量表评分≥20分定义为躁狂发作,共计85例;将汉密尔顿抑郁量表评分≥17分定义为抑郁发作,共计14例;将杨氏躁狂量表评分〈20分并且汉密尔顿抑郁量表评分〈17分定义为缓解期,共计129例。结果患者组平均（标准差）BDNF血清浓度低于健康对照组[18．75（8．98）ng／d比23．72（5．60）．g／ml,t=6．09,P〈0．001】,且各个亚组（躁狂组、抑郁组和缓解期组）与健康对照组BDNF血清浓度的差异均有统计学意义。躁狂发作期与缓解期之间的BDNF血清浓度差异有统计学意义,其余各亚组间的差异无统计学意义。在多元线性回归模型中控制各个因素后,发现仅有杨氏躁狂量表评分与BDNF血清浓度呈正相关（标准回归系数=0．17,P=0．011）。结论双相障碍患者的BDNF血清浓度低于健康对照组,BDNF血清浓度与躁狂症状存在正相关,与是否存在家族史并不相关。     

双相Ⅰ型与双相Ⅱ型患者血清脑源性神经营养因子水平的研究

目的 探讨血清脑源性神经营养因子(BDNF)水平在双相I型(BD Ⅰ型)、双相Ⅱ型(BD Ⅱ型)患者与正常对照者间的差异.方法 对广州市3家三级甲等医院精神科临床诊断为情感性精神障碍的患者使用SCID-I/P再诊断,符合BD Ⅰ型和BD Ⅱ型诊断标准的患者为研究组,并进行YMRS及MADRS评定.对照组为经SCID-I/P排除符合DSM-Ⅳ轴Ⅰ障碍的人员.用ELISA方法测定所有研究对象的血清BDNF水平.结果 患者血清BDNF水平显著低于正常对照[(17.60±11.24)ng/ml vs(26.04±12.85)ng/ml,t=-3.953,P＜0.001)];未发现BD Ⅰ型与BD Ⅱ型患者间血清BDNF水平存在统计学差异;未发现患者血清BDNF水平与YMRS、MADRS评分问存在相关关系;合用与未合用情感稳定剂患者间血清BDNF差异无统计学意义.结论 BDNF可能作为BD的生物学标记,在BD Ⅰ型与BD Ⅱ型障碍的病理生理学上起重要作用.     

双相障碍与脑源性神经营养因子外周血mRNA和蛋白表达相关性的研究

目的 探讨脑源性神经营养因子(BDNF)外周血mRNA表达和血清蛋白水平与双相障碍、双相躁狂和双相抑郁的关系.方法 应用TaqMan探针及荧光实时定量逆转录-聚合酶链反应方法,检测并比较双相障碍组(61例)、双相躁狂组(29例)、双相抑郁组(32例)和对照组(61名)外周血白细胞BDNF基因的mRNA表达水平的差异;采用酶联免疫吸附方法测定血清BDNF浓度;应用17项汉密尔顿抑郁量表(HAMD17)和Young氏躁狂量表(YMRS)评定患者抑郁症状严重程度和躁狂症状的严重程度,采用Pearson相关分析分析BDNF基因mRNA表达水平和血清蛋白浓度与HAMD17和YMRS评分的关系.结果 (1)双相障碍组BDNF基因mRNA相对表达水平(0.0077±0.0019)较对照组(0.0096±0.0028)下降(t=-3.74,P＜0.01);双相躁狂组(0.0081±0.0023)、双相抑郁组(0.0073±0.0024)与对照组3组间BDNF基因mRNA相对表达水平的差异有统计学意义(F=7.55,P＜0.01),且双相躁狂组和双相抑郁组均低于对照组(P＜0.05或P＜0.01).(2)双相障碍组BDNF血清蛋白浓度低于对照组(t=-2.90,P＜0.01);双相躁狂组、双相抑郁组与对照组3组间BDNF血清蛋白浓度的差异有统计学意义(F=4.21,P＜0.05);双相躁狂组和双相抑郁组BDNF血清蛋白浓度均低于对照组(P均＜0.05),但双相躁狂组与双相抑郁组比较差异无统计学意义(P＞0.05).(3)双相躁狂组BDNF基因mRNA表达水平及血清蛋白浓度与YMRS评分未见相关(P＞0.05),双相抑郁组BDNF基因mRNA表达水平及血清蛋白浓度与HAMD17评分未见相关(P＞0.05).结论 双相障碍与BDNF水平下调可能相关,这种下降贯穿于躁狂相和抑郁相,而且BDNF的变化不会因双相障碍患者极性的变化而处于两极状态.     

抑郁症患者治疗前后血清白介素-6及脑源性神经营养因子水平的变化及其相应的临床意义

目的探索抑郁症患者治疗前后白介素-6及脑源性神经营养因子水平的变化情况。方法收集来我科就诊的临床诊断为抑郁症且愿意接受本研究的患者56例(作为观察组),另外收集在我院进行健康体检的研究对象60例(作为对照组),并测量患者治疗前后的血清白介素-6及脑源性神经营养因子的水平,并用汉密尔顿抑郁量表测量观察组患者抑郁得分,分析抑郁得分与脑源性神经营养因子水平之间的相关性。结果对照组患者治疗前后的IL-6及脑源性神经营养因子水平之间的差异均无统计学意义(P0.05),而观察组患者治疗后的IL-6水平低于治疗前,且差异有统计学意义(P0.05),脑源性神经营养因子水平高于治疗前,且差异有统计学意义(P0.05),HAMD减分率与IL-6水平之间呈负相关,r=-0.745,而与BDNF水平之间呈正相关,r=0.813,且两者之间均具有统计学意义(P0.05)。结论治疗后患者的IL-6水平降低而脑源性神经营养因子水平升高,且脑源性神经营养因子水平越高,抑郁得分越低。     

阿尔茨海默病患者血清脑源性神经营养因子水平研究

目的 探讨阿尔茨海默病（AD）与血清脑源性神经营养因子（BDNF）水平的关系。方法 采用酶联免疫吸附法对46例AD患者（研究组）和44例正常对照者（对照组）的外周血清进行BDNF水平检测。所有受试者均进行简易精神状态量表（MMSE）、Hachinski缺血指数（HIS）及汉密尔顿抑郁量表（HAMD）评定,AD患者用临床痴呆评定量表（CDR）进行痴呆严重程度分级。结果 研究组血清BDNF水平低于对照组（P〈0.01）。研究组轻度、中度与重度AD患者血清BDNF水平均低于对照组（P〈0.01）,重度AD血清BDNF水平低于轻度AD（P〈0.05）。研究组血清BDNF水平与年龄、病程呈负相关（P〈0.01）,与MMSE评分呈正相关（P〈0.01）。结论 AD患者存在血清BDNF水平降低,且与其年龄、病程及痴呆程度显著相关。     

广泛性焦虑障碍治疗前后血清脑源性神经营养因子水平的变化

目的研究广泛性焦虑障碍(generalized anxiety disorder,GAD)患者血清脑源性神经营养因子(brain derived neurotrophic factor,BDNF)水平的特点及其治疗变化。方法收集GAD患者及正常对照者各40名,采用帕罗西汀片有效治疗量治疗12周,治疗前后采用汉密尔顿焦虑量表(Hamilton Anxiety Scale,HAMA)进行疗效评估,采用ELISA法测定血清BDNF的浓度并与对照组比较。结果治疗前GAD患者的血清BDNF水平[(26.03±10.52)ng/mL]低于对照组[(43.27±10.28)ng/mL],治疗后GAD患者血清BDNF水平[(35.85±11.96)ng/mL]较治疗前升高,但仍低于正常对照组,其差异均有统计学意义(P均<0.05);治疗后GAD显效患者[(39.43±12.35)ng/mL]与对照组血清BDNF水平的差异无统计学意义(P>0.05);基线时,GAD患者血清BDNF水平与HAMA量表总分、精神性焦虑因子分呈负相关(P<0.05),与躯体性焦虑因子分的相关没有统计学意义(P>0.05);治疗后,GAD患者血清BDNF水平的变化与HAMA总分、躯体性焦虑因子分、精神性焦虑因子分变化均呈负相关(P均<0.05)。结论血清BDNF水平可能是GAD的状态性指标之一。     

男性慢性精神分裂症患者血清脑源性神经营养因子和胶质源性神经营养因子水平及认知功能的对照研究

目的:探讨慢性精神分裂症患者血清脑源性神经营养因子(BDNF)、胶质源性神经营养因子水平(GDNF)和神经认知功能的变化及它们之间关系。方法:入组慢性精神分裂症患者57例和正常对照39名。采用阳性与阴性症状量表(PANSS)评估患者的精神症状。使用酶联免疫吸附法检测血清BDNF、GDNF蛋白水平,采用数字划消测验、连线测验(TMT)、WMS-III空间广度测验(WMS-III SST)、定步调连续加法任务测验(PASAT)、Stroop测验、木块图评估神经认知功能。结果:患者组血清BDNF水平低于对照组,差异有统计学意义(t=9.112,P0.01),患者组血清GDNF与对照组相比差异无统计学意义(t=1.513,P0.05)。患者组数字划消测验、TMT-A、TMT-B、Stroop测验、木块图、WMS-III SST逆行分、PASAT成绩均差于对照组(P0.05)。患者组血清BDNF水平与PANSS阳性症状分、数字划消测验中的错误个数呈负相关(分别为r=-0.295,P=0.026;r=-0.262,P=0.049),血清GDNF水平与Stroop色词干扰测验分呈正相关(r=0.263,P=0.048)。结论:慢性稳定期的精神分裂症患者仍存在广泛的神经认知损害。BDNF可能是精神分裂症的一种素质性标记,可能参与了患者的注意障碍。     

脑源性神经营养因子和抑郁症

抑郁症是以显著而持久的情绪低落或心境改变为主要特征的一组精神疾病。其高发病率、致死率、高疾病负担已引起社会各界的关注。然而,由于其发病机制的不详,患者很难获得完全治愈的机会。近年来,国内外研究者发现脑源性神经营养因子可能参与抑郁症的发病和治疗过程。脑源性神经营养因子(Brain-derived neurotrophic factor,BD-NF)在中枢神经系统及周围神经系统的多种神经元均有分布,尤以海马和皮层含量最高。其基因定位于11p13,酪氨酸激酶受体B(tyrosine kinase receptor,TrkB)是其特异性受体,当BDNF与TrkB结合时,受体分子二聚化,其多…     

脑源性神经营养因子和脑缺血

有证据表明BDNF在脑缺血的保护中起重要作用。BDNF保护缺血引起的神经细胞损伤的机制为(1)稳定细胞内钙离子水平,减少兴奋性氨基酸引起的损伤;(2)拮抗NO介导的细胞毒作用;(3)调节自由基代谢;(4)对损伤神经元具有修复作用。     

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。     

抑郁症患者血清脑源性神经营养因子水平及其相关因素

目的 探讨抑郁症患者血清脑源性神经营养因子水平及其相关因素,为防治抑郁症提供重要依据.方法 采用酶联免疫吸附法和汉密尔顿抑郁量表分别测定40例抑郁症患者(患者组)的血清BDNF水平和抑郁严重程度,并与49名正常者(对照组)进行对比分析.结果 患者组治疗前血清BDNF水平明显降低,与对照组比较差异有统计学意义(P＜0.01).患者组治疗8周末血清BDNF水平明显升高,HAMD总分明显降低,与治疗前比较差异有统计学意义(P＜0.05).患者组治疗前后血清BDNF水平与性别及年龄均呈负相关,差异具有统计学意义(P＜0.05),与受教育程度、病程及HAMD总分比较无统计学意义(P＞0.05).结论 抑郁症患者存在血清BDNF水平的下降,抗抑郁治疗可改善抑郁症状,并显著提高血清BDNF水平.     

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.     

精神分裂症首次发病未治疗患者血清脑源性神经营养因子水平测定

目的:了解首发精神分裂症未治疗患者脑源性神经营养因子(BDNF)水平的变化,为临床诊治提供一定的依据。方法:抽取初诊的住院或门诊符合ICD-10精神分裂症诊断标准首发未治疗患者计66例,正常对照组40例。入组后使用阳性和阴性症状量表(PANSS)判别精神症状程度,抽取晨血,测定血清BDNF浓度。结果:精神分裂症患者血清BDNF水平(21.35±3.94)ug/L,显著低于正常对照组[(23.68±6.14)ug/L,P0.05];未治疗时间与血清BDNF水平具有相关性(r=3.216,P0.05)。结论:精神分裂症患者未治疗期越长,BDNF水平下降越明显,提示BDNF水平或许是精神分裂症患者发展的生物学指标之一。     

脑源性神经营养因子和精神分裂症认知功能障碍的研究进展

脑源性神经营养因子(brain derived neurotrophic factor,BDNF)与精神分裂症认知功能障碍之间的关系引起越来越多学者的关注。目前研究发现,BDNF与精神分裂症认知功能障碍的病理生理过程、动物模型的建立、抗精神药物的治疗以及认知功能训练等多方面均存在联系。     

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

Objective To investigate the possible role of brain-derived neurotrophic factor(BDNF)in the pathophysiology of attempted suicide in depressive episode patients.Methods The subjects were 23 depressive episode patients who had recently attempted suicide.24 depressive episode patients without suicide attempt.and 30 sex-age-and education matched healthy controls.The Hamihon Depression Rating Scale-24 items(HAMD24),Beck Helpless Rating Scale(BHS)and Self-rating Idea of Suicide Scale (SIOSS)was used to evaluate the severitv of symptoms.The seruln level of BDNF was detected with sandwich ELISA.Pearson correlation coefficients wag used to measure the correlations between serum BDNF and the related illness variables.Results There were significant difierences in the serum level of BDNF between patients with attempted suicide,pailents without suicide attempt and normal controls(F=21.927,P＜0.05).Post hoc analysis showed the serum BDNF levels in patients with attempted suicide [(57 ±16)ng/L]were lower than that in patients without[(75±28)ns/L;P＜0.05],and were lower in patients without suicide attempt[(75 ±28)ng/L]than that in normal controls[(111 ±39)ng/L;P＜0.01].In patients with attempted suicide,the serum BDNF was negatively correlated to the duration of depressive episode(r=-0.541,P=0.008),the mean BHS score(r=-0.494,P=0.017)and the mean SIOSSscore(r=-0.754.P=0.000).Conclusion The results suggest that the decreased serum brain-derived neurotrophic factor is related to the pathophysiology of attempted suicide in depressive episode patients.     

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

Objective To investigate the possible role of brain-derived neurotrophic factor(BDNF)in the pathophysiology of attempted suicide in depressive episode patients.Methods The subjects were 23 depressive episode patients who had recently attempted suicide.24 depressive episode patients without suicide attempt.and 30 sex-age-and education matched healthy controls.The Hamihon Depression Rating Scale-24 items(HAMD24),Beck Helpless Rating Scale(BHS)and Self-rating Idea of Suicide Scale (SIOSS)was used to evaluate the severitv of symptoms.The seruln level of BDNF was detected with sandwich ELISA.Pearson correlation coefficients wag used to measure the correlations between serum BDNF and the related illness variables.Results There were significant difierences in the serum level of BDNF between patients with attempted suicide,pailents without suicide attempt and normal controls(F=21.927,P＜0.05).Post hoc analysis showed the serum BDNF levels in patients with attempted suicide [(57 ±16)ng/L]were lower than that in patients without[(75±28)ns/L;P＜0.05],and were lower in patients without suicide attempt[(75 ±28)ng/L]than that in normal controls[(111 ±39)ng/L;P＜0.01].In patients with attempted suicide,the serum BDNF was negatively correlated to the duration of depressive episode(r=-0.541,P=0.008),the mean BHS score(r=-0.494,P=0.017)and the mean SIOSSscore(r=-0.754.P=0.000).Conclusion The results suggest that the decreased serum brain-derived neurotrophic factor is related to the pathophysiology of attempted suicide in depressive episode patients.     

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

Objective To investigate the possible role of brain-derived neurotrophic factor(BDNF)in the pathophysiology of attempted suicide in depressive episode patients.Methods The subjects were 23 depressive episode patients who had recently attempted suicide.24 depressive episode patients without suicide attempt.and 30 sex-age-and education matched healthy controls.The Hamihon Depression Rating Scale-24 items(HAMD24),Beck Helpless Rating Scale(BHS)and Self-rating Idea of Suicide Scale (SIOSS)was used to evaluate the severitv of symptoms.The seruln level of BDNF was detected with sandwich ELISA.Pearson correlation coefficients wag used to measure the correlations between serum BDNF and the related illness variables.Results There were significant difierences in the serum level of BDNF between patients with attempted suicide,pailents without suicide attempt and normal controls(F=21.927,P＜0.05).Post hoc analysis showed the serum BDNF levels in patients with attempted suicide [(57 ±16)ng/L]were lower than that in patients without[(75±28)ns/L;P＜0.05],and were lower in patients without suicide attempt[(75 ±28)ng/L]than that in normal controls[(111 ±39)ng/L;P＜0.01].In patients with attempted suicide,the serum BDNF was negatively correlated to the duration of depressive episode(r=-0.541,P=0.008),the mean BHS score(r=-0.494,P=0.017)and the mean SIOSSscore(r=-0.754.P=0.000).Conclusion The results suggest that the decreased serum brain-derived neurotrophic factor is related to the pathophysiology of attempted suicide in depressive episode patients.     

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

Objective To investigate the possible role of brain-derived neurotrophic factor(BDNF)in the pathophysiology of attempted suicide in depressive episode patients.Methods The subjects were 23 depressive episode patients who had recently attempted suicide.24 depressive episode patients without suicide attempt.and 30 sex-age-and education matched healthy controls.The Hamihon Depression Rating Scale-24 items(HAMD24),Beck Helpless Rating Scale(BHS)and Self-rating Idea of Suicide Scale (SIOSS)was used to evaluate the severitv of symptoms.The seruln level of BDNF was detected with sandwich ELISA.Pearson correlation coefficients wag used to measure the correlations between serum BDNF and the related illness variables.Results There were significant difierences in the serum level of BDNF between patients with attempted suicide,pailents without suicide attempt and normal controls(F=21.927,P＜0.05).Post hoc analysis showed the serum BDNF levels in patients with attempted suicide [(57 ±16)ng/L]were lower than that in patients without[(75±28)ns/L;P＜0.05],and were lower in patients without suicide attempt[(75 ±28)ng/L]than that in normal controls[(111 ±39)ng/L;P＜0.01].In patients with attempted suicide,the serum BDNF was negatively correlated to the duration of depressive episode(r=-0.541,P=0.008),the mean BHS score(r=-0.494,P=0.017)and the mean SIOSSscore(r=-0.754.P=0.000).Conclusion The results suggest that the decreased serum brain-derived neurotrophic factor is related to the pathophysiology of attempted suicide in depressive episode patients.     

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

Objective To investigate the possible role of brain-derived neurotrophic factor(BDNF)in the pathophysiology of attempted suicide in depressive episode patients.Methods The subjects were 23 depressive episode patients who had recently attempted suicide.24 depressive episode patients without suicide attempt.and 30 sex-age-and education matched healthy controls.The Hamihon Depression Rating Scale-24 items(HAMD24),Beck Helpless Rating Scale(BHS)and Self-rating Idea of Suicide Scale (SIOSS)was used to evaluate the severitv of symptoms.The seruln level of BDNF was detected with sandwich ELISA.Pearson correlation coefficients wag used to measure the correlations between serum BDNF and the related illness variables.Results There were significant difierences in the serum level of BDNF between patients with attempted suicide,pailents without suicide attempt and normal controls(F=21.927,P＜0.05).Post hoc analysis showed the serum BDNF levels in patients with attempted suicide [(57 ±16)ng/L]were lower than that in patients without[(75±28)ns/L;P＜0.05],and were lower in patients without suicide attempt[(75 ±28)ng/L]than that in normal controls[(111 ±39)ng/L;P＜0.01].In patients with attempted suicide,the serum BDNF was negatively correlated to the duration of depressive episode(r=-0.541,P=0.008),the mean BHS score(r=-0.494,P=0.017)and the mean SIOSSscore(r=-0.754.P=0.000).Conclusion The results suggest that the decreased serum brain-derived neurotrophic factor is related to the pathophysiology of attempted suicide in depressive episode patients.