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.

Serum level of brain-derived neurotrophic factor and the related factors in depressive patients with suicide attempt

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.