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因子分析事例 精神分裂症患者神经养分因子血清浓度与临床症状相关性研讨

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[摘要]意图 研讨首发精力分裂症患者脑源性神经养分因子(BDNF)及神经成长因子(NGF)的血清浓度与临床症状的相关性。办法 以2015年9月~2016年11月我院前期干预科住院的38例首发精力分裂症患者和50例健康体检者为研讨目标,运用酶联免疫吸附法(ELISA)测定BDNF和NGF血清浓度,运用阳性和阴性症状量表(PANSS)鉴定患者组临床症状,对两组BDNF、NGF血清濃度进行比较,运用Pearson相关剖析对患者组PANSS分和BDNF、NGF血清浓度进行相关剖析。成果 患者组的血清BDNF水平[(2913.19±638.30)pg/ml]明显低于对照组[(3553.05±685.98)pg/ml](t=4.465,P<0.01)。患者组的血清NGF水平[(36.96±8.28)pg/ml]明显低于对照组[(44.30±10.94)pg/ml](t=3.450,P<0.01)。患者组BDNF血清浓度与PANSS各项分之间没有相关性;患者组NGF血清浓度与PANSS阴性分红负相关(r=-0.256,P<0.05),与PANSS总分、阳性分和一般分之间没有相关性;患者组BDNF与NGF血清浓度成正相关(r=0.378,P<0.01)。定论 精力分裂症患者存在认知功用危害,精力分裂症患者血清NGF或许影响神经成长发育;BDNF和NGF在精力分裂症发病机制中所起的效果类似。

[关键词]精力分裂症;脑源性神经养分因子;神经成长因子

[中图分类号] R749.05 [文献标识码] A [文章编号] 1674-4721(2017)07(a)-0050-03

Research on serum correlation of neurotrophin and clinical symptoms in first episode Schizophrenia

WAN Jing HUANG Cai-ying XUE Kun-xi HU Jing PING Jun-jiao DU Bao-guo

Department of Early Intervention,the Third People′s Hospital of Zhongshan,Guangdong Prouince,Zhongshan 528451,China

[Abstract]Objective To study the correlation among brain-derived neurotrophic factor(BDNF),nerve gowth factor(NGF)and the clinical manifestation in first episode schizophrenia.Methods Double antibody sandwich enzyme-linked immunosorbent assay (ELISA) was adopted to quantitate BDNF and NGF serum levels of 38 first episode schizophrenic patients hospitalized in Department of Early Intervention of our Hospital from September 2015 to November 2016 and 50 healthy people for medical examinations.Positive and negative syndrome scale(PANSS) was used to evaluate the clinical state of the patients.BNDF and NGF serum concentration of the two groups was analyzed.Pearson correlative analysis was adopted to analyze the correlation between BDNF,NGF serum concentrations and PANSS scores in patient group.Results No statistical differences was found in age,gender or years of education in two groups.Lower BDNF serum levels[(2913.19±638.30)pg/ml] were found(t=4.465,P<0.01)in the patient group than in healthy subjects[(355.3±685.98)pg/ml].Lower NGF serum concentrations[(36.96±8.28)pg/ml] were found (t=3.450,P<0.01)in the patient group than in the controls [(44.30±10.94)pg/ml].BDNF serum concentrations and PANSS scores were not correlated in patient group.There were no correlations found among,PANSS-positive scores,PANSS-general scores and PANSS-Total scores in the patient group,however,NGF serum levels were negatively related to PANSS-negtive scores in patient group (r=-0.256,P<0.05).BDNF was found positively related to NGF serum levels(r=0.378,P<0.01).Conclusion Cognitive impairments occurred in schizophrenic patients,and NGF in the serum may impact growth and development of nervous system.BDNF and NGF may play similar role on nosogenesis of schizophrenia.

[Key words]Schizophrenia;BDNF;NGF

精力分裂症的病因及发病机理没有清晰。现在对该病最有影响的假说是神经发育假说,尤其是大脑进行性发育妨碍的假说[1]。神经养分因子宗族的重要成员脑源性神经养分因子(BDNF)和神经成长因子(NGF),均在调理突触可塑性方面具有必定效果,也被广泛以为在调理认知功用发挥重要效果。BDNF和NGF也对多巴胺能神经元和五羟色胺神经元的存活、成长和坚持方面具有调控效果,故其或许在精力分裂症病理进程中发挥必定的效果[2]。既往有研讨显现精力分裂症BDNF和NGF的血清水平低于正常人群[3],本研讨以首发精力分裂症患者为研讨目标,比较了首发精力分裂症患者和对照组的BDNF、NGF血清浓度,进一步剖析了患者组BDNF、NGF血清浓度和PANSS各项分三者之间的相关性。

1材料与办法

1.1一般材料

以2015年9月~2016年11月在我院前期干预科住院的38例首发精力分裂症住院患者为研讨组。入组规范:①契合《世界疾病与相关健康问题计算分类》(International Statistical Classification of Diseases and Related Health Problems,ICD-10)中精力分裂症的确诊规范;②PANSS总分≥60分;③入院前未服过抗精力病药、抗抑郁剂、情感稳定剂与抗癫痫药;④无癫痫、脑炎等其他脑器质性疾病史,无药物成瘾史。以50名健康体检人员为正常对照组,对照目标均来自我院实习生、护工、护理等集体。两组均签署知情同意书。本研讨已经过医院道德委员会批阅。

1.2办法

研讨目标于入组后次日空腹取5 ml肘静脉血。采血后将血清别离,冰冻于-20℃冰箱待检测。选用武汉博士德生物工程有限公司试剂盒,选用双抗体夹心ELISA进行血清BDNF、NGF水平测定,操作进程按照说明书进行。临床症状由接受过PANSS鉴定共同性训练的2名精力科主治医师鉴定,鉴定要在患者入组1周内完结。

1.3计算学办法

选用SPSS 17.0进行计算剖析,计量材料选用t查验,运用Pearson进行相关剖析,P<0.05为差异有计算学含义。

2成果

2.1两组患者一般材料的比较

两组研讨目标的性别、年纪、受教育程度等方面差异无计算学含义(P>0.05)(表1)。

2.2两组患者血清BDNF、NGF浓度比较

患者组的血清BDNF水平[(2913.19±638.30)pg/ml]低于对照组[(3553.05±685.98)pg/ml],差异有计算学含义(t=4.465,P=0.000)。患者组的血清NGF水平[(36.96±8.28)pg/ml]低于对照组[(44.30±10.94)pg/ml],差异有计算学含义(t=3.450,P=0.001)(图1)。

2.3患者组的BDNF、NGF血清浓度和PANSS评分相关性剖析

患者组BDNF与NGF血清浓度成正相关(r=0.378,P=0.000);患者组的BDNF血清浓度与PANSS各项分之间未发现相关性(P>0.05);患者组NGF血清浓度和PANSS阴性分存在负相关(r=-0.468,P=0.003);NGF的血清浓度和其他PANSS评分之间无相关性(P>0.05)(表2)。

*P<0.05

3评论

本研讨显现,精力分裂症患者组的两种细胞养分因子BDNF、NGF血清浓度明显低于对照组,这与既往的研讨共同[4-5]。NGF关于胆碱能神经元的开展具有决定性的效果,胆碱能神经元与学习和记忆有密切关系。尸体解剖发现身后的大脑胆碱能活性下降。因而NGF或许具有潜在的进步认知功用的效果,这些也在精力分裂症中有所发现[6]。循环中神经养分因子浓度的改动,或许会导致神经结构的改动和认知功用的残缺,尤其是会影响到信息加工,这往往是精力分裂症呈现最根底的生化改动。神经成长因子的缺乏,或许是精力分裂症的一个生化内涵表型[7-8]。本研讨的成果支撑这必定论。有动物实验研讨标明,血液中BDNF水平能够反映脑安排中BDNF的水平,且有研讨标明精力分裂症患者大腦中BDNF mRNA水平缓蛋白表达水平也较正常人下降[9]。有研讨显现,BDNF能够促进神经细胞的生计,添加突触可塑性及神经再生,且能影响中脑边际体系与多巴胺体系间的相互效果[10]。多巴胺假说指出,多巴胺能受体异常在精力分裂症发作进程中具有重要效果,而BDNF能够经过调控多巴胺D1受体功用,而与中脑边际多巴胺体系存在相互效果,故而估测BDNF或许是参加精力分裂症病理生理进程的重要物质[11-12]。BDNF、NGF在神经元发育及功用坚持中起重要效果,其水平的下降或许会导致脑功用的危害,尤其是信息传递方面的功用残缺,进而导致脑的病理改动,或许对精力分裂症的发病进程起到至关重要的效果[13]。本研讨提示了这两种神经养分因子的缺失导致神经维护效果削弱,必定程度上导致精力分裂症的发病,但详细机制尚不清晰。

别的,本研讨还显现NGF血清浓度与患者的PANSS阴性症状分红负相关,与之前的研讨共同[14]。精力分裂症患者的阴性症状能够继续存在毕生,常常表现为缓慢地进行性加剧趋势,或许是大脑发育性危害的标志。有研讨标明,NGF对胆碱能神经元有重要的养分效果,其浓度改动会导致脑的危害继而影响认知功用[15]。咱们并没有发现BDNF与PANSS分相关,但发现精力分裂症患者中NGF与BDNF的血清浓度成正相关。BDNF和NGF作为神经养分宗族的重要成员,有着类似的神经维护效果,本研讨成果可估测这两种因子在精力分裂症的病理生理机制中所起的效果类似。

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(收稿日期:2017-05-02 本文編辑:崔建中)

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