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Objective To investigate the spontaneous activity of brain neurons in patients with obsessive－compulsive disorder (OCD) under resting state. Methods Forty－eight OCD patients and 50 age－, gender－ and year of education－matched normal controls were enrolled. All the subjects underwent 3.0 T fMRI to acquire resting state brain image. The brain regions with significant differences in amplitude of low－frequency fluctuation (ALFF) between patients and controls were analyzed. Whole－brain functional connectivity (FC) were analyzed using the brain regions with significant differences as seed points, and the correlation between brain regions with significant differences in ALFF and FC analysis and obsessive－compulsive symptoms was analyzed. Results Compared to the control group, the ALFF of left dorsolateral prefrontal cortex increased in patients with OCD (t=4.305, P＜0.001). Compared to the controls, the analysis of whole－brain FC (based on MNI template) with the left dorsolateral prefrontal cortex as the regions of interest showed that the FC strength between the left dorsolateral prefrontal cortex and right orbital inferior frontal cortex (t=3.897, P＜0.001), left anterior cingulate cortex (t=3.370, P＜0.001), right anterior cingulate cortex (t=4.299, P＜0.001), left middle cingulate cortex (t=3.220, P＜0.001), right middle cingulate cortex (t=4.607, P＜0.001) enhanced; the FC strength between the left dorsolateral prefrontal cortex and the left opercular part of inferior frontal gyrus (t=－4.630, P＜0.001) weakened in patients with OCD. The FC between the left dorsolateral prefrontal cortex and the left opercular part of inferior frontal gyrus was negatively correlated with obsessions score(r=－0.369, P=0.014), compulsions score (r=－0.392, P=0.009) and total score (r=－0.393, P=0.008) of the Yale－Brown obsessive compulsive scale (Y－BOCS). Conclusion In patients with OCD, spontaneous neural activity of the left dorsolateral prefrontal cortex is enhanced in resting state, and the FC with multiple brain regions is abnormal. The FC strength between the left dorsolateral prefrontal cortex and the left opercular part of inferior frontal gyrus is associated with obsessive－compulsive symptoms.
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Objective To explore the cool execution function (CEF)and its influence factors before and after treatment in drug-na?ve, first-episode schizophrenics. Methods Twenty-one drug-naive, first-episode schizophrenics (patients group) and 25 healthy persons (control group) were interviewed by using the SCID. The severity of clinical symptoms was respectively assessed in patient group before treatment and after 8 weeks using the Positive and Negative Syndrome Scale (PANSS). The Trail-Marking Test A-B (TMT A-B) and Hanoi Tower Test (HTT) were conducted to assess cool executive function. Reaction time and the number of errors of TMT A-B’s and HTT’s reaction time and operative steps were recorded. Results Before treatment, the patient group’s reaction time was longer in HTT and TMT A-B than that in the control group's (P = 0.013;P = 0.000;P =0.001), respectively. Error number of TMT-B in the patient group was more than that in the control group (P =0.015); The operative steps of HTT and error number of TMT A were no statistical difference than those in the control group. After treatment, reaction time of TMT A reduced significantly than before treatment (P = 0.002);Before and after treatment , patients ’ reaction time of HTT and TMT B , operative steps of HTT and the error number of TMT A-B were all no statistical difference. Running multiple linear regression , reaction times of TMT-B was positively correlated with negative symptoms (β = 7.198,P = 0.012), and the error number of it was positively correlated with positive symptoms (β = 0.382,P = 0.024). Conclusions CEF in patients with drug-naive, first-episode schizophrenia is affected in a certain degree, especially the flexibility and attention transfer. Symptoms is the most serious influence factors. Treatment in sympotoms earlier is the important way to protect cool cognition.
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Objective:By observing the hippocampus 5-HT1A receptor expression, MDA content and SOD activity and the effect of lentinan mouse model of chronic stress behavior,serum TNF-αand IL-6 content.To investigate the mechanism of antidepressant LNT.Methods:Healthy adult mice were 50,male,body weight (20 ±2) g,SPF grade,based on 1% sucrose water partial addicted degrees and were randomly divided into four groups,namely,normal control group (Normal controls,NG),model in the control group ( Model control,MG) ,LNT dose group ( L-LNT,2.5 mg/kg;H-LNT,5.0 mg/kg).Before the experiment began modeling 1 h daily oral administration,continuous administration 28 d, each experimental group administered according 1.0 ml/100 g weight.Application chronic unpredictable mild stress model of depression produced,and make improvements.Normal control group,not to stimulate,food and water properly.Model group and the experimental intervention group with the lone support,fasting,water deprivation (24 h),and accept the unpredictable stressors,the 28 d of the experiment,the animals were randomized to receive daily each only one stimulus, within five days after making the choreography the stimulus program was not repeated and unpredictable.Animals were observed daily behavior change,with a strange environment to start feeding feeding experimentally observed incubation period,forced swim stress test record swim immobility time,enzyme-linked immunosorbent assay of serum TNF-α,IL-6 content ,NBT assay of total SOD activity,thio-barbituric acid (thiobarbituric acid,TBA) MDA content assay,immune proteins mark (Western blot) to detect 5-HT1A receptor expression levels.Results:MG mice in an unfamiliar environment, feeding latency was significantly prolonged after giving LNT intervention can shorten lead to chronic stress in mice feeding latency in an unfamiliar environment,prolonged chronic stress leads to significantly reduce the stress in mice swimming in water immobility time extension,and 5-HT1A receptor expression enhancing,LNT intervention group increased SOD,MDA content decreased serum TNF-αand IL-6 was significantly reduced,compared with the model group MG indicators above improvements were statistically significant ( P<0.05 or P<0.01 ).Conclusion:LNT can significantly antagonize depressive symptoms in mouse models of chronic stress,increased locomotor activity in mice time;LNT increase SOD,MDA content may antagonize the antidepressant effects and mechanisms related to LNT.
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ObjectiveTo analyze the association between single nucleotide polymorphisms (SNPs) in DISC1 gene.MethodsThe studied sample consisted of 528 patients with schizophrenia (264 males and 264 females) and 528 healthy controls (264 males and 264 females).Two function SNPs were selected and gcnotyped by Illumina Golden Gate assay.Genotype and allele frequencies were compared between patients and controls to assess the association to schizophrenia.The clinical features of the hospital first patients were further examined with the Positive and Negative Syndrome Scale (PANSS) before trcatment with antipsychotics.ResultsTwo SNPs were genotyped in subjects.A significant association was found between rs3737597 and schizophrenia in genotype (387:133:8,350:164:14) and allele frequencies (907:149,864:192,P＜0.05 ).Moreover,the haplotypes,A-A constructed from two SNPs showed significant differences between cases and controls ( P＜ 0.05).For rs821616,there were significant difference in positive syndrome score,delusions and poor rapport between patients with genotypes AA or not.ConclusionThis study describes a positive association between DISC(1) and schizophrenia in the Han Chinese population and DISC1 is the susceptible gene in schiz ophrenia.
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ObjectiveTo assess the association of rs1344706 and rs4667001 polymorphism of ZNF804A gene with schizophrenia,and the relationship between rs1344706 polymorphism and antipsychotic drug efficacy.MethodsThe studies concerning association of ZNF804A gene polymorphism with schizophrenia and its drug efficacy were retrieved in databases such as Medline and CNKI,and then screened according to the inclusion and exclusion criteria.Meta-analysis was performed by RevMan 5.1 following quality assessment and data extraction.ResultsEleven high-quality studies under the criteria were included.For rs1344706,T allele frequency was significant higher in the schizophrenia group than control group ( OR=1.13,95％ CI (1.06-1.21 ),P=0.0003).Moreover,for rs4667001,G allele frequency was significant higher in the schizophrenia group ( OR =1.14,95％ CI( 1.04-1.26),P =0.005 ).In addition,the difference of PANSS scores reduction between T allele and GG genotype carriers was not significant in both positive and negative symptoms after four-week treatment,and the same trend of difference was in the comparison between TT genotype and G allele carriers.ConclusionThe data supports that T allele of rs1344706 and G allele of rs4667001 in ZNF804A gene are associated with the susceptibility of schizophrenia,but rs1344706 polymorphism is not related to antipsychotic drug efficacy.
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ObjectiveTo analyze the gene expression of neuregulin1 (Nrg1)mRNA and protein in encephalic region and peripheral blood,and to explore the consistency of the expression in central and peripheral in schizophrenia model rat induced by dizocilpine maleate ( MK801 ).Methods30 adult male SD rats were randomly divided into 3 groups ( 10 cases per group):model group injected with MK801 (0.6 mg/kg and 100μl/20 g)on the right rear of ventrolateral compartment,control group 1 ( no treatment) and control group 2 injected with equal volume normal saline.Nrg1 mRNA was measured in peripheral blood and in prefrontal lobe by using semiquantitative RT-PCR in 3 groups,and Nrg1 protein was measured in encephalic region (prefrontal lobe,dentate band and hippocamp) by using immunohistochemistry.ResultsThere was significant difference of the amount of Nrg1 mRNA among 3 groups (for center:F=9.141,P =0.001 ;for peripheral blood F =8.389,P =0.001 ),and it was higher in model group ( center:2.08 ± 0.64; peripheral blood:1.43 ± 0.46) than that in two control groups ( control group1,center:1.17 ± 0.42,peripheral blood:0.78 ± 0.39 ; control group 2,center:1.31 ± 0.44,peripheral blood:0.79 ± 0.37 ),but no statistical significant difference existed between two control groups.There was positive correlation of Nrg1 mRNA between center and periphery.There was significant difference of Nrg1 protein in prefrontal lobe,dentate band and hippocamp among 3 groups ( F value was 7.275,21.50 and 4.619,and P value was 0.003,0.000 and 0.019,respectively),and it was higher in model( 7.71 ± 2.55,11.67 ± 1.83and 10.18 ±2.08,respectively)than that in two control groups( control group 1:4.89 ± 1.06,7.53 ± 1.14 and 7.10 ± 2.52,respectively; control group 2:5.31 ± 1.39,8.10 ± 1.60 and 7.81 ± 2.50),but no statistical significant difference existed between two control groups.ConclusionMK801 can effect on the expression of Nrg1 gene,Nrg1 mRNA and protein increase in MK801 model rat,and the change is synchronous between center and periphery.
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Objective To investigate the potential association of Ghrelin(GHRL)gene polymorphisms susceptible to schizophrenia by case-control study.Methods Six hundred and thirty-four patients,six hundred and six healthy control subjects were recruited.Four SNPs rs696217,rs26802,rs27647 and rs26311 were detected by the polymerase chain reaction-based-restriction fragment length polymorphism analysis.Results No significant differences in genotype or allele frequencies of the four SNPs were observed between schizophrenic patients and healthy controls (Pvalues of genotype frequencies were 0.649,0.944,0.410,0.826;P values of allele frequencies were 0.773,0.992,0.301,0.723).However,seven haplotypes(GAAG,GAGC,GAGG,GCGC,GCGG,TAGC,TAGG)showed significant differences in frequency between schizophrenic and control groups(P values were 0.011,0.001,1.76×10-6,9.84×10-10,1.38×10-9,2.12×10-5,2.57×10-6).Conclusion These data suggest that the GHRL gene may not be associated with susceptibility to schizophrenia in the Chinese Han population.However,the haplotype of GA may be the susceptive factor of schizophrenia.
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Objective To explore the diagnostic value of sympathetic skin response ( SSR) and P300 event-related potentials (ERP) in depression patients. Methods The SSRs and ERPs of 46 depressed patients and 42 normal healthy people were measured. Results Abnormal rates of SSR were observed in 84. 8% of the depressed group (39/46) and 78.3% (36/46) of the controls. Compared with those in the control group, the latency and amplitude of the SSRs were significantly longer and lower in the depressed group. Abnormal ERPs were observed in 89. 1% of the depressed group(41/46) compared with 78. 3% of the controls (36/46). The latency of N2 and P3 and the amplitude of P3 in the ERPs of the depressed patients were longer and lower in comparison with those in the control group. Hence there was a significant difference between two groups. There was a high positive correlation between N2 and P3 latency in the ERPs and the SSR readings in the depressed group, and between amplitude of P3 and SSR, while there was a significant negative correlation between latency and amplitude in the two indexes of P300 and SSR in the depressed group. Conclusion SSR and ERP have remarkable clinical value as diagnostic indexes for depres-