Positive association between GRIN2B gene and bipolar disorder in the Chinese Han Population

In the present work we genotyped three single-nucleotide polymorphisms (SNPs) (rs7301328, rs1805247, and rs1805502) of the GRIN2B gene in a set of 480 unrelated bipolar disorder patients and 480 unrelated genetically matched normal controls in Chinese Han population by either allelic-specific multiplex ligation-detection reaction (AMLR) technology or direct sequencing. Rs1805247 and the haplotype consisting of rs1805502 and rs1805247 were significantly associated, suggesting GRIN2B as having a role in the etiology of bipolar disorder.     

Positive association between SIAT8B and schizophrenia in the Chinese Han population

The Sialyltransferase 8B gene (SIAT8B) is located at 15q26, a susceptibility region for both schizophrenia and bipolar disorder. The protein encoded by this gene has an important role in neural development and sialic acid synthesis on the neural cell adhesion molecule (NCAM). Previous research had indicated that the promoter region of SIAT8B is associated with schizophrenia in the Japanese population. To take this further we carried out an association study based on 643 unrelated schizophrenics and 527 unrelated healthy subjects, all Han Chinese, recruited from Shanghai. Although our results differed from those of the Japanese research, rs3759915, also located in the promoter region of SIAT8B, showed nominally significant association with schizophrenia (P = 0.0036). Moreover, haplotypes constructed from rs3759915 and another two SNPs reported in the Japanese study (rs3759914 and rs3759916, also located in promoter region of SIAT8B) which located in the same LD block were significantly associated with schizophrenia (global P = 0.0000050). Our findings indicate that SIAT8B may be a candidate susceptibility gene for schizophrenia in the Chinese Han population and may also provide further support for the potential importance of polysaccharide-synthesizing genes in the etiology of schizophrenia.     

Analysis of association between common variants in the SLCO6A1 gene with schizophrenia,bipolar disorder and major depressive disorder in the Han Chinese population

Objectives The SLCO6A1 gene belongs to a superfamily of genes which is known to be a solute carrier family of OATPs (SLCO). The SLCO6A1 gene encodes OATP6A1 protein in humans. A previous genome-wide association study (GWAS) of schizophrenia conducted in the Swedish population demonstrated a significant association of rs6878284, which is located in the SLCO6A1 gene, with schizophrenia. To further investigate whether this gene is also a risk locus for schizophrenia (SCZ), bipolar disorder (BPD) and major depressive disorder (MDD) in the Han Chinese population, a case–control study was designed. Methods In total 1,248 unrelated SCZ cases, 1,344 BPD cases, 1,056 unrelated MDD cases and 1,248 normal controls were analysed in this study. We genotyped five SNPs using the Sequenom MassARRAY platform. Results We found no association of rs6878284 with SCZ [Corrected P_allele?=?0.969, Corrected P_genotype?=?0.997]. Furthermore, we found a statistically significant association of the rs7734060 genotype with MDD after correction [rs7734060: Corrected P_allele?=?0.114, Corrected P_genotype?=?0.036] in the Han Chinese population. Conclusions This is the first study which reveals no association of rs6878284 with SCZ and also predicts that rs7734060 could be a risk locus for MDD in the Han Chinese population.     

Gene expression and association analyses of LIM (PDLIM5) in bipolar disorder and schizophrenia

We previously reported that expression level of LIM (ENH, PDLIM5) was significantly and commonly increased in the brains of patients with bipolar disorder, schizophrenia, and major depression. Expression of LIM was decreased in the lymphoblastoid cells derived from patients with bipolar disorders and schizophrenia. LIM protein reportedly plays an important role in linking protein kinase C with calcium channel. These findings suggested the role of LIM in the pathophysiology of bipolar disorder and schizophrenia. To further investigate the role of LIM in these mental disorders, we performed a replication study of gene expression analysis and performed genetic association studies. Upregulation of LIM was confirmed in the independent sample set obtained from Stanley Array Collection. No effect of sample pH or medication was observed. Genetic association study revealed the association of single nucleotide polymorphism (SNP)1 (rs10008257) with bipolar disorder. In an independent sample set, SNP2 (rs2433320) close to SNP1 was associated with bipolar disorder. In total samples, haplotype of these two SNPs was associated with bipolar disorder. No association was observed in case-control analysis and family-based association analysis in schizophrenia. These results suggest that SNPs in the upstream region of LIM may confer the genetic risk for bipolar disorder.     

Analysis of association between common SNPs in ErbB4 and bipolar affective disorder, major depressive disorder and schizophrenia in the Han Chinese population

Neuregulin-1 (NRG1) is associated with schizophrenia. As one of the receptors of NRG1, v-erb-a erythroblastic leukemia viral oncogene homolog 4 (ErbB4) has also been reported to be associated with schizophrenia. Since there can be shared genetic variants among bipolar affective disorder, major depressive disorder and schizophrenia, we tested the association between ErbB4 and these three major psychiatric disorders in the Han Chinese population. Five single nucleotide polymorphisms (SNPs) were selected based on previous positive reports and linkage disequilibrium information of the HapMap Han Chinese individuals from Beijing (CHB) + individuals from Tokyo, Japan (JPT) population. These SNPs were genotyped in 1140 bipolar affective disorder (BPAD) patients, 1140 schizophrenia (SCZ) patients, 1139 major depressive disorder (MDD) patients and 1140 normal controls. Two SNPs (rs707284 and rs839523) showed nominal significance in the BPAD patients but this was eliminated after permutation. No significant association between ErbB4 and the two other psychiatric disorders was observed, nor did haplotype analysis reveal any positive signal.     

Association study of the norepinephrine transporter gene polymorphisms and bipolar disorder in Han Chinese population.

Many studies have indicated that the norepinephrine transporter (NET) may play an important role in the mechanisms underlying affective disorders. Thus, the genes of the NET (SLC6A2) are good candidates for research on bipolar disorder (BPD). This study examined whether the NET gene is a susceptibility factor for the BPD in Han Chinese. A promoter -182 T/C polymorphism (rs 2242446) and the exonic polymorphism 1287 G/A (rs 5569) of the NET gene were analysed using a polymerase chain reaction (PCR)-based method in 261 BPD patients and 245 unrelated, age- and gender-matched controls. Furthermore, to reduce the clinical heterogeneity, we also carried out analysis in clinical subgroups of bipolar patients defined according to type I and type II BPD, presence or absence of family history of major affective disorders and the age at onset of BPD. No significant difference was found between either bipolar patients or its more homogeneous subgroups and healthy controls in the genotype and allele frequencies for the investigated NET polymorphisms. Our results suggest that the investigated polymorphisms of NET are not major risk factors responsible for predisposition to BPD or its clinical subtypes in Han Chinese. However, replication studies with larger different ethnic samples are needed.     

他克莫司结合蛋白5基因多态性与抑郁症的关联研究

目的 探讨他克莫司(FK506)结合蛋白5(FKBP5)基因多态性与抑郁症之间的关系.方法 采用高温连接酶检测反应法,检测254例抑郁症患者(患者组)和231名正常对照者(对照组)的FKBP5基因rs3800373,rs1360780 2个位点基因型,分析基因型和等位基因频率在2组间的分布差异,及其与患者临床症状表型之间的关系.结果 (1)患者组FKBP5基因rs3800373位点GG、GT、TT基因型频率分别为4.7％、41.9％、53.4％,对照组分别为6.6％、38.2％、55.3％,2组比较差异无统计学意义(x2=1.252,P＞0.05);患者组FKBP5基因rs1360780位点CC、CT、TT基因型频率分别为55.4％、39.9％、4.7％,对照组分别为56.8％、37.0％、6.2％,2组比较差异无统计学意义(x2=0.739,P＞0.05);FKBP5基因rs3800373和rs1360780 2个位点等位基因频率在2组之间分布的差异无统计学意义(P均＞0.05);(2)单倍型分析显示,rs3800373-rs1360780 2个位点单倍型在患者组和对照组之间分布的差异无统计学意义(P均＞0.05);(3)rs3800373和rs1360780 2个位点不同基因型患者之间汉密尔顿抑郁量表、汉密尔顿焦虑量表和简明精神病评定量表各因子分值的差异均无统计学意义(P均＞0.05).结论 FKBP5基因rs3800373,rs1360780多态性可能与抑郁症缺乏关联.     

中国汉族人群5-羟色胺转运体基因多态性与神经性厌食的关联研究

目的:探讨中国汉族人群5-羟色胺转运体基因启动子区域(5-HTTLPR)多态性与神经性厌食的关系。方法:应用聚合酶链反应-限制性片段长度多态性(PCR-RFLP)技术对198例神经性厌食患者和225例正常健康对照者进行基因分型和关联分析。结果:①5-HTTLPR基因的3种基因型S/S、L/S和L/L在神经性厌食组的分布频率分别为65.7%、26.8%、7.6%,对照组为48.8%、37.8%、13.4%,两组差异有统计学意义(P<0.05)。等位基因S、L在神经性厌食组的分布分别为79.0%、21.0%,对照组为69.3%、30.7%,差异有统计学意义(P<0.05)。患病与携带L等位基因成负关联(OR=0.52,95%CI:0.35～0.77),患病与L/S基因型成负关联(OR=0.52,95%CI:0.34～0.79)。②5-HTTLPR功能三等位基因型(LA/LA、S/LA+LA/LG、S/S+S/LG+LG/LG)在神经性厌食组分布频率分别为2.0%、12.2%、85.8%,对照组为4.1%、23.4%、72.5%,两组差异有统计学意义(P<0.05)。患病与携带LA等位基因成负关联(OR=0.44,95%CI:0.25～0.77),患病与S/LA基因型成负关联(OR=0.44,95%CI:0.24～0.81)。结论::5-HTTLPR基因启动子区域多态性与中国汉族人群AN可能存在关联,L、LA等位基因及L/S、S/LA基因型为AN患病的保护等位基因及基因型。     

No association between thrombosis and factor V gene polymorphisms in Chinese Han population

Activated protein C resistance (APCR) is the most common hereditary condition of thrombosis in Western countries. And it is significantly linked to a single nucleotide polymorphisms (SNPs) in the coagulation factor V gene that results in the mutations at R506, R306 and HR2 alleles. To determine the prevalence of APCR and its association with the factor V gene SNPs in Chinese Han thrombotic patients, we investigated a total of 346 Chinese thrombotic patients and 140 normal controls for APCR using the APTT-based assays, according to manufacturer's instructions, APC ratio 相似文献   

中国汉族人群5-羟色胺2C受体基因rs518147位点多态性与强迫症的关联性

目的:探讨中国汉族群体5-羟色胺2C受体基因(5-HTR2C)启动区相关单核苷酸多态(SNP)位点rs518147多态性的分布状况及其与强迫症之间的关系。方法:采用直接测序法分析中国汉族群体符合中国精神障碍分类与诊断标准第3版或国际疾病分类第10版强迫症诊断标准的患者308例(强迫症组:男123例,女185例)和410名健康对照(对照组:男175名,女235名)5-HTR2Crs518147位点半合子(男性)或基因型(女性)分布频率,并分析半合子(男性)或基因型(女性)分布频率与强迫症发病的遗传易感性的关系。结果:强迫症组中5-HTR2C启动区rs518147位点男性患者携带G半合子与女性患者携带G+(GG与GC)基因型的比率均显著高于对照组(男性:χ2=4.973,P=0.026;女性:χ2=5.243,P=0.022),G等位基因的频率明显高于对照组(χ2=4.611,P=0.032)。结论:中国汉族群体中5-HTR2C启动区rs518147位点多态性可能与强迫症遗传易感性相关。     

There is no association between the serotonin receptor gene and bipolar I disorder in the Korean population

Abstract

Objective: Despite the close relationship between the functional polymorphism C(-1019)G (rs6295) of the serotonergic 1A receptor (5-HT1A) and mood, few studies have investigated the relationship between rs6295 and bipolar disorder. Aims: In this study, we aimed to investigate whether rs6295 is associated with clinical prognosis and treatment response in patients with bipolar I disorder acute manic episodes. Methods: One hundred twenty-eight patients with bipolar I disorder and one hundred sixty-eight healthy controls were recruited. Associations between patients with bipolar I disorder and healthy controls were compared. In addition, age at onset, number of admissions, and treatment response, including response rate, mean changes in manic symptoms, number of anti-manic agents and the total dosage of mood stabilizers for acute manic symptoms were compared between the rs6295 GG and CG+ CC groups in patients with bipolar I disorder. We conducted a separate subgroup analysis according to gender. Results: There were no differences in frequency between patients and controls. In patients with bipolar disorder, clinical prognosis and treatment response were no different between GG and CG+ CC groups. However, in a subgroup analysis according to gender, male, but not female, patients in the GG group had a longer duration of illness and a greater number of both previous episodes and psychiatric ward admissions than did the GC+ CC group. Conclusions: Further studies should investigate the relationship between 5-HT1A polymorphisms and bipolar disorder in terms of mood episode and gender.     

SCN8A as a novel candidate gene associated with bipolar disorder in the Han Chinese population

Background

Bipolar disorder (BPD) is a common, severe and recurrent psychiatric disorder. It has been suggested that BPD patients have a higher risk of suicide than patients with any other psychiatric illnesses. A recent study found that suicide attempt was associated with the SCN8A gene, which has been mapped close to one of the BPD susceptibility loci. Thus, SCN8A is likely to be a candidate gene for BPD.

Methods

In this study, three SNPs (rs1601012, rs303810, rs60637) were analyzed in 506 bipolar patients and 507 controls of Han origin.

Results

We found that two individual SNPs showed statistically significant differences between cases and controls in both allele and genotype distribution, but only rs303810 was still significant in allele distribution (p = 0.0164) after correction. No obvious linkage disequilibrium or haplotypes were observed among these SNPs.

Conclusion

Our results indicate that SCN8A may be a potential susceptibility gene for bipolar disorder in the Han Chinese population.     

No association between a polymorphism of the adenylate cyclase type IX gene and major depressive disorder in the Chinese Han population

Previous studies have demonstrated that a missense single-nucleotide polymorphism variant (2316A>G;rs2230739)of the adenylate cyclase type IX gene was associated with bipolar disorder and affective disorder.We determined genotype and allele frequencies using a ligase detection reaction method in 315 patients with major depressive disorder and 278 unrelated, sex-matched healthy control subjects.We did not detect any statistically significant differences in genotype and allele frequencies between patients and healthy control subjects.Furthermore,we found no significant difference between genders in major depressive disorder,nor between patients and controls in the same gender.These results suggest that 2316A>G(rs2230739)may not be a risk factor for increasing susceptibility to major depressive disorder in the Chinese Han population.     

RELN基因rs12705169位点与女性偏执型精神分裂症关联

目的以中国汉族偏执型精神分裂症患者为研究对象,重复验证RELN(Reelin)基因单核苷酸多态性与精神分裂症的关联性。方法以美国精神障碍诊断与统计手册第四版为诊断标准(Diagnostic and StatisticalManual of Mental Disorders-Fourth Edition,DSM-Ⅳ)在河南省北部地区收集326例偏执型精神分裂症患者(男女各半),在同一地域招募健康体检者334名(男女各半)作为对照,检测RELN基因rs12705169、rs11764507和rs17157643单核苷酸多态性位点。结果仅发现患者组和对照组之间rs12705169位点的基因型和等位基因频率差异有统计学意义(P<0.01)。按性别分层后进一步分析,rs12705169在女性患者和对照之间基因型和基因频率分布差异具有统计学意义(CC:OR=0.27,95%CI=0.18～0.45;AC:OR=0.43,95%CI=0.29～0.63,P<0.01)。结论RELN基因多态性与中国女性偏执型汉族精神分裂症存在关联,RELN基因可能是精神分裂症的易感基因。     

No association between the PREP gene and lithium responsive bipolar disorder

Background

The Edinburgh Postnatal Depression Scale (EPDS) is a widely used instrument to measure postnatal depression. This study aimed to translate and to test the reliability and validity of the EPDS in Iran.

Methods

The English language version of the EPDS was translated into Persian (Iranian language) and was used in this study. The questionnaire was administered to a consecutive sample of 100 women with normal (n = 50) and caesarean section (n = 50) deliveries at two points in time: 6 to 8 weeks and 12 to 14 weeks after delivery. Statistical analysis was performed to test the reliability and validity of the EPDS.

Results

Overall 22% of women at time 1 and 18% at time 2 reported experiencing postpartum depression. In general, the Iranian version of the EPDS was found to be acceptable to almost all women. Cronbach's alpha coefficient (to test reliability) was found to be 0.77 at time 1 and 0.86 at time 2. In addition, test-rest reliability was performed and the intraclass correlation coefficient was found to be 0.80. Validity as performed using known groups comparison showed satisfactory results. The questionnaire discriminated well between sub-groups of women differing in mode of delivery in the expected direction. The factor analysis indicated a three-factor structure that jointly accounted for 58% of the variance.

Conclusion

This preliminary validation study of the Iranian version of the EPDS proved that it is an acceptable, reliable and valid measure of postnatal depression. It seems that the EPDS not only measures postpartum depression but also may be measuring something more.     

去甲肾上腺素转运体基因与中国汉族人群重性抑郁症关联分析

目的探讨去甲肾上腺素转运体(NET)基因T-182C和G1287A多态性与中国汉族人群重性抑郁症(MD)之间的关系。方法采用性别、年龄1∶1配对的病例对照设计,纳入符合美国精神障碍诊断与统计手册第4版(DSM-Ⅳ)MD诊断标准的患者152例和正常对照152名。应用聚合酶链反应(PCR)和DNA直接测序技术,检测NET基因的T-182C和G1287A多态性,并进行关联及单倍型分析。结果①患者组与对照组间T-182C多态性基因型和等位基因频率分布差异无显著性(Х2=3.934,P>0.05;Х2=1.738,P>0.05),两组间G1287A多态性基因型和等位基因频率分布差异亦无显著性(Х2=2.545,P>0.05;Х2=1.502,P>0.05);②单倍型分析显示两组间上述两个位点的C-A单倍型频率具有显著性差异(Х2=4.045,P<0.05,OR=1.889),患者组C-A单倍型频率明显高于对照组。结论去甲肾上腺素转运体基因可能是中国汉族人群重性抑郁症的易感基因。     

5-羟色胺转运体基因启动子区域多态性与汉族强迫症的关联分析

目的探讨5-羟色胺转运体（Serotonin transporter,5-HTT）基因SLC6A4（solute car-rier family6,member4）启动子区域上44个碱基对插入/缺失多态性与汉族强迫症的关系,研究强迫症病理生理机制。方法将符合《疾病及有关健康问题的国际分类》（第10版,ICD-10）诊断标准的23例强迫症患者,及其父母纳入研究。用PCR法检测判定各自的基因型,用传递不平衡检测（transmission disequilibriumtest,TDT）及单体型相对风险检测（haplotype-based haplotype relative risk,HHRR）测其等位基因的传递是否平衡。结果在所收23个核心家系中,共有24个父母为杂和基因型,在24个杂合子父母中,13个传递了‘l’等位基因,11个传递了‘s’等位基因,未发现有传递不平衡存在（χ^2 DT=0.167,P〉0.05;χ^2HRR=0.820,P〉0.05）。结论5-羟色胺转运体基因启动子区域多态性与中国汉族强迫症可能不存在关联。     

Positive association of the oxytocin receptor gene (OXTR) with autism in the Chinese Han population.

BACKGROUND: Previous research has suggested that the social impairments exhibited by individuals with autism are associated with changes in plasma oxytocin (OT) levels. The physiologic effects of oxytocin are mediated through its specific receptors (OTRs), and numerous studies have implicated OTRs in the regulation of social cognition and behavior. Animal models and linkage data from genome screens indicate that the oxytocin receptor gene (OXTR) is an excellent candidate for research concerning psychiatric disorders, particularly those involving social impairments, such as autism. METHODS: We genotyped four single nucleotide polymorphisms (SNPs) located within the OXTR gene of 195 Chinese Han autism trios, using polymerase chain reaction-restriction fragment length polymorphism analysis. RESULTS: The family-based association test (FBAT) revealed a significant genetic association between autism and two of the SNPs tested (rs2254298 A: Z = 2.287, p = .0222; rs53576 A: Z = 2.573, p = .0101). When haplotypes were constructed with two, three, and four markers, the haplotype-specific FBAT revealed that a number of haplotypes, particularly those involving rs53576, were significantly associated with autism. Furthermore, haplotypes constructed with all markers showed a significant excess transmission for the specific and global haplotype analyses (p = .0020 and .0289, respectively). CONCLUSIONS: These data suggest an involvement of OXTR in the susceptibility to autism, and replication is important.