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Zheng J, Yang X, Zhao Q, Tian S, Huang H, Chen Y, Xu Y. Association between gene polymorphism and depression in Parkinson's disease: A case-control study. J Neurol Sci 2017; 375:231-234. [PMID: 28320136 DOI: 10.1016/j.jns.2017.02.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Revised: 01/21/2017] [Accepted: 02/01/2017] [Indexed: 02/05/2023]
Abstract
OBJECTIVE To investigate possible associations of Parkinson's disease (PD) with polymorphism in depression-related genes and in the alpha-synuclein (SNCA) gene. METHODS A consecutive series of patients with PD were divided into those with depression and those without it. Patients (330) were genotyped at four single-nucleotide polymorphisms (SNPs) in four genes previously associated with depression, as well as four SNPs in the PD-associated SNCA gene. RESULTS Of 330 patients, 125 (37.9%) had depression and 205 (62.1%) did not. Univariate analysis revealed significant differences between the two groups in minor allele frequency at the SNP rs1545843 in the SLC6A15 gene (p<0.05), as well as in frequencies of genotypes and minor alleles at rs78162420 in the TPH2 gene (all p<0.05). Logistic regression identified the following risk factors for depression among patients with PD: Hoehn and Yahr stage>2 (OR 1.759, 95%CI 1.035-2.989, p=0.037), AA genotype at rs1545843 (OR 1.866, 95%CI 1.017-3.426, p=0.044), and AC genotype at rs78162420 (OR 5.036, 95%CI 1.451-17.484, p=0.011). CONCLUSIONS Among patients with PD, depression is associated with polymorphism at rs78162420 and rs1545843, both previously linked with depression. Our results may help clarify the pathogenesis of depression in PD.
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Affiliation(s)
- Jinhua Zheng
- Department of Neurology, West China Hospital, Sichuan University, 37 Guo Xue Xiang, Chengdu, Sichuan Province 610041, PR China
| | - Xinglong Yang
- Department of Neurology, West China Hospital, Sichuan University, 37 Guo Xue Xiang, Chengdu, Sichuan Province 610041, PR China
| | - Quanzhen Zhao
- Department of Neurology, West China Hospital, Sichuan University, 37 Guo Xue Xiang, Chengdu, Sichuan Province 610041, PR China
| | - Sijia Tian
- Department of Neurology, West China Hospital, Sichuan University, 37 Guo Xue Xiang, Chengdu, Sichuan Province 610041, PR China
| | - Hongyan Huang
- Department of Neurology, West China Hospital, Sichuan University, 37 Guo Xue Xiang, Chengdu, Sichuan Province 610041, PR China
| | - Yalan Chen
- Department of Neurology, West China Hospital, Sichuan University, 37 Guo Xue Xiang, Chengdu, Sichuan Province 610041, PR China
| | - Yanming Xu
- Department of Neurology, West China Hospital, Sichuan University, 37 Guo Xue Xiang, Chengdu, Sichuan Province 610041, PR China.
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Wang CH, Liu C, Cong EZ, Xu GL, Lv TT, Zhang YL, Ning QF, Wang JK, Nie HY, Li Y. Association of tryptophan hydroxylase-2 polymorphisms with oppositional defiant disorder in a Chinese Han population. Behav Brain Funct 2016; 12:30. [PMID: 27871272 PMCID: PMC5117514 DOI: 10.1186/s12993-016-0113-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Accepted: 11/04/2016] [Indexed: 01/21/2023] Open
Abstract
Background Oppositional defiant disorder (ODD) is a behavioral disorder of school-age population. It is well known that 5-HT dysfunction is correlated with impulsivity, which is one of the common characteristics of ODD. The enzyme tryptophan hydroxylase-2 (TPH-2) synthesizes 5-HT in serotonergic neurons of the midbrain raphe. The purposes of this study were to investigate the potential association of TPH-2 polymorphisms with susceptibility to ODD in a Han Chinese school population. Methods Four polymorphisms (rs4570625, rs11178997, rs1386494 and rs7305115) of the TPH-2 gene were analyzed by using polymerase chain reaction and DNA microarray hybridization in a case–control study of 276 Han Chinese individuals (124 ODD and 152 controls). Results In single marker analyses,there was a significant difference in the genotype (χ2 = 4.163, P = 0.041) and allele frequency (χ2 = 3.930, P = 0.047) of rs1386494 between ODD and control groups. Haplotype analyses revealed higher frequencies of haplotypes TA (rs4570625-rs11178997), TAG (rs4570625-rs11178997-rs1386494), TAA (rs4570625-rs11178997-rs7305115) and TAGA (rs4570625-rs11178997-rs1386494-rs7305115), but lower frequencies of haplotypes GA (rs4570625-rs11178997) and GAG (rs4570625-rs11178997-rs1386494) in ODD compared to control groups. Conclusions These findings suggest the role of these TPH-2 gene variants in susceptibility to ODD. Some haplotypes might be the risk factors for Chinese Han children with ODD, while others might be preventable factors.
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Affiliation(s)
- Chang-Hong Wang
- Department of Psychiatry, The Second Affiliated Hospital of Xinxiang Medical University (Psychiatric hospital of Henan province, China), Xinxiang, 453002, Henan, China
| | - Cong Liu
- Department of Psychiatry, The Second Affiliated Hospital of Xinxiang Medical University (Psychiatric hospital of Henan province, China), Xinxiang, 453002, Henan, China
| | - En-Zhao Cong
- Department of Psychiatry, The Second Affiliated Hospital of Xinxiang Medical University (Psychiatric hospital of Henan province, China), Xinxiang, 453002, Henan, China
| | - Gai-Ling Xu
- Department of Psychiatry, The Second Affiliated Hospital of Xinxiang Medical University (Psychiatric hospital of Henan province, China), Xinxiang, 453002, Henan, China
| | - Ting-Ting Lv
- Department of Psychiatry, The Second Affiliated Hospital of Xinxiang Medical University (Psychiatric hospital of Henan province, China), Xinxiang, 453002, Henan, China
| | - Ying-Li Zhang
- Department of Psychiatry, The Second Affiliated Hospital of Xinxiang Medical University (Psychiatric hospital of Henan province, China), Xinxiang, 453002, Henan, China
| | - Qiu-Fen Ning
- Department of Psychiatry, The Second Affiliated Hospital of Xinxiang Medical University (Psychiatric hospital of Henan province, China), Xinxiang, 453002, Henan, China
| | - Ji-Kang Wang
- Department of Psychiatry, The Second Affiliated Hospital of Xinxiang Medical University (Psychiatric hospital of Henan province, China), Xinxiang, 453002, Henan, China
| | - Hui-Yao Nie
- Department of Psychiatry, The Second Affiliated Hospital of Xinxiang Medical University (Psychiatric hospital of Henan province, China), Xinxiang, 453002, Henan, China.
| | - Yan Li
- Department of Child and Adolescent, Public Health College, Zhengzhou University, 100 Kexue Road, Zhengzhou, 450001, Henan, China.
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Arroyo L, Carreras R, Valent D, Peña R, Mainau E, Velarde A, Sabrià J, Bassols A. Effect of handling on neurotransmitter profile in pig brain according to fear related behaviour. Physiol Behav 2016; 167:374-381. [PMID: 27737780 DOI: 10.1016/j.physbeh.2016.10.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Revised: 08/26/2016] [Accepted: 10/07/2016] [Indexed: 01/02/2023]
Abstract
Chemical neurotransmitters (NT) are principal actors in all neuronal networks of animals. The central nervous system plays an important role in stress susceptibility and organizes the response to a stressful situation through the interaction of the dopaminergic and the serotonergic pathways, leading to the activation of the hypothalamus-pituitary-adrenal axis (HPA). This study was designed to investigate: a) the effects of stressful handling of pigs at the slaughterhouse on the neurotransmitter profile in four brain areas: amygdala, prefrontal cortex (PFC), hippocampus and hypothalamus, and b) whether the alterations in the brain NT profile after stressful handling were associated with fear, determined by the tonic immobility (TI) test. In the first place, the characterization of the NT profile allowed to distinguish the four brain areas in a principal component analysis. The most crucial pathway involved in the reaction of pigs to a stressful handling was the serotonergic system, and changes were observed in the amygdala with a decrease in serotonin (5-HT) and total indoleamines, and in the hippocampus, where this pathway was activated. Fearful and non-fearful pigs did not show significant differences in their NT profile in control conditions, but when subjected to a stressful handling in the slaughterhouse, fearful animals showed a significant variation in the serotonin pathway and, in a lesser extent, the dopamine (DA) pathway. In conclusion, the existence of an underlying biological trait - possibly fearfulness - may be involved in the pig's response toward stressful challenges, and the serotonergic system seems to play a central role in this response.
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Affiliation(s)
- Laura Arroyo
- Departament de Bioquímica i Biologia Molecular, Facultat de Veterinària, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Spain
| | - Ricard Carreras
- IRTA, Animal Welfare Subprogram, Veïnat de Sies, s/n, 17121 Monells, Spain
| | - Daniel Valent
- Departament de Bioquímica i Biologia Molecular, Facultat de Veterinària, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Spain
| | - Raquel Peña
- Departament de Bioquímica i Biologia Molecular, Facultat de Veterinària, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Spain; Servei de Bioquímica Clínica Veterinària, Facultat de Veterinària, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Spain
| | - Eva Mainau
- Departament de Ciència Animal i dels Aliments, Facultat de Veterinària, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Spain
| | - Antonio Velarde
- IRTA, Animal Welfare Subprogram, Veïnat de Sies, s/n, 17121 Monells, Spain
| | - Josefa Sabrià
- Departament de Bioquímica i Biologia Molecular, Facultat de Medicina, Institut de Neurociències, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Spain
| | - Anna Bassols
- Departament de Bioquímica i Biologia Molecular, Facultat de Veterinària, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Spain; Servei de Bioquímica Clínica Veterinària, Facultat de Veterinària, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Spain.
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Zhang Y, Chang Z, Chen J, Ling Y, Liu X, Feng Z, Chen C, Xia M, Zhao X, Ying W, Qing X, Li G, Zhang C. Methylation of the tryptophan hydroxylase‑2 gene is associated with mRNA expression in patients with major depression with suicide attempts. Mol Med Rep 2015; 12:3184-90. [PMID: 25955598 DOI: 10.3892/mmr.2015.3748] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Accepted: 04/09/2015] [Indexed: 11/06/2022] Open
Abstract
Tryptophan hydroxylase-2 (TPH2) contributes to alterations in the function of neuronal serotonin (5-HT), which are associated with various psychopathologies, including major depressive disorder (MDD) or suicidal behavior. The methylation of a single CpG site in the promoter region of TPH2 affects gene expression. Suicide and MDD are strongly associated and genetic factors are at least partially responsible for the variability in suicide risk. The aim of the present study was to investigate whether variations in TPH2 methylation in peripheral blood samples may predispose patients with MDD to suicide attempts. TPH2 mRNA expression levels differed significantly between 50 patients with MDD who had attempted suicide (MDD + suicide group) and 75 control patients with MDD (MDD group); TPH2 expression levels were significantly decreased (P=0.0005) in the patients who had attempted suicide. Furthermore, the frequency of TPH2 methylation was 36.0% in the MDD + suicide group, while it was 13.0% in the MDD group. The results of the present study demonstrated that methylation in the promoter region of TPH2 significantly affected the mRNA expression levels of TPH2, thus suggesting that methylation of the TPH2 promoter may silence TPH2 mRNA expression in MDD patients with or without suicidal behavior. In addition, there was a significant correlation between the methylation status of the TPH2 promoter and depression, hopelessness and cognitive impairment in the MDD + suicide group. In conclusion, the present study demonstrated that TPH2 expression was regulated by DNA methylation of the TPH2 promoter region in patients with MDD.
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Affiliation(s)
- Yuqi Zhang
- Department of Geriatric Psychiatry, Wuxi Psychiatric Hospital, Nanjing Medical University, Wuxi, Jiangsu 214151, P.R. China
| | - Zaohuo Chang
- Department of Geriatric Psychiatry, Wuxi Psychiatric Hospital, Nanjing Medical University, Wuxi, Jiangsu 214151, P.R. China
| | - Jionghua Chen
- Department of Brain, Jiangsu Province Academy of Traditional Chinese Medicine, Nanjing, Jiangsu 210028, P.R. China
| | - Yang Ling
- Clinical Oncology Laboratory, Changzhou Cancer Hospital of Soochow University, Changzhou, Jiangsu 213002, P.R. China
| | - Xiaowei Liu
- Department of Geriatric Psychiatry, Wuxi Psychiatric Hospital, Nanjing Medical University, Wuxi, Jiangsu 214151, P.R. China
| | - Zhang Feng
- Department of Geriatric Psychiatry, Wuxi Psychiatric Hospital, Nanjing Medical University, Wuxi, Jiangsu 214151, P.R. China
| | - Caixia Chen
- Department of Geriatric Psychiatry, Wuxi Psychiatric Hospital, Nanjing Medical University, Wuxi, Jiangsu 214151, P.R. China
| | - Minghua Xia
- Department of Geriatric Psychiatry, Wuxi Psychiatric Hospital, Nanjing Medical University, Wuxi, Jiangsu 214151, P.R. China
| | - Xingfu Zhao
- Department of Geriatric Psychiatry, Wuxi Psychiatric Hospital, Nanjing Medical University, Wuxi, Jiangsu 214151, P.R. China
| | - Wang Ying
- Department of Geriatric Psychiatry, Wuxi Psychiatric Hospital, Nanjing Medical University, Wuxi, Jiangsu 214151, P.R. China
| | - Xu Qing
- Department of Geriatric Psychiatry, Wuxi Psychiatric Hospital, Nanjing Medical University, Wuxi, Jiangsu 214151, P.R. China
| | - Guilin Li
- Department of Geriatric Psychiatry, Wuxi Psychiatric Hospital, Nanjing Medical University, Wuxi, Jiangsu 214151, P.R. China
| | - Changsong Zhang
- Clinical Oncology Laboratory, Changzhou Cancer Hospital of Soochow University, Changzhou, Jiangsu 213002, P.R. China
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