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Santos NBPD, de Paula Filho MFF, Silva AMDS, Teló EP, Junior JBDN, de Queiroz Balbino V, Takenami IO, Cansanção IF. Allele Frequencies and Forensic Data of 25 STR Markers for Individuals in Northeast Brazil. Genes (Basel) 2023; 14:1185. [PMID: 37372365 DOI: 10.3390/genes14061185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 05/26/2023] [Accepted: 05/27/2023] [Indexed: 06/29/2023] Open
Abstract
Identifying DNA markers such as Short Tandem Repeats (STR) can be used to investigate genetic diversity based on levels of heterozygosity within and between populations. Allele frequencies and forensic data for STRs were obtained from a sample of 384 unrelated individuals living in Bahia, Northeastern Brazil. Thus, the present study aimed to identify the allele frequency distribution, in addition to the forensic and genetic data, of 25 STR loci in the population of Bahia. Buccal swabs or fingertip punctures were utilized to amplify and detect 25 DNA markers. The most polymorphic loci were SE33 (43), D21S11, and FGA (21). The least polymorphic were TH01 (6), TPOX, and D3S1358 (7). Forensic and statistical data were obtained through data analysis, which revealed a large genetic diversity, with an average value of 0.813 for the analyzed population. The present study was more robust than previous STR marker studies and will contribute to future research on population genetics in Brazil and worldwide. The results of this study allowed the establishment of haplotypes found in the forensic samples of Bahia State to serve as a reference in the elucidation of criminal cases and paternity tests, as well as population and evolutionary investigations.
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Affiliation(s)
- Natalia Bahia Pinheiro Dos Santos
- Escola de Ciências da Saúde, Universidade Salvador, Salvador 41720-200, BA, Brazil
- Laboratório de Investigação do Vínculo Genético, Centro de Diagnóstico do GACC (CDG), Grupo de Apoio à Criança com Câncer (GACC), Salvador 41250-010, BA, Brazil
| | - Márcio Fabrício Falcão de Paula Filho
- Medicine Collegiate, Campus Paulo Afonso, Federal University of San Francisco Valley (UNIVASF), Amizade Avenue, 1900, Paulo Afonso 48605-780, BA, Brazil
| | - Abigail Marcelino Dos Santos Silva
- Laboratory of Bioinformatics and Evolutionary Biology, Department of Genetics, Federal University of Pernambuco, Recife 50740-580, PE, Brazil
| | - Enio Paulo Teló
- Laboratório de Investigação do Vínculo Genético, Centro de Diagnóstico do GACC (CDG), Grupo de Apoio à Criança com Câncer (GACC), Salvador 41250-010, BA, Brazil
| | - José Bandeira do Nascimento Junior
- Laboratory of Bioinformatics and Evolutionary Biology, Department of Genetics, Federal University of Pernambuco, Recife 50740-580, PE, Brazil
| | - Valdir de Queiroz Balbino
- Laboratory of Bioinformatics and Evolutionary Biology, Department of Genetics, Federal University of Pernambuco, Recife 50740-580, PE, Brazil
| | - Iukary Oliveira Takenami
- Medicine Collegiate, Campus Paulo Afonso, Federal University of San Francisco Valley (UNIVASF), Amizade Avenue, 1900, Paulo Afonso 48605-780, BA, Brazil
| | - Isaac Farias Cansanção
- Medicine Collegiate, Campus Paulo Afonso, Federal University of San Francisco Valley (UNIVASF), Amizade Avenue, 1900, Paulo Afonso 48605-780, BA, Brazil
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Genetic substrates of bipolar disorder risk in Latino families. Mol Psychiatry 2023; 28:154-167. [PMID: 35948660 DOI: 10.1038/s41380-022-01705-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 06/22/2022] [Accepted: 07/07/2022] [Indexed: 01/07/2023]
Abstract
Genetic studies of bipolar disorder (BP) have been conducted in the Latin American population, to date, in several countries, including Mexico, the United States, Costa Rica, Colombia, and, to a lesser extent, Brazil. These studies focused primarily on linkage-based designs utilizing families with multiplex cases of BP. Significant BP loci were identified on Chromosomes 18, 5 and 8, and fine mapping suggested several genes of interest underlying these linkage peaks. More recently, studies in these same pedigrees yielded significant linkage loci for BP endophenotypes, including measures of activity, sleep cycles, and personality traits. Building from findings in other populations, candidate gene association analyses in Latinos from Mexican and Central American ancestry confirmed the role of several genes (including CACNA1C and ANK3) in conferring BP risk. Although GWAS, methylation, and deep sequencing studies have only begun in these populations, there is evidence that CNVs and rare SNPs both play a role in BP risk of these populations. Large segments of the Latino populations in the Americas remain largely unstudied regarding BP genetics, but evidence to date has shown that this type of research can be successfully conducted in these populations and that the genetic underpinnings of BP in these cohorts share at least some characteristics with risk genes identified in European and other populations.
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da Silva Junior FC, Araujo RML, Sarmento ASC, de Carvalho MM, Fernandes HF, Yoshioka FKN, Pinto GR, Motta FJN, Canalle R. The association of A-1438G and T102C polymorphisms in HTR2A and 120 bp duplication in DRD4 with alcoholic dependence in a northeastern Brazilian male population. GENE REPORTS 2020. [DOI: 10.1016/j.genrep.2020.100889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Dos Santos ICC, Genre J, Marques D, da Silva AMG, Dos Santos JC, de Araújo JNG, Duarte VHR, Carracedo A, Torres-Español M, Bastos G, de Oliveira Ramos CC, Luchessi AD, Silbiger VN. A new panel of SNPs to assess thyroid carcinoma risk: a pilot study in a Brazilian admixture population. BMC MEDICAL GENETICS 2017; 18:140. [PMID: 29178884 PMCID: PMC5702224 DOI: 10.1186/s12881-017-0502-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Accepted: 11/15/2017] [Indexed: 01/09/2023]
Abstract
BACKGROUND Thyroid cancer is a common malignant disease of the endocrine system with increasing incidence rates over the last few decades. In this study, we sought to analyze the possible association of 45 single nucleotide polymorphisms (SNPs) with thyroid cancer in a population from Rio Grande do Norte, Brazil. METHODS Based on histological analysis by a pathologist, 80 normal thyroid specimens of tissue adjacent to thyroid tumors were obtained from the biobank at the Laboratory of Pathology of Liga Norte Riograndense Contra o Câncer, Natal, RN. Patient samples were then genotyped using the MassARRAY platform (Sequenon, Inc) followed by statistical analysis employing the SNPassoc package in R program. The genotypic frequencies of all 45 SNPs obtained from the International HapMap Project database and based on data from the ancestral populations of European and African origin were used to compose the control study group. RESULTS In our study, the following 9 SNPs showed significant differences in their frequency when comparing the study and control groups: rs3744962, rs258107, rs1461855, rs4075022, rs9943744, rs4075570, rs2356508, rs17485896, and rs2651339. Furthermore, the SNPs rs374492 C/T and rs258107 C/T were associated with a relative risk for thyroid carcinoma of 3.78 (p = 6.27 × 10e-5) and 2.91 (p = 8.27 × 10e-5), respectively, after Bonferroni's correction for multiple comparisons. CONCLUSIONS These nine polymorphisms could be potential biomarkers of predisposition to thyroid carcinoma in the population from Rio Grande do Norte. However, complementary studies including a control group with samples obtained from healthy subjects in Rio Grande do Norte state, should be conducted to confirm these results.
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Affiliation(s)
- Isabelle C C Dos Santos
- Department of Clinical Analysis and Toxicology of Federal University of Rio Grande do Norte, Rua General Gustavo Cordeiro de Farias s/n, CEP 59012-570, Natal, Rio Grande do Norte, Brazil
| | - Julieta Genre
- Health Sciences Posgraduation Programme, Federal University of Rio Grande do Norte, Natal, Brazil
| | - Diego Marques
- Department of Clinical Analysis and Toxicology of Federal University of Rio Grande do Norte, Rua General Gustavo Cordeiro de Farias s/n, CEP 59012-570, Natal, Rio Grande do Norte, Brazil
| | - Ananília M G da Silva
- Department of Clinical Analysis and Toxicology of Federal University of Rio Grande do Norte, Rua General Gustavo Cordeiro de Farias s/n, CEP 59012-570, Natal, Rio Grande do Norte, Brazil
| | - Jéssica C Dos Santos
- Department of Clinical Analysis and Toxicology of Federal University of Rio Grande do Norte, Rua General Gustavo Cordeiro de Farias s/n, CEP 59012-570, Natal, Rio Grande do Norte, Brazil
| | - Jéssica N G de Araújo
- Department of Clinical Analysis and Toxicology of Federal University of Rio Grande do Norte, Rua General Gustavo Cordeiro de Farias s/n, CEP 59012-570, Natal, Rio Grande do Norte, Brazil
| | - Victor H R Duarte
- Department of Clinical Analysis and Toxicology of Federal University of Rio Grande do Norte, Rua General Gustavo Cordeiro de Farias s/n, CEP 59012-570, Natal, Rio Grande do Norte, Brazil
| | - Angel Carracedo
- Grupo de Medicina Xenómica-CIBERER-Universidade de Santiago de Compostela. Fundación Pública Galega de Medicina Xenómica. Servicio Galego de Saúde, Santiago de Compostela, Spain.,Centro Nacional de Genotipado, PRB2- ISCIII. Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | - Maria Torres-Español
- Grupo de Medicina Xenómica-CIBERER-Universidade de Santiago de Compostela. Fundación Pública Galega de Medicina Xenómica. Servicio Galego de Saúde, Santiago de Compostela, Spain.,Centro Nacional de Genotipado, PRB2- ISCIII. Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | - Gisele Bastos
- Department of Clinical Analysis and Toxicology of São Paulo University, São Paulo, SP, Brazil
| | | | - André D Luchessi
- Department of Clinical Analysis and Toxicology of Federal University of Rio Grande do Norte, Rua General Gustavo Cordeiro de Farias s/n, CEP 59012-570, Natal, Rio Grande do Norte, Brazil
| | - Vivian N Silbiger
- Department of Clinical Analysis and Toxicology of Federal University of Rio Grande do Norte, Rua General Gustavo Cordeiro de Farias s/n, CEP 59012-570, Natal, Rio Grande do Norte, Brazil.
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Mafra F, Mazzotti D, Pellegrino R, Bianco B, Barbosa CP, Hakonarson H, Christofolini D. Copy number variation analysis reveals additional variants contributing to endometriosis development. J Assist Reprod Genet 2016; 34:117-124. [PMID: 27817035 DOI: 10.1007/s10815-016-0822-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Accepted: 09/22/2016] [Indexed: 01/21/2023] Open
Abstract
PURPOSE Endometriosis is a gynecological disease influenced by multiple genetic and environmental factors. The aim of the current study was to use SNP-array technology to identify genomic aberrations that may possibly contribute to the development of endometriosis. METHODS We performed an SNP-array genotyping of pooled DNA samples from both patients (n = 100) and controls (n = 50). Copy number variation (CNV) calling and association analyses were performed using PennCNV software. MLPA and TaqMan Copy-Number assays were used for validation of CNVs discovered. RESULTS We detected 49 CNV loci that were present in patients with endometriosis and absent in the control group. After validation procedures, we confirmed six CNV loci in the subtelomeric regions, including 1p36.33, 16p13.3, 19p13.3, and 20p13, representing gains, while 17q25.3 and 20q13.33 showed losses. Among the intrachromosomal regions, our results revealed duplication at 19q13.1 within the FCGBP gene (p = 0.007). CONCLUSIONS We identified CNVs previously associated with endometriosis, together with six suggestive novel loci possibly involved in this disease. The intergenic locus on chromosome 19q13.1 shows strong association with endometriosis and is under further functional investigation.
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Affiliation(s)
- Fernanda Mafra
- Collective Health Department, Division of Sexual and Reproductive Health Care and Population Genetics, Faculdade de Medicina do ABC, Santo André, SP, Brazil.
- Center for Applied Genomics, The Children's Hospital of Philadelphia, Philadelphia, PA, USA.
| | - Diego Mazzotti
- Center for Applied Genomics, The Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Renata Pellegrino
- Center for Applied Genomics, The Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Bianca Bianco
- Collective Health Department, Division of Sexual and Reproductive Health Care and Population Genetics, Faculdade de Medicina do ABC, Santo André, SP, Brazil
| | - Caio Parente Barbosa
- Collective Health Department, Division of Sexual and Reproductive Health Care and Population Genetics, Faculdade de Medicina do ABC, Santo André, SP, Brazil
| | - Hakon Hakonarson
- Center for Applied Genomics, The Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Denise Christofolini
- Collective Health Department, Division of Sexual and Reproductive Health Care and Population Genetics, Faculdade de Medicina do ABC, Santo André, SP, Brazil
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Moysés CB, Tsutsumida WM, Raimann PE, da Motta CHAS, Nogueira TLS, Dos Santos OCL, de Figueiredo BBP, Mishima TF, Cândido IM, de Oliveira Godinho NM, Beltrami LS, Lopes RK, Guidolin AF, Mantovani A, Dos Santos SM, de Souza CA, Gusmão L. Population data of the 21 autosomal STRs included in the GlobalFiler ® kits in population samples from five Brazilian regions. Forensic Sci Int Genet 2016; 26:e28-e30. [PMID: 27816398 DOI: 10.1016/j.fsigen.2016.10.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Revised: 10/04/2016] [Accepted: 10/24/2016] [Indexed: 01/20/2023]
Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | - Adelar Mantovani
- Laboratório DNA UDESC, Universidade do Estado de Santa Catarina (UDESC), SC, Brazil
| | | | | | - Leonor Gusmão
- Universidade Estadual do Rio de Janeiro (UERJ), Brazil; Instituto de Patologia e Imunologia Molecular da Universidade do Porto (IPATIMUP), Portugal
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Antenatal depression: Prevalence and risk factor patterns across the gestational period. J Affect Disord 2016; 192:70-5. [PMID: 26707350 DOI: 10.1016/j.jad.2015.12.017] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2015] [Revised: 11/13/2015] [Accepted: 12/11/2015] [Indexed: 11/23/2022]
Abstract
BACKGROUND The prevalence of antenatal depression (AD) among pregnant women varies according to the populations under study and the periods of evaluation. This paper investigated patterns of AD prevalence and risk factors in a Brazilian sample. METHODS Using semi-structured interviews as well as the Edinburgh Postnatal Depression Scale, the Beck Depression Inventory, and the Mini-International Neuropsychiatric Interview-Plus (MINI), 148 pregnant women were assessed in their second and third trimesters. Bivariate and multivariate analyses were used to determine the prevalence of and the significant risk factors for AD across both trimesters (p<0.05). RESULTS The prevalence of AD using the MINI was 13.5% and 10.1% in the second and third trimester, respectively. Prevalence rates using the symptom scales were even higher. In our bivariate analysis, lifetime major depression was the main AD risk factor (p<0.001), along with the number of sons (p=0.02) and intimate partner abuse (p=0.03). After adjustment for confounding factors, only lifetime major depression (p<0.001) and intimate partner abuse (p=0.02) remained as independent risk factors. There were no statistically significant differences in the AD prevalence rates and risk factors found when comparing across trimesters. LIMITATIONS The study is limited by possible selection bias introduced by the method of recruitment and the number of women lost to follow up. CONCLUSION AD prevalence rates found are close to the worldwide rates. Lifetime major depression was the main risk factor for AD in our study.
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Cordeiro Q, Vallada H. Association study between the Taq1A (rs1800497) polymorphism and schizophrenia in a Brazilian sample. ARQUIVOS DE NEURO-PSIQUIATRIA 2014; 72:582-6. [DOI: 10.1590/0004-282x20140100] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2014] [Accepted: 05/26/2014] [Indexed: 11/22/2022]
Abstract
Schizophrenia is a severe psychotic disorder with recurrent relapse and functional impairment. It results from a poorly understood gene-environment interaction. The Taq1A polymorphism (located in the gene cluster NTAD) is a likely candidate for schizophrenia. Its rs1800497 polymorphism was shown to be associated with DRD2 gene expression. Therefore the present work aims to investigate a possible association between schizophrenia and such polymorphism. The compared distribution of the alleles and genotypes of the studied polymorphism was investigated in a Brazilian sample of 235 patients and 834 controls. Genotypic frequencies were in Hardy-Weinberg equilibrium. There was a trend of allelic association between the Taq1A polymorphism (rs1800497) with schizophrenia in the studied sample. However no statistically differences were found between cases and controls when analyzed by gender or schizophrenia subtypes.
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Brunoni AR, Kemp AH, Shiozawa P, Cordeiro Q, Valiengo LCL, Goulart AC, Coprerski B, Lotufo PA, Brunoni D, Perez ABA, Fregni F, Benseñor IM. Impact of 5-HTTLPR and BDNF polymorphisms on response to sertraline versus transcranial direct current stimulation: implications for the serotonergic system. Eur Neuropsychopharmacol 2013; 23:1530-40. [PMID: 23615118 DOI: 10.1016/j.euroneuro.2013.03.009] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2012] [Revised: 02/06/2013] [Accepted: 03/19/2013] [Indexed: 12/16/2022]
Abstract
Transcranial direct current stimulation (tDCS) has been intensively investigated as a non-pharmacological treatment for major depressive disorder (MDD). While many studies have examined the genetic predictors of antidepressant medications, this issue remains to be investigated for tDCS. In the current study, we evaluated whether the BDNF Val66Met and the 5-HTT (5-HTTLPR) polymorphisms were associated with tDCS antidepressant response. We used data from a factorial trial that evaluated the efficacy of tDCS and sertraline and enrolled 120 moderate-to-severe, antidepressant-free participants. In the present study, we used analyses of variance to evaluate whether the BDNF (Val/Val vs. Met-carries) and 5-HTTLPR alleles (long/long vs short-carriers) were predictors of tDCS (active/sham) and sertraline (sertraline/placebo) response. Analyses were conducted on the polymorphisms separately and also on their interaction. Genotype frequencies were in Hardy-Weinberg equilibrium. BDNF polymorphism was not associated with treatment response. We found that 5-HTTLPR predicted tDCS effects as long/long homozygotes displayed a larger improvement comparing active vs. sham tDCS, while short-allele carriers did not. A dose-response relationship between active-sham differences with the long allele was also suggested. These results strengthen the role of the serotonergic system in the tDCS antidepressant effects and expand previous findings that reported that tDCS mechanisms of action partially involve serotonergic receptors. Therefore, we hypothesize that tDCS is a neuromodulation technique that acts over depression through the modulation of serotonergic system and that tDCS "top-down" antidepressant effects might not be optimal in brain networks with a hyperactive amygdala inducing bottom-up effects, such as occurs in short-carriers.
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Affiliation(s)
- A R Brunoni
- Hospital Universitário, University of São Paulo, São Paulo, Brazil; University of São Paulo Medical School, São Paulo, Brazil; Centro de Atenção Integrada em Saúde Mental, Faculdade de Ciências Médicas da Santa Casa de Misericórdia de São Paulo, São Paulo, Brazil.
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Cordeiro Q, Silva RTD, Vallada H. Association study between the rs165599 catechol-O-methyltransferase genetic polymorphism and schizophrenia in a Brazilian sample. ARQUIVOS DE NEURO-PSIQUIATRIA 2012; 70:913-6. [DOI: 10.1590/s0004-282x2012001200002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2012] [Accepted: 09/01/2012] [Indexed: 11/22/2022]
Abstract
Schizophrenia is a severe psychiatric disorder with frequent recurrent psychotic relapses and progressive functional impairment. It results from a poorly understood gene-environment interaction. The gene encoding catechol-O-methyltransferase (COMT) is a likely candidate for schizophrenia. Its rs165599 (A/G) polymorphism has been shown to be associated with alteration of COMT gene expression. Therefore, the present study aimed to investigate a possible association between schizophrenia and this polymorphism. The distribution of the alleles and genotypes of this polymorphism was investigated in a Brazilian sample of 245 patients and 834 controls. The genotypic frequencies were in Hardy-Weinberg equilibrium and no statistically significant differences were found between cases and controls when analyzed according to gender or schizophrenia subtypes. There was also no difference in homozygosis between cases and controls. Thus, in the sample studied, there was no evidence of any association between schizophrenia and rs165599 (A/G) polymorphism in the non-coding region 3' of the COMT gene.
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Updated Brazilian STR allele frequency data using over 100,000 individuals: An analysis of CSF1PO, D3S1358, D5S818, D7S820, D8S1179, D13S317, D16S539, D18S51, D21S11, FGA, Penta D, Penta E, TH01, TPOX and vWA loci. Forensic Sci Int Genet 2012; 6:504-9. [DOI: 10.1016/j.fsigen.2011.07.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2011] [Revised: 06/17/2011] [Accepted: 07/05/2011] [Indexed: 11/17/2022]
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Silva MAD, Cordeiro Q, Louzã M, Vallada H. Association between a SLC6A3 intron 8 VNTR functional polymorphism and ADHD in a Brazilian sample of adult patients. BRAZILIAN JOURNAL OF PSYCHIATRY 2011; 31:390-95. [PMID: 20098830 DOI: 10.1590/s1516-44462009000400020] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Aparecida da Silva M, Cordeiro Q, Louzã M, Vallada H. Lack of association between a 3'UTR VNTR polymorphism of dopamine transporter gene (SLC6A3) and ADHD in a Brazilian sample of adult patients. J Atten Disord 2011; 15:305-9. [PMID: 20332413 DOI: 10.1177/1087054710365989] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE To investigate a possible association between a 3'UTR VNTR polymorphism of the dopamine transporter gene (SLC6A3) and ADHD in a Brazilian sample of adult patients. METHOD Study Case-control with 102 ADHD adult outpatients ( DSM-IV criteria) and 479 healthy controls. The primers' sequence used were: 3'UTR-Forward: 5' TGT GGT GAT GGG AAC GGC CTG AG 3' and 3'UTR-Reverse: 5' CTT CCT GGA GGT CAC GGC TCA AGG 3'. Alleles of the 3'UTR were coded according to their number of repeats: 6- repeat 320 bp (allele 6), 8- repeat 400 bp (allele 8), 9- repeat 440 bp (allele 9), 10- repeat 480 bp (allele 10), and 11- repeat 520 bp (allele 11). RESULTS There were no allelic (χ(2) = 2.67, 5df, p = .75) and genotypic (χ(2) = 7.20, 1 df, p = .61) association between adult ADHD and VNTR 3'UTR polymorphism of SLC6A3. CONCLUSION Our findings do not support SLC6A3 as marker genetic susceptibility factor in adult ADHD. More comprehensive polymorphism coverage within the SLC6A3 region should be conducted in larger samples, including comparisons in clinical subgroups, and in samples with different ethnic backgrounds.
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Cordeiro Q, Siqueira-Roberto J, Vallada H. Association between the SLC6A3 A1343G polymorphism and schizophrenia. ARQUIVOS DE NEURO-PSIQUIATRIA 2011; 68:716-9. [PMID: 21049181 DOI: 10.1590/s0004-282x2010000500008] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2009] [Accepted: 03/17/2010] [Indexed: 05/26/2023]
Abstract
Epidemiological studies have demonstrated that the genetic component is an important risk factor for the development of schizophrenia. The genes that codify the different compounds of the dopaminergic system have created interest for molecular investigations in patients with schizophrenia because the antipsychotic drugs, especially those of first generation, act on this cerebral system. Thus the aim of the present study was to investigate the possible association between a new single nucleotide polymorphism (rs6347) located in exon 9 of the protein transporter (SLC6A3) and schizophrenia. The distribution of the alleles and genotypes of the studied polymorphism was investigated in a sample of 235 patients and 834 controls matched by gender and age. There were statistical differences in the allelic (χ²= 5.97, 1d.f. , p = 0.01, OR = 1.33-1.05 < OR < 1.69) and genotypic (χ² = 6.56, 2d.f. , p = 0.03) distributions between patients and controls. Thus the SLC6A3 A1343G polymorphism was associated to the SCZ phenotype in the investigated sample.
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Affiliation(s)
- Quirino Cordeiro
- Genetics and Pharmacogenetics Program, Department of Psychiatry, Medical School, University of São Paulo, São Paulo, SP, Brazil.
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Miguita K, Cordeiro Q, Shavitt RG, Miguel EC, Vallada H. Association study between genetic monoaminergic polymorphisms and OCD response to clomipramine treatment. ARQUIVOS DE NEURO-PSIQUIATRIA 2011; 69:283-7. [DOI: 10.1590/s0004-282x2011000300003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2010] [Accepted: 11/24/2010] [Indexed: 11/22/2022]
Abstract
In the present paper, we investigated the 5HTTLPR and STin2 polymorphisms in the promoter region of the serotonin transporter gene (SLC6A4), the G861C polymorphism (rs6296) of the serotonin receptor 1D beta (HTR1B), the T102C (rs6113) and C516T (rs6305) polymorphisms of the serotonin receptor gene subtype 2A (HTR2A), the DAT UTR, DAT intron 8 and DAT intron 14 of the dopamine transporter gene (SLC6A3), the Val-158-Met (rs4680) polymorphism of the COMT and the silent mutation G1287A (rs5569) in the norepinephrine transporter gene (SLC6A2). We genotyped 41 obsessive-compulsive disorder (OCD) outpatients, classified as good-responders (n=27) and poor-responders (n=14) to treatment with clomipramine according to the Yale Brown Obsessive-Compulsive Scale (YBOCS). Patients who achieved a reduction in symptoms of 40% or more in YBOCS after 14 weeks of treatment were considered good-responders. Genotypes and alleles distribution of the investigated polymorphisms were compared between both groups. We did not find association between the studied polymorphisms and clomipramine response in our sample.
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Affiliation(s)
- K Miguita
- University of São Paulo Medical School, Brazil; Adolfo Lutz Institute, Brazil
| | - Q Cordeiro
- University of São Paulo Medical School, Brazil
| | - R G Shavitt
- University of São Paulo Medical School, Brazil
| | - E C Miguel
- University of São Paulo Medical School, Brazil
| | - H Vallada
- University of São Paulo Medical School, Brazil
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Cordeiro Q, Noguti R, Bottino CM, Vallada H. Study of association between genetic polymorphisms of phospholipase A2 enzymes and Alzheimer's disease. ARQUIVOS DE NEURO-PSIQUIATRIA 2010; 68:189-93. [DOI: 10.1590/s0004-282x2010000200007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2009] [Accepted: 10/05/2009] [Indexed: 11/21/2022]
Abstract
Several genes have been related to late-onset Alzheimer's disease (LOAD). Phospholipases A2 (PLA2) influence the processing and secretion of the amyloid precursor protein, which gives rise to the beta-amyloid peptide, the major component of the amyloid plaque in AD. Hence, in the present study, polymorphisms of three genes encoding PLA2 enzymes group (cytosolic PLA2: BanI cPLA2 polymorphism; calcium-independent PLA2: AvrII iPLA2 polymorphism; PAFAH: Val279Phe PAFAH polymorphism) were analysed in a case-control sample using 58 patients with LOAD and 107 matched healthy controls. There was a genotypic association between the BanI cPLA2 polymorphism and LOAD (χ2=6.25, 2df, p=0.04), however there was no allelic association. There were no associations between AvrII iPLA2 and Val279Phe PAFAH polymorphisms and LOAD. These data suggest that the BanI cPLA2 polymorphism may play a role in the susceptibility for LOAD in our Brazilian sample.
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Salum GA, Blaya C, Manfro GG, Segal J, Leistner-Segal S. Emerging research groups studying Brazilian psychiatric genetics. BRAZILIAN JOURNAL OF PSYCHIATRY 2010; 32:91-2; author reply 92-4. [DOI: 10.1590/s1516-44462010000100017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
| | - Carolina Blaya
- Hospital de Clínicas de Porto; Universidade Federal do Rio Grande do Sul, Brazil
| | - Gisele Gus Manfro
- Hospital de Clínicas de Porto; Universidade Federal do Rio Grande do Sul, Brazil
| | - Jair Segal
- Universidade Federal do Rio Grande do Sul, Brazil; Hospital de Pronto Socorro de Porto Alegre, Brazil
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Cordeiro Q, Vallada H, Souza BR, Correa H, Romano-Silva MA, Guindalini C, Hutz MH. Population stratification in European South-American subjects and its importance to psychiatric genetics research in Brazil. BRAZILIAN JOURNAL OF PSYCHIATRY 2010; 32:93-4. [DOI: 10.1590/s1516-44462010000100018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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