Study on genes of the serotonergic system and suicidal behavior: protocol for a case–control study in Mexican population

BMC Psychiatry

María Antonia Jiménez-Santos²  María Lilia López-Narváez³  Humberto Nicolini⁵  Alma Genis⁵  Mario Villar-Soto⁶  Martha Patricia Velázquez-Sánchez⁴  Sherezada Pool García⁴  Isela Juárez-Rojop¹  Thelma Beatriz González-Castro¹  Carlos Alfonso Tovilla-Zárate² 

[1] Universidad Juárez Autónoma de Tabasco, División Académica de Ciencias de la Salud, Villahermosa, Tabasco, México;División Académica Multidisciplinaria de Comalcalco, Ranchería Sur, Cuarta Sección, CP 86650 Comalcalco, Tabasco, México;Hospital General de Yajalón, Yajalón, Chiapas, México;Hospital General de Comalcalco, Tabasco, Secretaría de Salud, Comalcalco, Tabasco, México;Instituto Nacional de Medicina Genómica (INMEGEN), Servicios de Atención Psiquiátrica (SAP), Secretaría de Salud, México, DF, México;Hospital de Alta Especialidad “Gustavo A. Rovirosa P”, Villahermosa, Tabasco, México

关键词: Mexican population;    Association;    Serotonin receptor;    Suicide;   

Others  :  1123801
DOI  :  10.1186/1471-244X-14-29

 received in 2014-01-27, accepted in 2014-02-03,  发布年份 2014

【 摘 要 】

Background

Suicidal behavior is a leading cause of injury and death worldwide. Several studies have provided a possible relationship between genetic factors and suicidal behavior. Also, these studies have shown evidence for altered serotonergic neural transmission in the pathogenesis of suicidal behavior. In addition, genes pertaining to the serotonergic system have been proposed as candidates to establish biological correlates between suicidal behavior and the serotonergic system. The most studied genes are SCL6A4, HTR2A, HTR2C, HTR1A, HTR1B, TPH-1, and TPH-2. To get a comprehensive understanding of the association with suicidal behavior we will conduct genotype assays studies in a Mexican population.

Methods/Design

We will conduct a case–control study. The population sample will comprise adolescent and adult patients admitted for attempted of suicide and diagnosed by a psychiatrist. A peripheral blood sample will be taken from all the subjects (cases and controls). Genomic DNA from the leukocytes blood sample will be extracted. The genotypes of interest are distributed in the following genes: SCL6A4, HTR2A, HTR1A, HTR1B, HTR2C, TPH-2 and TPH-1. All the samples will be analyzed using a polymerase chain reaction (PCR) end-point method. We will evaluate the Hardy-Weinberg Equilibrium. The chi-squared test or Fisher’s exact test will be used to compare genotype and allele frequencies between control and case groups. The Quanto 1.2 software will measure the sample size of the association. For all the association analyses the level of significance will be set at p = 0.05 and the confidence interval at 95%.

Discussion

Suicidal behavior has been increase in Mexico, principally in young population. Our study will demonstrate the association between serotoninergic genes and suicide behavior in Mexican population.

【 授权许可】

   
2014 Tovilla-Zárate et al.; licensee BioMed Central Ltd.

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