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Emergencias (St. Vicenç dels Horts) ; 20(2): 93-100, abr. 2008. tab
Article in Es | IBECS | ID: ibc-63098

ABSTRACT

Objetivos: Investigar la posible asociación entre cuatro polimorfismos serotoninérgicos (A-1438G (rs6311) y T102C (rs6313) del gen del receptor 5-HT2A y STin2 VNTR y 5-HTTLPR del gen SLC6A4) e impulsividad de la tentativa suicida (TS).Método: 180 pacientes (Asturias – Norte de España) que habían realizado una tentativa suicida fueron evaluados utilizando la Suicidal Intent Scale (SIS) y, posteriormente, genotipados utilizando métodos estándar. Las TS fueron divididas en dos subgrupos: impulsivas (puntuaciones inferiores a 6 puntos) o no impulsivas (6 o más puntos), utilizándola subescala de planificación suicida de la SIS. Resultados: Edad media (SD) de la muestra total = 35,6 (12,5) años; mujeres: 63,3%.La mayoría de los pacientes (95,6%) tenían al menos un diagnóstico psiquiátrico. Los diagnósticos más prevalentes fueron: trastornos afectivos (36,7%), esquizofrenia y otras psicosis (18,3%), trastornos de ansiedad (12,2%) y trastornos de la personalidad(11,1%). En un 49,4% se constató la existencia de TS previas. Un 64,4% de las TS fueron de tipo impulsivo. Los polimorfismos A-1438G y T102C estaban en completo desequilibrio de ligamiento en nuestra población. El genotipo –1438GG y el alelo –1438Gfueron más prevalentes entre los pacientes que realizaron TS impulsivas [34,5% vs14,1%, X2 (2) = 11,5, p corregida = 0,012; 0,59 vs 0,41; X2 (1) = 11,2, p corregida =0,004, OR = 2,11 (1,36-3,27), respectivamente]. No se encontraron diferencias en las distribuciones genotípicas o alélicas de los polimorfismos del gen SLC6A4.Conclusiones: Variaciones polimórficas del gen 5-HT2A podrían predisponer hacia la realización de TS de tipo impulsivo (AU)


Objective: To determine the association between four serotonergic polymorphisms (A-1438G (rs6311) and T102C(rs6313) of the 5-HT2A receptor gene, and STin2 VNTR and 5-HTTLPR of the SLC6A4 gene) and impulsivity in suicide attempts (SA).Methods: 180 suicide attempters from Asturias (Northern Spain) were assessed using the Suicidal Intent Scale (SIS)and genotyped by standard methods. According to the SIS definition SA were divided into two subgroups (impulsive and non-impulsive). A score of 6 on the planning subscale was used to classify attempts as impulsive or non-impulsive. Results: Mean age (SD) was 35.6 (12.5) years and about 63.3% of cases were female. Most of patients (95.6%) had at least one psychiatric diagnosis. More prevalent diagnoses were affective disorders (36.7%), schizophrenia and other psychosis (18.3%), anxiety disorders (12.2%), and personality disorders (11.1%). Previous SA was found in 49.4% of cases. About 64.4% of SA patients were classified as impulsive SA. A-1438G and T102C polymorphisms were in complete linkage disequilibrium in our population. We found and excess of –1438GG genotype and –1438G allele when compared impulsive SA with the non-impulsive group (34.5% vs 14.1%, X2 (2) = 11.5, corrected P = 0.012; 0.59% vs0.41%, X2 (1) = 11.2, corrected P = 0.004, OR = 2.11 (1.36-3.27), respectively). No differences in genotypic or allele frequencies of the SLC6A4 gene polymorphisms were found. Conclusions: Our findings suggest that polymorphic variants on the 5-HT2A gene may predispose for impulsive suicidal behaviour (AU)


Subject(s)
Humans , Suicide, Attempted , Polymorphism, Genetic , Mental Disorders/epidemiology , Genome Components/genetics , DNA/analysis
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