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Inicio Revista de Psiquiatría y Salud Mental (English Edition) Role of serotonergic polymorphisms in the clinical severity of the panic disorde...
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Vol. 2. Núm. 1.
Páginas 35-41 (enero 2009)
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Vol. 2. Núm. 1.
Páginas 35-41 (enero 2009)
Acceso a texto completo
Role of serotonergic polymorphisms in the clinical severity of the panic disorder
Implicación de polimorfismos serotoninérgicos en la gravedad clínica del trastorno de pánico
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1049
Pilar A. Sáiza,
Autor para correspondencia
frank@uniovi.es

Corresponding author.
, Sara Martínez-Barrondob, María P. García-Portillaa, Paul Corcorana,c, Blanca Moralesd, María-Teresa Bascarana, Begoña Paredese, Victoria Álvarezd, Eliecer Cotod, Juan M. Fernándeza, Manuel Bousoñoa, Julio Bobesa
a Department of Psychiatry, School of Medicine, University of Oviedo, Centro de Investigación Biomédica en Red de Salud Mental, CIBERSAM, 33006 Oviedo, Spain
b Mental Health Services of Asturias (SESPA), Mieres, Spain
c National Suicide Research Foundation, Cork, Ireland
d Laboratory of Molecular Genetics, Hospital Universitario Central de Asturias, Oviedo, Spain
e Emergency Room, San Agustin Hospital, Aviles, Spain
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Información del artículo
Abstract
Introduction and objectives

To investigate the association between three serotonergic polymorphisms (A-1438G [rs6311] of the HTR2A gene, STin2 VNTR and 5-HTTLPR of the SLC6A4 gene) and the severity of panic and depression symptomatology among mental health outpatients with diagnosis of panic disorder (PD).

Methods

92 unrelated PD outpatients (DSM-IV criteria) from a homogeneous Spanish Caucasian population (mean age±SD, 35.9±12.4 years; 28 [30.4%] males) were assessed using the Panic and Agoraphobia Scale (PAS), and the Hamilton Depression Rating Scale (HDRS), and genotyped using standard methods.

Results

Age of onset of PD varied by STin2 VNTR genotype (F=3.21; p=0.045). On average, onset of PD occurred earlier for those with the 10/10 than for those with the 12/12 genotype (25.1 versus 33.3; p=0.043). No relationship was found between A-1438G, 5-HTTLPR, and STin2 VNTR genotypes and PAS or HDRS total scores. Variation in scores on the HDRS Anxiety subscale by A-1438G genotype almost reached statistical significance (F=3.03; p=0.053). Post hoc pairwise comparisons showed higher anxiety levels among A/G than among A/A carriers (4.1 versus 2.9; p=0.043). Finally, variation in scores on the Preoccupied with Health subscale of the PAS by 5-HTTLPR genotype approached statistical significance (F=2.56; p=0.083). Post hoc pairwise comparisons showed higher scores among L/S than among L/L carriers (2.4 versus 1.4; p=0.078).

Conclusions

Our data provide support of an involvement of the serotonin system, particularly, the HTR2A gene in the severity of PD.

Keywords:
Genetic association
Panic disorder
Polymorphisms
Serotonin transporter
Serotonin 2A receptor
Resumen
Inroducción y objetivos

Investigar la relación entre tres polimorfismos serotoninérgicos (A-1438G [rs6311] del gen HTR2A, STin2 VNTR y 5-HTTLPR del gen SLC6A4) y la gravedad de la sintomatología de pánico y depresión en pacientes ambulatorios con un diagnóstico de trastorno de pánico (TP).

Métodos

Se evaluó a un total de 92 pacientes ambulatorios con TP (criterios diagnósticos del DSM-IV) no emparentados, de una población española caucásica homogénea (media de edad±desviación estándar de 35,9±12,4 años; 28 [30,4%] varones) con el empleo de las escalas Panic and Agoraphobia Scale (PAS) y Hamilton Depression Rating Scale (HDRS), y se determinó su genotipo con métodos estándar.

Resultados

La edad de inicio del TP variaba según el genotipo STin2 VNTR (F=3,21; p=0,045). En promedio, el inicio del TP se produjo antes en los pacientes con el genotipo 10/10 que en los que presentaban el genotipo 12/12 (25,1 frente a 33,3; p=0,043). No se observó relación alguna entre los genotipos A-1438G, 5-HTTLPR y STin2 VNTR y las puntuaciones totales de las escalas PAS o HDRS. La variación en las puntuaciones de la subescala de Ansiedad de la HDRS en función del genotipo A-1438G alcanzaba casi la significación estadística (F=3,03; p=0,053). Las comparaciones post hoc de datos emparejados pusieron de manifiesto un grado de ansiedad mayor en los portadores del genotipo A/G que en los portadores del A/A (4,1 frente a 2,9; p=0,043). Por último, la variación de las puntuaciones de la subescala de Preocupación por la Salud de la PAS, en función del genotipo 5-HTTLPR, se aproximaba a la significación estadística (F=2,56; p=0,083). Las comparaciones post hoc para datos emparejados mostraron unas puntuaciones más altas en los portadores del genotipo L/S que en los portadores del L/L (2,4 frente a 1,4; p=0,078).

Conclusiones

Nuestros datos respaldan la participación del sistema serotoninérgico, y en especial del gen HTR2A, en la gravedad del TP.

Palabras clave:
Asociación genética
Trastorno de pánico
Polimorfismos
Transportador de serotonina
Receptor de serotonina 2A
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