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No se detectó ningún locus de esquizofrenia mayor en el cromosoma 1q en una gran muestra multicéntrica
Douglas F Levinson1, Peter A Holmans, Claudine Laurent
1Department of Psychiatry, University of Pennsylvania, Philadelphia, PA 19104, USA. dfl@mail.med.upenn.edu
Science (New York, N.Y.)
|April 27, 2002
Resumen
Este estudio no encontró ningún vínculo genético significativo entre la esquizofrenia y el cromosoma 1q en una gran muestra de familias. Estos hallazgos sugieren que si existen genes de susceptibilidad a la esquizofrenia en el cromosoma 1q, sus efectos son probablemente mínimos.
Área de la Ciencia:
- Genética La genética.
- La psiquiatría es la psiquiatría.
- Biología Molecular Biología Molecular
Sus antecedentes:
- Informes anteriores sugirieron un vínculo genético entre la esquizofrenia y el cromosoma 1q.
- La identificación de factores genéticos para la esquizofrenia es crucial para comprender su etiología.
Objetivo del estudio:
- Evaluar rigurosamente el vínculo genético reportado de la esquizofrenia con el cromosoma 1q.
- Para investigar la heterogeneidad potencial en las señales de enlace a través de diferentes muestras de familias.
Principales métodos:
- La genotipización de 16 marcadores de ADN a través de 107 centimorgans del cromosoma 1q.
- Análisis de una muestra multicéntrica que incluye 779 pedigríes informativos de esquizofrenia.
- Análisis estratificados que incluyen familias de origen europeo, modelos de herencia recesiva y familias con múltiples individuos afectados.
Principales resultados:
- No se observó evidencia significativa de vínculo genético entre la esquizofrenia y el cromosoma 1q.
- No se detectó una heterogeneidad significativa en la distribución de alelos entre las ocho muestras individuales.
- Los análisis de subgrupos tampoco pudieron producir evidencia significativa de vínculo.
Conclusiones:
- La evidencia sustancial para el vínculo de la esquizofrenia con el cromosoma 1q no está respaldada por este estudio a gran escala.
- Si los genes de susceptibilidad para la esquizofrenia se encuentran en el cromosoma 1q, su contribución general a la enfermedad es probablemente pequeña.
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