2013, Número 3
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Rev Mex Neuroci 2013; 14 (3)
Alteraciones de los movimientos oculares sacádicos en las enfermedades poliglutamínicas
Rodríguez-Labrada R, Velázquez-Pérez L
Idioma: Español
Referencias bibliográficas: 65
Paginas: 150-158
Archivo PDF: 250.01 Kb.
RESUMEN
Las enfermedades poliglutamínicas comprenden un conjunto de desórdenes neurodegenerativos causados por la expansión del
número de repeticiones del trinucleótido
citosina-adenina-guanina (CAG) en regiones codificables de genes específicos. Unas de
las principales manifestaciones fenotípicas de estas entidades son las alteraciones de los movimientos oculares sacádicos.
Estos movimientos permiten cambiar, de manera rápida y precisa, la atención de un objeto en la escena visual hacia otro, sin
perturbar la agudeza visual. Su generación depende de un extenso circuito corticosubcortical y han sido ampliamente utilizados
como herramientas en investigaciones clínicas y básicas del SNC. En el presente trabajo se realiza una actualización del
conocimiento sobre las alteraciones de los movimientos oculares sacádicos en las enfermedades poliglutamínicas, haciendo
énfasis en su utilidad para el diagnóstico y la identificación de biomarcadores. En conclusión, las alteraciones sacádicas en las
enfermedades poliglutamínicas reflejan la vulnerabilidad de este sistema oculomotor a las expansiones de CAG. Su estudio
permite identificar parámetros útiles para el diagnóstico temprano, así como biomarcadores para la evaluación de terapias. Sin
embargo, se necesitan otros estudios para profundizar en la fisiopatología de estas alteraciones.
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