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La distrofia muscular oculofaríngea en los hispanos de Nuevo México
M W Becher1, L Morrison, L E Davis
1Department of Cell Biology and Physiology, University of New Mexico HSC, BMSB 149, 915 Camino de Salud NE, Albuquerque, NM 87131, USA.
JAMA
|December 26, 2001
Resumen
La distrofia muscular oculofaríngea (OPMD) en Nuevo México afecta a las poblaciones hispanas, con síntomas como ptosis y disfagia. Si bien la OPMD causa una morbilidad significativa, no tiene impacto en la esperanza de vida.
Área de la Ciencia:
- Neurología Neurología.
- Genética La genética.
- Salud Pública La salud pública.
Sus antecedentes:
- La distrofia muscular oculofaríngea (OPMD) es una miopatía genética rara vinculada a la expansión repetida de polialanina en el gen PABP2.
- Esta condición afecta a poblaciones aisladas en todo el mundo, con una notable concentración observada en Nuevo México.
Objetivo del estudio:
- Caracterizar exhaustivamente las características clínicas, genéticas y demográficas de los pacientes con OPMD en Nuevo México.
- Comprender la prevalencia y las manifestaciones específicas de OPMD dentro de esta cohorte única.
Principales métodos:
- Un estudio de cohorte retrospectivo que analiza los registros médicos de 1965-2001.
- La inclusión de la confirmación genética en 10 pacientes y las evaluaciones clínicas en profundidad para 49 pacientes.
- Datos obtenidos del Hospital de la Universidad de Nuevo México y del Sistema de Salud VA de Nuevo México.
Principales resultados:
- Identificaron 216 casos de OPMD en 39 familias, que abarcan hasta cuatro generaciones, predominantemente de origen hispano del norte de Nuevo México.
- La ptosis y la disfagia se presentaron de manera similar en el inicio, seguidas de debilidad de las extremidades y problemas de marcha.
- Se encontró la expansión de repetición de polialanina del gen PABP2 idéntico ([GCG](9) en diez individuos de parientes distintos.
Conclusiones:
- La cohorte OPMD de Nuevo México exhibe características clínicas y genéticas clásicas, sin impacto en la longevidad pero con una morbilidad significativa.
- El origen de la mutación PABP2 sigue sin estar claro, posiblemente influenciado por el aislamiento geográfico y genético del norte de Nuevo México.
- Este estudio destaca la OPMD como una preocupación de salud significativa y no reconocida previamente en Nuevo México, instando a una mayor concienciación de los médicos, particularmente para las poblaciones hispanas en el suroeste.
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