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Locus para la gravedad implica la resiliencia del SNC en la progresión de la esclerosis múltiple
Nature
|June 28, 2023
Resumen
Los factores genéticos influyen en la progresión de la esclerosis múltiple (EM). Una variante genética específica acorta significativamente el tiempo para necesitar una ayuda para caminar y aumenta la patología cerebral en pacientes con EM.
Área de la Ciencia:
- La neurociencia
- La genética
- Inmunología
Sus antecedentes:
- La esclerosis múltiple (EM) es una enfermedad autoinmune del sistema nervioso central (SNC) que causa neurodegeneración y discapacidad.
- Afecta comúnmente a adultos jóvenes, lo que lleva a un deterioro neurológico crónico.
Objetivo del estudio:
- Investigar los mecanismos genéticos que influyen en la progresión de la enfermedad de la esclerosis múltiple.
- Identificar las asociaciones genéticas con la puntuación de gravedad de la EM relacionada con la edad.
Principales métodos:
- Estudio de asociación genómica (GWAS) en 12.584 casos de EM, con replicación en 9.805 casos.
- Análisis de la puntuación de gravedad de la EM relacionada con la edad.
- Los análisis de aleatorización mendeliana.
Principales resultados:
- Se encontró una asociación significativa con rs10191329 en el locus DYSF-ZNF638, donde el alelo de riesgo acorta el tiempo para requerir una ayuda para caminar en 3,7 años y aumenta la patología del SNC.
- Sugestiva asociación con rs149097173 en el locus DNM3-PIGC.
- Se observó un enriquecimiento de la heredabilidad en los tejidos del SNC.
- La aleatorización mendeliana sugirió un efecto protector del logro educativo más alto.
Conclusiones:
- Los factores genéticos, particularmente dentro del locus DYSF-ZNF638, juegan un papel crucial en la progresión y gravedad de la EM.
- La resiliencia del SNC y la reserva neurocognitiva, en lugar de solo los factores inmunológicos, pueden determinar los resultados de la EM.
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