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Ciencia Básica y Patogénesis
Isabel Castanho1,2, Pourya Naderi Yeganeh1,2, Carles A Boix3
1Beth Israel Deaconess Medical Center, Boston, MA, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 23, 2025
Resumen
La resiliencia cognitiva en la enfermedad de Alzheimer (EA) implica cambios moleculares y celulares específicos, particularmente en las vías neuronales. La comprensión de estos mecanismos protectores ofrece nuevas dianas terapéuticas para la EA.
Área de la Ciencia:
- Neurociencia; Genética; Biología Molecular
Sus antecedentes:
- La resiliencia cognitiva es la capacidad de mantener la función cognitiva a pesar de la patología de la enfermedad de Alzheimer (EA).; El estudio de la resiliencia revela mecanismos protectores naturales y estrategias terapéuticas potenciales para la EA.; Esta investigación integra datos genéticos, transcriptómicos y celulares para explorar la resiliencia cognitiva.
Objetivo del estudio:
- Investigar la base molecular y celular de la resiliencia cognitiva en el contexto de la enfermedad de Alzheimer.; Identificar firmas genéticas y transcriptómicas asociadas con la resiliencia cognitiva.; Mapear subtipos neuronales y vías involucradas en la protección contra la patología de la EA.
Principales métodos:
- Se utilizaron datos de secuenciación de ARN a granel y de núcleo único de la cohorte ROSMAP (n=679).; Se clasificó a los sujetos en grupos de EA, resilientes y de control según el estado cognitivo y la neuropatología.; Se realizaron análisis genéticos, transcriptómicos y de poblaciones celulares para identificar marcadores y vías de resiliencia.
Principales resultados:
- La resiliencia cognitiva se correlacionó con un puntaje de riesgo poligénico de EA intermedio y cambios específicos en la expresión génica (p. ej., aumento de GFAP, disminución de KLF4).; Las neuronas excitadoras en individuos resilientes mostraron vías de plegamiento y degradación de proteínas reorganizadas.; Subpoblaciones neuronales resilientes distintas en la corteza entorrinal utilizaron señalización de neurotrofinas y angiopoyetina; se identificaron RBFOX1 y KIF26B como marcadores potenciales.
Conclusiones:
- La resiliencia cognitiva se caracteriza por características celulares y moleculares específicas, incluido el papel de las neuronas excitadoras e inhibitorias.; El estudio destaca la importancia de mantener el equilibrio excitador-inhibidor, que a menudo se altera en la EA.; Los hallazgos proporcionan una base para el desarrollo de terapias dirigidas para la EA aprovechando los mecanismos de resiliencia natural.
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