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Updated: Jan 7, 2026

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Ciencia básica y patogénesis

Glori Das1, Raksha Raghunathan1, Lin Wang1

  • 1Houston Methodist Research Institute, Houston, TX, USA.

Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 24, 2025
PubMed
Resumen

La patología de la enfermedad de Alzheimer (EA) en la retina implica cambios en las células gliales de Müller (MGC) y una depuración glinfática alterada. Los cambios retinianos tempranos en las MGC y las alteraciones en la retina periférica pueden servir como biomarcadores de la EA.

Palabras clave:
células gliales de Müllerdepuración glinfáticabeta-amiloideretinaenfermedad de Alzheimerbiomarcadores

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Área de la Ciencia:

  • Neurociencia; Oftalmología; Patología

Sus antecedentes:

  • Los depósitos de beta-amiloide (Aβ) en la retina se correlacionan con el Aβ cerebral en la enfermedad de Alzheimer (EA). La depuración glinfática alterada se asocia con la acumulación de Aβ en el cerebro de la EA. Las alteraciones de las células gliales de Müller (MGC) pueden empeorar la patología de Aβ en la retina.

Objetivo del estudio:

  • Investigar si los déficits en la depuración glinfática del nervio óptico y las alteraciones de las MGC contribuyen a la acumulación de Aβ en la retina. Examinar las diferencias fenotípicas de las MGC y las tasas de depuración glinfática del nervio óptico en modelos de ratón de EA.

Principales métodos:

  • Se compararon ratones 5xFAD (modelo de EA) y ratones de tipo salvaje. Se cuantificó la expresión de MGC de GFAP (gliosis) y AQP4 (conductor glinfático) mediante inmunofluorescencia. Se evaluó el transporte glinfático anterógrado mediante inyecciones intravítreas de Aβ40 y cadaverina fluorescentes.

Principales resultados:

  • La AQP4 se sobreexpresó en las retinas de 5xFAD, con una localización perivascular y del neuropilo mejorada. La elevación de GFAP en la retina periférica de ratones 5xFAD sugiere gliosis reactiva. Se observó un transporte glinfático anterógrado mantenido de trazadores a través del nervio óptico.

Conclusiones:

  • Los cambios en la biología de las MGC ocurren tempranamente en la EA, potencialmente antes de los síntomas. La retina periférica es una región clave y poco explorada para la patología de la EA y biomarcadores potenciales. Se necesita más investigación para comprender la interacción entre la producción/depuración de Aβ para el diagnóstico y la terapéutica.