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Mouse Footpad Inoculation Model to Study Viral-Induced Neuroinflammatory Responses
Published on: June 14, 2020
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Ciencia básica y patogénesis
Matthew Mandrozos1,2, Tina Beckett2, Mary Hill2
1University of Toronto, Toronto, ON, Canada.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 25, 2025
Resumen
Este estudio desarrolló un nuevo modelo de rata para la variante de Alzheimer con cuerpos de Lewy (LBV-AD) inyectando alfa-sinucleína en el cerebro. El modelo replicó con éxito las patologías clave de LBV-AD, mostrando un aumento de los agregados de alfa-sinucleína con el tiempo.
Área de la Ciencia:
- Neurociencia; Patología; Modelos Animales
Sus antecedentes:
- La enfermedad de Alzheimer (EA) se caracteriza por patología de amiloide-beta y tau.; Las copatologías, como los cuerpos de Lewy (CL), comunes en la enfermedad de Parkinson, contribuyen a la heterogeneidad de la EA.; La variante de Alzheimer con cuerpos de Lewy (LBV-AD) muestra una progresión acelerada.
Objetivo del estudio:
- Caracterizar un nuevo modelo preclínico de rata para LBV-AD.; Recapitular los principales sellos distintivos patológicos de LBV-AD en un entorno preclínico.
Principales métodos:
- Inyección estereotáxica de virus adenoasociado (AAV) que transporta alfa-sinucleína humana (hSNCA o SYN119) en ratas F344TgAD y ratas no transgénicas.; Análisis a los 3, 5 y 9 meses posteriores a la inyección, incluida la histología para cuantificar la patología y los marcadores de neurodegeneración.
Principales resultados:
- Se observaron agregados de alfa-sinucleína en la amígdala y el estriado a los 3 meses posteriores a la inyección.; Se observó una tendencia de aumento de agregados en ratas transgénicas inicialmente.; Se encontró significativamente más patología de cuerpos de Lewy en ratas no transgénicas inyectadas con hSNCA a los 5 meses.
Conclusiones:
- Tanto hSNCA como SYN119 produjeron con éxito agregados de alfa-sinucleína en el cerebro de la rata.; Los niveles de agregados aumentaron con el tiempo, lo que respalda la utilidad del modelo para estudiar la progresión de LBV-AD.
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