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Updated: Jan 8, 2026

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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
Claudia Rangel-Barajas1,2, Abigail Perkins1, Dalia Elkhatib1
1Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, IN, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 24, 2025
Resumen
Alzheimer
Área de la Ciencia:
- Neurociencia; Genética; Biología Molecular
Sus antecedentes:
- La enfermedad de Alzheimer (AD) es un trastorno neurodegenerativo caracterizado por el deterioro cognitivo y la degeneración sináptica.
- La pérdida sináptica es un indicador clave del deterioro cognitivo en la AD, que puede preceder a la formación de placas amiloides.
- La investigación de la integridad sináptica en modelos de ratones genéticamente modificados es crucial para comprender la patogénesis de la AD.
Objetivo del estudio:
- Evaluar la integridad sináptica y los perfiles transcriptómicos en ratones LOAD2, un modelo que porta factores de riesgo genético humanizados para la enfermedad de Alzheimer de inicio tardío (LOAD).
- Identificar alteraciones dependientes de la edad en proteínas sinápticas y expresión génica relevantes para la patología de la AD.
- Evaluar la utilidad del modelo de ratón LOAD2 para estudiar la progresión de la LOAD.
Principales métodos:
- Aislamiento de fracciones subcelulares de cerebros de ratones LOAD2 para analizar componentes sinápticos y extrasinápticos.
- Análisis de Western blot para evaluar la expresión de proteínas de estructura y función sináptica en diferentes edades.
- Hibridación de ácidos nucleicos multiplex Nanostring para el perfilado genético integral para detectar cambios en la expresión.
Principales resultados:
- Los ratones LOAD2 exhibieron cambios significativos dependientes de la edad en las proteínas presinápticas SV2A y bassoon.
- Se observaron alteraciones en la composición de la subunidad del receptor NMDA y AMPA en los sitios postsinápticos.
- La neurogranina, un marcador disminuido en el LCR de pacientes con AD, se redujo significativamente en los ratones LOAD2.
Conclusiones:
- El modelo de ratón LOAD2, desarrollado con factores de riesgo genético humanizados, muestra alteraciones en las proteínas sinápticas que reflejan la patología de la AD humana.
- Estos hallazgos validan el modelo LOAD2 para el estudio de los cambios sinápticos en la enfermedad de Alzheimer de inicio tardío.
- La integridad sináptica y las firmas moleculares en los ratones LOAD2 se asemejan estrechamente a las observadas en la AD humana.
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