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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
Quan Vo1, Dina Nacionales1, Kristi Biswas1
1University of Florida, Gainesville, FL, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 25, 2025
Resumen
La inflamación sistémica no aceleró la patología tau en un modelo de ratón de la enfermedad de Alzheimer (EA). Sin embargo, la sepsis afectó la esperanza de vida y los niveles de tau en el cerebro de manera diferente en ratones machos y hembras.
Área de la Ciencia:
- Neurociencia
- Inmunología
- Patología
Sus antecedentes:
- La inflamación es un factor clave en la neurodegeneración de la enfermedad de Alzheimer (EA).
- Estudios previos muestran que la inflamación intracerebral afecta la patología tau en modelos de EA.
- El impacto de la inflamación periférica crónica en la tau cerebral sigue sin estar claro.
Objetivo del estudio:
- Investigar si la inflamación periférica crónica altera la proteína tau residente en el cerebro.
- Examinar los efectos de la sepsis en la patología tau y las respuestas inmunitarias en ratones PS19.
Principales métodos:
- Inducción de sepsis intraabdominal y estrés crónico en ratones PS19 (transgénicos para la proteína tau mutante humana P301S).
- Recolección de tejidos cerebrales y esplénicos para inmunohistoquímica y citometría de flujo.
- Evaluación de la tau fosforilada (AT8) y las alteraciones de las células inmunitarias en cohortes de pródromos y supervivencia.
Principales resultados:
- La inflamación sistémica no aceleró la patología tau positiva para AT8 en ningún sexo.
- La sepsis alteró la distribución de las células inmunitarias, incluyendo una reducción de las células T CD8+ en las hembras y un aumento de las células supresoras derivadas de mieloides en ambos sexos.
- Se observaron diferencias específicas del sexo en la esperanza de vida y la carga de tau AT8 regional, y los ratones sépticos machos mostraron una menor carga de tau en el hipocampo.
Conclusiones:
- La inflamación sistémica puede influir en la esperanza de vida y la carga de tau regional en un modelo de ratón de la enfermedad de Alzheimer de manera dependiente del sexo.
- Se necesita más investigación para dilucidar los vínculos mecanicistas entre la inflamación sistémica y la patología tau tipo EA.
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