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Ciencia básica y patogénesis
Katelynn E Krick1, Joshua Lykins2, Hsin-Pei Wang3
1Indiana University School of Medicine, Stark Neurosciences Research Institute, Department of Anatomy, Cell Biology, and Physiology, Indianapolis, IN, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 25, 2025
Resumen
La inhibición del TNFα soluble (sTNFα) con inmunoterapia anti-amiloide beta (Aß) redujo la inflamación y las microhemorragias en un modelo de Alzheimer.
Área de la Ciencia:
- Neurociencia
- Inmunología
- Farmacología
Sus antecedentes:
- Los tratamientos para la enfermedad de Alzheimer (EA) incluyen inmunoterapias anti-amiloide beta (Aß).
- Estas terapias pueden causar Anomalías de Imagen Relacionadas con Amiloide (ARIA), como edema cerebral (ARIA-E) o hemorragias (ARIA-H).
- La neuroinflamación, particularmente en la unidad neurovascular, está implicada en el desarrollo de ARIA.
Objetivo del estudio:
- Investigar si la inhibición del TNFα soluble (sTNFα) junto con la inmunoterapia anti-Aß puede reducir la inflamación sistémica y la ARIA-H.
- Probar la hipótesis de que la combinación de la inhibición de sTNFα con la inmunoterapia anti-Aß mitiga la ARIA-H.
Principales métodos:
- Se utilizaron ratones APP-knockin de edad avanzada tratados con un anticuerpo dirigido a Aß (3D6) y un inhibidor de sTNFα o solución salina durante 3 meses.
- Se cuantificó la carga de amiloide mediante tinción de rojo Congo.
- Se evaluó la inflamación sistémica mediante la activación plaquetaria por citometría de flujo y la ocurrencia de microhemorragias mediante tinción de azul de Prusia.
Principales resultados:
- El tratamiento con 3D6 aumentó el sangrado en la corteza y el hipocampo en comparación con los controles.
- La inhibición de sTNFα redujo significativamente las hemorragias inducidas por 3D6 en el hipocampo.
- La inhibición de sTNFα también previno el aumento de la activación plaquetaria observado en ratones tratados con 3D6.
Conclusiones:
- La inhibición de sTNFα muestra ser prometedora como terapia adyuvante a los anticuerpos anti-Aß.
- Esta combinación puede reducir la inflamación sistémica y el desarrollo de microhemorragias (ARIA-H).
- Se justifica una mayor investigación sobre sTNFα como objetivo terapéutico para ARIA-H.
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