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Updated: Jan 8, 2026

Mouse Footpad Inoculation Model to Study Viral-Induced Neuroinflammatory Responses
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Ciencia básica y patogénesis

Niels Reijner1,2,3, Danielle V Toen4, Betty M Tijms5

  • 1Amsterdam Neuroscience, Neurodegeneration, Amsterdam, Netherlands.

Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 23, 2025
PubMed
Resumen
Este resumen es generado por máquina.

La relación T1w/T2w de RM detecta eficazmente cambios microestructurales en cerebros con enfermedad de Alzheimer (EA), diferenciando la EA de los controles e incluso de los subtipos. Este marcador de imagen refleja la integridad cortical general más allá de la mielina.

Palabras clave:
enfermedad de AlzheimerRMbiomarcadorpatogénesisneuroimagen

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Área de la Ciencia:

  • Neuroimagen
  • Descubrimiento de biomarcadores
  • Investigación de la enfermedad de Alzheimer

Sus antecedentes:

  • Los cambios microestructurales cerebrales preceden al inicio de la enfermedad de Alzheimer (EA) y al deterioro cognitivo.
  • La detección temprana de estos cambios es crucial para comprender la progresión de la EA.
  • La relación de RM T1w/T2w muestra potencial como biomarcador, pero requiere una mayor validación.

Objetivo del estudio:

  • Investigar la relación entre la relación T1w/T2w y las medidas histológicas de los cambios microestructurales en la EA.
  • Aclarar el potencial de la relación T1w/T2w como biomarcador de neuroimagen para la EA y sus subtipos.

Principales métodos:

  • Se adquirieron escáneres de RM T1w/T2w post mortem in situ y ante mortem de donantes de cerebros con EA y controles.
  • Se procesaron los datos de RM para calcular las relaciones T1w/T2w estandarizadas utilizando SPM12 y el atlas Brainnetome.
  • Se realizó tinción inmunológica en el tejido cerebral para detectar mielina, daño neuroaxonal, microglía, hierro, Aβ y pTau, cuantificando la inmunoreactividad.

Principales resultados:

  • Los cerebros con EA post mortem exhibieron una disminución global de la relación T1w/T2w en comparación con los controles, siendo más pronunciada en el hipocampo y el parahipocampo.
  • La relación T1w/T2w fue menor en la EA típica en comparación con la EA atípica en las regiones (para)hipocampales.
  • Las relaciones T1w/T2w mostraron una fuerte correlación entre los escáneres post mortem y ante mortem y se asociaron con la mielina, la microglía, Aβ, pTau, el daño neuroaxonal y la densidad de hierro en cerebros con EA.

Conclusiones:

  • La relación T1w/T2w sirve como un indicador general de la integridad del tejido cortical en la EA, no limitado a la mielina.
  • La relación T1w/T2w puede distinguir los cerebros con EA de los controles y diferenciar entre subtipos de EA.
  • Este estudio mejora la comprensión y la aplicación potencial de la relación T1w/T2w en la investigación y los entornos clínicos de la EA.