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Consorcio de Imagenología de Alzheimer

Cristiano Aguzzoli1,2,3, Guilherme Povala4, Pamela C L Ferreira4

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Resumen
Este resumen es generado por máquina.

La patología tau se relaciona con alteraciones motoras en la enfermedad de Alzheimer (EA), pero no con la irritabilidad. Esta investigación aclara el papel de tau en los síntomas neuropsiquiátricos (SN) a lo largo del continuo de la EA, guiando futuros tratamientos de la EA.

Palabras clave:
Enfermedad de AlzheimerPatología tauSíntomas neuropsiquiátricosAlteraciones motorasIrritabilidadNeuroimagenContinuo de la EA

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Área de la Ciencia:

  • Neurociencia
  • Neurología
  • Biomarcadores

Sus antecedentes:

  • Investigaciones previas indican una relación entre la patología tau y los síntomas neuropsiquiátricos (SN) en la enfermedad de Alzheimer (EA).
  • La influencia específica de tau en los dominios individuales de SN a lo largo del continuo de la EA sigue sin comprenderse completamente.
  • Este estudio investiga la asociación entre biomarcadores de tau y dominios específicos de SN en personas a lo largo del espectro de la EA.

Objetivo del estudio:

  • Investigar la asociación entre la patología tau y los dominios específicos de síntomas neuropsiquiátricos (SN) en el continuo de la enfermedad de Alzheimer (EA).
  • Probar la hipótesis de que la patología tau afecta desproporcionadamente a los síntomas hiperactivos y psicóticos en comparación con otros dominios de SN.
  • Diferenciar el impacto de tau en varios dominios de SN, incluidas las alteraciones motoras y la irritabilidad.

Principales métodos:

  • Se evaluó a 385 personas (sin deterioro cognitivo, MCI, demencia por EA) utilizando el Cuestionario de Neuropsiquiatría (NPI-Q) y la imagenología tau-PET ([18F]MK6240).
  • Se utilizaron modelos de regresión voxel a voxel y censurados, controlando la edad, el sexo y el estado cognitivo, para analizar la asociación entre los dominios de SN y el SUVR de tau.
  • Se empleó un enfoque de eliminación de un solo elemento para identificar los dominios clave de SN que contribuyen a las asociaciones observadas con la patología tau.

Principales resultados:

  • Las personas con deterioro cognitivo mostraron puntuaciones más altas en el NPI-Q y SUVR de tau-PET en comparación con las personas sin deterioro cognitivo.
  • El SUVR de tau-PET se asoció significativamente con los SN, particularmente en las regiones fronto-parietales, siendo las alteraciones motoras el factor más importante en todas las etapas de Braak.
  • La irritabilidad mostró una asociación negativa, lo que sugiere que la patología tau no está asociada con su desarrollo, mientras que las alteraciones motoras están altamente asociadas.

Conclusiones:

  • La patología tau se asocia con el desarrollo de alteraciones motoras pero no de irritabilidad en el continuo de la enfermedad de Alzheimer.
  • Estos hallazgos resaltan el papel específico de tau en ciertos SN, diferenciando su impacto en los síntomas motores frente a la irritabilidad.
  • Los resultados respaldan el desarrollo de terapéuticas dirigidas para mitigar las alteraciones motoras y la irritabilidad en pacientes con EA.