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Jessica Wu1, Rebecca Sebastian1, Robert Kupp2

  • 1AbbVie, Cambridge, MA, USA.

Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 24, 2025
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Resumen
Este resumen es generado por máquina.

Los investigadores desarrollaron un nuevo receptor de anticuerpos quiméricos sinápticos (synCAR) para dirigirse a especies de tau patógenas en la enfermedad de Alzheimer (EA). Este enfoque concentra las semillas de tau en la sinapsis, lo que podría prevenir la propagación y progresión de la enfermedad.

Palabras clave:
proteína tauenfermedad de Alzheimerterapiasanticuerpossinapsis

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Área de la Ciencia:

  • Neurociencia
  • Biología Molecular
  • Inmunoterapia

Sus antecedentes:

  • La transmisión transsináptica de tau impulsa la patología de la enfermedad de Alzheimer (EA).
  • Las inmunoterapias actuales tienen dificultades para dirigirse a las especies de tau dentro de la hendidura sináptica.
  • Las limitaciones incluyen la selectividad de los anticuerpos, la disponibilidad en el SNC y el acceso sináptico.

Objetivo del estudio:

  • Desarrollar una nueva estrategia para dirigirse a especies de tau patógenas en la sinapsis.
  • Superar las limitaciones de las inmunoterapias existentes para la EA.

Principales métodos:

  • Se purificaron sinaptosomas de pacientes con EA y controles.
  • Se utilizó la fosfoproteómica para identificar epítopos de tau en terminales postsinápticos.
  • Se desarrolló un receptor de anticuerpos quiméricos sinápticos (synCAR) fusionando el scFv PHF1 con la neuroligina-1 (NLGN1) y se administró mediante AAV9.

Principales resultados:

  • Se identificaron 17 epítopos de fosfo-tau enriquecidos en fracciones postsinápticas de pacientes con EA, incluido PHF1 (pS396/pS404).
  • El synCAR PHF1 se expresó eficazmente en la membrana sináptica en modelos neuronales murinos y de hiPSC sin afectar la viabilidad.
  • La focalización de tau patógena por el synCAR PHF1 aumentó la agregación de tau en neuronas sembradas en aproximadamente un 73%, lo que indica la captura y concentración de semillas de tau.

Conclusiones:

  • El estudio presenta un nuevo mecanismo para dirigirse a proteínas dentro de la hendidura sináptica o la membrana postsináptica.
  • El synCAR PHF1 ofrece un enfoque eficaz para aislar e identificar especies de tau en propagación.
  • Esta estrategia tiene potencial para el desarrollo de nuevas terapias para la EA.