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Ciencia básica y patogénesis

Allison Snyder1, EunRan R Suh2, Laynie Dratch1

  • 1Penn Frontotemporal Degeneration Center, Department of Neurology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.

Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 25, 2025
PubMed
Resumen

La demencia frontotemporal de variante conductual (vFTD conductual) muestra una diversidad genética y neuropatológica significativa. Este estudio revela una alta prevalencia de co-patología, particularmente cambios neuropatológicos de la enfermedad de Alzheimer (ADNC), en casos de vFTD conductual.

Palabras clave:
demencia frontotemporal de variante conductualgenéticaneuropatologíaco-patologíaenfermedad de Alzheimerdemencia frontotemporalFTLD-TDPFTLD-Tauproteínas tauproteínas tauproteínas tau

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Área de la Ciencia:

  • Neurociencia
  • Genética
  • Patología

Sus antecedentes:

  • La demencia frontotemporal de variante conductual (vFTD conductual) es una presentación común de FTD con diversas causas subyacentes.
  • Comprender el panorama genético y patológico de la vFTD conductual es crucial para el diagnóstico y el tratamiento.

Objetivo del estudio:

  • Investigar las características genéticas y neuropatológicas de una gran cohorte de vFTD conductual.
  • Identificar patrones de riesgo familiar y co-patologías en la vFTD conductual.

Principales métodos:

  • Se caracterizaron 410 casos de vFTD conductual utilizando los criterios de Rascovsky, excluyendo otros tipos de demencia.
  • Se evaluó el riesgo familiar a través de pedigríes y se realizó un análisis de la carga genética.
  • Se examinaron las características neuropatológicas en 88 casos, incluyendo FTLD-TDP, FTLD-Tau y co-patologías como ADNC.

Principales resultados:

  • Identificó 107 casos monogénicos, lo que sugiere una mayor carga familiar de la que se pensaba anteriormente.
  • Se encontró FTLD-TDP en el 59,1% y FTLD-Tau en el 39,8% de los casos examinados neuropatológicamente.
  • Se observaron altas tasas de co-patología, con ADNC presente en el 50% de los casos de FTLD-TDP y en el 37% de los casos de FTLD-Tau.

Conclusiones:

  • La vFTD conductual presenta un enriquecimiento genético significativo y altas tasas de co-patología, especialmente ADNC.
  • Los hallazgos sobre la co-patología ADNC tienen implicaciones para las terapias emergentes modificadoras de la enfermedad.
  • Se necesita un análisis adicional de la carga genética para identificar variantes raras que contribuyen a la vFTD conductual.