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Manifestaciones Clínicas

Therese H Kim1, David L Sultzer2,3

  • 1UC Irvine Institute for Memory Impairments and Neurological Disorders (UCI MIND), Irvine, CA, USA.

Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 26, 2025
PubMed
Resumen
Este resumen es generado por máquina.

Este estudio encontró que, si bien la edad, el sexo y las puntuaciones cognitivas predicen el deterioro cognitivo en todos los individuos, los niveles de amiloide influyen en qué factores específicos, como las preocupaciones sobre la memoria o la baja energía, son los más predictivos. Comprender estas diferencias es clave para intervenciones específicas.

Palabras clave:
deterioro cognitivoamiloidepredictoresintervenciones dirigidasestado de la amiloide

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Área de la Ciencia:

  • Neurociencia
  • Gerontología
  • Biomarcadores

Sus antecedentes:

  • El deterioro cognitivo es una preocupación creciente en las poblaciones que envejecen.
  • La acumulación de amiloide en el cerebro es una característica de la enfermedad de Alzheimer.
  • Identificar los predictores del deterioro cognitivo es crucial para la intervención temprana.

Objetivo del estudio:

  • Examinar las asociaciones entre los factores de riesgo basales y el deterioro cognitivo futuro.
  • Determinar si los predictores del deterioro cognitivo difieren según el estado de la amiloide.

Principales métodos:

  • Análisis de 1133 participantes del estudio A4 con datos de seguimiento de 4,5 años.
  • Los modelos de regresión logística evaluaron predictores que incluyen edad, sexo, educación, genotipo APOE, SUVR de amiloide-β (Aβ), puntuaciones PACC, GDS y STAI.
  • Comparación de predictores de deterioro cognitivo (CDR>0) en grupos Aβ-positivos (Aβ+) y Aβ-negativos (Aβ-).

Principales resultados:

  • 282 participantes Aβ+ y 51 Aβ- desarrollaron deterioro cognitivo.
  • Predictores comunes: edad avanzada, sexo masculino, puntuaciones PACC bajas.
  • El SUVR de Aβ predijo fuertemente el deterioro en individuos Aβ+ (OR=15,34).
  • Las puntuaciones STAI también fueron significativas (OR=1,07).
  • En individuos Aβ-, las puntuaciones GDS predijeron el deterioro (OR=1,27), siendo la baja energía el síntoma más predictivo.
  • En individuos Aβ+, las preocupaciones sobre la memoria fueron el predictor más fuerte.

Conclusiones:

  • Los predictores del deterioro cognitivo varían según el estado de la amiloide.
  • Mecanismos distintos pueden subyacer al deterioro cognitivo en individuos Aβ+ versus Aβ-.
  • Las intervenciones dirigidas pueden requerir la consideración de la positividad individual a la amiloide.