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Abel Belachew1, Sarah Biber2, Walter W Kukull2

  • 1Vanderbilt Memory & Alzheimer's Center, Vanderbilt University Medical Center, Nashville, TN, USA.

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|December 24, 2025
PubMed
Resumen
Este resumen es generado por máquina.

El sexo y el genotipo APOE modifican significativamente la relación entre el volumen del hipocampo y el rendimiento de la memoria en personas mayores. Estos factores son cruciales para comprender la progresión de la enfermedad de Alzheimer y el deterioro cognitivo.

Palabras clave:
hipocampomemoriaenvejecimientoenfermedad de Alzheimergenotipo APOEsexo

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Área de la Ciencia:

  • Neurociencia
  • Genética
  • Gerontología

Sus antecedentes:

  • El hipocampo es fundamental para la memoria y se ve afectado tempranamente en la enfermedad de Alzheimer (AD).
  • Los alelos APOE-ε4 y APOE-ε2 influyen en el riesgo de AD y el deterioro cognitivo.
  • Comprender cómo los factores genéticos y demográficos modifican las relaciones cerebro-memoria es vital para la investigación de la AD.

Objetivo del estudio:

  • Investigar los efectos modificadores del genotipo APOE en la asociación entre el volumen del hipocampo y la memoria.
  • Examinar la influencia del sexo, la raza y el diagnóstico clínico en esta asociación.

Principales métodos:

  • Se utilizaron datos de 6.895 participantes de cuatro cohortes de envejecimiento y AD.
  • Se empleó aprendizaje profundo para el análisis del volumen del hipocampo por RM y modelado de variables latentes para la armonización de puntuaciones de memoria.
  • Se aplicaron modelos de regresión lineal y de efectos mixtos para evaluar las interacciones en la memoria basal y las trayectorias longitudinales.

Principales resultados:

  • La asociación del volumen del hipocampo con la memoria es más fuerte en mujeres que en hombres.
  • Los portadores de APOE-ε4 mostraron una asociación más fuerte, mientras que los portadores de APOE-ε2 mostraron una asociación atenuada, particularmente en el deterioro cognitivo leve.
  • Interacción significativa de tres vías entre APOE-ε2, diagnóstico de AD y volumen del hipocampo en la memoria, especialmente en pacientes con AD.

Conclusiones:

  • El sexo y el genotipo APOE modifican significativamente el vínculo entre el volumen del hipocampo y el rendimiento de la memoria.
  • Los efectos más pronunciados se observaron en portadores de APOE-ε4, mujeres e individuos con AD.
  • Destaca la necesidad de integrar factores genéticos, clínicos y demográficos en la investigación y la práctica clínica de la AD.