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Ciencia básica y patogénesis

Sonal Kumar1,2, Annat Haber3, Catrina Spruce2

  • 1Tufts University Graduate School of Biomedical Sciences, Boston, MA, USA.

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

Los factores genéticos, no solo la edad, influyen en los biomarcadores de la enfermedad de Alzheimer (EA) en titíes. Este estudio identifica contribuciones genéticas potenciales a la neurodegeneración, ofreciendo información sobre la genética de la EA humana.

Palabras clave:
enfermedad de Alzheimergenéticatitíbiomarcadoresneurodegeneraciónmodelos animalesprimate no humanosecuenciación del genoma completotaubeta-amiloideneurofilamentospresenilina-1

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Área de la Ciencia:

  • Neurociencia; Genética; Modelos de primates

Sus antecedentes:

  • La enfermedad de Alzheimer (EA) es un trastorno neurodegenerativo complejo influenciado por factores genéticos y ambientales.
  • Los estudios genómicos han identificado variantes asociadas con la EA, pero el riesgo poligénico en evolución a lo largo del tiempo sigue sin estar claro.
  • Los titíes comunes ofrecen un valioso modelo de primate no humano para estudiar la neurodegeneración relacionada con la edad y la patología de la EA.

Objetivo del estudio:

  • Investigar las asociaciones genéticas con biomarcadores plasmáticos relacionados con la enfermedad de Alzheimer en una cohorte de titíes comunes.
  • Explorar la interacción entre la edad, el sexo y los factores genéticos en la variación de los biomarcadores de la EA.
  • Identificar posibles loci genéticos que contribuyen a la neurodegeneración en un modelo de primate no humano.

Principales métodos:

  • Secuenciación del genoma completo de más de 100 titíes (portadores de tipo salvaje y mutantes de PSEN1).
  • Medición de biomarcadores plasmáticos asociados con la EA (tau total, NfL, GFAP, péptidos beta-amiloides).
  • Análisis de modelo lineal mixto para evaluar las asociaciones genéticas con fenotipos individuales y compuestos, ajustando por parentesco y sexo.

Principales resultados:

  • Las hembras exhibieron correlaciones más fuertes entre los biomarcadores de neurodegeneración (tTau, NfL, GFAP) y los péptidos beta-amiloides en comparación con los machos.
  • Se observó una correlación positiva significativa entre NfL y la edad exclusivamente en titíes machos.
  • Los escaneos genómicos identificaron numerosos polimorfismos de nucleótido único (SNP) significativos y sugerentes asociados con los biomarcadores de la EA.

Conclusiones:

  • La edad por sí sola no explica completamente las variaciones en los biomarcadores relevantes para la EA en titíes, lo que indica una influencia genética sustancial.
  • Las asociaciones hereditarias descubiertas en titíes pueden proporcionar información genética valiosa sobre la progresión y biología de la EA humana.
  • Se justifica una mayor investigación sobre los impactos funcionales de los loci genéticos identificados.