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Yun Ju Ju Sung1, Anh Do2, Soomin Song2

  • 1Washington University School of Medicine, Saint Louis, MO, USA.

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|December 25, 2025
PubMed
Resumen
Este resumen es generado por máquina.

Este estudio revela la regulación genética específica del sexo de las proteínas del líquido cefalorraquídeo (LCR), descubriendo patrones distintos en hombres y mujeres. Estos hallazgos ofrecen nuevas perspectivas sobre las bases biológicas de las diferencias sexuales en enfermedades neurodegenerativas como el Alzheimer y el Parkinson.

Palabras clave:
proteómicaneurogenéticaproteomaenfermedades neurodegenerativasdiferencias sexualesregulación genéticalíquido cefalorraquídeo

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Área de la Ciencia:

  • Neurogenética
  • Proteómica
  • Diferencias basadas en el sexo en la enfermedad

Sus antecedentes:

  • Las diferencias sexuales son evidentes en las enfermedades de Alzheimer (AD) y Parkinson (PD).
  • Las regulaciones genéticas para los fenotipos de AD y PD muestran variaciones específicas del sexo.
  • Las regulaciones proteicas específicas del sexo, cruciales para las vías fisiológicas y los objetivos farmacológicos, están subestudiadas.

Objetivo del estudio:

  • Investigar la regulación genética específica del sexo del proteoma en el líquido cefalorraquídeo (LCR).
  • Identificar pQTL (quantitative trait loci de proteínas) específicos del sexo en el proteoma del LCR.
  • Explorar la asociación de pQTL específicos del sexo con loci de riesgo de AD y PD.

Principales métodos:

  • Se realizó un análisis pQTL estratificado por sexo en más de 6000 proteínas utilizando datos de SomaScan7K de 1.640 hombres y 1.713 mujeres.
  • Se utilizaron aproximadamente 13 millones de variantes autosómicas imputadas de TOPMED.
  • Se examinaron los umbrales de significancia de pQTL de p < 5x10^-8 (cis) y p < 3.45x10^-11 (trans), y se evaluó la relevancia para AD y PD a través de estudios de colocalización y asociación por proteína (PWAS).

Principales resultados:

  • Se identificaron 1.684 pQTL significativos para 1.488 proteínas en 811 loci genéticos.
  • Se descubrieron 384 pQTL (22,8%) únicos en un sexo: 215 en hombres y 169 en mujeres.
  • Se encontró una regulación específica del sexo de loci relevantes para AD y PD, incluida la región APOE de proteínas en AD y loci LRRK2 de proteínas en PD, con proteínas específicas (p. ej., ACE, TMEM106B) colocalizando con loci de riesgo de enfermedad de manera dependiente del sexo.

Conclusiones:

  • Se descubrió una regulación genética específica del sexo distinta del proteoma del LCR a través de un análisis pQTL estratificado por sexo.
  • Los hallazgos complementan los datos eQTL existentes conscientes del sexo, proporcionando una visión más completa de la regulación genética.
  • Ofrece información sobre los mecanismos biológicos que subyacen a las diferencias sexuales en la neurodegeneración.