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¿El envejecimiento es un evento retrospectivo?

Nirmalya Dasgupta1, Peter D Adams1

  • 1Tumor Initiation and Maintenance Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, USA.

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|January 20, 2023
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Resumen
Este resumen es generado por máquina.

La reactivación de los retrovirus endógenos (ERV) en la vejez puede desencadenar la senescencia celular. Este proceso, vinculado a cambios epigenéticos, contribuye a la inflamación crónica asociada con el envejecimiento.

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Área de la Ciencia:

  • Biología molecular
  • Investigación sobre el envejecimiento
  • Inmunología

Sus antecedentes:

  • Los retrovirus endógenos (ERV) son restos de antiguas infecciones virales integradas en los genomas del huésped.
  • La reactivación de ERV se ha observado en varios estados de la enfermedad, lo que sugiere un papel en la patología.
  • Los mecanismos específicos que vinculan la actividad de los ERV con los procesos de envejecimiento aún no se comprenden por completo.

Objetivo del estudio:

  • Investigar el papel de la reactivación endógena del retrovirus en el proceso de envejecimiento.
  • Para determinar si la reactivación de ERV contribuye a la senescencia celular y la inflamación crónica.
  • Elucidar los mecanismos epigenéticos subyacentes a la reactivación del ERV en individuos de edad avanzada.

Principales métodos:

  • Análisis de los patrones de expresión de ERV en tejidos envejecidos.
  • Perfiles epigenéticos para evaluar las regiones reguladoras de ERV.
  • Inducción de modelos de senescencia para estudiar la participación del ERV.
  • Evaluación de los marcadores inflamatorios en relación con la actividad del ERV.

Principales resultados:

  • Liu y otros. demostrarán que la reactivación de ERV se produce en la vejez.
  • La reactivación de ERV está asociada con la derepresión epigenética de los loci de ERV.
  • Se encontró que los ERV reactivados inducen la senescencia celular.
  • Aumento de la actividad ERV correlacionado con la inflamación crónica asociada a la edad.

Conclusiones:

  • La reactivación endógena del retrovirus es una característica del envejecimiento.
  • La desregulación epigenética de los ERV contribuye a la inducción de la senescencia.
  • La reactivación de ERV exacerba la inflamación crónica asociada a la edad, afectando la salud.