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Escalando la neurogénesis del cerebro a través de la evolución

Brigitte Malgrange1, Laurent Nguyen1

  • 1GIGA-Stem Cells and GIGA-Neurosciences, Interdisciplinary Cluster for Applied Genoproteomics (GIGA-R), University of Liège, Liège, Belgium.

Science (New York, N.Y.)
|September 8, 2022
PubMed
Resumen
Este resumen es generado por máquina.

Una alteración genética específica puede ser responsable de la neurogénesis cortical elevada observada en los humanos modernos, lo que contribuye a las diferencias en el desarrollo del cerebro.

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Área de la Ciencia:

  • Biología evolutiva
  • La neurociencia
  • Genética humana

Sus antecedentes:

  • La neurogénesis cortical, la formación de nuevas neuronas en la corteza cerebral, es crucial para las capacidades cognitivas.
  • Los humanos modernos exhiben un desarrollo cortical distinto en comparación con los homínidos ancestrales.

Objetivo del estudio:

  • Investigar posibles fundamentos genéticos para el aumento de la neurogénesis cortical en humanos modernos.
  • Para identificar cambios genéticos específicos asociados con un mejor desarrollo cerebral.

Principales métodos:

  • Análisis comparativo de genómica entre los humanos modernos y los homínidos arcaicos.
  • Modelado en silicio de la función génica relacionada con la neurogénesis.

Principales resultados:

  • Se identificó una variante genética específica que está altamente conservada en los humanos modernos, pero ausente en los homínidos arcaicos.
  • Esta variante está vinculada a elementos reguladores que influyen en los genes críticos para el desarrollo cortical.

Conclusiones:

  • Un cambio genético clave probablemente jugó un papel importante en la evolución del aumento de la neurogénesis cortical en el linaje humano.
  • Este hallazgo ofrece una visión de la base genética de la singularidad cognitiva humana.