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Comentario sobre "La TKTL1 humana implica una mayor neurogénesis en el neocórtex frontal de los humanos modernos que

Roberto H Herai¹, Katerina Semendeferi², Alysson R Muotri³

¹Neurogenetics and Bioinformatics Laboratory, Experimental Multiuser Laboratory (LEM), Graduate Program in Health Sciences, School of Medicine and Life Sciences, Pontifícia Universidade Católica do Paraná, Curitiba, PR 80215-901, Brazil.

Science (New York, N.Y.)

|March 9, 2023

Resumen

La variante neandertal del gen TKTL1 se encuentra en los humanos modernos. Esto desafía la idea de que esta variante genética específica causa diferencias cerebrales entre los humanos y los neandertales.

Área de la Ciencia:

Biología evolutiva
Genética humana
La neurociencia

Sus antecedentes:

El gen TKTL1 está implicado en el desarrollo de neuronas corticales en humanos modernos.
Se ha propuesto una "variante neandertal presunta" específica de TKTL1 para explicar las diferencias cerebrales.

Objetivo del estudio:

Investigar la presencia de la "putativa variante neandertal" de TKTL1 en las poblaciones humanas modernas.
Desafiar la conclusión de que esta variante es la única responsable de distinguir los cerebros humanos modernos de los cerebros neandertales.

Principales métodos:

Análisis genético de las poblaciones humanas modernas.
La genómica comparada.

Principales resultados:

Se detectó la "variante neandertal presunta" de TKTL1 en los antecedentes genéticos humanos modernos.
La evidencia sugiere que esta variante no es exclusiva de los neandertales o la única responsable de las diferencias observadas en el cerebro.

Conclusiones:

La presencia de la variante neandertal TKTL1 en los humanos modernos refuta su papel como un diferenciador clave.
Las diferencias en la evolución del cerebro entre los humanos y los neandertales probablemente involucran factores genéticos más complejos más allá de esta única variante.

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