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La CDKL5 modula la plasticidad de las sinapsis excitatorias a través de la separación de fases líquido-líquido

Mingjie Li^1,2, Ziai Zhu^1,2, Dan Li¹

¹Institute of Neuroscience, Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai 200031, China.

Proceedings of the National Academy of Sciences of the United States of America

|February 18, 2026

Resumen

La quinasa similar a la ciclina-dependiente 5 (CDKL5) regula la plasticidad sináptica a través de la separación de fases líquido-líquido (LLPS) con PSD95. Este mecanismo es crucial para la ampliación de las espinas dendríticas y está alterado en el trastorno por deficiencia de CDKL5 (CDD).

Área de la Ciencia:

Neurociencia
Biología Molecular
Plasticidad Sináptica

Sus antecedentes:

La remodelación sináptica es vital para la plasticidad de los circuitos neuronales.
La densidad postsináptica (PSD) organiza los componentes sinápticos.
Los mecanismos moleculares de la remodelación sináptica no se comprenden completamente.

Objetivo del estudio:

Identificar nuevos reguladores de la plasticidad estructural en las sinapsis excitatorias.
Investigar el papel de la quinasa similar a la ciclina-dependiente 5 (CDKL5) en la remodelación sináptica.
Elucidar los mecanismos moleculares subyacentes a la función de CDKL5 y al trastorno por deficiencia de CDKL5 (CDD).

Principales métodos:

Experimentos in vitro y con neuronas cultivadas.
Análisis de la separación de fases líquido-líquido (LLPS) de CDKL5.
Co-inmunoprecipitación y microscopía para estudiar las interacciones y la localización de proteínas.

Principales resultados:

La CDKL5 regula la plasticidad estructural en las sinapsis excitatorias.
La CDKL5 experimenta LLPS, formando cocondensados con PSD95.
La LLPS de CDKL5 facilita el reclutamiento sináptico de Kalirin7, promoviendo la ampliación de las espinas dendríticas.
Las mutaciones patogénicas de CDKL5 alteran la LLPS, vinculando los defectos de separación de fases con la patogénesis de la CDD.

Conclusiones:

La CDKL5 es un regulador crítico de la plasticidad sináptica a través de LLPS.
LLPS es un mecanismo clave para la CDKL5 en la organización de la arquitectura PSD durante la remodelación sináptica.
Los defectos en la LLPS mediada por CDKL5 contribuyen a la patogénesis de la CDD.

Palabras clave:

CDKL5 espina dendrítica separación de fases líquido-líquido densidad postsináptica plasticidad sináptica

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