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La fosforilación de CHK1 inducida por la angiotensina II en la serina-280 impulsa la remodelación cardíaca mediante
Zheng Xu1,2, Yihan Shen2, Xiaoting Luo3
1Heart Center, Department of Cardiovascular Medicine, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, Hangzhou, China.
British journal of pharmacology
|August 24, 2025
Resumen
La activación de la quinasa del punto de control 1 (CHK1) en los cardiomiocitos impulsa la remodelación cardíaca a través de la vía JAK1-STAT3. La inhibición de CHK1 ofrece una terapia potencial para la insuficiencia cardíaca.
Área de la Ciencia:
- Biología cardiovascular
- Cardiología molecular
- Señalización celular
Sus antecedentes:
- La remodelación cardíaca es un factor importante en la enfermedad cardíaca.
- La quinasa del punto de control 1 (CHK1) es crucial en la respuesta al daño del ADN, pero su papel en la remodelación cardíaca es desconocido.
- La angiotensina II se utiliza para modelar la remodelación cardíaca.
Objetivo del estudio:
- Investigar la activación de CHK1 en la remodelación cardíaca.
- Determinar el papel de CHK1 y las vías descendentes en la remodelación cardíaca inducida por la angiotensina II.
- Evaluar la inhibición de CHK1 como estrategia terapéutica.
Principales métodos:
- Espectrometría de masas y coinmunoprecipitación (Co-IP/MS) para la identificación de sustratos de CHK1.
- Estudios in vitro (cardiomiocitos neonatales en ratas) y in vivo (modelos en ratones).
- Inhibición farmacológica con el inhibidor de CHK1 CCT245737 y el inhibidor de JAK1 upadacitinib.
Principales resultados:
- La angiotensina II fosforila selectivamente la CHK1 en el S280 en los cardiomiocitos.
- La inhibición de CHK1 suprimió la hipertrofia de los cardiomiocitos inducida por la angiotensina II.
- JAK1 fue identificado como un sustrato de CHK1, mediando la activación de la señalización JAK1-STAT3.
- La inhibición de CHK1 o JAK1 revirtió la remodelación cardíaca y la disfunción en ratones.
Conclusiones:
- La fosforilación de CHK1 S280 es un mediador crítico de la remodelación cardíaca inducida por la angiotensina II.
- La vía JAK1-STAT3 es activada por CHK1 en este proceso.
- Dirigirse a CHK1 presenta una vía terapéutica prometedora para la insuficiencia cardíaca hipertensiva.
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