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La carbonilación de Runx2 en K176 por 4-Hydroxynonenal acelera la calcificación vascular
Xiaoxuan Zhai1,2,3, Shengchuan Cao1,2,3, Jiali Wang1,2,3,4
1Department of Emergency and Chest Pain Center, Qilu Hospital of Shandong University, Jinan, China (X.Z., S.C., J.W., B.Q., X.L., R.H., M.Z., S.S., Y.H., S.W., J.P., Q.Y., F.X., S.W., Y.C.).
Circulation
|February 13, 2024
Resumen
El 4-hydroxynonenal (4-HNE) promueve la calcificación vascular mediante la estabilización de Runx2. La aldehído deshidrogenasa 2 (ALDH2) protege contra este proceso, lo que sugiere que ALDH2 es un objetivo terapéutico para la calcificación vascular.
Área de la Ciencia:
- La bioquímica
- Biología cardiovascular
- La medicina molecular
Sus antecedentes:
- La calcificación vascular implica mecanismos complejos y regulados y está relacionada con eventos cardiovasculares adversos.
- El papel del 4-hidroxinonenal (4-HNE), un producto de la peroxidación lipídica, en la calcificación vascular no se comprende bien.
Objetivo del estudio:
- Investigar el papel del 4-HNE en la calcificación vascular.
- Para explorar la participación de la aldehído deshidrogenasa 2 (ALDH2) en este proceso.
- Para identificar posibles objetivos terapéuticos para la calcificación vascular.
Principales métodos:
- Los niveles de 4-HNE medidos en pacientes con enfermedad renal crónica y controles.
- Se analizó la deposición de calcio y el 4-HNE en placas coronarias.
- Se evaluó la asociación entre la calcificación coronaria y la mutación ALDH2 rs671 en pacientes.
- Utilizó knockout ALDH2 y modelos de ratón transgénicos para estudiar la calcificación vascular.
- Investigó la calcificación celular y los mecanismos moleculares en las células del músculo liso aórtico cultivadas.
Principales resultados:
- Se encontraron niveles elevados de 4-HNE en pacientes con enfermedad renal crónica y en arterias calcificadas.
- La deficiencia de ALDH2 aceleró la calcificación vascular, mientras que la sobreexpresión/ activación de ALDH2 la impidió.
- Los pacientes con la mutación ALDH2 rs671 presentaron una calcificación coronaria más grave.
- El 4-HNE promovió la calcificación de las células musculares lisas vasculares in vitro al aumentar los niveles de Runx2.
- El 4-HNE carboniza directamente Runx2 en K176, mejorando su estabilidad y promoviendo la calcificación.
Conclusiones:
- El 4-HNE promueve la calcificación vascular al carbonilar y estabilizar directamente el Runx2.
- La ALDH2 juega un papel protector contra la calcificación vascular.
- ALDH2 es un objetivo terapéutico potencial para el tratamiento de la calcificación vascular.
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