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El ácido eicosapentaenoico (EPA) limita la oxidación más rápida de las lipoproteínas (Lp) en comparación con otras
Samuel C R Sherratt1,2, Peter Libby3, Richard L Dunbar4
1Mount Sinai Fuster Heart Hospital, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
Cardiovascular research
|August 25, 2025
Resumen
El aumento de la lipoproteína a) [Lp a) ] en el plasma se oxida rápidamente, aumentando el riesgo cardiovascular. El ácido graso omega-3 ácido eicosapentaenoico (EPA) limita efectivamente la oxidación Lp (a) y el estrés celular asociado.
Área de la Ciencia:
- Ciencias cardiovasculares
- Metabolismo de los lípidos
- Biología del estrés oxidativo
Sus antecedentes:
- El aumento de la lipoproteína a) [Lp a) ] es un factor de riesgo significativo para la enfermedad cardiovascular.
- Lp (a) se enriquece con fosfolípidos oxidados, lo que podría conducir a una mayor oxidación de los lípidos.
- El ácido eicosapentaenoico (EPA), un ácido graso omega-3, tiene propiedades antioxidantes.
Objetivo del estudio:
- Investigar si el plasma enriquecido con Lp (a) sufre una oxidación acelerada en comparación con otras lipoproteínas.
- Determinar si la EPA limita la oxidación del plasma enriquecido con Lp (a) de manera más eficaz que otros agentes.
- Evaluar el impacto de la EPA en las respuestas al estrés celular en las células endoteliales expuestas a Lp (a) oxidada.
Principales métodos:
- Enriquecimiento de plasma con Lp, LDL de baja densidad (sdLDL) y VLDL.
- Incubación de fracciones de lipoproteínas con EPA u otros agentes seguidos de oxidación inducida por cobre.
- Seguimiento de la oxidación a través de la formación de malondialdehído.
- Análisis proteómico de células endotelial de la vena umbilical humana (HUVEC) expuestas a Lp oxidado (a) con o sin EPA.
Principales resultados:
- El plasma enriquecido con Lp (a) exhibió el contenido de lípidos oxidados más alto al inicio y sufrió la oxidación más rápida.
- EPA atenuó significativamente la oxidación del plasma enriquecido con Lp, a diferencia de los ácidos grasos menos insaturados o los agentes reductores de lípidos.
- El efecto antioxidante de la EPA en Lp (a) mitigó los cambios en la expresión de proteínas proinflamatorias y relacionadas con el estrés celular en los HUVEC.
Conclusiones:
- El plasma enriquecido con Lp es más susceptible a la oxidación que otras lipoproteínas que contienen ApoB.
- La EPA limita efectivamente la oxidación Lp (a) y las respuestas inflamatorias subsiguientes de las células endoteliales.
- La acción antioxidante de la EPA sobre la Lp (a) puede ser la base de sus beneficios para reducir el riesgo cardiovascular en individuos con Lp (a) elevada.
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