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Resolvin D2 es un potente regulador de los leucocitos y controla la sepsis microbiana
Matthew Spite1, Lucy V Norling, Lisa Summers
1Center for Experimental Therapeutics and Reperfusion Injury, Department of Anesthesiology, Perioperative and Pain Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts 02115, USA.
Nature
|October 30, 2009
Resumen
Resolvin D2 (RvD2) resuelve activamente la inflamación reduciendo la migración de neutrófilos y la carga bacteriana. Este mediador lipídico mejora la supervivencia en modelos de sepsis al promover la resolución inmune y la vigilancia.
Área de la Ciencia:
- Inmunología Inmunología.
- La bioquímica es la bioquímica.
- Farmacología Farmacología.
Sus antecedentes:
- La resolución de la inflamación es un proceso activo y complejo.
- Resolvins son mediadores de lípidos que orquestan el declive de la enfermedad (catabasis).
- Anteriormente no estaba clara la función específica de Resolvin D2 (RvD2) en la resolución.
Objetivo del estudio:
- Para aclarar las funciones pro-resolución específicas de RvD2.
- Para investigar los mecanismos de RvD2 en la reducción de la inflamación excesiva.
- Para evaluar el potencial terapéutico de RvD2 en condiciones inflamatorias como la sepsis.
Principales métodos:
- Investigó los efectos de RvD2 en el tráfico de neutrófilos y las interacciones leucocito-endotelial in vivo.
- Se administró RvD2 a ratones con sepsis polimicrobiana inducida por ligadura y punción cecal (CLP).
- Se evaluó el impacto de RvD2 en la carga bacteriana, la producción de citoquinas, el reclutamiento de células inmunes y la fagocitosis de macrófagos.
Principales resultados:
- RvD2 demostró una potente reducción estereoselectiva de la migración de neutrófilos a los sitios inflamatorios.
- RvD2 disminuyó las interacciones leucocito-endotelial a través de la producción de óxido nítrico y alteró la expresión del receptor de adhesión.
- En la sepsis inducida por CLP, RvD2 redujo la carga bacteriana, los niveles de citoquinas y el reclutamiento de neutrófilos, al tiempo que mejoraba la fagocitosis de los macrófagos.
- El tratamiento con RvD2 aumentó significativamente las tasas de supervivencia en modelos de sepsis.
Conclusiones:
- RvD2 es un potente regulador endógeno de las respuestas inflamatorias excesivas.
- RvD2 actúa a través de múltiples objetivos celulares para estimular la resolución de la inflamación.
- RvD2 preserva la vigilancia inmune mientras promueve la resolución, ofreciendo potencial terapéutico para la sepsis y otras enfermedades inflamatorias.
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