Liposomal prednisolone promotes macrophage lipotoxicity in experimental atherosclerosis.
Nanomedicine
; 12(6): 1463-70, 2016 08.
Article
en En
| MEDLINE
| ID: mdl-27015770
Atherosclerosis is a lipid-driven inflammatory disease, for which nanomedicinal interventions are under evaluation. Previously, we showed that liposomal nanoparticles loaded with prednisolone (LN-PLP) accumulated in plaque macrophages, however, induced proatherogenic effects in patients. Here, we confirmed in low-density lipoprotein receptor knockout (LDLr(-/-)) mice that LN-PLP accumulates in plaque macrophages. Next, we found that LN-PLP infusions at 10mg/kg for 2weeks enhanced monocyte recruitment to plaques. In follow up, after 6weeks of LN-PLP exposure we observed (i) increased macrophage content, (ii) more advanced plaque stages, and (iii) larger necrotic core sizes. Finally, in vitro studies showed that macrophages become lipotoxic after LN-PLP exposure, exemplified by enhanced lipid loading, ER stress and apoptosis. These findings indicate that liposomal prednisolone may paradoxically accelerate atherosclerosis by promoting macrophage lipotoxicity. Hence, future (nanomedicinal) drug development studies are challenged by the multifactorial nature of atherosclerotic inflammation.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Prednisolona
/
Aterosclerosis
Límite:
Animals
/
Humans
Idioma:
En
Revista:
Nanomedicine
Asunto de la revista:
BIOTECNOLOGIA
Año:
2016
Tipo del documento:
Article
Pais de publicación:
Estados Unidos