HDL and electronegative LDL exchange anti- and pro-inflammatory properties
Por:
Bancells, C, Sanchez-Quesada, JL, Birkelund, R, Ordonez-Llanos, J, Benitez, S
Publicada:
1 oct 2010
Resumen:
Electronegative LDL [LDL(-)] is a minor modified LDL subfraction present in blood with inflammatory effects. One of the antiatherogenic properties of HDL is the inhibition of the deleterious effects of in vitro modified LDL. However, the effect of HDL on the inflammatory activity of LDL(-) isolated from plasma is unknown. We aimed to assess the putative protective role of HDL against the cytokine released induced in monocytes by LDL(-). Our results showed that LDL(-) cytokine release was inhibited when LDL(-) was coincubated with HDL and human monocytes and also when LDL(-) was preincubated with HDL and reisolated prior to cell incubation. The addition of apoliprotein (apo) AI instead of HDL reproduced the protective behavior of HDL. HDL preincubated with LDL(-) promoted greater cytokine release than native HDL. Incubation of LDL(-) with HDL decreased the electronegative charge, phospholipase C-like activity, susceptibility to aggregation and nonesterified fatty acid (NEFA) content of LDL(-), whereas these properties increased in HDL. NEFA content in LDL appeared to be related to cytokine production because NEFA-enriched LDL induced cytokine release. HDL, at least in part through apoAI, inhibits phospholipase- C activity and cytokine release in monocytes, thereby counteracting the inflammatory effect of LDL(-). In turn, HDL acquires these properties and becomes inflammatory.-Bancells, C., J. L. Sanchez-Quesada, R. Birkelund, J. Ordoez-Llanos, and S. Benitez. HDL and electronegative LDL exchange anti-and pro-inflammatory properties. J. Lipid Res. 2010. 51: 2947-2956.
Filiaciones:
Bancells, C:
Hosp Santa Creu & Sant Pau, Inst Recerca, Barcelona, Spain
Univ Autonoma Barcelona, Dept Bioquim & Biol Mol, Cerdanyola Del Valles, Spain
Sanchez-Quesada, JL:
Hosp Santa Creu & Sant Pau, Inst Recerca, Barcelona, Spain
Birkelund, R:
Hosp Santa Creu & Sant Pau, Inst Recerca, Barcelona, Spain
Ordonez-Llanos, J:
Hosp Santa Creu & Sant Pau, Serv Bioquim, Barcelona, Spain
Univ Autonoma Barcelona, Dept Bioquim & Biol Mol, Cerdanyola Del Valles, Spain
Benitez, S:
Hosp Santa Creu & Sant Pau, Inst Recerca, Barcelona, Spain
Hybrid Gold, Green Published
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