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Titolo:
The internal redox balance of the cells influences the metabolism of lipids of dietary origin by J774 macrophages: Implications for foam cell formation
Autore:
Napolitano, M; Rivabene, R; Avella, M; Botham, KM; Bravo, E;
Indirizzi:
Ist Super Sanita, Lab Metab & Pathol Biochem, I-00161 Rome, Italy Ist Super Sanita Rome Italy I-00161 Pathol Biochem, I-00161 Rome, Italy Univ London Royal Vet Coll, Dept Vet Basic Sci, London, England Univ London Royal Vet Coll London England et Basic Sci, London, England
Titolo Testata:
JOURNAL OF VASCULAR RESEARCH
fascicolo: 4, volume: 38, anno: 2001,
pagine: 350 - 360
SICI:
1018-1172(200107/08)38:4<350:TIRBOT>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
LOW-DENSITY-LIPOPROTEIN; HUMAN MONOCYTE-MACROPHAGES; CHYLOMICRON REMNANTS; TRIGLYCERIDE ACCUMULATION; RECEPTOR PATHWAY; BETA-VLDL; GLUTATHIONE SYNTHESIS; MEDIATED OXIDATION; CHOLESTERYL ESTER; APOLIPOPROTEIN-B;
Keywords:
dietary lipids; chylomicron remnants; cellular redox balance; J774 macrophages; foam cells;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Life Sciences
Citazioni:
47
Recensione:
Indirizzi per estratti:
Indirizzo: Bravo, E Ist Super Sanita, Lab Metab & Pathol Biochem, Viale Regina Elena 299, I-00161 Rome, Italy Ist Super Sanita Viale Regina Elena 299 Rome Italy I-00161 Italy
Citazione:
M. Napolitano et al., "The internal redox balance of the cells influences the metabolism of lipids of dietary origin by J774 macrophages: Implications for foam cell formation", J VASC RES, 38(4), 2001, pp. 350-360

Abstract

The effects of chylomicron remnants on lipid accumulation in J774 macrophages, and the incorporation of radioactivity from remnant lipids radiolabelled with [H-3]oleate into cellular lipids was investigated. After 24 h of incubation with chylomicron remnants, there was considerable accumulation of lipid within the cells as assessed by staining with oil red O, indicating that the particles induce the formation of foam cells. Fatty acids released from the radiolabelled remnant lipids after uptake were found to be incorporated into cellular triacylglycerol (52%), phospholipid (37%) and cholesteryl ester (8%), but at higher remnant concentrations, the proportion used for triacylglycerol formation increased (up to 73%). When the macrophages were shifted into a pro-oxidising or pro-reducing state by incubation (24 h) with CuSO4 (2.5 muM) or N-acetylcysteine (5 mM), respectively, the incorporation of [H-3]oleate from remnant lipid into cellular triacylglycerol and phospholipid was increased by 20-30% in the more oxidised as compared with the more reduced cells. These findings indicate that exposure of J774 macrophages to chylomicron remnants leads to the accumulation of lipid within the cells, and that this process is enhanced by pro-oxidising conditions. We conclude, therefore, that both lipids of dietary origin and the redox balancewithin macrophages may have a significant role in the induction of foam cell formation. Copyright (C) 2001 S.Karger AG, Basel.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 19/02/20 alle ore 21:03:56