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Titolo:
HUMAN (THP-1) MACROPHAGES OXIDIZE LDL BY A THIOL-DEPENDENT MECHANISM (VOL 21, PG 295, 1994)
Autore:
GRAHAM A; WOOD JL; OLEARY VJ; STONE D;
Indirizzi:
WELLCOME RES LABS,DEPT BIOCHEM SCI BECKENHAM BR3 3BS KENT ENGLAND
Titolo Testata:
Free radical research
fascicolo: 2, volume: 25, anno: 1996,
pagine: 181 - 192
SICI:
1071-5762(1996)25:2<181:H(MOLB>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
LOW-DENSITY-LIPOPROTEIN; SMOOTH-MUSCLE CELLS; HUMAN MONOCYTE-MACROPHAGES; OXIDATIVE MODIFICATION; MEDIATED OXIDATION; CHOLESTEROL DEPOSITION; FOAM CELLS; LINE THP-1; SUPEROXIDE; METABOLISM;
Keywords:
HUMAN MACROPHAGES; THIOLS; OXIDIZED LOW-DENSITY LIPOPROTEIN; ATHEROSCLEROSIS;
Tipo documento:
Correction, Addition
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
48
Recensione:
Indirizzi per estratti:
Citazione:
A. Graham et al., "HUMAN (THP-1) MACROPHAGES OXIDIZE LDL BY A THIOL-DEPENDENT MECHANISM (VOL 21, PG 295, 1994)", Free radical research, 25(2), 1996, pp. 181-192

Abstract

The oxidative modification of low-density lipoprotein by macrophages may be an important mechanism in the pathogenesis of atherosclerosis. The human monocytic leukaemia cell line THP-1, when stimulated with phorbol ester, shares many properties with human monocyte-derived macrophages. Oxidation of LDL by these cells was characterised by depletion of alpha-tocopherol, increases in thiobarbituric acid reactive substances and increases in electrophoretic mobility. The LDL particles were also converted to a form which increased accumulation of cholesteryl esters within macrophages. The oxidative mechanism appeared to be dependent upon the presence of thiols in the cellular medium. Oxidation of LDL by THP-1 macrophages, and production of thiols by these cells, were dependent upon the presence of L-cystine in the medium. Furthermore,cellular oxidation of LDL could be partially mimicked by the additionof cysteine to Hams F10 medium. Macrophage-independent oxidation of LDL, mediated by the addition of copper ions, was inhibited by cystine and cysteine in phosphate buffered saline, but not in Hams F10 medium. The glutathione content of THP-1 macrophages was also dependent upon the presence of cysteine or cystine in the medium, but inhibition of glutathione synthesis by buthionine sulfoximine did not prevent the production of thiols or the oxidation of LDL by THP-1 macrophages.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/02/20 alle ore 08:30:19