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Titolo:
Redistribution of cPLA(2) in rat renal tubular cell cultures in response to PCBs
Autore:
Santiago, MF; Lopez-Aparicio, P; Recio, MN; Perez-Albarsanz, MA;
Indirizzi:
Univ Alcala de Henares, Dept Bioquim & Biol Mol, E-28871 Alcala De Henares, Madrid, Spain Univ Alcala de Henares Alcala De Henares Madrid Spain E-28871 drid, Spain
Titolo Testata:
CELLULAR SIGNALLING
fascicolo: 2, volume: 13, anno: 2001,
pagine: 111 - 118
SICI:
0898-6568(200102)13:2<111:ROCIRR>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
POLYCHLORINATED-BIPHENYLS PCBS; CYTOSOLIC PHOSPHOLIPASE A(2); SIGNAL-TRANSDUCTION; ARACHIDONIC-ACID; MEMBRANE FLUIDITY; ACTIVATION; CONGENERS; MECHANISM; RELEASE; KINASE;
Keywords:
polychlorinated biphenyls; PCB congeners; phospholipase A(2); cPLA(2); cPLA(2) expression; renal cell cultures;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
39
Recensione:
Indirizzi per estratti:
Indirizzo: Perez-Albarsanz, MA Univ Alcala de Henares, Dept Bioquim & Biol Mol, E-28871 Alcala De Henares, Madrid, Spain Univ Alcala de Henares Alcala De Henares Madrid Spain E-28871
Citazione:
M.F. Santiago et al., "Redistribution of cPLA(2) in rat renal tubular cell cultures in response to PCBs", CELL SIGNAL, 13(2), 2001, pp. 111-118

Abstract

The influence of different polychlorinated biphenyls (PCBs) upon the cytosolic phospholipase A(2) (cPLA(2)) redistribution to the particulate fraction has been investigated in rat renal proximal tubule culture cells. Treatment with Aroclor 1248 increased PLA(2) activity in the particulate fraction in a concentration-dependent manner using two radioactive substrates. However, the activity of PLA(2) in the cytosolic fraction decreased. This work also shows that 2,2',4,4',5,5'-hexachlorobiphenyl (HCB) (a di-ortho-substituted nonplanar congener) can increase the activity of PLA(2) in the particulate fraction and decrease the enzyme activity in the cytosolic fraction. The exposure of cell cultures to 3,3',4,4' tetrachlorobiphenyl (TCB) (a non-ortho-subtituted planar congener) does not alter PLA(2) activity. These results suggest that PCBs, depending on their planar or nonplanar structures, cause a translocation of the enzyme from the cytosol to membranes. To evaluate this possibility, the contents of immunoreactive cPLA(2) were examined by immunoblot analysis in the high-speed supernatant and the particulate fraction of treated cell cultures. The increases/decreases in the amounts of cPLA(2) protein agree with the increases/decreases of PLA(2) activity previously cited. These data demonstrate that the PCB-stimulated redistribution of cPLA(2) to membranes is associated, at least in part, with the changes detected in the activity of the enzyme. (C) 2001 Elsevier Science Inc. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/11/20 alle ore 17:30:03