Immunotoxicity of In Vitro Vanadium Exposures: Effects on Interleukin-1, Tumor Necrosis Factor-A, and Prostaglandin E2 Production by WEHI-3 Macrophages
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1993/04/01
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Description:Treatment of cultured mouse macrophages with either of two different vanadium compounds was shown to affect the production/release of two major immunoregulatory cytokines. The pentavalent vanadium compound ammonium metavanadate was shown previously to disrupt cell-mediated immunity at the earliest stages of an in vivo anti-Listerial response, in that mice treated with vanadium displayed decreased accessory cell recruitment and numbers of activated macrophages at infection sites. To determine whether these effects were due to vanadium-induced alterations in the production of biologically-active mediators, mouse macrophage-like WEHI-3 cells were treated in vitro with ammonium metavanadate or vanadium pentoxide prior to stimulation with lipopolysaccharide endotoxin (LPS). After stimulation, monokine (tumor necrosis factor-a and interleukin-1) and prostaglandin E2 (PGE2) activities were assessed. Both vanadium compounds decreased recovered monokine activities; measured TNFa concentrations were also reduced. Spontaneous release of the IL-1/TNF-regulating prostanoid PGE2 was significantly increased by the highest concentration of vanadate tested, although LPS-stimulated PGE2 production was unaffected by either compound. These results indicate that, in vitro, pentavalent vanadium can interfere with immunoregulatory mediators critical for maintaining host immunocompetence. [Description provided by NIOSH]
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ISSN:0192-0561
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Pages in Document:437-446
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Volume:15
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Issue:3
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NIOSHTIC Number:nn:20060106
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Citation:Int J Immunopharmacol 1993 Apr; 15(3):437-446
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Contact Point Address:Mitchell D. Cohen, Department of Environmental Medicine, New York University Medical Center, Long Meadow Road, Tuxedo, NY 10987, U.S.A.
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CAS Registry Number:
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Federal Fiscal Year:1993
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Performing Organization:Mount Sinai School of Medicine, New York
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Peer Reviewed:True
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Start Date:19920701
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Source Full Name:International Journal of Immunopharmacology
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End Date:19970630
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Main Document Checksum:urn:sha-512:5ec5613e297ccb241a777022a8cc796ec405cca4fba3dd33807d309a32ef886bfed2198b632e55839de71db7be7006bede463b0c45ccf6101c815f0ab89649ee
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