Effects of two metabolites of ochratoxin A, (4R)-4-hydroxyochratoxin A and ochratoxin alpha, on immune response in mice.
AUTOR(ES)
Creppy, E E
RESUMO
The metabolites of ochratoxin A, (4R)-4-hydroxyochratoxin A and ochratoxin alpha, were investigated for immunosuppressive properties in BALB/c mice. The standard plaque-counting technique for the estimation of antibody-producing spleen lymphocytes was used. (4R)-4-hydroxyochratoxin A was found to be an immunosuppressor almost as highly effective as ochratoxin A. Doses of 1 microgram of (4R)-4-hydroxyochratoxin A per kg administered to mice caused an 80% reduction in the number of cells producing immunoglobulin M (90% with ochratoxin A) and a 93% reduction in cells synthesizing immunoglobulin G (92% with ochratoxin A). Ochratoxin alpha, however, was ineffective. A possible mode of action is discussed.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=348057Documentos Relacionados
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