Tissue specific changes in the expression of glutamate-cysteine ligase mRNAs in mice exposed to methylmercury.
Toxicol Lett
; 122(2): 119-29, 2001 Jun 20.
Article
em En
| MEDLINE
| ID: mdl-11439218
ABSTRACT
Glutamate-cysteine ligase (GLCL), the rate-limiting enzyme in glutathione (GSH) synthesis is composed of two subunits, a catalytic (GLCLc) and a regulatory subunit (GLCLr). These two subunits are known to be differentially regulated in vitro, in different cell types and in response to various xenobiotic exposures. In this study, we examined whether these two subunits can also be differentially regulated in vivo. We found that GLCLc and GLCLr are differentially regulated at the transcriptional level in a tissue-dependent manner in female mice treated with methylmercury (MeHg). MeHg caused a downregulation of both subunit mRNAs in the liver, upregulation of both subunit mRNAs in the kidney and upregulation of only the catalytic subunit mRNA in the small intestine of female mice treated with a single dose of MeHg (6 mg/kg) by intraperitoneal injection. These results suggest that GLCLc and GLCLr can be differentially regulated in vivo, and that this regulation is tissue dependent in the mouse.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
RNA Mensageiro
/
Regulação Enzimológica da Expressão Gênica
/
Glutamato-Cisteína Ligase
/
Compostos de Metilmercúrio
Limite:
Animals
Idioma:
En
Revista:
Toxicol Lett
Ano de publicação:
2001
Tipo de documento:
Article