Symposium overview: Characterization of xenobiotic metabolizing enzyme function using heterologous expression systems.
Toxicol Sci
; 48(2): 143-50, 1999 Apr.
Article
en En
| MEDLINE
| ID: mdl-10353304
Genetically modified cell lines can be very useful models for assessing the toxicologic effects of modulation of expression of individual gene products in comparison to their isogenic parental control cell lines. This symposium begins with an overview of general issues related to development and utilization of model systems created by transfection of cell lines to induce elevated expression of metabolic enzymes of toxicologic relevance. Selected studies that illustrate the heterologous expression rationale and various approaches to transgenic-cell model construction are represented. Results to date with cells engineered to express specific transfected genes are discussed, with emphasis on the effects of expression of selected phase I or phase II enzymes on cellular sensitivity to several toxic end-points. The individual sections highlight the utility of these model cell lines for examining the role of enzyme catalysis and function in metabolism of biologically active xenobiotic or endobiotic compounds of interest in toxicology. Both activating and detoxifying enzymes are discussed, with principal emphasis on the latter. This symposium includes talks on transfected cells that express aldehyde dehydrogenases, superoxide dismutase, UDP-glycosyltransferases, glutathione transferases, and cytochrome P450 isozymes. In addition to the general toxicologic utility and advantages of these genetically engineered cell lines, this overview emphasizes their particular contributions to the insights obtained to date with the specific model cell lines.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Xenobióticos
/
Técnicas de Transferencia de Gen
/
Enzimas
Límite:
Animals
/
Humans
Idioma:
En
Revista:
Toxicol Sci
Asunto de la revista:
TOXICOLOGIA
Año:
1999
Tipo del documento:
Article
País de afiliación:
Estados Unidos
Pais de publicación:
Estados Unidos