In vitro evaluation of a toxic metabolite of sulfadiazine.
In vitro evaluation of a toxic metabolite of sulfadiazine.
复制标题
磺胺嘧啶有毒代谢物的体外评价。
DOI：
--
复制
发表时间：
1985
影响因子：
2.1
通讯作者：
S P Spielberg
中科院分区：
文献类型：
--
作者：
N. Shear;S P Spielberg
We have demonstrated the in vitro production of a potentially toxic metabolite of sulfadiazine Human lymphocytes were incubated with sulfadiazine and a murine hepatic microsomal drug metabolizing system. Toxicity to cells was assessed by trypan blue dye exclusion. Covalent binding of labelled sulfadiazine to microsomes also was studied. Sulfadiazine toxicity to cells was dependent on microsomes and NADPH. Binding and toxicity were decreased when microsomes were boiled or cytochrome P-450 inhibited, and by the addition of N-acetylcysteine or glutathione. The data suggest the production of a toxic intermediate of oxidative metabolism of sulfadiazine which is detoxified by conjugation with glutathione. Covalent binding of such metabolites to cell macromolecules could lead to cell death and, by acting as haptens, to secondary hypersensitivity reactions.
