代谢
... 5-硝基蒽酚的代谢,通过研究Aroclor预处理大鼠肝脏9000 x g上清液中的代谢过程。主要的一级代谢物是1-羟基-5-硝基蒽酚和2-羟基-5-硝基蒽酚。这些代谢物被氧化成1-氧代-5-硝基蒽酚和2-氧代-5-硝基蒽酚,被羟基化成顺式-1,2-二羟基-5-硝基蒽酚和反式-1,2-二羟基-5-硝基蒽酚,并且被还原成1-羟基-5-氨基蒽酚和2-羟基-5-氨基蒽酚。还观察到1-氧代-5-硝基蒽酚和2-氧代-5-硝基蒽酚还原成1-氧代-5-氨基蒽酚和2-氧代-5-氨基蒽酚。当在富氮气氛中(氮气中含10%氧气)进行培养时,主要代谢物是1-羟基-和2-羟基-5-硝基蒽酚以及2-氧代-5-氨基蒽酚。对某些代谢物进行了针对鼠伤寒沙门氏菌TA 98的诱变性测试。在存在或不存在大鼠肝脏9000 x g上清液的情况下,测试的代谢物中诱变性最强的是1-羟基-5-硝基蒽酚和1-氧代-5-硝基蒽酚。这些结果表明,Aroclor预处理大鼠肝脏的9000 x g上清液能够催化5-硝基蒽酚的氧化和还原,并且1-羟基-或2-羟基-或1-氧代-或2-氧代-5-硝基蒽酚的还原衍生物是近端诱变剂。
The metabolism of ... 5-nitroacenaphthene, by the 9000 x g supernatant from the livers of Aroclor-pretreated rats was studied. The major primary metabolites were 1-hydroxy-5-nitroacenaphthene and 2-hydroxy-5-nitroacenaphthene. These metabolites were oxidized to 1-oxo-5-nitroacenaphthene and 2-oxo-5-nitroacenaphthene, hydroxylated to cis-1,2-dihydroxy-5-nitroacenaphthene and trans-1,2-dihydroxy-5-nitroacenaphthene, and reduced to 1-hydroxy-5-aminoacenaphthene and 2-hydroxy-5-aminoacenaphthene. Reduction of 1- and 2-oxo-5-nitroacenaphthene to 1-oxo- and 2-oxo-5-aminoacenaphthene was also observed. When incubations were carried out in a N2-enriched atmosphere (10% O2 in N2), the major metabolites were 1-hydroxy- and 2-hydroxy-5-nitroacenaphthene and 2-oxo-5-aminoacenaphthene. Selected metabolites were tested for mutagenicity toward Salmonella typhimurium TA 98. The most mutagenic of the metabolites tested, in the presence or absence of rat liver 9000 x g supernatant, were 1-hydroxy-5-nitroacenaphthene and 1-oxo-5-nitroacenaphthene. These results indicate that the 9000 x g supernatant from the livers of Aroclor-pretreated rats is capable of catalyzing both the oxidation and reduction of 5-nitroacenaphthene and that the reduced derivatives of 1-hydroxy- or 2-hydroxy- or 1-oxo- or 2-oxo-5-nitroacenaphthene are proximate mutagens.
来源:Hazardous Substances Data Bank (HSDB)