Title : Inhibition of urethane-induced genotoxicity and cell proliferation in CYP2E1-null mice.

Pub. Date : 2005 May 2

PMID : 15790490






7 Functional Relationships(s)
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1 Inhibition of urethane-induced genotoxicity and cell proliferation in CYP2E1-null mice. Urethane cytochrome P450, family 2, subfamily e, polypeptide 1 Mus musculus
2 Recent work in this laboratory demonstrated for the first time that CYP2E1 is the principal enzyme responsible for urethane metabolism. Urethane cytochrome P450, family 2, subfamily e, polypeptide 1 Mus musculus
3 The current studies were undertaken to assess the relationships between CYP2E1-mediated metabolism and urethane-induced genotoxicity and cell proliferation as determined by induction of micronucleated erythrocytes (MN) and expression of Ki-67, respectively, using CYP2E1-null and wild-type mice. Urethane cytochrome P450, family 2, subfamily e, polypeptide 1 Mus musculus
4 The current studies were undertaken to assess the relationships between CYP2E1-mediated metabolism and urethane-induced genotoxicity and cell proliferation as determined by induction of micronucleated erythrocytes (MN) and expression of Ki-67, respectively, using CYP2E1-null and wild-type mice. Urethane cytochrome P450, family 2, subfamily e, polypeptide 1 Mus musculus
5 Subsequent comparative metabolism studies demonstrated that total urethane-derived radioactivity in the plasma, liver, and lung was significantly higher in CYP2E1-null versus wild-type mice and un-metabolized urethane constituted greater than 83% of the radioactivity in CYP2E1-null mice. Urethane cytochrome P450, family 2, subfamily e, polypeptide 1 Mus musculus
6 Subsequent comparative metabolism studies demonstrated that total urethane-derived radioactivity in the plasma, liver, and lung was significantly higher in CYP2E1-null versus wild-type mice and un-metabolized urethane constituted greater than 83% of the radioactivity in CYP2E1-null mice. Urethane cytochrome P450, family 2, subfamily e, polypeptide 1 Mus musculus
7 In conclusion, these data demonstrated that CYP2E1-mediated metabolism of urethane, presumably via epoxide formation, is necessary for the induction of genotoxicity, and cell proliferation in the liver and lung of wild-type mice. Urethane cytochrome P450, family 2, subfamily e, polypeptide 1 Mus musculus