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Abstract

Identification and induction of cytochrome P450 2E1 in rat Kupffer cells.

D R Koop, A Chernosky and E P Brass
Journal of Pharmacology and Experimental Therapeutics September 1991, 258 (3) 1072-1076;
D R Koop
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A Chernosky
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E P Brass
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Abstract

Kupffer cells, the resident macrophages of the liver, have a well characterized role in the removal of blood-born foreign substances by phagocytosis. Because Kupffer cells may contribute to hepatic xenobiotic metabolism, the current studies evaluated the presence and inducibility of P450 2E1 in rat Kupffer cells. Hepatocytes and Kupffer cells were isolated from the livers of control and acetone-treated (1% v/v acetone in the drinking water for 7 days) rats. P450 2E1 was immunochemically detectable at low levels in Kupffer cell homogenates from untreated rats and was induced greater than 10-fold by acetone-treatment. The presence of P450 2E1 in Kupffer cells from untreated rats was confirmed by inhibition of benzene hydroxylation with anti-P450 2E1 immunoglobulin G. Benzene hydroxylase activity was induced 16.3-fold in Kupffer cells isolated from acetone-treated rats and remained 70% inhibitable by anti-P450 2E1 antibody. The benzene hydroxylase activity of hepatocytes from the same animals was induced 3.9-fold by acetone treatment. The specific activity for benzene hydroxylation of Kupffer cell homogenates from acetone-treated rats was nearly equal to that for the hepatocytes from the same animals. The presence and inducibility of P450 2E1 in Kupffer cells suggests that, under conditions where P450 2E1 is induced, Kupffer cell-generated metabolites may contribute to Kupffer cell toxicity, as well as general hepatic injury.

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Journal of Pharmacology and Experimental Therapeutics
Vol. 258, Issue 3
1 Sep 1991
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Abstract

Identification and induction of cytochrome P450 2E1 in rat Kupffer cells.

D R Koop, A Chernosky and E P Brass
Journal of Pharmacology and Experimental Therapeutics September 1, 1991, 258 (3) 1072-1076;

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Abstract

Identification and induction of cytochrome P450 2E1 in rat Kupffer cells.

D R Koop, A Chernosky and E P Brass
Journal of Pharmacology and Experimental Therapeutics September 1, 1991, 258 (3) 1072-1076;
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