title: Inflammatory prompts produce isoform-specific changes in the expression of leukotriene B(4) omega-hydroxylases in rat liver and kidney.
abstract: Cytochrome p450 (CYP) 4Fs metabolize leukotriene B(4) and other inflammatory mediators in the arachidonic acid cascade. Here we show that lipopolysaccharide (LPS) treatment suppresses CYP4F4 and up-regulates CYP4F5 mRNA expression in rat liver whereas renal CYP4Fs are essentially unchanged. BaSO(4) treatment, in contrast, increases both hepatic and renal CYP4F expression levels. Thus, distinct regulatory mechanisms in CYP4F expression might operate under different inflammatory prompts. To examine hepatic totipotency, primary hepatocytes were treated with varying doses of LPS resulting in decrease in all the CYP4F isoforms. Treatment of hepatocytes with 5 ng/ml of interleukin-1beta mimics the in vivo effects of LPS on CYP4F expression.
authors.affiliation: Department of Biochemistry and Molecular Biology, University of Texas Medical School at Houston, Houston, TX 77030, USA.
authors.forename: Auinash
authors.initials: A
authors.lastname: Kalsotra
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Cui
authors.forename: Leposava
authors.initials: L
authors.lastname: Antonovic
authors.forename: Aaron M
authors.initials: AM
authors.lastname: Robida
authors.forename: Edward T
authors.initials: ET
authors.lastname: Morgan
authors.forename: Henry W
authors.initials: HW
authors.lastname: Strobel
mesh_terms: D000818:Animals; D001466:Barium Sulfate / Q000494:pharmacology; D003577:Cytochrome P-450 Enzyme System / Q000096:biosynthesis / Q000378:metabolism*; D000072470:Cytochrome P450 Family 4; D015971:Gene Expression Regulation, Enzymologic; D022781:Hepatocytes / Q000378:metabolism; D007249:Inflammation / Q000139:chemically induced / Q000378:metabolism; D007375:Interleukin-1 / Q000494:pharmacology; D007527:Isoenzymes; D007668:Kidney / Q000201:enzymology*; D008070:Lipopolysaccharides / Q000494:pharmacology*; D008297:Male; D008862:Microsomes, Liver / Q000201:enzymology*; D006899:Mixed Function Oxygenases / Q000096:biosynthesis / Q000378:metabolism*; D016133:Polymerase Chain Reaction / Q000379:methods; D051381:Rats; D011916:Rats, Inbred F344
chemical_list: D007375:Interleukin-1; D007527:Isoenzymes; D008070:Lipopolysaccharides; D001466:Barium Sulfate; D003577:Cytochrome P-450 Enzyme System; D006899:Mixed Function Oxygenases; D000072470:Cytochrome P450 Family 4; C040780:leukotriene B4 20-hydroxylase