Monooxygenase activity of human liver in microsomal fractions of needle biopsy specimens.
1 Methods are described for the determination of mixed function oxidase activity in microsomal fractions from percutaneous needle biopsies of human liver. 2 Activities of needle biopsy samples were comparable with those of wedge biopsy sample obtained at laparotomy from different subjects. 3 Although cytochrome P-450 content of liver from rat and man was similar, human AHH activity was only 10% of that in the rat. 4 In biopsies with preserved hepatic architecture, AHH activity and cytochrome P-450 content showed a significant positive correlation. 5 Cigarette smoking significantly increased both AHH activity and turnover number, but not cytochrome P-450 content, of biopsies with normal architecture. 6 The presence of liver disease caused a significant decrease in AHH activity and cytochrome P-450 content.
D000818:Animals; D001189:Aryl Hydrocarbon Hydroxylases / Q000378:metabolism; D001707:Biopsy, Needle; D003577:Cytochrome P-450 Enzyme System / Q000378:metabolism; D006801:Humans; D008297:Male; D008862:Microsomes, Liver / Q000201:enzymology*; D006899:Mixed Function Oxygenases / Q000378:metabolism*; D009245:NADH Dehydrogenase / Q000378:metabolism; D010088:Oxidoreductases / Q000378:metabolism*; D011506:Proteins / Q000378:metabolism; D051381:Rats
D011506:Proteins; D003577:Cytochrome P-450 Enzyme System; D006899:Mixed Function Oxygenases; D010088:Oxidoreductases; D001189:Aryl Hydrocarbon Hydroxylases; D009245:NADH Dehydrogenase