title: Amino acid metabolism by hepatocytes in a hybrid liver support bioreactor.
abstract: The amino acid patterns of medium perfusate in a liver cell bioreactor developed for a hybrid liver support system have been measured. There were considerable changes in the concentrations of glutamic acid, glutamine, alanine, arginine, ornithine and branched chain amino acids during the first 10 days which is indicative of dynamic cellular metabolism. From day 15, steady state conditions of nitrogen metabolism are reflected by stable amino acid turnover. Monitoring of urea, K+, and P-450 activity suggests that hepatocytes have switched to a stable protein synthesis with a general amino acid uptake and keto acid release following cell volume increase.
authors.affiliation: Klinikum Rudolf Virchow, Freie Universität, Berlin, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Fuchs
authors.forename: J
authors.initials: J
authors.lastname: Gerlach
authors.forename: J
authors.initials: J
authors.lastname: Encke
authors.forename: J
authors.initials: J
authors.lastname: Unger
authors.forename: M
authors.initials: M
authors.lastname: Smith
authors.forename: P
authors.initials: P
authors.lastname: Neuhaus
authors.forename: E
authors.initials: E
authors.lastname: Riedel
mesh_terms: D000596:Amino Acids / Q000378:metabolism*; D000818:Animals; D001187:Artificial Organs / Q000592:standards*; D001485:Basement Membrane / Q000502:physiology; D002478:Cells, Cultured; D002851:Chromatography, High Pressure Liquid; D003577:Cytochrome P-450 Enzyme System / Q000378:metabolism; D004727:Endothelium / Q000166:cytology; D008099:Liver / Q000166:cytology* / Q000378:metabolism; D008297:Male; D008567:Membranes, Artificial; D011188:Potassium / Q000378:metabolism; D013050:Spectrometry, Fluorescence; D013552:Swine; D014508:Urea / Q000378:metabolism
chemical_list: D000596:Amino Acids; D008567:Membranes, Artificial; D014508:Urea; D003577:Cytochrome P-450 Enzyme System; D011188:Potassium