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  • Title: Net biosynthesis of antithrombin III by the isolated rat liver perfused for 12--24 hours. Compared with rat fibrinogen and alpha-2 (acute-phase) globulin, antithrombin III is not an acute phase protein.
    Author: Owens MR, Miller LL.
    Journal: Biochim Biophys Acta; 1980 Jan 03; 627(1):30-9. PubMed ID: 6153276.
    Abstract:
    Antithrombin III-heparin cofactor has been isolated from normal rat plasma, purified to homogeneity on acrylamide gel electrophoresis and used to prepare a monospecific antiserum in rabbits. Measurements of rat antithrombin III were made by a single radial immunodiffusion assay. Net synthesis of antithrombin III was investigated during 12- or 24-h perfusions of the isolated rat liver. In perfusions performed under basal conditions cumulative synthesis of antithrombin-III was observed to occur at a rate sufficient to replace the total circulating plasma antithrombin III in about 6 h. In perfusions performed under full supplementation conditions which greatly enhanced synthesis of fibrinogen and alpha-2 (acute-phase) globulin (known acute-phase reactant proteins) net synthesis of antithrombin III was not significantly greater than that observed in control perfusions. Although these prolonged perfusion studies conclusively demonstrate net synthesis of antithrombin III by the isolated rat liver, they afford no evidence that this protein is an acute-phase reactant.
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