title: Elimination Half-Lives of Acute Phase Proteins in Rats and Beagle Dogs During Acute Inflammation.
abstract: The half-lives of typical acute phase proteins in rats and beagle dogs during acute inflammation were investigated. Acute inflammation was induced by injection of turpentine oil in rats and administration of indomethacin in beagle dogs. Serum concentrations of α2-macroglobulin (α2M) and C-reactive protein (CRP) were measured by enzyme-linked immunosorbent assay and α1-acid glycoprotein (AAG) was measured by single radial immunodiffusion. Half-life was calculated as 0.693/elimination rate constant (K). The mean half-lives in the terminal elimination phase of α2M and AAG were 68.1 and 164.8 h, respectively. The half-life of AAG was significantly longer than that of α2M. Mean half-lives in the terminal elimination phase of CRP and AAG were 161.9 and 304.4 h, respectively. The half-life of AAG was significantly longer than that of CRP in beagle dogs. No significant differences in the half-life of AAG were observed between rats and beagle dogs. Furthermore, serum concentrations in the terminal elimination phase could be simulated with the K data acquired in this study.
authors: Graduate School of Environmental and Health Science, Azabu University, 1-17-71 Fuchinobe, Chou-ku, Sagamihara, Kanagawa, 252-5201, Japan.
authors: Takashi
authors: T
authors: Kuribayashi
authors: Tetsuro
authors: T
authors: Seita
authors: Eiichi
authors: E
authors: Momotani
authors: Shunsuke
authors: S
authors: Yamazaki
authors: Kohei
authors: K
authors: Hagimori
authors: Shizuo
authors: S
authors: Yamamoto
mesh_terms: D000209:Acute-Phase Proteins / Q000378:metabolism*; D000210:Acute-Phase Reaction / Q000097:blood* / Q000473:pathology; D000818:Animals; D002097:C-Reactive Protein / Q000378:metabolism*; D004285:Dogs; D006207:Half-Life; D007249:Inflammation / Q000097:blood / Q000473:pathology; D008297:Male; D009961:Orosomucoid / Q000378:metabolism*; D051381:Rats; D017207:Rats, Sprague-Dawley; D013045:Species Specificity; D000511:alpha-Macroglobulins / Q000378:metabolism*
chemical_list: D000209:Acute-Phase Proteins; C506108:Orm1 protein, rat; D009961:Orosomucoid; D000511:alpha-Macroglobulins; D002097:C-Reactive Protein
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