Abstract
To evaluate the role of the kidney in the elimination of rG·CSF, the pharmackinetics of rG·CSF was studied in rats upon removal of one (1/2-nephrectomized rat) or of two kidneys (nephrectomized rat). Plasma concentrations of rG·CSF were measured by enzyme immunoassay method. 1. The elimination half lives of rG·CSF in nephrectomized and 1/2-nephrectomized rats, which were 4.85h and 1.llh respectively, were longer than those in sham operated rats given rG·CSF 10μg/kg intravenously. Total nephrectomy and 1/2-nephrectomy resulted in 70% and 30% reduction of total body clearance of rG·CSF in rats, respectively. 2. The result suggested that the kidney is the major elimination site of rG·CSF.
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