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Serum UA levels after systemic administration of UA. Groups of rats received i.p. injection of either 100 or 250 mg kg−1 of UA and the serum UA levels were assessed in the peripheral blood 1, 3, 6, 12, and 24 h later. Control (C) rats received only saline (i.p.). Results are expressed as the mean±s.e.m. of values for each group of six animals. *P<0.05 compared to C rats at the same time point.
