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Effect of size of Morris hepatoma 5123D on gamma-glutamyltranspeptidase activity in serum and urine.

Close correlation between the size of Morris hepatoma 5123D implanted in the hind limb of rat and serum gamm-glutamyltranspeptidase activity was found. The tumour implanted in both hind legs of the rat resulted in about twofold increase of the serum enzyme activity. The growth of the hepatoma resulted also in a significant increase in the enzyme activity in urine of the tumour-bearing rats. After surgical removal of the leg with hepatoma a rapid decrease in the enzyme activity in both the studied body fluids and its subsequent renewed increase associated with formation of pulmonary metastases were observed. Partial hepatectomy and pancreatectomy were without effect on the serum gamma-glutamyltranspeptidase activity.