Transferrin Is Not Involved in the Entry of 67Ga into Hepatocytes from Regenerating Liver of Partially Hepatectomized Rats.

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Ever since the first observation of 67Ga accumulation in tumors and inflammatory lesions, 67Ga has been used to detect various tumors and inflammations. The aims of this study were to clarify whether or not transferrin is involved in the uptake of 67Ga by the regenerating liver after partial hepatectomy. The uptake of 67Ga by the liver of rats reached a maximum 2d after partial hepatectomy. In order to inhibit the binding of 67Ga to transferrin in the blood, FeCl3 was administered 5 min before the injection of 67Ga. The administration of FeCl3 decreased the uptake of 67Ga by the liver of the partially hepatectomized rats, suggesting that transferrin is involved in the uptake by the liver. However, 67Ga was taken up only slightly by hepatocytes obtained from the liver of these rats. We conclude that transferrin is involved in the uptake of 67Ga by the liver tissue of partially hepatectomized rats but is not involved in its entry into the hepatocytes. Only a slight amount of gallium-67 enters the hepatocytes, and may accumulate primarily in the extracellular matrix of the liver tissue of these rats.

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