pyrimidinones and Sarcoma-180

In experiments on H mice and Wistar rats it was found that radioactivity was excreted after subcutaneous injection of Damvar-14C preponderantly in urine, and after oral administration, in faeces. After subcutaneous injection the urinary excretion set on very fast. After subcutaneous injection of Damvar-14C to H mice with Crocker's ascitic sarcoma S 180, peak radioactivity values were found in the majority of organs, blood, and ascitic fluid at hour 1 after injection; in the kidneys the peak value appeared as late as at hour 6. The renal levels were conspicuously higher than the other ones. Relatively high radioactivity levels were found in the ascitic fluid, skin, and blood. After oral administration the radioactivity levels in all organs, blood, and ascitic fluid culminated at hour 3 after ingestion. The highest levels after oral administration were likewise found in the kidneys and ascitic fluid. With the exception of the kidneys, blood, and skin, the peak values of specific radioactivity in organs were equally high or even higher after oral than after subcutaneous administration of the labeled substance. Furthermore, it was found that after administration of Damvar-14C to rat mothers the transfer of radioactivity into the milk and then into the sucklings was very slight, and so was the penetration of radioactivity into fetuses.

Topics: Administration, Oral; Animals; Female; Injections, Subcutaneous; Kinetics; Maternal-Fetal Exchange; Mice; Milk; Pregnancy; Pyrimidinones; Rats; Sarcoma 180; Tissue Distribution

Topics: Animals; Antibiotics, Antineoplastic; Azaserine; Carbon Radioisotopes; Feedback; Female; Glutamine; Glycine; Mercaptopurine; Mice; Mice, Inbred Strains; Pentosephosphates; Pentosyltransferases; Phosphoric Acids; Purine Nucleosides; Purines; Pyrazoles; Pyrimidinones; Ribonucleosides; Sarcoma 180; Selenium; Spectrophotometry, Ultraviolet; Structure-Activity Relationship