[Experimental chemotherapy of malignant tumors in combination with short-term general hypoxia]

The effect of hypoxy on chemotherapy with emoxyl, 5-fluorouracil and bleomycin which are characterized by different affinities with oxygen has been investigated. In an experiment using 96 rats, each weighing 180 g, subcutaneously inoculated with Walker's carcinosarcoma and carcinoma. PC-1, combined use of chemotherapy and hypoxy was followed by a significant inhibition of tumor growth rate, against a background of significant drop in survival due to the increased toxic effect of the drugs. Therefore, hypoxy cannot be recommended for modifying chemotherapy of tumors irrespective of drug affinity with oxygen.