Effects of Fluosol DA 20% and carbogen on the radioresponse of SCK tumors and skin of A/J mice.
The effect of Fluosol DA 20%, an emulsion of perfluorochemicals, in combination with carbogen (95% O2 and 5% CO2) breathing on the response of mouse tumors to radiation was studied. When A/J mice bearing SCK tumors in the right hind limb were injected iv with Fluosol DA 20% at 12 ml/kg and exposed to carbogen for 1 h before and during the irradiation of tumors, the response of tumors to a single dose of X irradiation was significantly enhanced. The dose modification factors for growth delay and cure of SCK tumors were 2.10 +/- 0.01 (SE) and 1.86 +/- 0.18 (SE), respectively. Such a treatment slightly increased the radiation-induced skin damage by a factor of 1.17 +/- 0.02 (SE), resulting in a therapeutic gain of 1.79 +/- 0.01 (SE) for the growth delay and 1.59 +/- 0.09 (SE) for the curability. Carbogen breathing alone also increased the response of tumor and skin to radiation, but it was far less effective than the combination of Fluosol DA 20% and carbogen breathing. It was concluded that iv injection of Fluosol DA 20% in conjunction with carbogen breathing significantly increased the O2 transport to hypoxic areas in the SCK tumors and thus significantly enhanced the tumoricidal effect of radiation on SCK tumors.
D000280:Administration, Inhalation; D000818:Animals; D002245:Carbon Dioxide / Q000008:administration & dosage / Q000627:therapeutic use*; D003131:Combined Modality Therapy; D004338:Drug Combinations / Q000627:therapeutic use; D005466:Fluorocarbons / Q000627:therapeutic use*; D006895:Hydroxyethyl Starch Derivatives; D008297:Male; D008325:Mammary Neoplasms, Experimental / Q000188:drug therapy / Q000532:radiotherapy*; D051379:Mice; D009368:Neoplasm Transplantation; D010100:Oxygen / Q000008:administration & dosage / Q000627:therapeutic use*; D011838:Radiation-Sensitizing Agents / Q000627:therapeutic use*; D012867:Skin / Q000187:drug effects / Q000528:radiation effects*
D004338:Drug Combinations; D005466:Fluorocarbons; D006895:Hydroxyethyl Starch Derivatives; D011838:Radiation-Sensitizing Agents; D002245:Carbon Dioxide; C017323:glucose, glycerol, hydroxyethyl starch, perfluorodecalin, perfluorotripropylamine, pluronic F-68, salts, yolk phospholipids drug combination; C011700:carbogen; D010100:Oxygen