Combined radiosensitization and radioprotection for oral cavity tumors: study with an oral cavity tumor model

Adjuvant therapy with combined radioprotectors and radiosensitizers has not been extensively examined. We investigated the use of combined S-2-(3-aminopropylamino) ethylphosphorothioic acid (WR-2721), misonidazole (Ro-07-0582) and single dose radiotherapy in treating the EMT 6/Ky tumor implanted in the buccal mucosa of Balb/c mice. Our results demonstrate that single dose irradiation plus WR-2721 or misonidazole prolonged the mean survival time (MST) of EMT 6/Ky bearing Balb/c mice significantly compared to either controls or single dose irradiation plus WR-2721 and misonidazole.