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  • Title: Improving local tumor control by combining vascular targeting drugs, mild hyperthermia and radiation.
    Author: Horsman MR, Murata R, Overgaard J.
    Journal: Acta Oncol; 2001; 40(4):497-503. PubMed ID: 11504310.
    Abstract:
    Improvement in local control in a foot-implanted (200 mm3) C3H mouse mammary carcinoma by combining vascular targeting drugs, mild hyperthermia and radiation was investigated. The vascular targeting drug was flavone acetic acid (FAA; 150 mg/kg) intraperitoneally injected either 3 h before local tumor water-bath heating or 1 h after local tumor irradiation. For untreated tumors, the average (+/- 1 S.E.) tumor growth time (TGT; time to reach 5 x treatment volume) was 7.1 days (+/- 0.4). This was increased to 9.2 days (+/- 0.7) by using FAA. Heating also increased TGT, the effect being temperature and time dependent, and this heat response was further increased by FAA. The radiation dose (+/- 95% confidence interval) to control 50% of tumors (TCD50) 90 days after irradiation was 52 Gy (50-55) for radiation alone. This was decreased to 42 Gy (39-45) by FAA, 47 Gy (45-50) by heating (41.5 degrees C; 60 min) 4 h after irradiation, and to 28 Gy (22-35) by combining FAA and heat. Thus, vascular targeting drugs can improve the efficacy of mild hyperthermia and radiation.
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