Multiple Adjuvant Therapy on a Murine Fibrosarcoma: Actinomycin-D, X-lrradiation and Local Tumor Hyperthermia

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Abstract
The tumoricidal activities of single dose x-irradiation (RAD) and concomitant Actinomycin D (AMD) with or without local tumor hyperthermia (LTH) on an in vivo Methylcholanthreme-induced fibrosarcoma (Meth-A) are described. The addition of LTH enhanced the actions of AMD, RAD and AMD + RAD; the trimodality treatment was most effective. Based on delay of tumor growth, the radiation dose reduction factors for AMD + RAD + LTH compared to RAD; AMD + RAD + LTH, were approximately 2.8, 2.1, and 1.8, respectively. The shape of the curves suggests a further decrease in the ability of the tumor cell to repair sublethal damage with AMD + RAD + LTH. The clinical relevance is not determined.

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