Antitumour effect of RA 233 alone and combined with radiotherapy

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Abstract
The effect of RA233 alone or in combination with radiation was investigated in vivo on the 5180 sarcoma, the B16 melanoma and the Lewis lung carcinoma. The combined treatment was a significant improvement over radiation alone for the B16 and S180 tumours. RA233 alone did not influence the growth of these tumours. When the primary 3LL was irradiated, tumour size was unaffected but the number of pulmonary metastases was reduced. They were further reduced by the combination of RA233 and radiation. The number, volume and cytokinetics of the B16 cells and the 3LL cells were affected to varying degrees by RA233. The significance of these changes relative to the effects of RA233 are discussed.