Radioprotective action of haematoporphyrin on X-irradiated trypsin |
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Authors: | V Pistoia Carmela Murolo |
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Institution: | (1) Department of Internal Medicine, University of Genova, 6, viale Benedetto XV, I-16132 Genova, (Italy);(2) Department of Radiology, University of Genova, Genova, (Italy) |
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Abstract: | Summary Dose-response curves were obtained for trypsin X-irradiated in aqueous solution (4.6×10–6M), alone or after incubation with haematoporphyrin (Hp). When trypsin was irradiated alone (exposure doses ranging from 10 to 25 kR) the exponential dose-response curve showed a D37 equal to 17200 R. When trypsin was incubated with Hp before irradiation a D37 equal to 61900 R was obtained, with a dose reduction factor of 3.6. Therefore in our experimental conditions Hp shows a highly significant radioprotective action.Acknowledgments. The authors wish to acknowledge the invaluable suggestions and discussion offered by Prof. G. Cittadini. |
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