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Chromosome aberrations induced by protons up to 31 MeV in cultured human cells

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Summary

Chromosome aberrations were induced in cultured human cells by proton beams of 31, 12, and 8 MeV. The frequencies of isocromatid breaks and dicentrics have been analysed as a function of proton energy and dose. Both effects are largely dependent on proton energy; isochromatid breaks increase linearly with the dose, whereas dicentrics show a definite parabolic behaviour. The experimental data were fitted to the analytic formY = KD n andY = αD +βD 2 and the best fitted values of the parameters are reported and discussed. The values of RBE for the isochromatid breaks are in the ratio 1.7: 1.3: 1 for 8, 12, and 31 MeV respectively.

In the case of the dicentrics the RBE values are dose-dependent function of the typeCD −n. The three distributions of dicentrics among the cells do not fit a Poisson distribution.

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Authors and Affiliations

  1. Gruppo di Fisica Medica - Istituto di Fisica, Università degli Studi di Milano and Istituto di Fisica Nucleare - Sezione di Milano, Via Celoria 16, I-20133, Milano, Italy

    D. Bettega, T. Pelucchi & L. Tallone Lombardi

  2. Istituto di Biologia Generale, Facoltà di Medicina, Università degli Studi di Milano, Via Viotti 3, I-20133, Milano, Italy

    S. Dubini & A. M. Fuhrman Conti

Authors
  1. D. Bettega
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  2. S. Dubini
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  3. A. M. Fuhrman Conti
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  4. T. Pelucchi
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  5. L. Tallone Lombardi
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Supported by a grant of CNR no 790067996 of the Finalized Project “Tumour Growth Control201D; Consiglio Nazionale delle Ricerche, Italy

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Bettega, D., Dubini, S., Fuhrman Conti, A.M. et al. Chromosome aberrations induced by protons up to 31 MeV in cultured human cells. Radiat Environ Biophys 19, 91–100 (1981). https://doi.org/10.1007/BF01324225

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  • DOI: https://doi.org/10.1007/BF01324225

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