Gender difference in smoking effect on chromosome sensitivity to gamma radiation in a healthy population.

Published

Journal Article

In the general population, there is variation in radiosensitivity associated with cancer risk. However, data on the role of epigenetic factors in the variation of radiosensitivity are scarce. Thus we investigated the effects of smoking and age on the radiosensitivity of human lymphocytes by measuring the frequency of chromosome aberrations after in vitro exposure to gamma rays in peripheral lymphocytes from 441 healthy subjects (18-95 years old). We analyzed the frequency of both spontaneous (baseline) and in vitro gamma-ray-induced (1.5 Gy) chromatid breaks in 50 well-spread metaphases per subject. The overall mean frequencies of spontaneous and induced breaks were 0.02 and 0.45 per cell, respectively. The mean frequency of induced breaks was significantly higher in men than in women (P = 0.03) but did not differ by age or ethnicity. Donors who had ever smoked showed a small but significantly increased frequency of induced breaks (mean = 0.47) compared to nonsmokers (mean = 0.41; P = 0.005). Further stratification and multivariate analyses revealed that the smoking effect was more pronounced in men than in women. These findings support a smoking effect on radiosensitivity in a healthy population, particularly in men. Therefore, when evaluating the association between radiosensitivity and susceptibility to smoking-related cancers, the effect of smoking should be taken into account.

Full Text

Duke Authors

Cited Authors

  • Wang, LE; Bondy, ML; de Andrade, M; Strom, SS; Wang, X; Sigurdson, A; Spitz, MR; Wei, Q

Published Date

  • July 2000

Published In

Volume / Issue

  • 154 / 1

Start / End Page

  • 20 - 27

PubMed ID

  • 10856961

Pubmed Central ID

  • 10856961

International Standard Serial Number (ISSN)

  • 0033-7587

Language

  • eng

Conference Location

  • United States