Genome instability transmission in offspring was analyzed in order to evaluate the risk of delayed genetic effects of exposure in 95 family triplets in which only fathers experienced prolonged occupational radiation exposure. The mean total preconceptive absorbed dose (TPAD) of external gamma radiation in the paternal gonads was 1.65 ± 0.080 Gy (dose range of 0.57–5.70 Gy), and the mean TPAD of internal alpha radiation from incorporated plutonium-239 in the gonads was 0.0015 ± 0.0003 Gy (dose range 0.000–0.015 Gy). The control group consisted of 50 family triplets in which parents were not occupationally exposed. The mutation process was studied using PCR based on hypervariable minisatellite marker CEB1 (chromosome 2, 2q37.3). The paternal type of inheritance of mutations for minisatellite CEB1 was found in 80% of cases. The analysis revealed a statistically significant increase in minisatellite CEB1 mutations in the common group of families in which fathers experienced prolonged occupational radiation exposure and in the group of families in which fathers were exposed to radiation in a dosage range of 0.5–1.0 Gy as compared to the control, reaching a significance level of p = 0.109 and p = 0.058, respectively. The dose threshold of mutation detection in the offspring of Mayak PA workers was estimated.
Russian Journal of Genetics – Springer Journals
Published: Nov 15, 2014
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