Abstract
Changes of genome stability in hippocampal cells of male rats with hereditary high and low thresholds of nervus tibialis response to electric stimuli (HT and LT strains, respectively) were studied in unstressed and stressed animals. HT and LT originated from Wistar strain, males of which were also used as a control. The comet assay was used after prolonged emotional painful stressor action. There were no interstrain differences in the spontaneous percentage of DNA in comet tails (tDNA). However, the prolonged emotional pain stressor induced genome instability differently in animals of different strains. The highest level of DNA damage in hippocampal cells was shown in highly sensitive animals of LT strain. Males of Wistar strain had intermediate levels of tDNA, while HT animals had the lowest stress reactivity.
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