[Double-strand DNA breaks induction and repair in human blood lymphocytes irradiated with adapting dose]статья

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Дата последнего поиска статьи во внешних источниках: 12 июля 2017 г.

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[1] [double-strand dna breaks induction and repair in human blood lymphocytes irradiated with adapting dose] / A. N. Osipov, E. I. Lizunova, N. I. Vorob’eva, I. I. Pelevina // Радиационная биология. Радиоэкология. — 2009. — Vol. 49, no. 1. — P. 42–45. Using a DNA-comet assay was shown that irradiation of human blood lymphocytes at G1 cell cycle with a low conditioning dose (5 cGy) induces an adaptive response (AR) manifested in reduction of the double-strand DNA (DSB) amount induced by challenging dose at 10 Gy. 24 h after conditioning irradiation (48 h after PHA addition) in cells irradiated at both conditioning and challenging doses a relative DBS amount was approximately 24% less in comparison to versus a control irradiated at challenging dose only. 48 h after adapting irradiation this index increased to approximately 35%, while 72 h after was decreased to approximately 29%. AR observed by us during 72 h after its induction did not accompanied by statistically significant changes in DBS repair enhancing. It is possible to assume that basic role in AR forming in lymphocytes under experimental conditions used by us playing the processes preventing radiation-induced DBS formation (antioxidant defense system activation, chromatin conformation changes ets).

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