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Cytogenetic adaptive response induced by pre-exposure in human lymphocytes and marrow cells of mice
1China Institute for Radiation Protection, Taiyuan, People's Republic of China.
Abstract:
The frequencies of chromosomal aberrations both in human lymphocytes and in mouse marrow cells exposed to low-level radiation were higher than in their unexposed controls. However, the frequencies of chromosomal aberrations in two kinds of cells pre-exposed to low-level radiation induced by a subsequent high dose of X-rays or gamma-rays were lower than those of the groups only exposed to high-level radiation. This implies that adaptive responses for cytogenetic indicators might be induced by pre-exposure to low-level radiation. The results also show the existence of possible variations between individual lymphocytes.
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