Magnetic field exposure enhances DNA repair through the induction of DnaK/J synthesis

FEBS Letters

Chow, King-Chuen¹  Tung, Wai Lin¹ 

[1] Department of Biochemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, PR China

关键词: Magnetic field;    DNA repair;    Heat shock protein;    DnaK;    Hydroxylamine;   

DOI  :  10.1016/S0014-5793(00)01822-6

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

In contrast to the common impression that exposure to a magnetic field of low frequency causes mutations to organisms, we have demonstrated that a magnetic field can actually enhance the efficiency of DNA repair. Using Escherichia coli strain XL-1 Blue as the host and plasmid pUC8 that had been mutagenized by hydroxylamine as the vector for assessment, we found that bacterial transformants that had been exposed to a magnetic field of 50 Hz gave lower percentages of white colonies as compared to transformants that had not been exposed to the magnetic field. This result was indicative that the efficiency of DNA repair had been improved. The improvement was found to be mediated by the induced overproduction of heat shock proteins DnaK/J (Hsp70/40).

【 授权许可】

Unknown