Potassium bromate, a potent DNA oxidizing agent, exacerbates germline repeat expansion in a fragile X premutation mouse model.
Potassium bromate, a potent DNA oxidizing agent, exacerbates germline repeat expansion in a fragile X premutation mouse model.
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DOI:
10.1002/humu.21237
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发表时间:
2010-05
期刊:
影响因子:
3.9
通讯作者:
Usdin, Karen
中科院分区:
文献类型:
--
作者:
Entezam, Ali;Lokanga, Adihe Rachel;Le, Wei;Hoffman, Gloria;Usdin, Karen
关键词:
Tandem repeat expansion is responsible for the Repeat Expansion Diseases, a group of human genetic disorders that includes Fragile X syndrome. FXS results from expansion of a premutation (PM) allele having 55–200 CGG•CCG-repeats in the 5’ UTR of the FMR1 gene. The mechanism of expansion is unknown. We have treated FX PM mice with potassium bromate (KBrO3), a potent DNA oxidizing agent. We then monitored the germline and somatic expansion frequency in the progeny of these animals. We show here that KBrO3 increased both the level of 8-oxoG in the oocytes of treated animals and the germline expansion frequency. Our data thus suggest that oxidative damage may be a factor that could affect expansion risk in humans.
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