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- W2072039947 abstract "The number of neurodegenerative disorders associated with the expansion of DNA repeats, currently about 18, continues to increase as additional diseases caused by this novel type of mutation are identified. Typically, expanded repeats are biased toward further expansion upon intergenerational transmission, and disease symptoms show an earlier age of onset and greater severity as the length of the triplet repeat tract increases. Most diseases exhibit progressive neurological and/or muscular degeneration that can lead to total disability and death. As yet, no treatment exists for the genetic basis of any repeat disease. Given that the severity of these diseases is related to repeat tract length, reducing repeat lengths might delay the onset and reduce disease severity. Here, we test the hypothesis that the introduction of damage into DNA, which results in subsequent repair events, can lead to an increased rate of repeat deletion. Applying a sensitive genetic assay in Escherichia coli [Mut. Res. 502 (2002) 25], we demonstrate that certain DNA damaging agents, including EMS, ENU, UV light, and anticancer agents mitomycin C, cisplatin, and X-rays increase the rate of deletion of (CTG).(CAG) repeats in a length and orientation dependent fashion. In addition, oxidative damage to DNA also increases the deletion rate of repeats. These results suggest that a chemotherapeutic approach to the reduction in triplet repeat length may provide one possible rationale to slow, stop, or reverse the progression of these diseases." @default.
- W2072039947 created "2016-06-24" @default.
- W2072039947 creator A5042637328 @default.
- W2072039947 creator A5091733532 @default.
- W2072039947 date "2002-10-01" @default.
- W2072039947 modified "2023-09-29" @default.
- W2072039947 title "Chemotherapeutically induced deletion of expanded triplet repeats" @default.
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- W2072039947 doi "https://doi.org/10.1016/s0027-5107(02)00190-2" @default.
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