Oxidative stress--induced single-strand breaks in chromosomal telomeres of human retinal pigment epithelial cells in vitro.

Abstract

PURPOSE To demonstrate that chronic hyperoxia induces single-stranded breaks in chromosomal telomeres as a measure of oxidative DNA damage in cultured RPE cells. METHODS RPE340 cells were cultured in 40% and 20% (control) O(2). DNA damage was assessed by mean terminal restriction fragment (TRF) length, and the S1 nuclease assay was used to determine the… (More)

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