Radical mediators and mitogen-activated protein kinase signaling in oxygen-dependent radiosensitivity of human tumor cell lines.


Oxygen enhancement of tumor radiosensitivity is attributed to DNA damage by reactive oxygen species. The mechanism remains unclear but may involve mitochondria as major sources of oxygen and nitrogen radicals as well as central effectors of energy homeostasis and apoptosis. Here we used dihydrorhodamine and 2',7'-dichlorodihydrofluorescein to compare… (More)


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