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- W2119645999 abstract "Exposure to ionizing radiation and hyperthermia results in important biological consequences, e.g. cell death, chromosomal aberrations, mutations, and DNA strand breaks. There is good evidence that the nucleus, specifically cellular DNA, is the principal target for radiation-induced cell lethality. DNA double-strand breaks (DSBs) are considered to be the most serious type of DNA damage induced by ionizing radiation. On the other hand, verifiable mechanisms which can lead to heat-induced cell death are damage to the plasma membrane and/or inactivation of heat-labile proteins caused by protein denaturation and subsequent aggregation. Recently, several reports have suggested that DSBs can be induced after hyperthermia because heat-induced phosphorylated histone H2AX (γ-H2AX) foci formation can be observed in several mammalian cell lines. In mammalian cells, DSBs are repaired primarily through two distinct and complementary mechanisms: non-homologous end joining (NHEJ), and homologous recombination (HR) or homology-directed repair (HDR). DNA-dependent protein kinase (DNA-PK) and ataxia-telangiectasia mutated (ATM) are key players in the initiation of DSB repair and phosphorylate and/or activate many substrates, including themselves. These phosphorylated substrates have important roles in the functioning of cell cycle checkpoints and in cell death, as well as in DSB repair. Apoptotic cell death is a crucial cell suicide mechanism during development and in the defense of homeostasis. If DSBs are unrepaired or misrepaired, apoptosis is a very important system which can protect an organism against carcinogenesis. This paper reviews recently obtained results and current topics concerning the role of DNA-PK and ATM in heat- or radiation-induced apoptotic cell death." @default.
- W2119645999 created "2016-06-24" @default.
- W2119645999 creator A5015575713 @default.
- W2119645999 date "2010-01-01" @default.
- W2119645999 modified "2023-10-02" @default.
- W2119645999 title "Involvement of DNA-PK and ATM in Radiation- and Heat-induced DNA Damage Recognition and Apoptotic Cell Death" @default.
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- W2119645999 doi "https://doi.org/10.1269/jrr.10039" @default.
- W2119645999 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/20814172" @default.
- W2119645999 hasPublicationYear "2010" @default.
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