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• W2014319455 startingPage "61" @default.
• W2014319455 abstract "Autophagy is a lysosome-dependent degradative pathway frequently activated in tumor cells treated with chemotherapy or radiation. PARP-1 has been implicated in different pathways leading to cell death and its inhibition potentiates chemotherapy-induced cell death. Whether PARP-1 participates in the cell's decision to commit to autophagy following DNA damage is still not known. To address this issue PARP-1 wild-type and deficient cells have been treated with a dose of doxorubicin that induces autophagy. Electron microscopy examination and GFP-LC3 transfection revealed autophagic vesicles and increased expression of genes involved in autophagy (bnip-3, cathepsin b and l and beclin-1) in wild-type cells treated with doxo but not in parp-1(-/-) cells or cells treated with a PARP inhibitor. Mechanistically the lack of autophagic features in PARP-1 deficient/PARP inhibited cells is attributed to prevention of ATP and NAD(+) depletion and to the activation of the key autophagy regulator mTOR. Pharmacological or genetical inhibition of autophagy results in increased cell death, suggesting a protective role of autophagy induced by doxorubicin. These results suggest that autophagy might be cytoprotective during the response to DNA damage and suggest that PARP-1 activation is involved in the cell's decision to undergo autophagy." @default.
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• W2014319455 date "2009-01-01" @default.
• W2014319455 modified "2023-10-13" @default.
• W2014319455 title "PARP-1 is involved in autophagy induced by DNA damage" @default.
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• W2014319455 doi "https://doi.org/10.4161/auto.5.1.7272" @default.
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