Abstract
Apoptotic and necrotic cell death are well characterized and are influenced by intracellular ATP levels. Poly(ADP-ribose) polymerase (PARP), a nuclear enzyme activated by DNA strand breaks, physiologically participates in DNA repair. Overactivation of PARP after cellular insults can lead to cell death caused by depletion of the enzyme’s substrate β-nicotinamide adenine dinucleotide and of ATP. In this study, we have differentially elicited apoptosis or necrosis in mouse fibroblasts. Fibroblasts from PARP-deficient (PARP −/− ) mice are protected from necrotic cell death and ATP depletion but not from apoptotic death. These findings, together with cell death patterns in PARP −/− animals receiving other types of insults, indicate that PARP activation is an active trigger of necrosis, whereas other mechanisms mediate apoptosis.
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Dates
Type | When |
---|---|
Created | 23 years, 1 month ago (July 26, 2002, 10:39 a.m.) |
Deposited | 3 years, 4 months ago (April 13, 2022, 4:19 p.m.) |
Indexed | 4 days, 1 hour ago (Aug. 30, 2025, 12:40 p.m.) |
Issued | 25 years, 9 months ago (Nov. 23, 1999) |
Published | 25 years, 9 months ago (Nov. 23, 1999) |
Published Online | 25 years, 9 months ago (Nov. 23, 1999) |
Published Print | 25 years, 9 months ago (Nov. 23, 1999) |
@article{Ha_1999, title={Poly(ADP-ribose) polymerase is a mediator of necrotic cell death by ATP depletion}, volume={96}, ISSN={1091-6490}, url={http://dx.doi.org/10.1073/pnas.96.24.13978}, DOI={10.1073/pnas.96.24.13978}, number={24}, journal={Proceedings of the National Academy of Sciences}, publisher={Proceedings of the National Academy of Sciences}, author={Ha, Hyo Chol and Snyder, Solomon H.}, year={1999}, month=nov, pages={13978–13982} }