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Endogenous endonuclease-induced DNA fragmentation: an early event in cell-mediated cytolysis.

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Duke, R C, Chervenak, R, Cohen, J J·1983·Proceedings of the National Academy of Sciences

Abstract

Within minutes of exposure of target cells to cytotoxic T lymphocytes, their nuclear DNA begins to be fragmented. This phenomenon precedes 51Cr release by at least an hour. DNA fragmentation occurs only when appropriately sensitized cytotoxic T cells are used and is not merely a result of cell death because killing of target cells by heating, freeze/thawing, or lysing with antibody and complement did not yield DNA fragments. Agarose gel electrophoresis of target cell DNA showed discrete multiples of an approximately 200-base-pair subunit, suggesting that fragmentation was the result of activation of a specific endonuclease. A similar pattern of DNA fragments is observed during glucocorticoid-induced killing of mouse thymocytes. The endonuclease in that case is inhibited by zinc ions, and we find that Zn2+ also inhibits DNA fragmentation and 51Cr release induced by cytotoxic T cells, suggesting a final common biochemical pathway for both types of cell death.

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Metadata

Authors
Duke, R. C., Chervenak, R., & Cohen, J. J.
Venue
Proceedings of the National Academy of Sciences
Published
1983-10
Volume
80
Issue
20
Pages
6361-6365
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W1991605327
Cited by
606
References
0
FWCI
2.91
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Endogenous endonuclease-induced DNA fragmentation: an early event in cell-mediated cytolysis. https://app.cochat.ai/papers/10.1073/pnas.80.20.6361
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Duke, R. C., Chervenak, R., & Cohen, J. J. (1983). Endogenous endonuclease-induced DNA fragmentation: an early event in cell-mediated cytolysis. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.80.20.6361

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.