Cited by 20Cell death mechanisms and regulationPARP inhibition in cancer therapyAcute Ischemic Stroke Management

Endonuclease G does not play an obligatory role in poly(ADP-ribose) polymerase-dependent cell death after transient focal cerebral ischemia

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Xu, Zhenfeng, Zhang, Jian, David, Karen K., Yang, Zeng-Jin, Li, Xiaoling, Dawson, Ted M., Dawson, Valina L., Koehler, Raymond C.·2010·American Journal of Physiology-Regulatory, Integrative and Comparative Physiology

Abstract

Activation of poly(ADP-ribose) polymerase (PARP) and subsequent translocation of apoptosis-inducing factor contribute to caspase-independent neuronal injury from N-methyl-d-aspartate, oxygen-glucose deprivation, and ischemic stroke. Some studies have implicated endonuclease G in the DNA fragmentation associated with caspase-independent cell death. Here, we compared wild-type and endonuclease G null mice to investigate whether endonuclease G plays a role in the PARP-dependent injury that results from transient focal cerebral ischemia. Latex casts did not reveal differences in the cerebral arterial distribution territory or posterior communicating arterial diameter, and the decrease in laser-Doppler flux during middle cerebral artery occlusion was similar in wild-type and endonuclease G null mice. After 90 min of occlusion and 1 day of reperfusion, similar degrees of nuclear translocation of apoptosis-inducing factor and DNA degradation were evident in male wild-type and null mice. At 3 days of reperfusion, infarct volume and neurological deficit scores were not different between male wild-type and endonuclease G null mice or between female wild-type and endonuclease G null mice. These data demonstrate that endonuclease G is not required for the pathogenesis of transient focal ischemia in either male or female mice. Treatment with a PARP inhibitor decreased infarct volume and deficit scores equivalently in male wild-type and endonuclease G null mice, indicating that the injury in endonuclease G null mice remains dependent on PARP. Thus endonuclease G is not obligatory for executing PARP-dependent injury during ischemic stroke.

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Authors
Xu, Z., Zhang, J., David, K. K., Yang, Z.-J., Li, X., Dawson, T. M., Dawson, V. L., & Koehler, R. C.
Affiliations
  • Department of Anesthesiology/Critical Care Medicine,
  • Neuroregeneration and Stem Cell Programs, The Institute of Cell Engineering,
  • Johns Hopkins University (US)
Corresponding author
Koehler, Raymond C.
Venue
American Journal of Physiology-Regulatory, Integrative and Comparative Physiology
Published
2010-07
Volume
299
Issue
1
Pages
R215-R221
ISSN
  • 0363-6119 (ISSN-L)
  • 1522-1490
OpenAlex
W2122382169
Cited by
20
References
35
Citations by year
2025: 1 · 2023: 1 · 2022: 2 · 2021: 1 · 2020: 2 · 2019: 1 · 2018: 2 · 2017: 2 · 2016: 4 · 2014: 1 · 2013: 1 · 2012: 2
FWCI
0.39
Type
journal article
Language
en
Open access
Locations
  • American Journal of Physiology-Regulatory, Integrative and Comparative Physiology (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • American Heart Association
  • National Institute of Neurological Disorders and Stroke (NS067525, NS039148, P01NS039148)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
  • Health Sciences › Medicine › Oncology › PARP inhibition in cancer therapy
  • Health Sciences › Medicine › Epidemiology › Acute Ischemic Stroke Management
Keywords
endonuclease G, poly(ADP-ribose) polymerase, transient focal cerebral ischemia, ischemic stroke, apoptosis-inducing factor, DNA fragmentation, PARP inhibitors, infarct size, sex differences
MeSH terms
Adenosine Diphosphate Ribose, Animals, Ischemic Attack, Transient, Endodeoxyribonucleases, Enzyme Inhibitors, Female, Neurons, Poly Adenosine Diphosphate Ribose, Poly(ADP-ribose) Polymerases, Reperfusion, N-Methylaspartate, Cell Death, Mice, Knockout, Caspases, Infarction, Middle Cerebral Artery, Stroke, D-Aspartic Acid, Apoptosis Inducing Factor, Mice, DNA Fragmentation

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