Cited by 34Redox biology and oxidative stressAntioxidant Activity and Oxidative StressCancer and biochemical research

Levels of DNA damage are unaltered in mice overexpressing human catalase in nuclei

Schriner, Samuel E, Ogburn, Charles E, Smith, Annette C, Newcomb, Terry G, Ladiges, Warren C, Dollé, Martijn E.T, Vijg, Jan, Fukuchi, Ken-Ichiro +1 more·2000·Free Radical Biology and Medicine

Abstract

Two types of transgenic mice were generated to evaluate the role of hydrogen peroxide in the formation of nuclear DNA damage. One set of lines overexpresses wild-type human catalase cDNA, which is localized to peroxisomes. The other set overexpresses a human catalase construct that is targeted to the nucleus. Expression of the wild-type human catalase transgene was found in liver, kidney, skeletal muscle, heart, spleen, and brain with muscle and heart exhibiting the highest levels. Animals containing the nuclear-targeted construct had a similar pattern of expression with the highest levels in muscle and heart, but with lower levels in liver and spleen. In these animals, immunofluorescence detected catalase present in the nuclei of kidney, muscle, heart, and brain. Both types of transgenic animals had significant increases of catalase activities compared to littermate controls in most tissues examined. Despite enhanced activities of catalase, and its presence in the nucleus, there were no changes in levels of 8OHdG, a marker of oxidative damage to DNA. Nor were there differences in mutant frequencies at a Lac Z reporter transgene. This result suggests that in vivo levels of H(2)O(2) may not generate 8OHdG or other types of DNA damage. Alternatively, antioxidant defenses may be optimized such that additional catalase is unable to further protect nuclear DNA against oxidative damage.

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Crossref · 10.1016/s0891-5849(00)00352-x

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  • When human catalase is localized to peroxisomes or targeted to the nucleus in mice, no detectable reduction in mtDNA damage or significant extension of lifespan are observed.

    “Interestingly, when human catalase is localized to peroxisomes or targeted to the nucleus in mice, no detectable reduction in mtDNA damage or significant extension of lifespan are observed (Schriner and Linford, 2006; Schriner et al., 2000).”

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Authors
Schriner, S. E., Ogburn, C. E., Smith, A. C., Newcomb, T. G., Ladiges, W. C., Dollé, M. E. T., Vijg, J., Fukuchi, K.-I., & Martin, G. M.
Affiliations
  • University of Washington (US)
  • The University of Texas at San Antonio (US)
  • University of Alabama (US)
Corresponding author
Martin, George M
Venue
Free Radical Biology and Medicine
Publisher
Elsevier BV
Published
2000-10
Volume
29
Issue
7
Pages
664-673
ISSN
0891-5849 (ISSN-L)
OpenAlex
W2171522573
Cited by
34
References
27
Citations by year
2017: 1 · 2016: 1 · 2015: 1 · 2014: 1 · 2013: 3 · 2012: 2
FWCI
0.72
Type
journal article
Language
en
Open access
closed
Locations
  • Free Radical Biology and Medicine (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Institute on Aging (AG 00057, P01AG001751, AG01751)
  • National Institute of General Medical Sciences (GM07735, T32GM007735)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
  • Health Sciences › Medicine › Biochemistry › Antioxidant Activity and Oxidative Stress
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cancer and biochemical research
Keywords
catalase, hydrogen peroxide, nuclear DNA damage, 8-oxoguanine, oxidative DNA damage, transgenic mice, antioxidant defense, peroxisomes, tissue-specific gene expression
MeSH terms
8-Hydroxy-2'-Deoxyguanosine, Animals, Brain, Catalase, Cell Nucleus, Crosses, Genetic, Deoxyguanosine, DNA Damage, Humans, Kidney, Mice, Inbred C57BL, Mice, Inbred Strains, Mice, Transgenic, Myocardium, Biomarkers, DNA, Complementary, Oxidative Stress, Muscle, Skeletal, Peroxisomes, Mice

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