2000
DOI: 10.1016/s0891-5849(00)00352-x
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Levels of dna damage are unaltered in mice overexpressing human catalase in nuclei

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Cited by 32 publications
(19 citation statements)
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“…With the potential targets of free radical damage in mind, catalase was overexpressed in mice with a targeting signal for the peroxisome (endogenous sequence, PCAT), nucleus (NCAT), or mitochondrion (MCAT), under the control of a h actin promoter, which achieved high levels of expression, particularly in heart and muscle. Nuclear localization of NCAT (13) and mitochondrial localization of MCAT (14) was confirmed by immunofluorescence. In the MCAT animals, expression of mitochondrial catalase was robust but mosaic in nature (Fig.…”
Section: Introductionmentioning
confidence: 77%
“…With the potential targets of free radical damage in mind, catalase was overexpressed in mice with a targeting signal for the peroxisome (endogenous sequence, PCAT), nucleus (NCAT), or mitochondrion (MCAT), under the control of a h actin promoter, which achieved high levels of expression, particularly in heart and muscle. Nuclear localization of NCAT (13) and mitochondrial localization of MCAT (14) was confirmed by immunofluorescence. In the MCAT animals, expression of mitochondrial catalase was robust but mosaic in nature (Fig.…”
Section: Introductionmentioning
confidence: 77%
“…GPX1 −/− ,28, 252 SOD2 +/− ,240 extracellular SOD −/− 255, 256 and MSRB −/− 257 knockout murine models show no effect on lifespan. Similarly, transgenic animal models overexpressing RONS protective enzymes including SOD1 Tg ,26 SOD2 Tg ,24 MSRA Tg ,258 mice overexpressing human CAT in nuclei (nCAT Tg )259 and peroxisomal targeted CAT (pCAT Tg ) (the natural site of CAT)260 have failed to provide evidence of increased lifespan, indicating that RONS are not the fundamental determinants of lifespan. However, GPX4 +/− ,261 TRX1 Tg 262 and the mitochondrial CAT overexpressing (mCAT Tg ) mouse model263 showed ~7%, ~14% and ~21% increases in lifespan, respectively, which may provide support for the theory of oxidative damage in ageing.…”
Section: Non‐enzymatic Key Antioxidants That Contribute To the Maintementioning
confidence: 99%
“…The mtDNA genes have a much higher mutation rate than nDNA genes [Nachman et al, 1996;Schriner et al, 2000]. One factor contributing to the high mtDNA mutation rate is the proximity of mtDNA to mitochondrial ROS production.…”
Section: Mitochondrial Geneticsmentioning
confidence: 99%