Endogenous mitochondrial oxidative stress in MnSOD deficient mouse embryonic fibroblasts promotes mitochondrial DNA glycation

Journal article


Publication Details

Author(s): Weigel I, Pischetsrieder M, Breyer V, Huang TT
Journal: Free Radical Biology and Medicine
Publisher: Elsevier
Publication year: 2012
Volume: 52
Pages range: 1744-1749
ISSN: 0891-5849


Abstract


The accumulation of somatic mutations in mitochondrial DNA (mtDNA) induced by reactive oxygen species (ROS) is regarded as a major contributor to aging and age-related degenerative diseases. ROS have also been shown to facilitate the formation of certain advanced glycation end-products (AGEs) in proteins and DNA and N 2-carboxyethyl-2′-deoxyguanosine (CEdG) has been identified as a major DNA-bound AGE. Therefore, the influence of mitochondrial ROS on the glycation of mtDNA was investigated in primary embryonic fibroblasts derived from mutant mice (Sod2 -/+) deficient in the mitochondrial antioxidant enzyme manganese superoxide dismutase. In Sod2 -/+ fibroblasts vs wild-type fibroblasts, the CEdG content of mtDNA was increased from 1.90 ± 1.39 to 17.14 ± 6.60 pg/μg DNA (p<0.001). On the other hand, the CEdG content of nuclear DNA did not differ between Sod2 +/+ and Sod2 -/+ cells. Similarly, cytosolic proteins did not show any difference in advanced glycation end-products or protein carbonyl contents between Sod2 +/+ and Sod2 -/+. Taken together, the data suggest that mitochondrial oxidative stress specifically promotes glycation of mtDNA and does not affect nuclear DNA or cytosolic proteins. Because DNA glycation can change DNA integrity and gene functions, glycation of mtDNA may play an important role in the decline of mitochondrial functions. © 2012 Elsevier Inc. All rights reserved.



FAU Authors / FAU Editors

Breyer, Viola
Graduiertenzentrum der FAU
Pischetsrieder, Monika Prof. Dr.
Lehrstuhl für Lebensmittelchemie (Henriette-Schmidt-Burkhardt Lehrstuhl)
Weigel, Ingrid
Lehrstuhl für Lebensmittelchemie (Henriette-Schmidt-Burkhardt Lehrstuhl)


Additional Organisation
Emil-Fischer-Zentrum (Emil Fischer Center)


How to cite

APA:
Weigel, I., Pischetsrieder, M., Breyer, V., & Huang, T.-T. (2012). Endogenous mitochondrial oxidative stress in MnSOD deficient mouse embryonic fibroblasts promotes mitochondrial DNA glycation. Free Radical Biology and Medicine, 52, 1744-1749. https://dx.doi.org/10.1016/j.freeradbiomed.2012.02.021

MLA:
Weigel, Ingrid, et al. "Endogenous mitochondrial oxidative stress in MnSOD deficient mouse embryonic fibroblasts promotes mitochondrial DNA glycation." Free Radical Biology and Medicine 52 (2012): 1744-1749.

BibTeX: 

Last updated on 2018-19-04 at 02:43