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Age-associated changes in Ca(2+)-ATPase and oxidative damage in sarcoplasmic reticulum of rat heart
E. Babušíková, J. Lehotský, D. Dobrota, P. Račay, P. Kaplán
Language English Country Czech Republic
Document type Journal Article, Research Support, Non-U.S. Gov't
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- MeSH
- Calcium-Transporting ATPases metabolism MeSH
- Rats MeSH
- Cells, Cultured MeSH
- Myocardium enzymology pathology MeSH
- Oxidation-Reduction MeSH
- Oxidative Stress physiology MeSH
- Rats, Wistar MeSH
- Sarcoplasmic Reticulum enzymology MeSH
- Aging pathology physiology MeSH
- Animals MeSH
- Check Tag
- Rats MeSH
- Male MeSH
- Animals MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
Altered Ca(2+) handling may be responsible for the development of cardiac contractile dysfunctions with advanced age. In the present study, we investigated the roles of oxidative damage to sarcoplasmic reticulum (SR) and expression of Ca(2+)-ATPase (SERCA 2a) and phospholamban in age-associated dysfunction of cardiac SR. SR vesicles were prepared from hearts of 2-, 6-, 15-, and 26-month-old Wistar rats. Although activity of Ca(2+)-ATPase decreased with advancing age, no differences in relative amounts of SERCA 2a and phospholamban protein were observed. On the other hand, significant accumulation of protein oxidative damage occurred with aging. The results of this study suggest that age-related alteration in Ca(2+)-ATPase activity in the rat heart is not a consequence of decreased protein levels of SERCA 2a and phospholamban, but could arise from oxidative modifications of SR proteins. Cellular oxidative damage caused by reactive oxygen species could contribute to age-related alternations in myocardial relaxation.
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