Cardiac myosin heavy chains in mice treated with N-nitro-l-arginine methyl ester and thyroxine
Comparative Clinical Pathology, ISSN: 1618-565X, Vol: 23, Issue: 5, Page: 1639-1644
2014
- 1Citations
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Article Description
The aim of this study was to evaluate the effect of N-nitro-l-arginine methyl ester and thyroxine on the distribution of cardiac myosin heavy chains in mice. Myocardial hypertrophy was induced in mice by intraperitoneal injection with l-thyroxine and oral administration of N-nitro-l-arginine methyl ester (l-NAME). Mice were randomly allocated into five groups: control, high and low doses of thyroxine and L-NAME. Heart weight divided by body weight was calculated and used as indicator for cardiac hypertrophy. Myosin heavy chains (MHCs) were separated using 4 % polyacrylamide gel electrophoresis. Hypertrophy was induced in mice treated with thyroxine and a high dose of l-NAME and was accompanied by a shift toward α-MHC in thyroxine-treated mice and β-MHC in l-NAME-treated mice. There was no difference with respect to MHC between a low dose of l-NAME and a high dose; however, low doses of l-NAME did not result in cardiac hypertrophy. In conclusion, l-NAME treatment changes the MHC distribution from α- toward β-MHC and this transition in the MHCs occurs before heart hypertrophy. Further investigations are needed to determine whether l-NAME treatment causes this transition via a direct or indirect effect on the heart muscles.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84887264750&origin=inward; http://dx.doi.org/10.1007/s00580-013-1838-x; http://link.springer.com/10.1007/s00580-013-1838-x; http://link.springer.com/content/pdf/10.1007/s00580-013-1838-x; http://link.springer.com/content/pdf/10.1007/s00580-013-1838-x.pdf; http://link.springer.com/article/10.1007/s00580-013-1838-x/fulltext.html; https://dx.doi.org/10.1007/s00580-013-1838-x; https://link.springer.com/article/10.1007/s00580-013-1838-x
Springer Science and Business Media LLC
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