Avtor/Urednik | Gulati, J; Akella, AB; Nikolić, SD; Starc, V; Siri, F | |
Naslov | Shifts in contractile regulatory protein subunits troponin T and troponin I in cardiac hypertrophy | |
Tip | članek | |
Vir | Biochem Biophys Res Commun | |
Vol. in št. | Letnik 202, št. 1 | |
Leto izdaje | 1994 | |
Obseg | str. 384-90 | |
Jezik | eng | |
Abstrakt | To examine the molecular basis of hypertrophied heart failure, we investigated the changes in cardiac contractile regulatory proteins. The guinea pigs were subjected to chronic pressure overload with aortic banding to induce ventricular hypertrophy, and in-situ pressure-volume relations were recorded together with biochemical characterizations to ascertain the contractile modifications. Immunoblots of left and right ventricular samples revealed four distinct troponin T isoforms, which underwent alterations during hypertrophy. The higher molecular weight bands TnT1 and TnT2 shifted towards the lower molecular weight isoforms TnT3 and TnT4. For TnI, a single prominent band was detected, whose intensity also increased with pump failure. The findings provide the first direct evidence of TnT and TnI shifts in an experimentally induced hypertrophied heart failure and has novel mechanistic implications for the future studies. | |
Deskriptorji | HEART HEART HYPERTROPHY MYOCARDIUM TROPONIN BIOLOGICAL MARKERS BLOTTING, WESTERN DIASTOLE ELECTROPHORESIS, POLYACRYLAMIDE GEL GUINEA PIGS HEART HEART HYPERTROPHY MACROMOLECULAR SYSTEMS MYOCARDIAL CONTRACTION REFERENCE VALUES SYSTOLE TROPONIN VENTRICULAR FUNCTION, LEFT |