Changes in cAMP concentrations during chronic cardiac hypertrophy
- 1 November 1978
- journal article
- research article
- Published by Springer Nature in Basic Research in Cardiology
- Vol. 73 (6) , 648-655
- https://doi.org/10.1007/bf01906802
Abstract
Mild pulmonic stenosis in the dog, where right ventricular peak systolic pressure was increased approximately 150% at the time of sacrifice, induced 100% or more increase in right ventricular free wall weight by 3 weeks postoperative. Accompanying cardiac hypertrophy at these postoperative times, there was a decrease in both tissue PO2 levels and cAMP concentrations in the hemodynamically stressed ventricle, the right ventricle. Myosin ATPase activity was elevated as well as the velocity of contractile element shortening. The hemodynamically nonstressed left ventricle did not hypertrophy at these early postoperative times. 3 Wochen nach Operation verursachte eine milde Stenosierung der Pulmonalarterie mit Steigerung der systolischen Spitzendrucke im rechten Ventrikel um 150% beim Hund einen 100% igen oder stärkeren Anstieg im Gewicht der freien Wand des rechten Ventrikels. Als Begleiterscheinung der Herzhypertrophie ergab sich um diese Zeit ein Rückgang sowohl des Gewebe-Sauerstoffpartialdruckes als auch der Konzentration von cAMP im hämodynamisch mehrbeanspruchten (rechten) Ventrikel. Die ATPase-Aktivität von Myosin war erhöht, desgleichen die Verkürzungsgeschwindigkeit des kontraktilen Elements. Der hämodynamisch nicht mehrbeanspruchte linke Ventrikel zeigte in diesem frühen postoperativen Stadium keine Hypertrophie.This publication has 16 references indexed in Scilit:
- Alteration in canine cardiac basal levels of cAMP and cGMP, and elevated tissue P?2 levels, induced by coronary ligationJournal of Molecular and Cellular Cardiology, 1978
- Protein synthesis during right-ventricular hypertrophy after pulmonary-artery stenosis in the dogBiochemical Journal, 1977
- Myosin Characteristics and Immunological Properties of Myocardial TissuePublished by Springer Nature ,1977
- Comparison of mild vs severe pressure overload on the enzymatic activity of myosin in the canine ventriclesBiochemical Medicine, 1975
- Changes in intramyocardial ST segment voltage and gas tensions with regional myocardial ischemia in the dog.Circulation Research, 1975
- Chronological effects of mild pressure overload on myosin ATPase activity in the canine right ventricleJournal of Molecular and Cellular Cardiology, 1975
- Normal Contractile State of Hypertrophied Myocardium after Pulmonary Artery Constriction in the CatJournal of Clinical Investigation, 1974
- Regulatory Properties of Myocardial MyosinProceedings of the National Academy of Sciences, 1973
- Myosin chains of myocardial tissue — I. Purification and immunological properties of myosin heavy chainsBiochemical and Biophysical Research Communications, 1973
- Polyamines and noradrenaline following myocardial hypertrophyJournal of Molecular and Cellular Cardiology, 1971