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| Registros recuperados: 11 | |
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| Evangelista,F.S.; Brum,P.C.; Krieger,J.E.. |
| Exercise training associated with robust conditioning can be useful for the study of molecular mechanisms underlying exercise-induced cardiac hypertrophy. A swimming apparatus is described to control training regimens in terms of duration, load, and frequency of exercise. Mice were submitted to 60- vs 90-min session/day, once vs twice a day, with 2 or 4% of the weight of the mouse or no workload attached to the tail, for 4 vs 6 weeks of exercise training. Blood pressure was unchanged in all groups while resting heart rate decreased in the trained groups (8-18%). Skeletal muscle citrate synthase activity, measured spectrophotometrically, increased (45-58%) only as a result of duration and frequency-controlled exercise training, indicating that endurance... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Exercise training; Swimming; Cardiac hypertrophy; Mice; Myocardium. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003001200018 |
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| Feng,H.J.; Ouyang,W.; Liu,J.H.; Sun,Y.G.; Hu,R.; Huang,L.H.; Xian,J.L.; Jing,C.F.; Zhou,M.J.. |
| Hypertrophy is a major predictor of progressive heart disease and has an adverse prognosis. MicroRNAs (miRNAs) that accumulate during the course of cardiac hypertrophy may participate in the process. However, the nature of any interaction between a hypertrophy-specific signaling pathway and aberrant expression of miRNAs remains unclear. In this study, Spague Dawley male rats were treated with transverse aortic constriction (TAC) surgery to mimic pathological hypertrophy. Hearts were isolated from TAC and sham operated rats (n=5 for each group at 5, 10, 15, and 20 days after surgery) for miRNA microarray assay. The miRNAs dysexpressed during hypertrophy were further analyzed using a combination of bioinformatics algorithms in order to predict possible... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cardiac hypertrophy; Signaling pathway; Biomarker. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2014000500361 |
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| Nunes,A.D.C.; Souza,A.P.S.; Macedo,L.M.; Alves,P.H.; Pedrino,G.R.; Colugnati,D.B.; Mendes,E.P.; Santos,R.A.S.; Castro,C.H.. |
| This study investigated the influence of antihypertensive drugs, such as angiotensin-converting enzyme inhibitors (ACEIs), AT1 receptor blockers (ARBs), voltage-gated L-type calcium channel blockers, and mineralocorticoid receptor antagonists (MRAs), on the effects of angiotensin-(1-7) [Ang-(1-7)] on aorta and coronary arteries from pressure-overloaded rats. Pressure overload was induced by abdominal aortic banding (AB). To evaluate the role of antihypertensive drugs on the effect of Ang-(1-7), AB male Wistar rats weighing 250–300 g were treated with vehicle or low doses (5 mg·kg-1·day-1, gavage) of losartan, captopril, amlodipine, or spironolactone. Isolated aortic rings and isolated perfused hearts under constant flow were used to evaluate the effect of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Angiotensin-(1-7); Renin-angiotensin system; Coronary artery; Antihypertensive drugs; Cardiac hypertrophy. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2017000400604 |
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| Rocha,W.A.; Lunz,W.; Baldo,M.P.; Pimentel,E.B.; Dantas,E.M.; Rodrigues,S.L.; Mill,J.G.. |
| Angiotensin-converting enzyme inhibitors reduce blood pressure and attenuate cardiac and vascular remodeling in hypertension. However, the kinetics of remodeling after discontinuation of the long-term use of these drugs are unknown. Our objective was to investigate the temporal changes occurring in blood pressure and vascular structure of spontaneously hypertensive rats (SHR). Captopril treatment was started in the pre-hypertensive state. Rats (4 weeks) were assigned to three groups: SHR-Cap (N = 51) treated with captopril (1 g/L) in drinking water from the 4th to the 14th week; SHR-C (N = 48) untreated SHR; Wistar (N = 47) control rats. Subgroups of animals were studied at 2, 4, and 8 weeks after discontinuation of captopril. Direct blood pressure was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: SHR; Cardiac hypertrophy; Aorta remodeling; ACE inhibition; Captopril. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2010000400010 |
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| Barreto,F.; Rezende,D.C.; Scaramello,C.B.V.; Silva,C.L.M.; Cunha,V.M.N.; Caricati-Neto,A.; Jurkiewicz,A.; Noël,F.; Quintas,L.E.M.. |
| The regulatory function of α1B-adrenoceptors in mammalian heart homeostasis is controversial. The objective of the present study was to characterize the expression/activity of key proteins implicated in cardiac calcium handling (Na+/K+-ATPase and Ca2+-ATPases) and growth (ERK1/2, JNK1/2 and p38) in mice with cardiac-selective overexpression of constitutively active mutant α1B-adrenoceptor (CAMα1B-AR), which present a mild cardiac hypertrophy phenotype. Immunoblot assays showed that myocardial plasma membrane Ca2+-ATPase (PMCA) expression was increased by 30% in CAMα1B-AR mice (N = 6, P < 0.05), although there was no change in sarco/endoplasmic reticulum Ca2+-ATPase (SERCA2) expression. Moreover, total Ca2+-ATPase activity was not modified, but a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Α1B-adrenoceptors; Ca2+-ATPases; Cardiac hypertrophy; Na+/K+-ATPase; Mitogen-activated protein kinases. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2010000500012 |
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| Saffitz,J.E.. |
| Effective pump function of the heart depends on the precise control of spatial and temporal patterns of electrical activation. Accordingly, the distribution and function of gap junction channels are important determinants of the conduction properties of myocardium and undoubtedly play other roles in intercellular communication crucial to normal cardiac function. Recent advances have begun to elucidate mechanisms by which the heart regulates intercellular electrical coupling at gap junctions in response to stress or injury. Although responses to increased load or injury are generally adaptive in nature, remodeling of intercellular junctions under conditions of severe stress creates anatomic substrates conducive to the development of lethal ventricular... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gap junctions; Cardiac hypertrophy; Heart failure; Arrhythmias. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2000000400006 |
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| Registros recuperados: 11 | |
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