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Epilepsy-induced electrocardiographic alterations following cardiac ischemia and reperfusion in rats BJMBR
Tavares,J.G.P.; Vasques,E.R.; Arida,R.M.; Cavalheiro,E.A.; Cabral,F.R.; Torres,L.B.; Menezes-Rodrigues,F.S.; Jurkiewicz,A.; Caricati-Neto,A.; Godoy,C.M.G.; Gomes da Silva,S..
The present study evaluated electrocardiographic alterations in rats with epilepsy submitted to an acute myocardial infarction (AMI) model induced by cardiac ischemia and reperfusion. Rats were randomly divided into two groups: control (n=12) and epilepsy (n=14). It was found that rats with epilepsy presented a significant reduction in atrioventricular block incidence following the ischemia and reperfusion procedure. In addition, significant alterations were observed in electrocardiogram intervals during the stabilization, ischemia, and reperfusion periods of rats with epilepsy compared to control rats. It was noted that rats with epilepsy presented a significant increase in the QRS interval during the stabilization period in relation to control rats...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Epilepsy; Heart; Acute myocardial infarction; Ischemia; Reperfusion.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2015000200140
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Lack of evidence for regulation of cardiac P-type ATPases and MAP kinases in transgenic mice with cardiac-specific overexpression of constitutively active α1B-adrenoceptors BJMBR
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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