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Classification of different degrees of adiposity in sedentary rats 56
Leopoldo,A.S.; Lima-Leopoldo,A.P.; Nascimento,A.F.; Luvizotto,R.A.M.; Sugizaki,M.M.; Campos,D.H.S.; da Silva,D.C.T.; Padovani,C.R.; Cicogna,A.C..
In experimental studies, several parameters, such as body weight, body mass index, adiposity index, and dual-energy X-ray absorptiometry, have commonly been used to demonstrate increased adiposity and investigate the mechanisms underlying obesity and sedentary lifestyles. However, these investigations have not classified the degree of adiposity nor defined adiposity categories for rats, such as normal, overweight, and obese. The aim of the study was to characterize the degree of adiposity in rats fed a high-fat diet using cluster analysis and to create adiposity intervals in an experimental model of obesity. Thirty-day-old male Wistar rats were fed a normal (n=41) or a high-fat (n=43) diet for 15 weeks. Obesity was defined based on the adiposity index; and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Obesity; Adiposity index; Rats; Cluster analysis.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2016000400601
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Obesity induces upregulation of genes involved in myocardial Ca2+ handling 56
Lima-Leopoldo,A.P.; Sugizaki,M.M.; Leopoldo,A.S.; Carvalho,R.F.; Nogueira,C.R.; Nascimento,A.F.; Martinez,P.F.; Luvizotto,R.A.M.; Padovani,C.R.; Cicogna,A.C..
Obesity is a complex multifactorial disorder that is often associated with cardiovascular diseases. Research on experimental models has suggested that cardiac dysfunction in obesity might be related to alterations in myocardial intracellular calcium (Ca2+) handling. However, information about the expression of Ca2+-related genes that lead to this abnormality is scarce. We evaluated the effects of obesity induced by a high-fat diet in the expression of Ca2+-related genes, focusing the L-type Ca2+ channel (Cacna1c), sarcolemmal Na+/Ca2+ exchanger (NCX), sarcoplasmic reticulum Ca2+ ATPase (SERCA2a), ryanodine receptor (RyR2), and phospholamban (PLB) mRNA in rat myocardium. Male 30-day-old Wistar rats were fed a standard (control) or high-fat diet (obese) for...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Obesity; High-fat diet; Rat heart; Ca2+ cycling; MRNA; Ca2+-related genes.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2008000700011
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Chronic aerobic exercise associated to low-dose L-NAME improves contractility without changing calcium handling in rat cardiomyocytes 56
Luchi,T.C.; Coelho,P.M.; Cordeiro,J.P.; Assis,A.L.E.M.; Nogueira,B.V.; Marques,V.B.; dos Santos,L.; Lima-Leopoldo,A.P.; Lunz,W.; Leopoldo,A.S..
Nitric oxide (NO) inhibition by high-dose NG-nitro-L-arginine methyl ester (L-NAME) is associated with several detrimental effects on the cardiovascular system. However, low-dose L-NAME increases NO synthesis, which in turn induces physiological cardiovascular benefits, probably by activating a protective negative feedback mechanism. Aerobic exercise, likewise, improves several cardiovascular functions in healthy hearts, but its effects are not known when chronically associated with low-dose L-NAME. Thus, we tested whether the association between low-dose L-NAME administration and chronic aerobic exercise promotes beneficial effects to the cardiovascular system, evaluating the cardiac remodeling process. Male Wistar rats were randomly assigned to control...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Nitric oxide; Aerobic exercise; Cardiac remodeling; Cardiomyocyte; Calcium.
Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2020000300611
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