Estereologia do miocárdio de ratos jovens e idosos

Águila, Márcia Barbosa; Mandarim-de-Lacerda, Carlos Alberto; Apfel, Mara Ibis Rodrigues

doi:10.1590/s0066-782x1998000200007

Cited by 15 publications

(7 citation statements)

References 13 publications

(17 reference statements)

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“…24 The cellular diameter increases from 5 µm in the newborn to 16 µm in the adult rat. 25 According to our findings, therefore, the myocytes from fetal rats carried by diabetic mothers have the size of myocytes from the adult rat heart. Gestational diabetes in our rats was associated with a significant fetal hyperglycemia.…”

Section: Discussionmentioning

confidence: 51%

Fetal myocardial hypertrophy in an experimental model of gestational diabetes

Menezes¹,

Barra²,

Belló³

et al. 2001

Cardiol Young

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Section: Discussionmentioning

confidence: 51%

Fetal myocardial hypertrophy in an experimental model of gestational diabetes

Menezes¹,

Barra²,

Belló³

et al. 2001

Cardiol Young

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“…The procedure may be repeated several times if we want more security in cases in which the material is highly anisotropic [16]. Then fragments of myocardium were fixed in 10% buffered formalin and dehydrated in a increasing series of alcohols, they were cleared in xylene, embedded in paraffin, sectioned in 7 lm thick cuts and stained with picrosirius red for light microscopy analysis [17].…”

Section: Methodsmentioning

confidence: 99%

Resistance exercise and testosterone treatment alters the proportion of numerical density of capillaries of the left ventricle of aging Wistar rats

et al. 2014

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“…The samples were obtained using the methods described by Águila, Apfel, and Mandarim-De-Lacerda, (1997). Thirty minutes prior to euthanasia, an intraperitoneal injection of heparin (25,000 IU) was administered and the animals were anesthetized with an intraperitoneal injection of a combination of ketamine and xylazine (40 mg/kg of body weight), as proposed by Seraphim, Nunes, and Machado, (2001).…”

Section: Euthanasiamentioning

confidence: 99%

Concurrent training effect on muscle fibers in Wistar rats

Castoldi

Camargo

Magalhães

et al. 2013

Motriz: rev. educ. fis.

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Abstract-The aim of the present study was to determine the modeling of muscle fibers in rats submitted to different exercise protocols. Fifty-five Wistar rats were submitted divided into four different groups: Control group (CG; N=16); endurance training group (ETG; N=13), strength training group (STG; N=13) and concurrent training group (CTG; N=13). The intensity of endurance training was determined by the critical workload. Statistical analysis involved the Kruskal-Wallis test for multiple comparisons, followed by Dunn's post test (p<0.05). All animals submitted to training exhibited an increase in the cross-sectional area of the muscle fibers. The largest increase (p>0.05) occurred in the STG and CTG at both four (mean:2952,95 ± 878,39 mean:2988,84 ± 822,58) and eight weeks respectively (mean:3020,26 ± 800.91; mean:3104,91 ± 817,87). The findings demonstrate similar results obtained with strength training and concurrent training, with a greater increase in muscle fiber area in both groups in comparison to the control group and group submitted to endurance training.Keywords: skeletal muscle, soleus muscle, concurrent training, aerobic exercise, anaerobic exercise Resumo-"Efeito do treinamento concorrente nas fibras musculares de ratos Wistar." O objetivo deste estudo foi observar a modelação das fibras musculares de ratos submetidos a diferentes protocolos de treinamento físico. Foram utilizados 55 animais da raça Wistar, dos quais foram submetidos a quatro diferentes tratamentos, sendo estes: o grupo controle (CTLE), treinamento aeróbio (TAE), treinamento de força (TAN) e treinamento concorrente (TCc). A intensidade do treinamento aeróbio foi determinada pela carga crítica de trabalho. Utilizouse o teste de Kruscal-Wallis para comparações múltiplas, com pós-teste de Dunn, adotou-se o valor de significância de 5% (p=0,05). Observou-se que os grupos de animais treinados mostraram aumento na área de secção transversa (AST) das fibras musculares. Não foi verificada diferença significante (p>0,05) entre os grupos TAN e TCc, tanto em quatro (média:2952,95 ± 878,39 média:2988,84 ± 822,58) como após oito semanas (média:3020,26 ± 800,91; média:3104,91 ± 817,87). Os protocolos de TAN e TCc não se diferenciaram entre si e demonstraram aumento da AST quando comparados aos demais grupos de animais.Palavras-chaves: músculo esquelético, músculo sóleo, treinamento concorrente, exercício anaeróbico Resumen-"Efecto del entrenamiento concurrente en fibras musculares de las ratas Wistar." Nota el modelado de las fibras musculares en ratas sometidas a diferentes protocolos del entrenamiento físico. Se utilizaron 55 ratas Wistar, que fueron sometidas a cuatro tratamientos diferentes: grupo de control (CTLE), entrenamiento aeróbico (TAE), entrenamiento de fuerza (TF) y la entrenamiento concurrente (TC). La intensidad de entrenamiento aeróbico se determinó por el carga crítica del trabajo. Se utilizó la prueba Kruscal-Wallis para comparaciones múltiples con Dunn del postest, se adoptó el nivel del significancia en 5% (p=0,05). Se ob...

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Estereologia do miocárdio de ratos jovens e idosos

Cited by 15 publications

References 13 publications

Fetal myocardial hypertrophy in an experimental model of gestational diabetes

Fetal myocardial hypertrophy in an experimental model of gestational diabetes

Resistance exercise and testosterone treatment alters the proportion of numerical density of capillaries of the left ventricle of aging Wistar rats

Concurrent training effect on muscle fibers in Wistar rats

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