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Effects of statin and aerobic physical exercise association in the cardiomyocytes of the rat: morphometric study / Efectos de la asociación de estatina y del ejercicio aeróbico en los cardiomiocitos de rata: estudio morfométrico
Padulla, Susimary Aparecida Trevizan; Azoubel, Reinaldo; Bonfim, Mariana Rotta; Accioly, Marilita Falángola; Camargo Filho, José Carlos Silva; Padovani, João Armando; Brandao, Antonio Carlos; Souza, Dorotéia Rossi Silva.
  • Padulla, Susimary Aparecida Trevizan; São Paulo State University. Physiotherapy Department. BR
  • Azoubel, Reinaldo; University of São José do Rio Preto. BR
  • Bonfim, Mariana Rotta; s.af
  • Accioly, Marilita Falángola; University of São José do Rio Preto. BR
  • Camargo Filho, José Carlos Silva; São Paulo State University. Physiotherapy Department. BR
  • Padovani, João Armando; University of São José do Rio Preto. BR
  • Brandao, Antonio Carlos; University of São José do Rio Preto. BR
  • Souza, Dorotéia Rossi Silva; University of São José do Rio Preto. BR
Int. j. morphol ; 27(1): 83-88, Mar. 2009. graf, tab
Article in English | LILACS | ID: lil-552991
ABSTRACT
Physical exercise and statins, recommended interventions to dyslipidaemia treatment, are independently related to cardiomyocytes alterations, characterized by miocardic hypertrophy and apoptosis, respectively. Thus, the objective of the present study was to analyze the effects of statin and aerobic physical exercise association in the morphometric parameters of cardiac cell nucleus. 40 male rats adults were divided into four groups exercised (DE); sedentary (DS), exercised and statin use (DES); sedentary and statin use (DSS). The animals received during the whole experimental period a hiperlipidic diet added 20 percent of coconut oil and 1.25 percent of cholesterol; after 30 days of its ingestión, a blood collection was made to verify the dyslipidaemia. Simvastatin (20 mg) was taken five days a week, during eight weeks. During this period, the animals exercised 60 minutes daily in the treadmill. After the last day of the protocol, the cardiac muscle was collected and maintained in liquid nitrogen (-180°C); the cuts were stained by Hematoxilin-Eosin method, and the cardiac fibers were submitted to the nuclear morphometric analyses. The data were analyzed using descriptive analyses, paired T test, Kruskal-Wallis test and Dunn post hoc test; for all analyses, it was adopted p<0.05. It was verified that the group receiving statin presented values statistically significant in comparison to the other groups, in the tridimensional and linear variables. The exercised and statin group, the values obtained in the morphometric analyses were similar to the control group. It is suggested that statins alone can cause alterations in the nucleus of cardiac cells that can be related to apoptosis occurrence and, when exercise is practiced associated to statin administration, the effects of statin can be reduced, what can be related to beneficial adaptations of cardiac mitochondrial in response to physical exercise, turning them more resistant to apoptotic stimuli.
RESUMEN
El ejercicio físico y las estatinas, intervenciones recomendadas para tratamiento de la dislipidemia, están independientemente relacionadas con las alteraciones de los cardiomiocitos, que se caracterizan por hipertrofia miocárdica y apoptosis, respectivamente. El objetivo del presente estudio fue analizar los efectos de la asociación de estatinas y el ejercicio físico aeróbico en los parámetros morfométricos del núcleo de células cardíacas. 40 ratas macho adultas se dividieron en cuatro grupos ejercitadas (DE); sedentarias (DS), ejercitadas y con uso de estatina (DES), sedentarias y con uso de estatina (DSS). Los animales recibieron durante todo el período experimental una dieta hiperlipidemica añadiendo 20 por ciento de aceite de coco y 1,25 por ciento de colesterol. Después de 30 días de su ingestión, se les extrajo sangre para verificar la dislipidemia. Los ejemplares ingirieron Simvastatina (20 mg) cinco días a la semana, durante ocho semanas. Durante este período, los animales ejercitaron 60 minutos diarios en la rueda de andar. Después del último día del protocolo,los animales fueron sacrificados y se les extrajo músculo cardiaco que fue mantenido en nitrógeno líquido (-180°C). De este material se obtuvieron cortes que fueron teñidos por el método de hematoxilina-eosina y las fibras cardiacas fueron sometidas a análisis morfométrico nuclear. Los datos fueron analizados mediante el análisis descriptivo, prueba de la t de Student, prueba de Kruskal-Wallis y Dunn test post hoc. Para todos los análisis fue aprobado p <0,05. Se comprobó que el grupo que recibió estatinas presentó valores estadísticamente significativos en comparación con los otros grupos, en las variables lineales y tridimensionales. En el grupo ejercitado y estatina, los valores obtenidos de los análisis morfométricos fueron similares a los del grupo control. Se sugiere que las estatinas, por sí solas, pueden causar alteraciones en el núcleo de las células cardiacas ...
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Full text: Available Index: LILACS (Americas) Main subject: Exercise / Hydroxymethylglutaryl-CoA Reductase Inhibitors / Myocytes, Cardiac Type of study: Practice guideline / Risk factors Limits: Animals Language: English Journal: Int. j. morphol Journal subject: Anatomy Year: 2009 Type: Article Affiliation country: Brazil Institution/Affiliation country: São Paulo State University/BR / University of São José do Rio Preto/BR

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Full text: Available Index: LILACS (Americas) Main subject: Exercise / Hydroxymethylglutaryl-CoA Reductase Inhibitors / Myocytes, Cardiac Type of study: Practice guideline / Risk factors Limits: Animals Language: English Journal: Int. j. morphol Journal subject: Anatomy Year: 2009 Type: Article Affiliation country: Brazil Institution/Affiliation country: São Paulo State University/BR / University of São José do Rio Preto/BR