Determinando os efeitos combinados de três semanas de consumo de suplemento de HMB e uma sessão de exercício resistido excêntrico extremo sobre as taxas de expressão dos genes MyoG e CD56 em células satélites

  • Elias Kowsari Exercise Physiology Research Center, Life Style Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
  • Alireza Asgari Exercise Physiology Research Center, Life Style Institute, Baqiyatallah University of Medical Sciences, Tehran, IranAerospace Medicine Research Center, Aja University of Medical Sciences, Tehran, Iran
  • Hossein Shirvani Exercise Physiology Research Center, Life Style Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
  • Behzad Bazgir Exercise Physiology Research Center, Life Style Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
  • Mostafa Rahimi Department of physical education and Sport sciences, Faculty of Humanities, Shahrekord University, Shahrekord, Iran
Palavras-chave: Exercício de resistência excêntrico, Beta-hidroxi beta-metil butirato, Células satélite

Resumo

O objetivo do presente estudo foi determinar os efeitos combinados do consumo de suplemento HMB-FA e uma sessão de treinamento de resistência extrema sobre a taxa de ativação das células satélites de ratos machos maduros. Para este fim, uma vez realizados os estudos preliminares, oitenta ratos machos Sprague Dowley (grupo controle: 18 ratos; grupo HMB: 19 ratos; grupo exercí­cio: 19 ratos; grupo exercí­cio + HMB: 19 ratos) com oito semanas e peso de 200 ± 20 gramas foram selecionados para o estudo. Após o curso de familiarização em escadas, a ingestão diária de suplemento foi iniciada e mantida por três semanas. Uma vez que os ratos foram familiarizados com a escada e o suplemento foi recebido por três semanas, uma sessão de treinamento de resistência foi administrado. O protocolo do treinamento incluiu descer de uma escada com uma inclinação de 80% enquanto um peso de 100-110% 1RM foi anexado às caudas dos ratos. Os resultados da extração de RNA e imuno-histoquí­mica mostraram que as três intervenções experimentais resultaram em um aumento na expressão dos genes MyoG e CD56 no trí­ceps. O ponto importante, no entanto, foi que a intervenção mais efetiva foi a intervenção exercí­cio + HMB. As quantidades de genes CD56 e MyoG foram estatisticamente significativamente aumentadas nos grupos de HMB, Exercí­cio e Exercí­cio + HMB (p = 0,001). De acordo com os resultados obtidos, o consumo de suplemento de HMB em combinação com a efetivação de exercí­cios excêntricos pode desempenhar um papel efetivo na ativação, proliferação de propagação e diferenciação de células satélites. De fato, atletas e militares que em alguns pontos se envolvem em atividades fí­sicas pesadas e usam treinamento preparatório extremo para maximizar sua prontidão fí­sica podem usar suplemento HMB simultaneamente com seu treinamento e obter resultados ainda mais eficientes.

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Publicado
2019-01-25
Como Citar
Kowsari, E., Asgari, A., Shirvani, H., Bazgir, B., & Rahimi, M. (2019). Determinando os efeitos combinados de três semanas de consumo de suplemento de HMB e uma sessão de exercício resistido excêntrico extremo sobre as taxas de expressão dos genes MyoG e CD56 em células satélites. RBNE - Revista Brasileira De Nutrição Esportiva, 13(77), 94-105. Recuperado de https://www.rbne.com.br/index.php/rbne/article/view/1261
Seção
Artigos Científicos - Original