Acta Ortopédica Brasileira (Jan 2011)

IGF-1 minimiza os efeitos deletérios do desuso no músculo sóleo de ratos IGF-1 minimizes the harmful effects of disuse on rat soleus muscle

  • Carlos Alberto da Silva,
  • Carlos Petermann,
  • Karina Maria Cancelliero,
  • João Luiz Quagliotti Durigan,
  • Maria Luíza Ozores Polacow

DOI
https://doi.org/10.1590/S1413-78522011000300004
Journal volume & issue
Vol. 19, no. 3
pp. 137 – 140

Abstract

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OBJETIVO: Avaliar o efeito do tratamento com IGF-1 sobre o perfil metabólico e morfológico do músculo sóleo submetido à imobilização articular de tornozelo. MÉTODOS: Ratos Wistar foram divididos em 3 grupos (n=6): controle (C), imobilizado (I) e imobilizado tratado com IGF (I+IGF; 40mg/Kg) durante 7 dias. RESULTADOS: A imobilização reduziu o peso (34%), o conteúdo de glicogênio (31,6%) a área das fibras musculares (44%), e elevou na densidade do tecido conjuntivo (216%). Por outro lado, o IGF-1 aumentou o glicogênio em 234,6% quando comparado ao I, minimizou a redução de 33,7% na área das fibras musculares e aumentou de 76% no tecido conjuntivo comparado ao C (pOBJECTIVE: To evaluate the effect of IGF-1 treatment on the morphological and metabolic profile of the soleus muscle submitted to ankle joint immobilization. METHODS: Wistar rats were divided into 3 groups (n = 6): control (C), immobilized (I) and immobilized treated with IGF (I + IGF; 40mg/kg) for 7 days. RESULTS: Immobilization led to a reduction in the weight (34%), glycogen content (31.6%) and area of muscle fibers (44%), and increased the density of connective tissue (216%). Also, the IGF-1 increased the glycogen by 234.6% compared to I, minimized the area of muscle fibers by 33.7% and increased the connective tissue by 76% compared to C (p <0, 05). CONCLUSIONS: Treatment with IGF has an anti-catabolic action, which can promote faster recovery in the post-immobilization phase. Level of Evidence: Level II, prospective comparative study.

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