Exercise training changes IL-10/TNF-α ratio in the skeletal muscle of post-MI rats

M. L. Batista, J. C. Rosa, R. D. Lopes, F. S. Lira, E. Martins, A. S. Yamashita, P. C. Brum, A. H. Lancha, A. C. Lopes, M. Seelaender

Research output: Contribution to journalArticlepeer-review


Heart failure (HF) is associated with changes in the skeletal muscle (SM) which might be a consequence of the unbalanced local expression of pro- (TNF-α) and anti- (IL-10) inflammatory cytokines, leading to inflammation-induced myopathy, and SM wasting. This local effect of HF on SM may, on the other hand, contribute to systemic inflammation, as this tissue actively secretes cytokines. Since increasing evidence points out to an anti-inflammatory effect of exercise training, the goal of the present study was to investigate its effect in rats with HF after post-myocardial infarction (MI), with special regard to the expression of TNF-α and IL-10 in the soleus and extensor digitorum longus (EDL), muscles with different fiber composition. Wistar rats underwent left thoracotomy with ligation of the left coronary artery, and were randomly assigned to either a sedentary (Sham-operated and MI sedentary) or trained (Sham-operated and MI trained) group. Animals in the trained groups ran on a treadmill (0% grade at 13-20 m/min) for 60 min/day, 5 days/week, for 8-10 weeks. The training protocol was able to reverse the changes induced by MI, decreasing TNF-α protein (26%, P < 0.05) and mRNA (58%, P < 0.05) levels in the soleus, when compared with the sedentary MI group. Training also increased soleus IL-10 expression (2.6-fold, P < 0.001) in post-MI HF rats. As a consequence, the IL-10/TNF-α ratio was increased. This "anti-inflammatory effect" was more pronounced in the soleus than in the EDL, suggesting a fiber composition dependent response.

Original languageEnglish (US)
Pages (from-to)102-108
Number of pages7
Issue number1
StatePublished - Jan 2010
Externally publishedYes


  • Cytokine
  • Endurance training
  • Heart failure
  • Inflammation
  • Skeletal muscle

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology
  • Biochemistry
  • Hematology
  • Molecular Biology


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