Alterações na produção de IL-10 e TNF-α no músculo esquelético em ratos com insuficiência cardíaca secundária ao infarto do miocárdio

Translated title of the contribution: Changes in the production of IL-10 and TNF-α in skeletal muscle of rats with heart failure secondary to acute myocardial infarction

Renato Delacio Lopes, Miguel Luiz Batista, José Cesar Rosa, Fabio Santos De Lira, Eivor Martins, Alex Yamashita Shimura, Patrícia Chakur Brum, Antonio Herbert Lancha, Marília C.L. Seelaender, Antonio Carlos Lopes

Research output: Contribution to journalArticlepeer-review

Abstract

Background: Recent studies show that the expression of inflammatory mediators, such as cytokines, is an important factor for the development and progression of heart failure (HF), especially in the presence of left ventricular dysfunction. These changes have been demonstrated both in the plasma and heart muscle and, more recently, in skeletal muscle of rats and in patients with HF. Objective: To investigate the production and expression of tumor necrosis factor-α (TNF) and interleukin-10 (IL-10) in the soleus and the extensor digitorum longus (EDL) muscles of animals with left ventricular dysfunction after myocardial infarction (MI). Methods: We used male Wistar rats that underwent ligation of the left coronary artery without reperfusion. Four weeks after this procedure, the animals underwent echocardiography and were divided into the following experimental groups: sham operated (sham) and IM. They remained under observation for a further period of 8 weeks. Results: The level of the cytokine TNF-α increased by 26.5% (p <0.05), and its gene expression increased 3 times (p <0.01). The level of IL-10 decreased by 38.2% (p <0.05). Both changes occurred only in the soleus muscle, with no change in the EDL. The decrease (36.5%, p <0.05) in the IL-10/TNF-α ratio was due to both increased tissue levels of TNF-α and decreased tissue levels of IL-10. Conclusion: Our results showed significant changes in the IL-10/TNF-α ratio, which may have an additive role in the assessment of deterioration and progression of left ventricular dysfunction post-MI. Furthermore, our study suggests that these changes seem to be related to the muscle fiber type.

Translated title of the contributionChanges in the production of IL-10 and TNF-α in skeletal muscle of rats with heart failure secondary to acute myocardial infarction
Original languagePortuguese
Pages (from-to)293-300+313-320
JournalArquivos brasileiros de cardiologia
Volume94
Issue number3
DOIs
StatePublished - Mar 2010
Externally publishedYes

Keywords

  • Cytokines
  • Inflammation
  • Muscle, skeletal
  • Ventricular dysfunction, left

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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