European Journal of Applied Physiology

, Volume 103, Issue 2, pp 215–223 | Cite as

Aerobic exercise affects C57BL/6 murine intestinal contractile function

  • Claudio Andre Barbosa de Lira
  • Rodrigo Luiz Vancini
  • Silvia Saiuli Miki Ihara
  • Antonio Carlos da Silva
  • Jeannine Aboulafia
  • Viviane Louise Andree Nouailhetas
Original Article

Abstract

This study investigated the influence of a moderate exercise training program on the intestinal contractility based on the hypothesis that this organ may endure repetitive periods of ischemia-reperfusion events during moderate aerobic training (10, 25, 40, and 55 days of 60-min treadmill running at 13–21 m/min, 5 days/week). The adaptation of the animal to this program was assessed by significant increase of animal physical performance associated with a mild increase in the wet heart mass-to-body mass ratio. The endurance exercise training caused functional changes of the C57BL/6 ileum contractility, mainly causing a significant reduction of the efficacy of both the electro- (KCl) and pharmacomechanical (acetylcholine, [2-lysine]-angiotensin II, and bradykinin) couplings after 55 days of moderate treadmill running. The level of ileum lipid peroxidation, evaluated by an indirect method, significantly decreased after 10 days of moderate aerobic training, remaining at this lower level throughout the 55 days of training. Altogether, these data demonstrate that the murine ileum is an important target for aerobic moderate exercise training program by causing impairment of the contractility in response to either agonists or depolarization, and that endurance exercise exerts a remarkable protective effect against tissue oxidative stress.

Keywords

Running training Mouse Ileum Oxidative stress Gastrointestinal smooth muscle 

Notes

Acknowledgments

We are grateful to Antonio C. Souza, Mauro C. Pereira, and Nelson A. Mora for their technical assistance. This work was supported by Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP). C.A.B. Lira was initially a fellowship from Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), and then from Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES).

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Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • Claudio Andre Barbosa de Lira
    • 1
  • Rodrigo Luiz Vancini
    • 1
  • Silvia Saiuli Miki Ihara
    • 2
  • Antonio Carlos da Silva
    • 1
  • Jeannine Aboulafia
    • 3
  • Viviane Louise Andree Nouailhetas
    • 3
  1. 1.Department of PhysiologyFederal University of São Paulo (UNIFESP)São PauloBrazil
  2. 2.Department of PathologyFederal University of São Paulo (UNIFESP)São PauloBrazil
  3. 3.Department of BiophysicsFederal University of São Paulo (UNIFESP)São PauloBrazil

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