Exercise training ameliorates the impairment of endothelial and nitrergic corpus cavernosum responses in diabetic rats

Mario A. Claudino, Maria A. Delbin, Carla F. Franco-Penteado, Fernanda Priviero, Gilberto De Nucci, Edson Antunes, Angelina Zanesco

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Aims: The effect of exercise training (ET) on vascular responsiveness in diabetes mellitus has been largely well studied. However, limited studies have investigated the effects of ET on functional responses of the corpus cavernosum (CC) in diabetic animals. Therefore, the aim of this study was to investigate whether prior ET prevents the impairment of erectile function in streptozotocin-induced diabetic rats. Main methods: Rats were exercised for four weeks prior to the induction of diabetes, and then again for another 4 weeks thereafter. Concentration-response curves to acetylcholine, sodium nitroprusside, Y-27632, BAY 412272 and phenylephrine (PE) were obtained in CC. The excitatory and inhibitory effects of electrical-field stimulation were also evaluated. Key findings: Plasma SOD levels were markedly decreased in the sedentary diabetic group (D-SD) as compared to control sedentary animals (C-SD), approximately 53% (P < 0.05) and this reduction was restored in trained diabetic animals. Physical training restored the impairment of endothelium-dependent and -independent relaxation responses seen in the D-SD group. The potency values for Y-27632 in the CC were significantly reduced in the D-SD group, which was reversed by physical training. The impairment of electrical-field stimulation (EFS)-induced relaxation seen in the D-SD group was restored by physical training. On the other hand, both EFS-induced contractions and concentration-response curves to PE in cavernosal strips were not modified by either diabetes or physical training. Significance: Practice of regular physical exercise may be an important approach in preventing erectile dysfunction associated with diabetes mellitus by re-establishment of the balance between NO production and its inactivation.

Original languageEnglish (US)
Pages (from-to)272-277
Number of pages6
JournalLife sciences
Volume88
Issue number5-6
DOIs
StatePublished - Jan 31 2011

Fingerprint

Medical problems
Rats
Exercise
Electric Stimulation
Animals
Phenylephrine
Diabetes Mellitus
Nitroprusside
Erectile Dysfunction
Streptozocin
Acetylcholine
Endothelium
Blood Vessels
Plasmas
Y 27632

Keywords

  • Corpus cavernosum
  • Diabetes
  • Physical training
  • Superoxide dismutase

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Pharmacology, Toxicology and Pharmaceutics(all)

Cite this

Claudino, M. A., Delbin, M. A., Franco-Penteado, C. F., Priviero, F., De Nucci, G., Antunes, E., & Zanesco, A. (2011). Exercise training ameliorates the impairment of endothelial and nitrergic corpus cavernosum responses in diabetic rats. Life sciences, 88(5-6), 272-277. https://doi.org/10.1016/j.lfs.2010.11.018

Exercise training ameliorates the impairment of endothelial and nitrergic corpus cavernosum responses in diabetic rats. / Claudino, Mario A.; Delbin, Maria A.; Franco-Penteado, Carla F.; Priviero, Fernanda; De Nucci, Gilberto; Antunes, Edson; Zanesco, Angelina.

In: Life sciences, Vol. 88, No. 5-6, 31.01.2011, p. 272-277.

Research output: Contribution to journalArticle

Claudino, MA, Delbin, MA, Franco-Penteado, CF, Priviero, F, De Nucci, G, Antunes, E & Zanesco, A 2011, 'Exercise training ameliorates the impairment of endothelial and nitrergic corpus cavernosum responses in diabetic rats', Life sciences, vol. 88, no. 5-6, pp. 272-277. https://doi.org/10.1016/j.lfs.2010.11.018
Claudino, Mario A. ; Delbin, Maria A. ; Franco-Penteado, Carla F. ; Priviero, Fernanda ; De Nucci, Gilberto ; Antunes, Edson ; Zanesco, Angelina. / Exercise training ameliorates the impairment of endothelial and nitrergic corpus cavernosum responses in diabetic rats. In: Life sciences. 2011 ; Vol. 88, No. 5-6. pp. 272-277.
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