Effect of Voluntary Ethanol Consumption Combined with Testosterone Treatment on Cardiovascular Function in Rats: Influence of Exercise Training

Author(s)

Engi, Sheila A. ^{[1, 2]} ; Planeta, Cleopatra S. ^{[1, 2]} ; Crestani, Carlos C. ^{[1, 2]}

Affiliation

^[1] Joint UFSCar UNESP Grad Program Physiol Sci, Sao Carlos, SP - Brazil

^[2] Univ Estadual Paulista UNESP, Sch Pharmaceut Sci, Pharmacol Lab, Araraquara, SP - Brazil

• Document type: Journal article
• Source: PLoS One; v. 11, n. 1 JAN 13 2016.
• Web of Science Citations: 4

Abstract

This study evaluated the effects of voluntary ethanol consumption combined with testosterone treatment on cardiovascular function in rats. Moreover, we investigated the influence of exercise training on these effects. To this end, male rats were submitted to low-intensity training on a treadmill or kept sedentary while concurrently being treated with ethanol for 6 weeks. For voluntary ethanol intake, rats were given access to two bottles, one containing ethanol and other containing water, three 24-hour sessions per week. In the last two weeks (weeks 5 and 6), animals underwent testosterone treatment concurrently with exercise training and exposure to ethanol. Ethanol consumption was not affected by either testosterone treatment or exercise training. Also, drug treatments did not influence the treadmill performance improvement evoked by training. However, testosterone alone, but not in combination with ethanol, reduced resting heart rate. Moreover, combined treatment with testosterone and ethanol reduced the pressor response to the selective alpha(1)-adrenoceptor agonist phenylephrine. Treatment with either testosterone or ethanol alone also affected baroreflex activity and enhanced depressor response to acetylcholine, but these effects were inhibited when drugs were coadministrated. Exercise training restored most cardiovascular effects evoked by drug treatments. Furthermore, both drugs administrated alone increased pressor response to phenylephrine in trained animals. Also, drug treatments inhibited the beneficial effects of training on baroreflex function. In conclusion, the present results suggest a potential interaction between toxic effects of testosterone and ethanol on cardiovascular function. Data also indicate that exercise training is an important factor influencing the effects of these substances. (AU)

• FAPESP's process: 13/09715-2 - Effects of physical training and testosterone on ethanol - induced changes in the central and cardiovascular systems
• Grantee: Cleopatra da Silva Planeta
• Support Opportunities: Regular Research Grants
• FAPESP's process: 12/14376-0 - Comparison of the effect of two protocols of chronic stress in cardiovascular and autonomic functions in rats
• Grantee: Carlos Cesar Crestani
• Support Opportunities: Regular Research Grants
• FAPESP's process: 12/14723-1 - Central and cardiovascular effects resulting from association between exercise and testosterone administration on ethanol drinking in rats
• Grantee: Sheila Antonagi Engi
• Support Opportunities: Scholarships in Brazil - Doctorate