Int J Sports Med 2014; 35(04): 339-343
DOI: 10.1055/s-0032-1331740
Clinical Sciences
© Georg Thieme Verlag KG Stuttgart · New York

Oral L-Arginine Modulates Blood Lactate and Interleukin-6 After Exercise in HIV-Infected Men

G. N. Alves
1   Cardiology Division, Hospita de Clinicas de Porto Alegre, Brazil
,
A. M. V. Tavares
2   Exercise Pathophysiology Research Laboratory, Hospital de Clínicas de Porto Alegre, Brazil
,
P. J. C. Vieira
2   Exercise Pathophysiology Research Laboratory, Hospital de Clínicas de Porto Alegre, Brazil
,
E. Sprinz
3   Division of Internal Medicine, Hospital de Clínicas de Porto Alegre, Brazil
,
J. P. Ribeiro
1   Cardiology Division, Hospita de Clinicas de Porto Alegre, Brazil
› Author Affiliations
Further Information

Publication History



accepted after revision 21 November 2012

Publication Date:
10 September 2013 (online)

Abstract

The acute administration of L-arginine (L-arg), a nitric oxide (NO) precursor, reduces lactate (LAC) concentration after exercise in healthy individuals. Lower concentration of L-arg may enhance the action of some inflammatory cytokines in HIV-1 infected patients. We tested the hypothesis that acute L-arg administration may reduce post-exercise blood LAC and inflammatory cytokines levels in HIV-infected patients. 10 HIV-infected men performed 2 maximal incremental cardiopulmonary exercise tests, separated by one week. 30 min before each test, patients received oral placebo or 20 g of L-arg, in random order. Blood LAC, tumor necrosis factor alpha (TNF-alpha), interleukin-6 (IL-6), and interleukin-10 (IL-10) were measured before and up to 60 min after exercise. L-arg administration had no significant effect on exercise performance. Compared to placebo, L-arg administration reduced maximal post-exercise blood LAC from 8.7±0.6 to 6.9±0.4 mmol.L−1 (p<0.05). L-arg administration had no significant effect on TNF-alpha or IL-10 concentrations, but increased post-exercise IL-6 (placebo=19±3pg.mL−1; L-arg=63±8 pg.mL−1; p<0.05). In HIV-1 infected men, acute administration of L-arg reduces post-exercise blood LAC and increases IL-6 levels, suggesting the activation of the L-arg-NO pathway, with possible anti-inflammatory consequences.

 
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