Fig. 5.
Influence of A2A receptor agonist (CGS 21680) and antagonist (caffeine) on NO production by neutrophils stimulated with T. vaginalis. The presence of agonist CGS 21680 caused a low NO production, as well as adenosine. The antagonist, caffeine, reversed the effect of the nucleoside. Bars represent the mean ± S.D. of at least three independent experiments. Data were analyzed by ANOVA followed by Tukey's test (p < 0.05). Symbols represent difference when compared with: (asterisk) neutrophils stimulated with T. vaginalis isolates; (number sign) effect of adenosine; (section sign) effect of CGS 21680