Leishmania infantum arginase: biochemical characterization and inhibition by naturally occurring phenolic substances.

ABSTRACT: Inhibition of Leishmania arginase leads to a decrease in parasite growth and infectivity and thus represents an attractive therapeutic strategy. We evaluated the inhibitory potential of selected naturally occurring phenolic substances on Leishmania infantum arginase (ARGLi) and investigated their antileishmanial activity in vivo. ARGLi exhibited a V_max of 0.28 ± 0.016 mM/min and a K_m of 5.1 ± 1.1 mM for L-arginine. The phenylpropanoids rosmarinic acid and caffeic acid (100 µM) showed percentages of inhibition of 71.48 ± 0.85% and 56.98 ± 5.51%, respectively. Moreover, rosmarinic acid and caffeic acid displayed the greatest effects against L. infantum with IC₅₀ values of 57.3 ± 2.65 and 60.8 ± 11 μM for promastigotes

SUBMITTER: Garcia AR 

PROVIDER: S-EPMC6534257 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature