Research Article

Methotrexate and Cyclosporine Treatments Modify the Activities of Dipeptidyl Peptidase IV and Prolyl Oligopeptidase in Murine Macrophages

Figure 1

Effect of Z-pro-prolinal on soluble prolyl oligopeptidase activity of thioglycollate-elicited murine macrophages. The values (means ± SEM from 5 animals) were recorded in triplicate as the percentage of inhibition relative to control reactions (enzyme activity = 100%, percentage of inhibition = 0) which run simultaneously in absence of Z-pro-prolinal. All concentrations of Z-pro-prolinal produced lower levels of enzyme activity when compared to the control (unpaired two-sided Student's t-test, 3 2 0 ± 2 3 ). 3 4 3 ± 1 8 ? ? ? in comparison to ? ?? < . 0 5  M or ? ? ?? < . 0 1  M; ? ? ? ?? < . 0 0 1 in comparison to all other concentrations of Z-pro-prolinal (analysis of variance, ANOVA, followed by SNK test).
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