Table 1: Inhibitory effects of the kernel of Zea mays L. extracts on rat lens aldose reductase (RLAR).

Extracts and fractionsConcentration (μg/mL)Inhibition (%)IC50 (μg/mL)

Purple corn EtOH ext.1062.46
539.06.72
13.18
Purple corn polyphenol extracts (PCPEs)1078.53
558.183.72
112.37
PCPE—hexane fr.1066.13
539.137.28
15.85
PCPE—methylene chloride fr.1071.09
553.854.30
113.38
PCPE—ethyl acetate fr.571.91
132.882.06
0.513.84
PCPE— -butanol fr.1030.19>10
PCPE—water fr.1020.61>10
Quercetina1082.99
567.912.34
130.34

Inhibition rate was calculated as percentage with respect to the control value and expressed as mean of triplicate experiments. The concentration of each test sample giving rise to 50% inhibition of activity (IC50) was estimated from the least-squares regression line of the logarithmic concentration plotted against inhibitory activity. aQuercetin was used as positive control.