Scratch closure rate.

<p>Quantification of the effect of PL on scratch closure. A progressive closure was observed with PL treatment, starting from 18 hours. Scratch wounded cells incubated with 10% and 20% PL for 48 and 72 hours showed a significant higher scratch closure as compared to 5% PL, comparable to complete medium (positive control). *: p<0.05; **: p<0.005, all vs. 0% PL. α: p<0.05 vs. 5% PL. Bars represent the means ± SD of values obtained from three independent experiments each one with three replicates per group of treatment. Closure rates are expressed as percentage of scratch closure after 6, 18, 24, 48 and 72 hours compared to the initial area.