Scratch closure is faster in fetal fibroblast and keratinocyte co-cultures than in fibroblast or keratinocyte mono-cultures.

<p><b>A</b>, Representative images of the progression of the scratch closure at T0, 5 h and 20 h for keratinocytes (upper panel), fibroblasts (middle panel) and both in co-culture (lower panel). <b>B</b>, The extent of the scratch closure in scratch assays performed on fetal fibroblasts, keratinocytes or both in co-culture at 5 h and 20 h. Data shown are the means ± SD (n = 4). Asterisks denote significant differences in the extent of the scratch closure (*, p<0.05; **, p<0.01).