Effects of released small molecules on HUVEC tube formation, migration, and gene expression. (A) Node density measured based on the formed tubes (n=4, **p<0.01); (B) Wound closure percentage by measuring the distance of HUVEC migration in the wound scratch assay (n=4, *p<0.05, **p<0.01); (C) qPCR analysis of VEGFA, PECAM, and vWF genes for HUVEC (n=3; bars that do not share letters are significantly different from each other (p<0.05)).