HEY1 and neoplasm: Utilizing mRNA extracted from the same tumor xenografts (systemic decorin treatment for 23 days at 10 mg/Kg) and that used for the microarray experiments, we performed qPCR as a method to validate stromal gene expression for Mrgpra2, Gucy1a3, Siglech, Ligp, Irg1, and Il1b (downregulated genes) and for Bmp2k, Cadm1, Hey1, Peg3, Brd4, Zc3hav1 (upregulated genes).