GPC1, HAS1, HAS2, HAS3, EXT1, EXT2, DEFB1, TJP1, and CLDN3 expression was quantified with SYBR® Green Real time PCR Master Mix (Sigma). Reactions were carried out as previously described (5 (link)). The 2−ΔCt method was used to calculate relative mRNA expression normalized to the housekeeping gene GAPDH. The 2−ΔΔCt method was used for calculating fold change in gene expression levels versus untreated controls. All the primers were synthesized by Sigma-Aldrich as previously described in Supplemental Table 1 (22–27 (link)).