RT-qPCR analyses of relative CSPG, extracellular matrix (ECM) glycoprotein, matrix metalloproteinases (MMPs), tissue-inhibitor of metalloproteinases (TIMPs), and Integrin mRNA expression in the WERI-ETOR compared to the WERI-RB1 cell line. (A) In the resistant WERI-ETOR cell line, significantly reduced levels of Brevican (BCAN), Neurocan (NCAN), and Versican (VCAN) were observed. In contrast, Aggrecan (ACAN) expression was comparable in both WERI cell lines. (B) A significant downregulation was observed for all ECM glycoproteins (α1-Laminin (LAMA1), Fibronectin (FN1), Tenascin-C (TNC), and Tenascin-R (TNR)) as well as for Collagen IV (COL4A1). (C) Significant lower expression levels were detected for MMP2, MMP7, MMP9, and TIMP2. While TIMP1 expression was similar in both WERI cell lines. (D) In the WERI-ETOR cell line, significantly reduced levels of integrin receptor subunits ITGA4, ITGA5, and ITGB1 were noted. Values are median ± quartile + maximum/minimum. The dotted line in the graphs represents the relative expression level of the WERI-RB1 cell line. * p < 0.05; ** p < 0.01; *** p < 0.001; n = 10/group.