GPX2 and exocrine pancreatic carcinoma: However, in glioblastoma cell lines, there was no expression of GPX2. Regarding the expression obtained in biopsies, six of the pancreatic carcinoma patients and six of the colorectal carcinoma patients showed expression levels similar to those observed in pancreatic carcinoma cell lines and in SW-480 colorectal carcinoma cell line, lower than 0.5% with respect to the expression in HT-29 (Figure 10C).