ITGB4 and familial pancreatic carcinoma: Finally, the TCGA and GTEx databases were used to verify a weak, but significant inverse correlation of CD45 (PTPRC gene), CCR5 and CCR1 with ITGB4 in human pancreatic cancer (Additional file 9: Fig. S9A), but not normal pancreas (Additional file 9: Fig. S9B).