IL4R and gallbladder carcinoma: On the other hand, it was also confirmed that gallbladder carcinoma cell lines (TGBC-1-TKB and TGBC-44-TKB) and extrahepatic cholangiocarcinoma cell lines (KMBC and Sk-ChA-1) expressed IL-4Rα, although the expression levels were lower than those of CCKS-1 and KKU-100 cells.