GPR55 and hepatocellular carcinoma: Apart from immune cells, GPR55 upregulation was detected in established cell lines (8%), including WA09 embryonic stem cell line during late differentiation into hepatic specification stage, Farage lymphoma cell line exposed to BI-3802, a degrader of the transcription factor BCL6, HepG2 hepatocellular carcinoma cell line treated with adefovir (antiviral agent), and TK6 B-lymphoblastoid cell line subjected to formaldehyde.