TFR2 and hepatocellular carcinoma: The underlying mechanisms of suppressed hepcidin in HCC included the suppression of HAMP, TfR2, HJV, ALK2, and/or circular RNA circ_0004913, upregulations of matriptase-2 and/or GDF15, and the inactivation of RUNX3 and/or mutations in TP53 [73].