NOTCH4 and hepatocellular carcinoma: To further confirm that AR suppressed the formation of VM via circRNA7/miR‐7‐5p/VE‐cadherin/Notch4 signals in HCC, we investigated the effect of shcircRNA7 on VM formation and expression of miR‐7‐5p, VE‐cadherin, and Notch4 in HCC cell lines.