ABCG2 and hepatocellular carcinoma: In addition, the levels of lncRNA very low density lipoprotein receptor (VLDLR) are significantly increased in HCC, and the knockdown of lncRNA VLDLR significantly reduced HCC proliferation and the expression of BCRP/ABCG2, while overexpression of BCRP/ABCG2 decreased the effect of lncRNA VLDLR1 knockdown on sorafenib-induced cell death in HepG2 cells [22].