HOTAIRM1 and hepatocellular carcinoma: The results showed that HOTAIRM1 was also the most significantly highly expressed lncRNA in the lenvatinib-resistant Huh7-R (Additional file 2: Fig. S2A) and HepG2-R cells (Additional file 2: Fig. S2B), which was consistent with the microarray data, confirming that HOTAIRM1 may be a key lncRNA for lenvatinib resistance in HCC.