HOTTIP and neoplasm: LncRNAs regulate EMT process by targeting EMT-related signalling pathways directly (i.e., H19, HOTAIR, ZEB2-AS1, LincRNA-p21 and SNHG1), or function as ceRNAs (i.e., H19, HOTTIP, MALAT1, SNHG1 and SNHG6) for tumour suppressive miRNAs.