For example, there are 128 lncRNA-PRC2 interactions involving 63 lncRNAs (such as HOTAIR, MALAT1, TUG1, PVT1, HOXA11-AS, CHKN2B-AS1, UCA1, H19, XIST and SNHG6) in 39 human diseases, including gastric cancer, breast cancer, colorectal cancer, hepatocellular carcinoma and non-small cell lung cancer. Here, HOTAIR is linked to breast cancer.