They found that MALAT1 was a metastasis-suppressing lncRNA in NSG mice; however, Arun et al.53 and Li et al.149 reported that MALAT1 promoted the invasion and metastasis of breast cancer in the MMTV-PyMT mouse mammary carcinoma model and in 4T1 xenograft mice. The gene discussed is MALAT1; the disease is breast cancer.