METTL14 and breast carcinoma: Conversely, in another study, significantly upregulated METTL14 expression was observed in breast cancer tissue compared with normal tissue, and METTL14 overexpression enhanced the migration and invasion capacities of breast cancer cells [25], while other researchers have reported significantly upregulated levels of METTL14 and m6A in breast cancer cells and tissues, and the modulation of METTL14 by long noncoding RNA LINC00942 (LNC942) promoted breast cancer initiation and progression [26].