METTL3 and hepatocellular carcinoma: Recent studies have indicated that both aberrant m6A modification and abnormal expression of m6A regulatory proteins can both be detected in acute myeloid leukaemia (AML) [44], hepatocellular carcinoma (HCC) [45], glioblastoma stem cells (GSCs) [46], breast cancer [47], obesity [19], infertility [20], autoimmune disease [21] and neurological disease [22].