DNMT3A and lung carcinoma: In this study, they found that the miRNA-29 family, with its subtypes 29a, 29b and 29c, has base pairing complementary to the 3′ end of UTRs in DNMT-3A and B. Thus, the expression of miR-29s led to decreased DNMT3A and B expression in lung cancer, supporting the vital role of miR-29s as epigenetic regulators.