Abstract
DNA methylation plays significant roles in a variety of biological and pathological processes including mammalian development, genomic imprinting, retrotransposon silencing, and X-chromosome inactivation. Recent discoveries indicated that ten-eleven translocation (TET) family of dioxygenases can convert 5-methylcytosine (5-mC) into 5-hydroxymethylcytosine (5-hmC). The TET family includes three members: TET1, TET2, and TET3. With increasing evidence, more and more biological and pathological processes in which 5-hmC and TET family serve unparalleled biological roles are noticed, for example, DNA demethylation and transcriptional regulation of different target genes, which are involved in many human diseases, especially hematologic malignancies, resembling chronic myelomonocytic leukemia, myelodysplastic syndromes, and so on. In this review, we focus on the diverse functions of TET family and the novel epigenetic marks, 5-mC and 5-hmC, in hematologic malignancies. This review will provide valuable insights into the potential targets of hematologic malignancies. Further understanding of the normal and pathological functions of TET family may provide new methods to develop novel epigenetic therapies for treating hematologic malignancies.
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