Unknown

Dataset Information

0

MiR-29 represses the activities of DNA methyltransferases and DNA demethylases.


ABSTRACT: Members of the microRNA-29 (miR-29) family directly target the DNA methyltransferases, DNMT3A and DNMT3B. Disturbances in the expression levels of miR-29 have been linked to tumorigenesis and tumor aggressiveness. Members of the miR-29 family are currently thought to repress DNA methylation and suppress tumorigenesis by protecting against de novo methylation. Here, we report that members of the miR-29 family repress the activities of DNA methyltransferases and DNA demethylases, which have opposing roles in control of DNA methylation status. Members of the miR-29 family directly inhibited DNA methyltransferases and two major factors involved in DNA demethylation, namely tet methylcytosine dioxygenase 1 (TET1) and thymine DNA glycosylase (TDG). Overexpression of miR-29 upregulated the global DNA methylation level in some cancer cells and downregulated DNA methylation in other cancer cells, suggesting that miR-29 suppresses tumorigenesis by protecting against changes in the existing DNA methylation status rather than by preventing de novo methylation of DNA.

SUBMITTER: Morita S 

PROVIDER: S-EPMC3742264 | biostudies-literature | 2013 Jul

REPOSITORIES: biostudies-literature

altmetric image

Publications

miR-29 represses the activities of DNA methyltransferases and DNA demethylases.

Morita Sumiyo S   Horii Takuro T   Kimura Mika M   Ochiya Takahiro T   Tajima Shoji S   Hatada Izuho I  

International journal of molecular sciences 20130712 7


Members of the microRNA-29 (miR-29) family directly target the DNA methyltransferases, DNMT3A and DNMT3B. Disturbances in the expression levels of miR-29 have been linked to tumorigenesis and tumor aggressiveness. Members of the miR-29 family are currently thought to repress DNA methylation and suppress tumorigenesis by protecting against de novo methylation. Here, we report that members of the miR-29 family repress the activities of DNA methyltransferases and DNA demethylases, which have opposi  ...[more]

Similar Datasets

| S-EPMC5610952 | biostudies-literature
| S-EPMC4566933 | biostudies-literature
| S-EPMC5529103 | biostudies-literature
| S-SCDT-EMBOR-2021-53581V1 | biostudies-other
| S-EPMC4877953 | biostudies-literature
| S-EPMC4696758 | biostudies-literature
| S-EPMC2000384 | biostudies-literature
| S-EPMC9120943 | biostudies-literature
| S-EPMC9425917 | biostudies-literature
| S-EPMC3193026 | biostudies-literature