Analysis of TET2 and EZH2 gene functions in chromosome instability in acute myeloid leukemia.
Jingyi WangNa HeRuiqing WangTian TianFengjiao HanChaoqin ZhongChen ZhangMingqiang HuaChunyan JiDaoxin MaPublished in: Scientific reports (2020)
TET2 and EZH2 play important roles in the epigenetic regulation in many cancers. However, their specific roles in acute myeloid leukemia (AML) pathogenesis remain unknown. Here, the expression, methylation or mutation of EZH2 and TET2 was determined and further correlated with the levels of the chromosome instability (CIN) genes MAD2 and CDC20. We down-regulated EZH2 and TET2 in AML cell lines and assessed the effect on CIN using fluorescence in situ hybridization (FISH). Our results showed that TET2, EZH2, MAD2 and CDC20 were aberrantly expressed in AML patients. The expression level of MAD2 or CDC20 was positively correlated with that of TET2 or EZH2. Hypermethylation of the TET2 gene down-regulated its transcription. Down-regulation of EZH2 or TET2 expression inhibited apoptosis, affected MAD2 and CDC20 expression, and promoted CIN in AML cells. Decitabine treatment restored TET2 methylation and EZH2 transcription and ameliorated CIN in AML. Therefore, TET2 and EZH2 play a tumor-inhibiting role in AML that affects CIN via MAD2 and CDC20.
Keyphrases
- acute myeloid leukemia
- long non coding rna
- poor prognosis
- long noncoding rna
- genome wide
- cell cycle
- allogeneic hematopoietic stem cell transplantation
- transcription factor
- dna methylation
- copy number
- binding protein
- end stage renal disease
- chronic kidney disease
- induced apoptosis
- signaling pathway
- young adults
- prognostic factors
- endoplasmic reticulum stress
- smoking cessation
- pi k akt
- bioinformatics analysis