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- W2102899429 abstract "Complete loss or deletion of the long arm of chromosome 5 is frequent in myelodysplastic syndrome (MDS) and acute myelogenous leukemia (AML). The putative gene(s) deleted and responsible for the pathogenesis of these poor prognosis hematologic disorders remain controversial. This study is a comprehensive analysis of previously implicated and novel genes for epigenetic inactivation in AML and MDS. In 146 AML cases, methylation of CTNNA1 was frequent, and more common in AML patients with 5q deletion (31%) than those without 5q deletion (14%), whereas no methylation of other 5q genes was observed. In 31 MDS cases, CTNNA1 methylation was only found in high-risk MDS (>or=RAEB2), but not in low-risk MDS (<RAEB2), indicating that CTNNA1 methylation might be important in the transformation of MDS to AML. CTNNA1 expression was lowest in AML/MDS patients with CTNNA1 methylation, although reduced expression was found in some patients without promoter methylation. Repressive chromatin marks (H3K27me3) at the promoter were identified in CTNNA1-repressed AML cell lines and primary leukemias, with the most repressive state correlating with DNA methylation. These results suggest progressive, acquired epigenetic inactivation at CTNNA1, including histone modifications and promoter CpG methylation, as a component of leukemia progression in patients with both 5q- and non-5q- myeloid malignancies." @default.
- W2102899429 created "2016-06-24" @default.
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- W2102899429 date "2009-10-28" @default.
- W2102899429 modified "2023-10-03" @default.
- W2102899429 title "Progressive Chromatin Repression and Promoter Methylation of <i>CTNNA1</i> Associated with Advanced Myeloid Malignancies" @default.
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- W2102899429 doi "https://doi.org/10.1158/0008-5472.can-09-1153" @default.
- W2102899429 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3081599" @default.
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