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DNA Methylation Patterns in T(8;21) Acute Myeloid Leukemia Patients



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DNA Methylation Patterns in T(8;21) Acute Myeloid Leukemia Patients by Siu-Ki Ho
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This dissertation, "DNA Methylation Patterns in T(8;21) Acute Myeloid Leukemia Patients" by Siu-ki, Ho, 何肇騏, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Acute myeloid leukemia (AML) is a heterogeneous disease both clinically and biologically. Approximately 55% of AML harbour karyotypic changes, and one of the most common chromosomal aberrations is the t(8;21)(q22;q22), which leads to the AML1-ETO fusion protein. Previous studies have found that this fusion protein recruits the N-CoR/mSin3A/HDAC complex, thereby acts as a transcriptional repressor. Recently, DNA methylation array studies have shown that DNA methylation patterns can stratify AML cases into different subgroups, and some of these correspond to certain chromosomal abnormalities, such as the t(8;21). These findings suggest a possible link between the fusion transcript AML1-ETO and epigenetic modifications. Additionally, c-kit mutations have emerged as an important disease modifier in the t(8;21) AML and are correlated with poor overall survival and event free survival in patients with t(8;21) AML. We therefore sought to investigate whether there are different DNA methylation patterns in t(8;21) AML with or without c-kit mutations. In our series, 52.2% of the t(8;21) AMLs harbored c-kit mutations, which were correlated with poor event free survival. We next performed pyrosequencing on a selected panel of genes and pinpointed the THBS4 and PAWR genes as hypermethylated in their promoter CpG islands in 86.4% and 59.1% of the t(8;21) AML patients, respectively. These data suggest that THBS4 and PAWR may be important in the pathogenesis of t(8;21) AML. DOI: 10.5353/th_b4715138 Subjects: DNA - MethylationAcute myeloid leukemia - Genetic aspects
Release date NZ
January 26th, 2017
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Country of Publication
United States
colour illustrations
Open Dissertation Press
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