Abstract
The t(8;21) translocation is one of the most frequent cytogenetic abnormalities in acute myeloid leukaemia (AML) and results in the RUNX1/RUNX1T1 rearrangement. Despite the causative role of the RUNX1/RUNX1T1 fusion gene in leukaemia initiation, additional genetic lesions are required for disease development. Here we identify recurring ZBTB7A mutations in 23% (13/56) of AML t(8;21) patients, including missense and truncating mutations resulting in alteration or loss of the C-terminal zinc-finger domain of ZBTB7A. The transcription factor ZBTB7A is important for haematopoietic lineage fate decisions and for regulation of glycolysis. On a functional level, we show that ZBTB7A mutations disrupt the transcriptional repressor potential and the anti-proliferative effect of ZBTB7A. The specific association of ZBTB7A mutations with t(8;21) rearranged AML points towards leukaemogenic cooperativity between mutant ZBTB7A and the RUNX1/RUNX1T1 fusion.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Base Sequence
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Cell Line, Tumor
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Chromosomes, Human, Pair 21 / chemistry
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Chromosomes, Human, Pair 21 / metabolism
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Chromosomes, Human, Pair 8 / chemistry
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Chromosomes, Human, Pair 8 / metabolism
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Core Binding Factor Alpha 2 Subunit / genetics*
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Core Binding Factor Alpha 2 Subunit / metabolism
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DNA-Binding Proteins / genetics*
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DNA-Binding Proteins / metabolism
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Gene Expression Profiling
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Gene Expression Regulation, Leukemic*
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Glycolysis / genetics
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HEK293 Cells
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Humans
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Leukemia, Myeloid, Acute / genetics*
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Leukemia, Myeloid, Acute / metabolism
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Leukemia, Myeloid, Acute / mortality
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Leukemia, Myeloid, Acute / pathology
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Mutation*
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Oncogene Proteins, Fusion / genetics*
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Oncogene Proteins, Fusion / metabolism
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Protein Domains
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RUNX1 Translocation Partner 1 Protein / genetics*
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RUNX1 Translocation Partner 1 Protein / metabolism
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Signal Transduction
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Survival Analysis
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Transcription Factors / genetics*
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Transcription Factors / metabolism
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Translocation, Genetic*
Substances
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AML1-ETO fusion protein, human
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Core Binding Factor Alpha 2 Subunit
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DNA-Binding Proteins
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Oncogene Proteins, Fusion
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RUNX1 Translocation Partner 1 Protein
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RUNX1 protein, human
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RUNX1T1 protein, human
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Transcription Factors
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ZBTB7A protein, human