Transcription factor mutations in myelodysplastic/myeloproliferative neoplasms
Background Aberrant activation of tyrosine kinases, caused by either mutation or gene fusion, is of major importance for the development of many hematologic malignancies, particularly myeloproliferative neoplasms. We hypothesized that hitherto unrecognized, cytogenetically cryptic tyrosine kinase fu...
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| Main Authors: | , , , , , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
2010-09-01
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| In: |
Haematologica, the hematology journal
Year: 2010, Volume: 95, Issue: 9, Pages: 1473-1480 |
| ISSN: | 1592-8721 |
| DOI: | 10.3324/haematol.2010.021808 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.3324/haematol.2010.021808 Verlag, lizenzpflichtig, Volltext: https://haematologica.org/article/view/5710 
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| Author Notes: | Thomas Ernst, Andrew Chase, Katerina Zoi, Katherine Waghorn, Claire Hidalgo-Curtis, Joannah Score, Amy Jones, Francis Grand, Andreas Reiter, Andreas Hochhaus, and Nicholas C.P. Cross |
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| 520 | |a Background Aberrant activation of tyrosine kinases, caused by either mutation or gene fusion, is of major importance for the development of many hematologic malignancies, particularly myeloproliferative neoplasms. We hypothesized that hitherto unrecognized, cytogenetically cryptic tyrosine kinase fusions may be common in non-classical or atypical myeloproliferative neoplasms and related myelodysplastic/myeloproliferative neoplasms.Design and Methods To detect genomic copy number changes associated with such fusions, we performed a systematic search in 68 patients using custom designed, targeted, high-resolution array comparative genomic hybridization. Arrays contained 44,000 oligonucleotide probes that targeted 500 genes including all 90 tyrosine kinases plus downstream tyrosine kinase signaling components, other translocation targets, transcription factors, and other factors known to be important for myelopoiesis.Results No abnormalities involving tyrosine kinases were detected; however, nine cytogenetically cryptic copy number imbalances were detected in seven patients, including hemizygous deletions of RUNX1 or CEBPA in two cases with atypical chronic myeloid leukemia. Mutation analysis of the remaining alleles revealed non-mutated RUNX1 and a frameshift insertion within CEBPA. A further mutation screen of 187 patients with myelodysplastic/myeloproliferative neoplasms identified RUNX1 mutations in 27 (14%) and CEBPA mutations in seven (4%) patients. Analysis of other transcription factors known to be frequently mutated in acute myeloid leukemia revealed NPM1 mutations in six (3%) and WT1 mutations in two (1%) patients with myelodysplastic/myeloproliferative neoplasms. Univariate analysis indicated that patients with mutations had a shorter overall survival (28 versus 44 months, P=0.019) compared with patients without mutations, with the prognosis for cases with CEBPA, NPM1 or WT1 mutations being particularly poor.Conclusions We conclude that mutations of transcription and other nuclear factors are frequent in myelodysplastic/myeloproliferative neoplasms and are generally mutually exclusive. CEBPA, NPM1 or WT1 mutations may be associated with a poor prognosis, an observation that will need to be confirmed by detailed prospective studies. | ||
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| 700 | 1 | |a Zoi, Katerina |e VerfasserIn |4 aut | |
| 700 | 1 | |a Waghorn, Katherine |e VerfasserIn |4 aut | |
| 700 | 1 | |a Hidalgo-Curtis, Claire |e VerfasserIn |4 aut | |
| 700 | 1 | |a Score, Joannah |e VerfasserIn |4 aut | |
| 700 | 1 | |a Jones, Amy |e VerfasserIn |4 aut | |
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