The JAK2 V617F activating tyrosine kinase mutation is an infrequent event in both "atypical" myeloproliferative disorders and myelodysplastic syndromes.

作者: David P. Steensma , Gordon W. Dewald , Terra L. Lasho , Heather L. Powell , Rebecca F. McClure

DOI: 10.1182/BLOOD-2005-03-1183

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摘要: A somatic mutation in the JH2 autoinhibitory domain of Janus kinase 2 (JAK2) tyrosine was recently described polycythemia vera, essential thrombocythemia, and myelofibrosis with myeloid metaplasia. The prevalence this either “atypical” myeloproliferative disorders (MPDs) or myelodysplastic syndromes (MDSs) is unknown. Bone marrow–derived genomic DNA from 245 patients—119 chronic myelomonocytic leukemia (CMML), 101 MDS, 11 hypereosinophilic syndrome (HES), 8 systemic mastocytosis (SM), 6 neutrophilic (CNL)—was screened for JAK2 V617F mutation. mutant allele detected patients: 3 CMML (3%), 5 MDS (5%), SM, 1 CNL. Interestingly, one patients SM patient CNL had a history lymphoma, also associated CMML. current observation strengthens specific association between classic MPD, but suggests an infrequent occurrence other disorders.

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