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Updated: Aug 6, 2026

Transduction-Transplantation Mouse Model of Myeloproliferative Neoplasm
Published on: December 22, 2016
An acquired translocation in JAK2 Val617Phe-negative essential thrombocythemia associated with autosomal spread of
George S Vassiliou1, Peter J Campbell, Juan Li
1Department of Hematology, University of Cambridge, UK.
Abstract:
The acquired mutation Val617Phe in the tyrosine kinase JAK2 was recently identified in most but not all patients with classical myeloproliferative disorders. We describe a cytogenetic and molecular study of a JAK2Val617Phe-negative case of essential thrombocythemia harboring the acquired translocation t(X;5)(q13;q33). We show that this involves the inactive X-chromosome and is associated with silencing of autosomal genes within the adjacent 5q minus syndrome common deleted region. This is the first documented example of autosomal gene silencing adjacent to an X-autosome breakpoint in human malignancy and such a mechanism may underlie the pathogenesis of related disorders with translocations involving Xq13.
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