Circulating angiogenic monocyte progenitor cells are reduced in JAK2V617F high allele burden myeloproliferative disorders

Blood Cells, Molecules & Diseases
Selcuk SozerRonald Hoffman

Abstract

The clinical course of patients with Philadelphia chromosome negative myeloproliferative disorder is frequently complicated by thrombotic events. Post-natal vasculogenesis has been proposed to play a critical role in angiogenesis by acting through a hierarchy of endothelial progenitor cells. Some endothelial progenitor cells have been shown to share a number of features associated with monocytes while other more primitive progenitor cells produce endothelial cells in vitro exclusively. The cells which share features of monocytes and endothelial cells have been termed angiogenic monocytes. Reduced levels of angiogenic monocyte progenitor cells have been reported to be predictive of atherosclerotic disease progression. Angiogenic monocyte progenitor cells were assayed in vitro from the peripheral blood mononuclear cells of myeloproliferative disorder patients. Angiogenic monocyte colonies were plucked and analyzed for endothelial cells and hematopoietic cell markers, JAK2V617F and their ability to incorporate into vascular endothelium following their transplantation into non-obese diabetic, severe combine immunodeficient mice. Myeloproliferative disorder angiogenic monocyte colonies that were detected were uniformly JAK2V617F pos...Continue Reading

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