Project description:This SuperSeries is composed of the following subset Series: GSE21948: High Density custom Agilent 44K CGH array analysis of 7q and TET2 region in myelodysplastic/myeloproliferative neoplasms GSE21990: Affymetrix SNP 6.0 array data for myelodysplastic/myeloproliferative neoplasms Refer to individual Series
Project description:Model describing how HOXA9 may control the evolution of myeloproliferative neoplasms by integrating the orders of JAK2 and TET2 mutation
Project description:Cardiovascular events are the leading cause of death in patients with JAK2V617F myeloproliferative neoplasms. Their mechanisms are poorly understood. To investigate the role of microvesicles in these events, we performed a proteomic analysis of microvesicles derived from red blood cells from mice with a myeloproliferative neoplasms (Jak2V617F Flex/WT ;VE-cadherin-Cre) vs. littermate controls.
Project description:Myeloproliferative neoplasms (MPNs) are hematological diseases predominantly driven by the JAK2V617F mutation. Progression from chronic-phase MPN to secondary acute myeloid leukemia (sAML) is a severe complication as it dramatically worsens disease prognosis. While sAML transformation is classically linked to MPN clones acquiring additional mutations, the absence of JAK2V617F in sAML cases originating from JAK2-mutant MPNs suggests alternative mechanisms. Utilizing patient samples and in vivo modeling, we establish that sAML clones can emerge independently of JAK2-mutant cells. These leukemic clones undergo positive selection in the pro-inflammatory MPN environment leading to their predominance in the hematopoietic system. Genetic and pharmacological inhibition of IL-12 and TNFa mitigates this competitive advantage. Our data establish a new paradigm and show that disease progression in MPN can arise from parallel acute myeloid leukemia (pAML) clones.