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• W2028334384 abstract "Although other mutations may predate the acquisition of the JAK2V617F mutation, the latter is sufficient to drive the disease phenotype observed in BCR-ABL-negative myeloproliferative neoplasms (MPNs). One of the consequences of JAK2V617F is genetic instability that could explain JAK2V617F-mediated MPN progression and heterogeneity. Here, we show that JAK2V617F induces the accumulation of reactive oxygen species (ROS) in the hematopoietic stem cell compartment of a knock-in (KI) mouse model and in patients with JAK2V617F MPNs. JAK2V617F-dependent ROS elevation was partly mediated by an AKT-induced decrease in catalase expression and was accompanied by an increased number of 8-oxo-guanines and DNA double-strand breaks (DSBs). Moreover, there was evidence for a mitotic recombination event in mice resulting in loss of heterozygosity of Jak2V617F. Mice engrafted with 30% of Jak2V617F KI bone marrow (BM) cells developed a polycythemia vera-like disorder. Treatment with the anti-oxidant N-acetylcysteine (NAC) substantially restored blood parameters and reduced damages to DNA. Furthermore, NAC induced a marked decrease in splenomegaly with reduction in the frequency of the Jak2V617F-positive hematopoietic progenitors in BM and spleen. Altogether, overproduction of ROS is a mediator of JAK2V617F-induced DNA damages that promote disease progression. Targeting ROS accumulation might prevent the development of JAK2V617F MPNs." @default.
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• W2028334384 date "2013-04-05" @default.
• W2028334384 modified "2023-10-18" @default.
• W2028334384 title "A role for reactive oxygen species in JAK2V617F myeloproliferative neoplasm progression" @default.
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• W2028334384 doi "https://doi.org/10.1038/leu.2013.102" @default.
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