Cytokine necrosis factor Conservative and IL-6 (TNF)- that are involved in the pathogenesis of MPN. Results of a Phase I dose-escalation study with an initial dose of 25 mg twice t Resembled showed INCB018424 Figure 1 Ver published chemical structures of JAK2 inhibitors in clinical development: A) INCB018424, B) CEP-701, C) TG101348. Gamma-Secretase Inhibitors unprecedented Ma of reduction of splenomegaly and improvement of symptoms my verfassungsm cent in the vast majority of patients, independent ngig of JAK2 mutation status. 25 The dose-limiting toxicity t of the molecule was thrombocytopenia, which are related to the inhibition of the signaling thrombopo Retina, which requires JAK2. And pharmacodynamic biomarker studies with INCB018424 in MF patients showed a normalization of the exaggerated STAT3 signaling and the suppression of the most important pro-inflammatory cytokines such as IL-1, TNF- And the IL -6 and angiogenic factors and fibrinogen to the vascular Ren endothelial growth factor (VEGF) and basic fibroblast growth factor (bFGF). 25 This study was expanded in Phase II to assess INCB018424 with different dosages and Zeitpl Ne and has so far collected more than 150 patients. 26 To date, investigators observed a marked and sustained clinical. Preferences INDICATIVE clinical findings in some studies with JAK2 inhibitors.- Advantages (L Longer than 1 year), including normal reduction of splenomegaly, an alleviation of the symptoms my strength verfassungsm, K body weight increased, and the reduction of the concentration of plasma cytokines and angiogenic and proinflamatory growth factors in most patients. 26-28 Despite significant improvements in treated patients with clinical INCB018424, the burden of JAK2V617F allele was only slightly (13% in the bone marrow and 9% in the peripheral blood) reduced, suggesting that the clinical benefits of rapid treatment can be INCB018424 by Inhibition of aberrant JAK2 reductions and, perhaps, JAK1 signaling and result in levels of cytokines are pleased t, that thanks to the reduction of the mutant allele burden. 29 INCB018424 phase III trials for the approval were recently launched in the U.S. and Europe to life.

CEP-701 CEP-701 (lestaurtinib) is a derivative of indolocarbazole K252 is an analogue of straurosporine (1). It has been shown the inhibitory effect of the JAK2 kinase (IC 50 = 1 nM), additionally Confinement tzlich to a number of other kinases, Lich FLT-3, RET and Trk-A. 30 CEP-701 in a series of in vitro assays using cell engineering, such as BaF  3 cells, JAK2V617F, cell lines such as HEL cells and primary Re cells from patients NPP. CEP-701 inhibits the growth of HEL cells (abh Ngig of the activity t of JAK2 mutated) in vitro and in xenograft model. Erythro-cells Were extended primary rfarben From CD34 + cells from patients with MPN by CEP-701 prevented at concentrations of 1 nm or more in 15 of 18 patients with a concomitant inhibition of phosphorylation of STAT5 and other downstream effectors of JAK2. In contrast, cell growth was erythro Derivatives of 3 healthy controls do not significantly inhibited. Before the 30 Phase II trials in the MPN was CEP-701 in a number of oncology clinical trials that established the dose of 8 g twice a mouth, as recommended for testing evaluated malignant h Dermatological disease. dyphylline CEP-701 in patients with MF, PV and positively tested for the ET JAK2V617F mutation. In the study, 22 patients were re-MF U CEP-701, which had been treated, most (90%), pr Sented with splenomegaly (90% of patients) with an average size E from the left costal margin 19 cm, and with an average load of the allele 53%.

Eight patients (36%) were transfusion dependent Ngig study. The median time to degree was 4 months and responses in 6 patients (27%) were observed, according to the International Working Group for Myelofibrosis Research and Treatment Centers spinal cord (IWG-MRT) criteria. All responses were defined as clinical improvement by the IWG-MRT criteria and consisted of reducing the size E of the spleen in only 3 patients, transfusion independence Dependence in two patients.