PRT062607 (P505-15, BIIB057) HCl
Molecular Weight(MW): 429.91
PRT062607 (P505-15, BIIB057) HCl is a novel, highly selective Syk inhibitor with IC50 of 1 nM in cell-free assays, >80-fold selective for Syk than Fgr, Lyn, FAK, Pyk2 and Zap70.
Cited by 6 Publications
5 Customer Reviews
Ptpn6fl/fl and Inpp5dfl/fl ALL cells carrying 4-OHT-inducible Cre (Cre) or an empty vector were pre-treated with PRT062607 (2.5 µmol/L) for 2 days. Deletion of Ptpn6 (i) or Inpp5d (j) was induced by addition of 4-OHT and relative changes of GFP1 cells were monitored by flow cytometry.
Nature, 2015, 521(7552): 357-61. PRT062607 (P505-15, BIIB057) HCl purchased from Selleck.
B cells were stimulated by irradiated CD40L+ L cells. Left: Forward scatter vs. BrdU incorporation analysis (day 5) in the gated CD19+ CLL cells. The distribution of cells with high FSC (blasts, right quadrants) and proliferation (BrdU+, upper quadrants) are shown. Right panel: gated CD19+ CLL cells, stimulated by CD40L in the presence of DMSO or R406 (5 or 50μM). Blastogenesis (%) was calculated by subtracting unstimulated background: stimulated CLL cells [upper right (UR) + lower right (LR) quadrants] – unstimulated CLL cells [UR+LR]. Proliferation (%): stimulated CLL cells [upper left (UL) + upper right (UR)] quadrants)-unstimulated CLL cells [UL+UR]. Wilcoxon signed-rank test, n=10, P<0.006 for all comparisons in (D); no significant differences in (E) (n=10).
Haematologica, 2016, 101(2):e59-62.. PRT062607 (P505-15, BIIB057) HCl purchased from Selleck.
Dectin-1 is involved in activation of NLRP3-inflammasome by Malassezia spp. IL-1b secretion from mature human mono-DCs incubated with Syk-inhibitors (piceatannol, R406 or P505), 1 h prior to exposure to medium, MSU, b-glucan, nigericin or live M. furfur (MOI = 10) was determined after 6 h by ELISA.
Exp Dermatol 2014 23(12), 884-9. PRT062607 (P505-15, BIIB057) HCl purchased from Selleck.
Change of protein and mRNA with or without the pretreatment of Syk inhibitors. After pretreated with PRT062607 and Piceatannol for 30 min before A. fumigatus hyphae stimulation, activation of Syk was inhibited by 1 μM PRT062607 (p < 0.05), 2 μM PRT062607 (p < 0.01), 5 μM Piceatannol (p < 0.05), 10 μM Piceatannol (p < 0.01) a compared with untreated cells. **means p < 0.01, *p < 0.05.
BMC Ophthalmol, 2015, 15:55.. PRT062607 (P505-15, BIIB057) HCl purchased from Selleck.
Purity & Quality Control
Choose Selective Syk Inhibitors
|Description||PRT062607 (P505-15, BIIB057) HCl is a novel, highly selective Syk inhibitor with IC50 of 1 nM in cell-free assays, >80-fold selective for Syk than Fgr, Lyn, FAK, Pyk2 and Zap70.|
PRT062607(P505-15) anti-SYK activity is at least 80-fold greater than its affinity for other kinases. at least 80-fold greater than its affinity for other kinases. PRT062607 potently inhibits B cell antigen receptor-mediated B cell signaling and activation (IC50 0.27 and 0.28 μM, respectively) and Fcε receptor 1-mediated basophil degranulation (IC50 0.15 μM).  PRT062607 inhibits BCR-dependent secretion of the chemokines CCL3 and CCL4 by CLL cells, and leukemia cell migration toward the tissue homing chemokines CXCL12, CXCL13, and beneath stromal cells. PRT062607 furthermore inhibits Syk and extracellular signal-regulated kinase phosphorylation after BCR triggering. 
|In vivo||The pharmacokinetic/pharmacodynamic relationship predicted that 70% Syk suppression is maintained in mice over a 24h period after 30 mg/kg dosing. At 15 mg/kg, Syk inhibition ranges from 7.5% (Cmin) to 78.4% (Cmax) with an average inhibition of 67% over 24 h. Oral administration of PRT062607 produced dose-dependent anti-inflammatory activity in two rodent models of rheumatoid arthritis. Statistically significant efficacy is observed at concentrations that specifically suppressed Syk activity by 67%.|
fluorescence resonance energy transfer (FRET) assay:The extent of substrate phosphorylation by Syk is measured in the presence of various PRT062607 concentrations. Syk activity is determined by a fluorescent antibody specific for phosphorylated tyrosine by using the increase of FRET. Twelve concentrations are tested for dose response. Specificity and potency of kinase inhibition is determined by evaluation of PRT062607 in the Millipore KinaseProfiler panel of 270 independent purified kinase assays. For profiling, PRT062607 is tested in duplicate at two concentrations at a fixed concentration of ATP. Subsequently, IC50 determinations using the radioactive assays are carried out at an ATP concentration optimized for each individual kinase. All radioactive ATP incorporationenzyme assays are performed at Millipore.
|In vitro||DMSO||86 mg/mL (200.04 mM)|
|Water||86 mg/mL (200.04 mM)|
|In vivo||Add solvents to the product individually and in order(Data is from Selleck tests instead of citations):
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Clinical Trial Information
|NCT Number||Recruitment||Conditions||Sponsor/Collaborators||Start Date||Phases|
|NCT01652937||Withdrawn||Rheumatoid Arthritis||Biogen||August 2012||Phase 2|
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