PRT062607(P505-15, PRT-2607, BIIB-057) is a highly specific and potent inhibitor of Syk with IC50 of 1-2 nM, >80-fold selective for Syk than Fgr, Lyn, FAK, Pyk2 and Zap70. IC50 value: 1-2 nM [1] Target:Syk kinase inhibitor in vitro: In human whole blood, P505-15 potently inhibited B cell antigen receptor-mediated B cell signaling and activation (IC50 0.27 and 0.28 µM, respectively) and Fcepsilon receptor 1-mediated basophil degranulation (IC50 0.15 µM) [1]. P505-15 successfully inhibited SYK-mediated B-cell receptor signaling and decreased cell viability in NHL and CLL [2]. PRT318 and P505-15 effectively antagonize CLL cell survival after BCR triggering and in nurse-like cell-co-cultures. Moreover, they inhibit 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. PRT318 and P505-15 furthermore inhibit Syk and extracellular signal-regulated kinase phosphorylation after BCR triggering [3]. in vivo: Similar levels of ex vivo inhibition were measured after dosing in mice (Syk signaling IC50 0.32 µM). Oral administration of P505-15 produced dose-dependent anti-inflammatory activity in two rodent models of rheumatoid arthritis [1]. Oral dosing in mice prevented BCR-mediated splenomegaly and significantly inhibited NHL tumor growth in a xenograft model. In addition, combination treatment of primary CLL cells with P505-15 plus fludarabine produced synergistic enhancement of activity at nanomolar concentrations [2].
Molecular Weight:
393.45
Purity:
99.38
CAS Number:
[1370261-96-3]
Formula:
C19H23N9O
Target:
Syk
Application Notes:
MCE Product type: Reference compound
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