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Fostamatinib (R788) is a precursor of the active compound tamatinib (R-406), which is an inhibitor of the enzyme spleen tyrosine kinase (Syk). R788 (Fostamatinib) effectively inhibits BCR signaling in vivo, resulting in reduced proliferation and survival of the malignant B cells and significantly prolonged survival of the treated animals. R788 also inhibits the anti-IgE-induced production and release of LTC4 and cytokines and chemokines, including TNFα, IL-8 and GM-CSF. R788 (Fostamatinib) induces apoptosis of the majority of examined DLBCL cell lines.
Cell Experiment | |
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Cell lines | Cultured human mast cells (CHMC) |
Preparation method | Human Mast Cell Culture and Stimulation. Cultured human mast cells (CHMC) were derived from cord blood CD34+ progenitor cells and grown, primed, and stimulated as described previously (Rossi et al., 2006) and shown in supplemental data. Before stimulation, cells were incubated with R406 or DMSO for 30 min. Cells were then stimulated with either 0.25 to 2 mg/ml anti-IgE or anti-IgG or 2 μM ionomycin. For tryptase measurement, ∼1500 cells per well were stimulated for 30 min in modified Tyrode's buffer. For LTC4 and cytokine production, 100,000 cells per well were stimulated for 1 or 7 h, respectively. Tryptase activity was measured by luminescence readout of a peptide substrate, and LTC4 and cytokines were measured using Luminex multiplex technology. |
Concentrations | 0~20 μM |
Incubation time | 30 min |
Animal Experiment | |
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Animal models | K/BxN Model Arthritis induced in C57BL/6 mice |
Formulation | 35% TPGS, 60% PEG 400, and 5% propylene glycol |
Dosages | 5 and 10mg/kg b.i.d for 13 days |
Administration | orally |
Molecular Weight | 580.46 |
Formula | C23H26FN6O9P |
CAS Number | 901119-35-5 |
Solubility (25°C) | DMSO 60 mg/mL |
Storage |
Powder -20°C 3 years ; 4°C 2 years In solvent -80°C 6 months ; -20°C 1 month |
Related Syk Products |
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GSK143 is an orally active and highly selective spleen tyrosine kinase (SYK) inhibitor with a pIC50 of 7.5. |
PRT062607
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. |
GSK143 dihydrochloride
GSK143 dihydrochloride is an orally active and highly selective spleen tyrosine kinase (SYK) inhibitor with a pIC50 of 7.5. |
Syk Kinase Peptide Substrate
Syk Kinase Peptide Substrate is a Syk kinase peptide substrate. |
TOP1288
TOP1288 is an SRC/Syk/p38α inhibitor for studies related to ulcerative colitis. |
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