R788 disodium

Syk inhibitor,ATP competitive and potent CAS# 1025687-58-4

R788 disodium

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R788 disodium: 5mg $104 In Stock
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R788 disodium

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Chemical Properties of R788 disodium

Cas No. 1025687-58-4 SDF Download SDF
PubChem ID 25008120 Appearance Powder
Formula C23H24FN6Na2O9P M.Wt 624.42
Type of Compound N/A Storage Desiccate at -20°C
Synonyms Fostamatinib Disodium
Solubility DMSO : 50 mg/mL (80.07 mM; Need ultrasonic)
Chemical Name disodium;[6-[[5-fluoro-2-(3,4,5-trimethoxyanilino)pyrimidin-4-yl]amino]-2,2-dimethyl-3-oxopyrido[3,2-b][1,4]oxazin-4-yl]methyl phosphate
SMILES CC1(C(=O)N(C2=C(O1)C=CC(=N2)NC3=NC(=NC=C3F)NC4=CC(=C(C(=C4)OC)OC)OC)COP(=O)([O-])[O-])C.[Na+].[Na+]
Standard InChIKey HSYBQXDGYCYSGA-UHFFFAOYSA-L
Standard InChI InChI=1S/C23H26FN6O9P.2Na/c1-23(2)21(31)30(11-38-40(32,33)34)20-14(39-23)6-7-17(28-20)27-19-13(24)10-25-22(29-19)26-12-8-15(35-3)18(37-5)16(9-12)36-4;;/h6-10H,11H2,1-5H3,(H2,32,33,34)(H2,25,26,27,28,29);;/q;2*+1/p-2
General tips For obtaining a higher solubility , please warm the tube at 37 ℃ and shake it in the ultrasonic bath for a while.Stock solution can be stored below -20℃ for several months.
We recommend that you prepare and use the solution on the same day. However, if the test schedule requires, the stock solutions can be prepared in advance, and the stock solution must be sealed and stored below -20℃. In general, the stock solution can be kept for several months.
Before use, we recommend that you leave the vial at room temperature for at least an hour before opening it.
About Packaging 1. The packaging of the product may be reversed during transportation, cause the high purity compounds to adhere to the neck or cap of the vial.Take the vail out of its packaging and shake gently until the compounds fall to the bottom of the vial.
2. For liquid products, please centrifuge at 500xg to gather the liquid to the bottom of the vial.
3. Try to avoid loss or contamination during the experiment.
Shipping Condition Packaging according to customer requirements(5mg, 10mg, 20mg and more). Ship via FedEx, DHL, UPS, EMS or other couriers with RT, or blue ice upon request.

Biological Activity of R788 disodium

DescriptionR788 (Fostamatinib) disodium, a prodrug of the active metabolite R406, is an inhibitor of Syk with IC50 of 41 nM.
TargetsSyk    
IC5041 nM     

R788 disodium Dilution Calculator

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R788 disodium Molarity Calculator

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Preparing Stock Solutions of R788 disodium

1 mg 5 mg 10 mg 20 mg 25 mg
1 mM 1.6015 mL 8.0074 mL 16.0149 mL 32.0297 mL 40.0372 mL
5 mM 0.3203 mL 1.6015 mL 3.203 mL 6.4059 mL 8.0074 mL
10 mM 0.1601 mL 0.8007 mL 1.6015 mL 3.203 mL 4.0037 mL
50 mM 0.032 mL 0.1601 mL 0.3203 mL 0.6406 mL 0.8007 mL
100 mM 0.016 mL 0.0801 mL 0.1601 mL 0.3203 mL 0.4004 mL
* Note: If you are in the process of experiment, it's necessary to make the dilution ratios of the samples. The dilution data above is only for reference. Normally, it's can get a better solubility within lower of Concentrations.

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Background on R788 disodium

R788, which is the prodrug of R406, is a potnet and selective Syk inhibitor. The spleen tyrosine kinase (Syk) plays a key role in the signaling of activating Fc receptors and the B-cell receptor (BCR).

In vitro: R406 was found to induce the apoptosis of the majority of examined DLBCL cell lines and could specifically inhibit both tonic- and ligand-induced BCR signaling (autophosphorylation of SYK525/526 and SYKdependent phosphorylation of the B-cell linker protein [BLNK]) [1].

In vivo: R788 effectively inhibits BCR signaling, demonstrating reduced proliferation and survival of the malignant B cells and significantly prolonged survival of the treated Eμ-TCL1 transgenic mouse. Moreover, the effect of R788 was found to be selective for the malignant clones, since no disturbance in the production of normal B lymphocytes was observed [2].

Clinical trial: In a phase II clinical trial, R788 treatment effectively improved American College of Rheumatology response rates in patients with eumatoid arthritis [3].

References:
[1] Chen L, Monti S, Juszczynski P, Daley J, Chen W, Witzig TE, Habermann TM, Kutok JL, Shipp MA.  SYK-dependent tonic B-cell receptor signaling is a rational treatment target in diffuse large B-cell lymphoma. Blood. 2008 Feb 15;111(4):2230-7.
[2] Suljagic M, Longo PG, Bennardo S, Perlas E, Leone G, Laurenti L, Efremov DG.  The Syk inhibitor fostamatinib disodium (R788) inhibits tumor growth in the Eμ- TCL1 transgenic mouse model of CLL by blocking antigen-dependent B-cell receptor signaling. Blood. 2010 Dec 2;116(23):4894-905.
[3] Bajpai M.  Fostamatinib, a Syk inhibitor prodrug for the treatment of inflammatory diseases. IDrugs. 2009 Mar;12(3):174-85.

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References on R788 disodium

The Syk inhibitor fostamatinib disodium (R788) inhibits tumor growth in the Emu- TCL1 transgenic mouse model of CLL by blocking antigen-dependent B-cell receptor signaling.[Pubmed:20716772]

Blood. 2010 Dec 2;116(23):4894-905.

Inhibition of antigen-dependent B-cell receptor (BCR) signaling is considered a promising therapeutic approach in chronic lymphocytic leukemia (CLL), but experimental in vivo evidence to support this view is still lacking. We have now investigated whether inhibition of BCR signaling with the selective Syk inhibitor fostamatinib disodium (R788) will affect the growth of the leukemias that develop in the Emu-TCL1 transgenic mouse model of CLL. Similarly to human CLL, these leukemias express stereotyped BCRs that react with autoantigens exposed on the surface of senescent or apoptotic cells, suggesting that they are antigen driven. We show that R788 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. The growth-inhibitory effect of R788 occurs despite the relatively modest cytotoxic effect in vitro and is independent of basal Syk activity, suggesting that R788 functions primarily by inhibiting antigen-dependent BCR signals. Importantly, the effect of R788 was found to be selective for the malignant clones, as no disturbance in the production of normal B lymphocytes was observed. Collectively, these data provide further rationale for clinical trials with R788 in CLL and establish the BCR-signaling pathway as an important therapeutic target in this disease.

Description

Fostamatinib Disodium (R788 Disodium), a prodrug of the active metabolite R406, is a potent Syk inhibitor with IC50 of 41 nM.

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