Home Angiogenesis Syk inhibitor Fostamatinib disodium hexahydrate For research use only.

Fostamatinib disodium hexahydrate

Synonyms: Tavalisse, R788 disodium hexahydrate, Tamatinib Fosdium hexahydrate

Fostamatinib (R788) disodium (Tamatinib Fosdium) hexahydrate, a prodrug of the active metabolite R406, is a Syk inhibitor with IC50 of 41 nM in a cell-free assay.

Fostamatinib disodium hexahydrate Chemical Structure

Fostamatinib disodium hexahydrate Chemical Structure

CAS No. 914295-16-2

Purity & Quality Control

Batch: S494401 DMSO]100 mg/mL]false]Water]Insoluble]false]Ethanol]Insoluble]false Purity: 99.8%
99.8

Fostamatinib disodium hexahydrate Related Products

Signaling Pathway

Syk Signaling Pathways

Syk Signaling Pathway

Biological Activity

Description Fostamatinib (R788) disodium (Tamatinib Fosdium) hexahydrate, a prodrug of the active metabolite R406, is a Syk inhibitor with IC50 of 41 nM in a cell-free assay.
Targets
Syk [1]
(Cell-free assay)
41 nM
In vitro
In vitro

R788 is a prodrug of the spleen tyrosine kinase (Syk) inhibitor R406. R788 is a competitive inhibitor for ATP binding with a Ki of 30 nM. R788 dose-dependently inhibits anti-IgE-mediated CHMC degranulation with an EC50 of 56 nM. R788 also inhibits the anti-IgE-induced production and release of LTC4 and cytokines and chemokines, including TNFα, IL-8, and GM-CSF. Inhibition of Syk by R788 results in inhibition of all phosphorylation events downstream of Syk signaling. Next to FcϵRI signaling in CHMC, R788 most potently inhibits the signaling of IL-4 and IL-2 receptors. R788 specifically inhibits FcγR signaling in human mast cells, macrophages, and neutrophils. R788 can inhibit local inflammatory injury mediated by immune complexes.[1] R788 induces apoptosis of the majority of examined DLBCL cell lines. In R788-sensitive DLBCL cell lines, R788 specifically inhibits both tonic- and ligand-induced BCR signaling (autophosphorylation of SYK525/526 and SYK-dependent phosphorylation of the B-cell linker protein [BLNK]).[2]
Kinase Assay Fluorescence polarization kinase assay and Ki determination
The fluorescence polarization reactions are performed. For Ki determination, duplicate 200-μL reactions are set up at eight different ATP concentrations from 200 μM (2-fold serial dilutions) in the presence of either DMSO or R788 at 125, 62.5, 31.25, 15.5, or 7.8 nM. At different time points, 20 μL of each reaction is removed and quenched to stop the reaction. For each concentration of R788, the rate of reaction at each concentration of ATP is determined and plotted against the ATP concentration to determine the apparent Km and Vmax. Finally the apparent Km (or apparent Ki/Vmax) is plotted against the inhibitor concentration to determine the Ki.
Cell Research Cell lines Cultured human mast cells (CHMC)
Concentrations 0-100 μM
Incubation Time 0.5 h
Method

Cultured human mast cells (CHMC) are derived from cord blood CD34+ progenitor cells and grown, primed, and stimulated and shown in supplemental data. Before stimulation, cells are incubated with R788 or DMSO for 30 minutes. Cells are 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 are stimulated for 30 min in modified Tyrode's buffer. For LTC4 and cytokine production, 100,000 cells per well are stimulated for 1 or 7 hours, respectively. Tryptase activity is measured by luminescence readout of a peptide substrate, and LTC4 and cytokines are measured using Luminex multiplex technology.
In Vivo
In vivo

Oral administration of R788 to mice reduces immune complex-mediated inflammation in a reverse-passive Arthus reaction and two antibody-induced arthritis models.[1] In another study, R788 effectively inhibits BCR signaling in vivo, resulting in reduced proliferation and survival of the malignant B cells and significantly prolongs survival of the treated animals.[3] R788 demonstrates a significant reduction in major inflammatory mediators such as TNFalpha, IL-1, IL-6 and IL-18, leading to reduced inflammation and bone degradation in models of rheumatoid arthritis.[4]
Animal Research Animal Models Balb/c mice with arthritis
Dosages 1 mg/kg or 5 mg/kg
Administration o.g.
NCT Number Recruitment Conditions Sponsor/Collaborators Start Date Phases
NCT05904093 Not yet recruiting
Sickle Cell Disease|Hb-SS Disease|Hemoglobin S|Disease Sickle Cell Anemia|Sickle Cell Disorders|Hemoglobin Beta Thalassemia Disease
National Heart Lung and Blood Institute (NHLBI)|National Institutes of Health Clinical Center (CC)
 May 15 2024 Phase 1
NCT05509582 Enrolling by invitation
Immune Mediated Anemia|Immune Mediated Thrombocytopenia|Chronic GVHD
National Heart Lung and Blood Institute (NHLBI)|National Institutes of Health Clinical Center (CC)
 May 15 2024 Phase 2
NCT06071520 Completed
Primary Immune Thrombocytopenia
Fundación Pública Andaluza para la gestión de la Investigación en Sevilla
 March 1 2023 --
NCT05613296 Not yet recruiting
ITP - Immune Thrombocytopenia|Chronic ITP|Refractory ITP
Gruppo Italiano Malattie EMatologiche dell''Adulto
 February 2023 --
NCT04543279 Terminated
Myelofibrosis|Thrombocytopenia
Washington University School of Medicine|Rigel Pharmaceuticals
 May 3 2021 Phase 2
NCT04904276 Terminated
ITP|Immune Thrombocytopenia
Rigel Pharmaceuticals
 May 18 2021 --

Chemical Information & Solubility

Molecular Weight 732.51 Formula

C23H36FN6Na2O15P
CAS No. 914295-16-2 SDF --
Smiles O.O.O.O.O.O.[Na+].[Na+].COC1=CC(=CC(=C1OC)OC)NC2=NC=C(F)C(=N2)NC3=NC4=C(OC(C)(C)C(=O)N4CO[P]([O-])([O-])=O)C=C3
Storage (From the date of receipt) 3 years -20°C powder

In vitro
Batch:

DMSO : 100 mg/mL ( (136.51 mM) Moisture-absorbing DMSO reduces solubility. Please use fresh DMSO.)

Water : Insoluble

Ethanol : Insoluble


Molecular Weight Calculator

In vivo
Batch:

Add solvents to the product individually and in order.


In vivo Formulation Calculator

Preparing Stock Solutions

Molarity Calculator

Mass Concentration Volume Molecular Weight

In vivo Formulation Calculator (Clear solution)

Step 1: Enter information below (Recommended: An additional animal making an allowance for loss during the experiment)

mg/kg g μL

Step 2: Enter the in vivo formulation (This is only the calculator, not formulation. Please contact us first if there is no in vivo formulation at the solubility Section.)

% DMSO % % Tween 80 % ddH2O
%DMSO %

Calculation results:

Working concentration: mg/ml;

Method for preparing DMSO master liquid: mg drug pre-dissolved in μL DMSO ( Master liquid concentration mg/mL, Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug. )

Method for preparing in vivo formulation: Take μL DMSO master liquid, next addμL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O, mix and clarify.

Method for preparing in vivo formulation: Take μL DMSO master liquid, next add μL Corn oil, mix and clarify.

Note: 1. Please make sure the liquid is clear before adding the next solvent.
2. Be sure to add the solvent(s) in order. You must ensure that the solution obtained, in the previous addition, is a clear solution before proceeding to add the next solvent. Physical methods such
as vortex, ultrasound or hot water bath can be used to aid dissolving.

Tech Support

Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.

Handling Instructions

Tel: +1-832-582-8158 Ext:3
If you have any other enquiries, please leave a message.

* Indicates a Required Field

Please enter your name.
Please enter your email. Please enter a valid email address.
Please write something to us.
Tags: buy Fostamatinib disodium hexahydrate | Fostamatinib disodium hexahydrate supplier | purchase Fostamatinib disodium hexahydrate | Fostamatinib disodium hexahydrate cost | Fostamatinib disodium hexahydrate manufacturer | order Fostamatinib disodium hexahydrate | Fostamatinib disodium hexahydrate distributor