Name: R788 (Fostamatinib) Disodium
Brand: Selleck Chemicals
SKU: S2206
Rating: 5 (20 reviews)

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Contrôle Qualité (Quality Control)

Lot : Pureté : 99.99%

99.99

Cibles apparentées	EGFR VEGFR JAK FGFR PDGFR Src HIF FLT3 HER2 FLT
Autre Syk Inhibiteurs	R406 R406 (free base) PRT062607 (P505-15) HCl Entospletinib (GS-9973) Piceatannol BAY 61-3606 dihydrochloride PRT-060318 2HCl TAK-659 Hydrochloride Lanraplenib (GS-SYK) RO9021

Culture cellulaire, traitement et concentration de travail
(Cell Culture, Treatment & Working Concentration)

Lignées cellulaires	Type d'essai	Description de l'activité	PMID
Ramos	Function assay	Inhibition of SYK in human Ramos cells, IC50 = 0.267 μM.	23350847
SJ-GBM2	qHTS assay	qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for SJ-GBM2 cells	29435139
A673	qHTS assay	qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for A673 cells	29435139
SK-N-MC	qHTS assay	qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for SK-N-MC cells	29435139
NB-EBc1	qHTS assay	qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for NB-EBc1 cells	29435139
U-2 OS	qHTS assay	qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for U-2 OS cells	29435139
Saos-2	qHTS assay	qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for Saos-2 cells	29435139
SK-N-SH	qHTS assay	qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for SK-N-SH cells	29435139
NB1643	qHTS assay	qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for NB1643 cells	29435139
LAN-5	qHTS assay	qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for LAN-5 cells	29435139
Rh18	qHTS assay	qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for Rh18 cells	29435139
OHS-50	qHTS assay	qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for OHS-50 cells	29435139
RD	qHTS assay	qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for RD cells	29435139
MG 63 (6-TG R)	qHTS assay	qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for MG 63 (6-TG R) cells	29435139
Rh41	qHTS assay	qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for Rh41 cells	29435139
NB1643	qHTS assay	qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for NB1643 cells	29435139
A673	qHTS assay	qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for A673 cells)	29435139
SK-N-MC	qHTS assay	qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for SK-N-MC cells	29435139
LAN-5	qHTS assay	qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for LAN-5 cells	29435139
DAOY	qHTS assay	qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for DAOY cells	29435139
BT-37	qHTS assay	qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for BT-37 cells	29435139
TC32	qHTS assay	qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for TC32 cells	29435139
MG 63 (6-TG R)	qHTS assay	qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for MG 63 (6-TG R) cells	29435139
U-2 OS	qHTS assay	qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for U-2 OS cells	29435139
Rh41	qHTS assay	qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for Rh41 cells	29435139
RD	qHTS assay	qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for RD cells	29435139
Rh30	qHTS assay	qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for Rh30 cells	29435139
Saos-2	qHTS assay	qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for Saos-2 cells	29435139
OHS-50	qHTS assay	qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for OHS-50 cells	29435139
SK-N-SH	qHTS assay	qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Confirmatory screen for SK-N-SH cells	29435139
Cliquez pour voir plus de données expérimentales sur la lignée cellulaire

Informations chimiques, stockage et stabilité (Chemical Information, Storage & Stability)

Poids moléculaire	624.42	Formule	C₂₃H₂₄FN₆O₉P.2Na	Stockage (À compter de la date de réception)	3 ans-20°Cpoudre
N° CAS	1025687-58-4	Télécharger le SDF		Stockage des solutions mères	1 an-80°Cen solvant 1 mois-20°Cen solvant
Synonymes	Tamatinib Fosdium			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+]

Solubilité (Solubility)

In vitro
Lot:

DMSO : 12 mg/mL (19.21 mM)
(Le DMSO contaminé par l'humidité peut réduire la solubilité. Utiliser du DMSO frais et anhydre.)

Water : Insoluble

Ethanol : Insoluble

Calculateur de molarité

Masse	Concentration	Volume	Poids moléculaire
=	×	×

Calculateur de dilution Calculateur de poids moléculaire

In vivo Lot:
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Clear solution	5%DMSO 1 Corn oil Validé par les laboratoires Selleck. Si vous avez besoin d'ajustements à cette formulation, contactez notre équipe commerciale pour des tests personnalisés.	5.000mg/ml (8.01mM)	Taking the 1 mL working solution as an example, add 50 μL of 100 mg/ml clear DMSO stock solution to 950 μL of corn oil and mix evenly. The mixed solution should be used immediately for optimal results.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.

Calculateur de formulation in vivo (Solution claire)

Étape 1 : Saisir les informations ci-dessous (Recommandé : Un animal supplémentaire pour tenir compte des pertes pendant l'expérience)

Dosage : mg/kg Poids moyen des animaux : g Volume de dosage par animal :μL Nombre d'animaux :

Étape 2 : Saisir la formulation in vivo (Ceci est seulement le calculateur, pas la formulation. Veuillez nous contacter d'abord s'il n'y a pas de formulation in vivo dans la section Solubilité.)

% DMSO + % + % Tween 80 + % ddH₂O

%DMSO+ %

Résultats du calcul :

Concentration de travail : mg/ml;

Méthode de préparation du liquide maître DMSO : mg médicament prédissous dans μL DMSO ( Concentration du liquide maître mg/mL, Veuillez nous contacter d'abord si la concentration dépasse la solubilité du DMSO du lot de médicament. )

Méthode de préparation de la formulation in vivo : Prendre μL DMSO liquide maître, puis ajouterμL PEG300, mélanger et clarifier, puis ajouterμL Tween 80, mélanger et clarifier, puis ajouter μL ddH₂O, mélanger et clarifier.

Méthode de préparation de la formulation in vivo : Prendre μL DMSO liquide maître, puis ajouter μL Huile de maïs, mélanger et clarifier.

Note : 1. Veuillez vous assurer que le liquide est clair avant d'ajouter le solvant suivant.
2. Assurez-vous d'ajouter le(s) solvant(s) dans l'ordre. Vous devez vous assurer que la solution obtenue, lors de l'ajout précédent, est une solution claire avant de procéder à l'ajout du solvant suivant. Des méthodes physiques telles que le vortex, les ultrasons ou le bain-marie chaud peuvent être utilisées pour faciliter la dissolution.

Mécanisme d'action (Mechanism of Action)

Caractéristiques	Clinically used oral formulation of R406.
Targets/IC₅₀/Ki	Syk (Cell-free assay) 41 nM
In vitro	R935788 is a methylene phosphate prodrug of R406, which can be rapidly converted to R406 in vivo. R406 (in vitro active form of R935788) selectively inhibits Syk-dependent signaling with EC50 values ranging from 33 nM to 171 nM, more potently than Syk-independent pathways in different cells. R406 inhibits cellular proliferation of a variety of diffuse large B-cell lymphoma (DLBCL) cell lines with EC50 values ranging from 0.8 μM to 8.1 μM. R406 treatment reduces basal phosphorylation of BLNK, Akt, glycogen synthase kinase-3 (GSK-3), forkhead box O (FOXO) and ERK not only in cells with high (TCL-002) but also in cells with low levels of phosphorylated Syk (TCL1-551). In addition, R406 completely inhibits the anti-IgM induced Bcr signal in TCL1 leukemias. Despite the higher levels of constitutively active Syk in TCL1 leukemias, R406 is not selectively cytotoxic to the leukemic cells.
Essai kinase	Essais de kinases par polarisation de fluorescence in vitro
Essai kinase	Le R406 (forme active in vitro du R935788) est dilué en série dans du DMSO puis dilué à 1% de DMSO dans un tampon kinase (20 mM HEPES, pH 7,4, 5 mM MgCl₂, 2 mM MnCl₂, 1 mM DTT, 0,1 mg/mL de BGG acétylé). L'ATP et le substrat dans le tampon kinase sont ajoutés à température ambiante, ce qui entraîne une concentration finale de DMSO de 0,2%. Les réactions de kinase sont réalisées dans un volume final de 20 μL contenant 5 μM de substrat peptidique HS1 et 4 μM d'ATP et sont initiées par l'addition de 0,125 ng de Syk dans le tampon kinase. La réaction est laissée se dérouler pendant 40 minutes à température ambiante. La réaction est arrêtée par l'addition de 20 μL d'un mélange d'extinction PTK contenant de l'EDTA/anticorps anti-phosphotyrosine (1× final)/traceur phosphopeptidique fluorescent (0,5× final) dilué dans un tampon de dilution FP. La plaque est incubée pendant 30 minutes dans l'obscurité à température ambiante puis lue sur un lecteur de plaque à polarisation de fluorescence Polarion. Les données sont converties pour déterminer la quantité de phosphopeptide présent à l'aide d'une courbe d'étalonnage générée par compétition avec le compétiteur phosphopeptidique fourni dans le kit d'essai de la tyrosine kinase. Pour la détermination de l'IC50, le R406 est testé à onze concentrations en double et l'ajustement de la courbe est réalisé par analyse de régression non linéaire à l'aide du logiciel Prism GraphPad.
In vivo	Given that plasma half-life of R406 in mice is less than 2 hours, R935788 is administered in 3 divided doses at 3-hour intervals to provide continuous Syk inhibition during each day of treatment, mimicking the longer plasma half-life in humans (15 hours). Despite the relatively modest cytotoxic effect in vitro, R935788 significantly inhibits the proliferation and survival of leukemic cell in vivo, which is associated with the blocking of antigen-dependent B-cell receptor (Bcr) signaling rather than inhibition of constitutive Syk activity. R935788 treatment at 80 mg/kg/day for 18-21 days potently inhibits tumor growth of TCL1-002, TCL1-551 and TCL1-870 in mice with undetectable leukemic CD5⁺/B220⁺ cells at the last day of treatment, significantly prolongs the survival of the treated mice with median survival increased from 45/46 days to 170/172 days, and completely eradicates the malignant cells in a substantial proportion of mice after a 6-month follow-up period without affecting the production of normal B lymphocytes. R935788 treatment also induces an early and transient migration of both normal and malignant B cells from spleen and lymph nodes to peripheral blood, which is subsequently followed by selective growth inhibition of the malignant B-cell population. In addition, R935788 is also effective against spontaneously developing TCL1 leukemias in Eμ-TCL1 transgenic mice.
Références	[1] https://pubmed.ncbi.nlm.nih.gov/16946104/ [2] https://pubmed.ncbi.nlm.nih.gov/18006696/ [3] https://pubmed.ncbi.nlm.nih.gov/20716772/

Applications (Applications)

Méthodes	Biomarqueurs	Images	PMID
Western blot	p-JAK2 / JAK2 / p-SRC / SRC / p-FAK / FAK / p-SYK / SYK / p-ERK / ERK p-SYK(525-526) / t-SYK / p-SYK(323) / p-BTK / t-BTK p-MEK / MEK / p-ERK / ERK / p-AKT / AKT		29340070
Growth inhibition assay	Cell viability		25748087

Informations sur l'essai clinique (Clinical Trial Information)

(données du https://clinicaltrials.gov, mis à jour le 2026-01-22)

Numéro NCT	Recrutement	Conditions	Promoteur/Collaborateurs	Date de début	Phases
NCT06233110	RECRUITING	Chronic Graft Versus Host Disease	Stefanie Sarantopoulos, MD, PhD.	2025-10-29	PHASE1
NCT06948097	RECRUITING	Lung Transplantation	National Heart, Lung, and Blood Institute (NHLBI)	2026-09-09	PHASE1
NCT06639724	RECRUITING	Pancreatic Ductal Adenocarcinoma (PDAC)	University of California, San Diego	2024-12-05	PHASE1
NCT06564207	NOT_YET_RECRUITING	Acute Respiratory Distress Syndrome; ARDS	Inova Health Care Services	2026-08-30	PHASE2
NCT05904093	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)	2024-12-18	PHASE1
NCT05509582	WITHDRAWN	Immune Mediated Anemia; Immune Mediated Thrombocytopenia; Chronic GVHD	National Heart, Lung, and Blood Institute (NHLBI)	2025-11-07	PHASE2

Foire aux questions (Frequently Asked Questions)

Question 1:
What’s the difference between S2625 and S2206?

Réponse :
The differences between S2625 and S2206: 1. S2206 is more stable than S2625; 2. The water solubility of S2206 is better than S2625; 3. The absorption of S2206 is harder than S2625, so you need to test the suitable dosage if you use it in animal assays; 4. The potency of S2206 and S2625 is similar.

C1=C0/X	C1:	LOG(C1):
C2=C1/X	C2:	LOG(C2):
C3=C2/X	C3:	LOG(C3):
C4=C3/X	C4:	LOG(C4):
C5=C4/X	C5:	LOG(C5):
C6=C5/X	C6:	LOG(C6):
C7=C6/X	C7:	LOG(C7):
C8=C7/X	C8:	LOG(C8):

R788 (Fostamatinib) Disodium Syk Inhibiteur

Poids moléculaire: 624.42

Contrôle Qualité (Quality Control)

Culture cellulaire, traitement et concentration de travail
(Cell Culture, Treatment & Working Concentration)

Informations chimiques, stockage et stabilité (Chemical Information, Storage & Stability)

Solubilité (Solubility)

Calculateur de molarité

Calculateur de formulation in vivo (Solution claire)

Mécanisme d'action (Mechanism of Action)

Applications (Applications)

Informations sur l'essai clinique (Clinical Trial Information)

Foire aux questions (Frequently Asked Questions)

R788 (Fostamatinib) Disodium Syk Inhibiteur

Poids moléculaire: 624.42

Contrôle Qualité (Quality Control)

Culture cellulaire, traitement et concentration de travail (Cell Culture, Treatment & Working Concentration)

Informations chimiques, stockage et stabilité (Chemical Information, Storage & Stability)

Solubilité (Solubility)

Calculateur de molarité

Calculateur de formulation in vivo (Solution claire)

Mécanisme d'action (Mechanism of Action)

Applications (Applications)

Informations sur l'essai clinique (Clinical Trial Information)

Foire aux questions (Frequently Asked Questions)

Culture cellulaire, traitement et concentration de travail
(Cell Culture, Treatment & Working Concentration)