R406 is an orally available and competitive Syk/FLT3 inhibitor for ATP binding with a K_i of 30 nM, potently inhibits Syk kinase activity in vitro with an IC₅₀ of 41 nM, measured at an ATP concentration corresponding to its K_m value. R406 reduces immune complex-mediated inflammation^[1]. R406 also inhibits Lyn (IC₅₀=63 nM) and Lck (IC₅₀=37 nM)^[2].

Ki: 30 nM (Syk)^[1]
IC50: 41 nM (Syk)^[1]
FLT3^[1]
IC50: 63 nM (Lyn), 37 nM (Lck)^[2]

R406 inhibits adenosine A3 receptor (IC₅₀=0.081 µM), adenosine transporter (IC₅₀=1.84 µM), and monoamine transporter (IC₅₀=2.74 µM)^[1].
R406 inhibits Huh7 hepatocyte, A549 epithelial, and H1299 lung cancer lines with EC₅₀s of 15.1, 2.9 and 6.3 µM, respectively^[1].
R406 inhibits phosphorylation of Syk substrate LAT in mast cells and BLNK/SLP65 in B cells^[1].

上海金畔生物科技有限公司 has not independently confirmed the accuracy of these methods. They are for reference only.

R406 (5 and 10 mg/kg) shows efficacy in the amelioration of the Arthus reaction and in reducing clinical symptoms in the collagen antibody-induced arthritis (CAIA) and K/BxN models of rheumatoid arthritis (RA). Immune complex (IC)-mediated inflammation is reduced by inhibition of Fc receptor signaling with R406^[1].

上海金畔生物科技有限公司 has not independently confirmed the accuracy of these methods. They are for reference only.

628.63

C₂₈H₂₉FN₆O₈S

841290-81-1

Room temperature in continental US; may vary elsewhere.

4°C, sealed storage, away from moisture

*In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture)

DMSO : ≥ 61 mg/mL (97.04 mM)

H₂O : < 0.1 mg/mL (ultrasonic;warming;heat to 60°C) (insoluble)

* “≥” means soluble, but saturation unknown.

请根据产品在不同溶剂中的溶解度选择合适的溶剂配制储备液；一旦配成溶液，请分装保存，避免反复冻融造成的产品失效。
储备液的保存方式和期限：-80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture)。-80°C 储存时，请在 6 个月内使用，-20°C 储存时，请在 1 个月内使用。

请根据您的实验动物和给药方式选择适当的溶解方案。以下溶解方案都请先按照 In Vitro 方式配制澄清的储备液，再依次添加助溶剂：

——为保证实验结果的可靠性，澄清的储备液可以根据储存条件，适当保存；体内实验的工作液，建议您现用现配，当天使用； 以下溶剂前显示的百
分比是指该溶剂在您配制终溶液中的体积占比；如在配制过程中出现沉淀、析出现象，可以通过加热和/或超声的方式助溶

• 1.

  请依序添加每种溶剂： 10% DMSO    40% PEG300    5% Tween-80    45% saline

  Solubility: ≥ 2.5 mg/mL (3.98 mM); Clear solution

  此方案可获得 ≥ 2.5 mg/mL (3.98 mM，饱和度未知) 的澄清溶液。

  以 1 mL 工作液为例，取 100 μL 25.0 mg/mL 的澄清 DMSO 储备液加到 400 μL PEG300 中，混合均匀；向上述体系中加入50 μL Tween-80，混合均匀；然后继续加入 450 μL生理盐水定容至 1 mL。

  将 0.9 g 氯化钠，完全溶解于 100 mL ddH₂O 中，得到澄清透明的生理盐水溶液

• 2.

  请依序添加每种溶剂： 10% DMSO    90% (20% SBE-β-CD in saline)

  Solubility: 2.5 mg/mL (3.98 mM); Suspended solution; Need ultrasonic

  此方案可获得 2.5 mg/mL (3.98 mM) 的均匀悬浊液，悬浊液可用于口服和腹腔注射。

  以 1 mL 工作液为例，取 100 μL 25.0 mg/mL 的澄清 DMSO 储备液加到 900 μL 20% 的 SBE-β-CD 生理盐水水溶液中，混合均匀。

  将 2 g 磺丁基醚 β-环糊精加入 5 mL 生理盐水中，再用生理盐水定容至 10 mL，完全溶解，澄清透明

• [1]. Sylvia Braselmann, et al. R406, an orally available spleen tyrosine kinase inhibitor blocks fc receptor signaling and reduces immune complex-mediated inflammation. J Pharmacol Exp Ther. 2006 Dec;319(3):998-1008.

  [2]. Hoon-Suk Cha , et al. A novel spleen tyrosine kinase inhibitor blocks c-Jun N-terminal kinase-mediated gene expression in synoviocytes. J Pharmacol Exp Ther. 2006 May;317(2):571-8.