GSK 2830371 is a highly selective Wip1 phosphatase inhibitor with IC₅₀ of 6 nM.

IC50: 6 nM (Wip1 phosphatase)^[1]

GSK 2830371 potently inhibits Wip1 (2-420) dephosphorylation of FDP and the endogenous substrates phospho-p38 MAPK (T180) with IC₅₀ values of 6 nM and 13 nM, respectively. In the PPM1D-amplified MCF7 breast carcinoma cells, treatment with GSK 2830371 (0.04, 0.11, 0.33, 1, 3, and 9 μM) increased phosphorylation of substrates in a concentration-dependent manner. Treatment of MX-1 and MCF7 cells (Wip1amplified, p53 wild type) with GSK 2830371 (0.001, 0.01, 0.1, 1, and 10 μM) causes concentration-dependent effects in cell growth assays^[1]. GSK2830371 has a 50% growth inhibitory concentration (GI₅₀) of 2.65 μM±0.54 (SEM) in MCF-7 cells. Treatment of MCF-7 cells with 2.5μM GSK2830371 results in marked time-dependent degradation of both isoforms of WIP1 over 8 hours which correlated with p53 stabilisation and phospho-p53^Ser15 (pp53^Ser15)^[2].

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.

In a pharmacodynamic assay, orally administered GSK 2830371 increases phosphorylation of Chk2 (T68) and p53 (S15) and decreased Wip1protein concentrations in DOHH2 tumors. Following 14 d of oral dosing at 150 mg per kg body weight, BID (twice daily) and TID (thrice daily), GSK 2830371 inhibits the growth of DOHH2 tumor xenografts by 41% and 68%, respectively. Comparable tumor growth inhibition is observed in mice treated BID with either 75 or 150 mg per kg body weight. Greater tumor growth inhibition with the TID schedule is consistent with a short half-life of GSK 2830371 in mice and suggests that sustained inhibition of Wip1 may be required for maximal antitumor effect^[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.

461.02

C₂₃H₂₉ClN₄O₂S

1404456-53-6

Room temperature in continental US; may vary elsewhere.

Powder	-20°C	3 years
	4°C	2 years
In solvent	-80°C	6 months
	-20°C	1 month

In Vitro: 

DMSO : ≥ 51 mg/mL (110.62 mM)

* “≥” 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。-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。

In Vivo:

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 (5.42 mM); Clear solution

  此方案可获得 ≥ 2.5 mg/mL (5.42 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 (5.42 mM); Suspended solution; Need ultrasonic

  此方案可获得 2.5 mg/mL (5.42 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
• 3.

  请依序添加每种溶剂： 10% DMSO    90% corn oil

  Solubility: ≥ 2.5 mg/mL (5.42 mM); Clear solution

  此方案可获得 ≥ 2.5 mg/mL (5.42 mM，饱和度未知) 的澄清溶液，此方案不适用于实验周期在半个月以上的实验。

  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玉米油中，混合均匀。

• [1]. Gilmartin AG, et al. Allosteric Wip1 phosphatase inhibition through flap-subdomain interaction. Nat Chem Biol. 2014 Mar;10(3):181-7.

  [2]. Esfandiari A, et al. Chemical Inhibition of Wild-Type p53-Induced Phosphatase 1 (WIP1/PPM1D) by GSK2830371 Potentiates the Sensitivity to MDM2 Inhibitors in a p53-Dependent Manner. Mol Cancer Ther. 2016 Mar;15(3):379-91.

The primary in vitro Wip1 enzymatic assay measured fluorescence generated by Wip-1 (2-420) hydrolysis of fluorescein diphosphate (FDP). 50 μM FDP substrate is added with GSK 2830371 or DMSO at room temperature before addition of 10 nM Wip1 in assay buffer (50 mM TRIS, pH 7.5, 30 mM MgCl₂, 0.8 mM CHAPS, 0.05 mg/mL BSA). Fluorescent signal is detected on a Spectramax microplate reader (485/530 nm)^[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.

Cells are seeded into 96 well plates at 200-400 cells per well and treated with GSK 2830371 dilution series on day 1. After 7 d, we used the CellTiter-Glo cell viability assay to determine effects on cell growth. Luminescent signal is detected on an EnVision 2104. For clonogenic assays, cells are seeded in 12-well tissue culture plates at 2,000 cells per well. Cells are treated with a compound dilution series on day 1 and again on day 7. After 14 d, cells are washed with 1× PBS, stained with 1 mL of Coomassie Brilliant Blue R-250, and colonies are quantitated with the Optomax Sorcerer colony counter^[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.

Mice^[1]
Female SCID mice are subcutaneously inoculated with 1×10⁷ DOHH2 cells and tumor growth is monitored with electronic calipers. When tumors reached 100-200 mm³, animals are treated orally twice (BID) or thrice (TID) daily with vehicle (2% DMSO and 40% Captisol, pH 4.0) or GSK 2830371. For efficacy studies, eight mice per group are administered with GSK 2830371 at 75 or 150 mg per kg body weight BID or 150 mg per kg body weight TID. Tumor growth inhibition (% difference in tumor growth compared to control) is calculated when tumors for vehicle-control mice exceeded 1,000 mm³ (day 11). For pharmacodynamic biomarker analysis, DOHH2 tumors from three mice are harvested 2 or 4 h after final dose following 14 d of treatment with either vehicle or GSK 2830371 at 75 or 150 mg per kg body weight, BID; tumors are frozen in liquid nitrogen for subsequent lysis and western blot analysis.

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.

• [1]. Gilmartin AG, et al. Allosteric Wip1 phosphatase inhibition through flap-subdomain interaction. Nat Chem Biol. 2014 Mar;10(3):181-7.

  [2]. Esfandiari A, et al. Chemical Inhibition of Wild-Type p53-Induced Phosphatase 1 (WIP1/PPM1D) by GSK2830371 Potentiates the Sensitivity to MDM2 Inhibitors in a p53-Dependent Manner. Mol Cancer Ther. 2016 Mar;15(3):379-91.