Mirdametinib (PD0325901) is an orally active, selective and non-ATP-competitive MEK inhibitor with an IC₅₀ of 0.33 nM. Mirdametinib exhibits a K_i^app of 1 nM against activated MEK1 and MEK2. Mirdametinib suppresses the expression of p-ERK1/2 and induces apoptosis. Mirdametinib has anti-cancer activity for a broad spectrum of human tumor xenografts^[1][2][3].

Mirdametinib (PD325901; 0.0064, 0.032, 0.16, 0.8, 4, 20, 100 nM; for 2 days) inhibits the growth of Papillary thyroid carcinomas (PTC) cell lines (TPC-1 cells and K2 cells) with GC₅₀ of 11 nM and 6.3 nM, respectively^[3].
Mirdametinib (100 nmol/L; for 4 days) induces apoptosis in K2 cells (top) or TPC-1 cells^[3].
Mirdametinib (0.1, 1, 10, 100, 1000 nM; for 1 hour) suppresses the expression of p-ERK1/2 in K2 cells (top) or TPC-1 cells^[3].
Mirdametinib prevents the growth of melanoma cell lines. Mirdametinib significantly prevents the the growth of PTC cells harboring a BRAF mutation at very low concentration (10 nM)^[3].

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.

Mirdametinib (25 mg/kg, p.o.) inhibits phosphorylation of ERK by more than 50% at 24 hours post-dosing. Mirdametinib (25 mg/kg/day; po) produces a 70% incidence of complete tumor responses (C26 model)^[2].
Mirdametinib (20-25 mg/kg/day; oral gavage; for 3 weeks (5 consecutive days/week)) suppresses tumor growth completely in mice inoculated with PTC cells carrying a BRAF mutation (K2) and significantly decreased tumor growth in mice inoculated with PTC cells carrying the RET/PTC1 rearrangement (TPC-1) in athymic Ncr-nu/nu mice at ages 6 to 8 weeks^[3].

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.

482.19

C₁₆H₁₄F₃IN₂O₄

391210-10-9

Room temperature in continental US; may vary elsewhere.

DMSO : ≥ 56 mg/mL (116.14 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。

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: ≥ 2.08 mg/mL (4.31 mM); Clear solution

  此方案可获得 ≥ 2.08 mg/mL (4.31 mM，饱和度未知) 的澄清溶液。

  以 1 mL 工作液为例，取 100 μL 20.8 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: ≥ 2.08 mg/mL (4.31 mM); Clear solution

  此方案可获得 ≥ 2.08 mg/mL (4.31 mM，饱和度未知) 的澄清溶液。

  以 1 mL 工作液为例，取 100 μL 20.8 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: ≥ 2.08 mg/mL (4.31 mM); Clear solution

  此方案可获得 ≥ 2.08 mg/mL (4.31 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 20.8 mg/mL 的澄清 DMSO 储备液加到 900 μL玉米油中，混合均匀。

• [1]. Barrett SD, et al. The discovery of the benzhydroxamate MEK inhibitors CI-1040 and PD 0325901. Bioorg Med Chem Lett. 2008 Dec 15;18(24):6501-4.

  [2]. Judith S. Sebolt-Leopold, et al. The biological profile of PD 0325901: A second generation analog of CI-1040 with improved pharmaceutical potential

  [3]. Henderson YC, et al. MEK inhibitor PD0325901 significantly reduces the growth of papillary thyroid carcinoma cells in vitro and in vivo. Mol Cancer Ther. 2010 Jul;9(7):1968-76.

Incorporation of ³²P into myelin basic protein (MBP) is assayed in the presence of a glutathione S-transferase fusion protein containing p44MAP kinase (GST-MAPK) and a glutathione S-transferase protein containing p45MEK (GST-MEK). The assay solution contained 20 mM HEPES, pH 7.4, 10 mM MgCl₂, 1 mM MnCl₂, 1 mM EGTA, 50 mM [gamma-³²P]ATP, 10 mg GST-MEK, 0.5 mg GST-MAPK and 40 mg MBP in a final volume of 100 mL. Reactions are stopped after 20 minutes by addition of trichloroacetic acid and filtered through a GF/C filter mat. ³²P retained on the filter mat is determined using a 1205 Betaplate. PD0325901 is assessed at various dose ranges in order to determine dose response curves.

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.

PTC cells (1×10⁴) are seeded in 24-well plates with 1 mL of medium for 4 days in a 37°C incubator. MEK inhibitor PD0325901 at varying concentrations is added to the cells in triplicate on day 0. MTT dissolved in 0.8% NaCl solution at 5 mg/mL is added to each well (0.2 mL) on day 2 to test GC₅₀ or every day for cell growth curves. The cells are incubated at 37°C for 3 hours with MTT. The liquid is then aspirated from the wells and discarded. Stained cells are dissolved in 0.5 mL of DMSO and their absorption at 570 nm is measured using a Synergy HT multidetection microplate reader. For GC₅₀, cell growth is calculated as 100×(T−T₀)/(C−T₀), where T is the optical density of the wells treated with inhibitors after a 48-hour period, T₀ is the optical density at time zero, and C is the control optical density with DMSO only.

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 (10-14 per group) are anesthetized s.c. with a cocktail. K2 and TPC-1 cells stably infected with a retrovirus expressing luciferase (5×10⁵ cells in 5 μL RPMI1640 medium) are inoculated into the thyroid gland, and the mice are monitored weekly for tumor growth by Xenogen using Living Image 3.0 software. One week after inoculation, PD0325901 is dissolved in 80 mM citric buffer (pH 7) by sonication and given to mice daily by oral gavage (20-25 mg/kg) for 3 weeks (5 consecutive days/week). Mice are sacrificed only due to tumor burden or loss of 20% of body weight. Tumor sizes are measured with calipers and tumor volume (V) is calculated by the formula (V=length×width×depth). Control mice are given 80 mM citric buffer (pH 7) alone. All in vivo experiments are done at least twice.

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]. Barrett SD, et al. The discovery of the benzhydroxamate MEK inhibitors CI-1040 and PD 0325901. Bioorg Med Chem Lett. 2008 Dec 15;18(24):6501-4.

  [2]. Judith S. Sebolt-Leopold, et al. The biological profile of PD 0325901: A second generation analog of CI-1040 with improved pharmaceutical potential

  [3]. Henderson YC, et al. MEK inhibitor PD0325901 significantly reduces the growth of papillary thyroid carcinoma cells in vitro and in vivo. Mol Cancer Ther. 2010 Jul;9(7):1968-76.