Mirdametinib (PD0325901)

Catalog No.S1036 Batch:S103609

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Technical Data

Formula

C16H14F3IN2O4
Molecular Weight 482.19 CAS No. 391210-10-9
Solubility (25°C)* In vitro DMSO 96 mg/mL (199.09 mM)
Ethanol 96 mg/mL (199.09 mM)
Water Insoluble
* <1 mg/ml means slightly soluble or insoluble.
* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.
* Room temperature shipping (Stability testing shows this product can be shipped without any cooling measures.)

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Biological Activity

Description Mirdametinib (PD0325901) is a selective and non ATP-competitive MEK inhibitor with IC50 of 0.33 nM in cell-free assays, roughly 500-fold more potent than CI-1040 on phosphorylation of ERK1 and ERK2. Phase 2.
Targets
MEK [1]
(Cell-free assay)
0.33 nM
In vitro PD0325901 shows higher permeability than CI-1040, another MEK inhibitor. PD0325901 should be able to achieve higher systemic exposures than CI-1040. [1] PD0325901 is exquisitely specific and highly potent against purified MEK, revealing a Kiapp of 1 nM against activated MEK1 and MEK2. [2] PD0325901 is roughly 500-fold more potent than CI-1040 with respect to its cellular effects on phosphorylation of ERK1 and ERK2, displaying subnanomolar activity. [2] PD0325901 prevents the growth of melanoma cell lines. PD0325901 inhibits the growth of TPC-1 cells and K2 cells with GI50 of 11 nM and 6.3 nM, respectively. [3] PD0325901 significantly prevents the the growth of PTC cells harboring a BRAF mutation at very low concentration (10 nM) and only moderately increases the growth of the PTC cells carrying the RET/PTC1 rearrangement at the same concentration. PD0325901 effectively inhibits the phosphorylation of ERK1/2 in multiple PTC cell lines. [3]
In vivo The improved potency of PD0325901 relative to CI-1040 is evident. A single oral dose of PD0325901 (25 mg/kg) inhibits phosphorylation of ERK by more than 50% at 24 hours post-dosing. In contrast, CI-1040 at a much higher dose (150 mg/kg) only inhibit pERK levels for roughly 8 hours, returning to control levels by 24 hours after treatment. [2] Therefore, the dose required to produce a 70% incidence of complete tumor responses (C26 model) is 25 mg/kg/day versus 900 mg/kg/day for PD0325901 and CI-1040, respectively. Anticancer activity of PD 0325901 has been demonstrated for a broad spectrum of human tumor xenografts. [2] After 1 week of oral administration of PD0325901 (20–25 mg/kg/day) in mice, no tumor growth is detected in mice inoculated with PTC cells bearing a BRAF mutation. [3] For PTC with the RET/PTC1 rearrangement, the average tumor volume of the orthotopic tumor is decreased by 58% as compared with controls. In conclusion, PTC cells carrying a BRAF mutation are more sensitive to PD0325901 than are PTC cells carrying the RET/PTC1 rearrangement. [3]

Protocol (from reference)

Kinase Assay:

[1]
  • In vitro cascade assay

    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.
Cell Assay:

[3]
  • Cell lines

    PTC cells

  • Concentrations

    0.1 nM- 1 μM

  • Incubation Time

    48 hours

  • Method

    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 GI50 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 GI50, 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.
Animal Study:

[3]
  • Animal Models

    Ncr-nu/nu mice bearing PTC cells

  • Dosages

    20-25 mg/kg

  • Administration

    Oral gavage

Customer Product Validation

Data from [Data independently produced by Nature, 2015, 517(7534), 391-5]

Data from [Data independently produced by Oncogene, 2015, 10.1038/onc.2015.97]

Data from [Data independently produced by J Bone Joint Surg Am, 2015, 96(14), e117]

Data from [Data independently produced by J Exp Med, 2014, 211(3), 395-404]

Selleck's Mirdametinib (PD0325901) has been cited by 990 publications

Structure-guided discovery of highly efficient cytidine deaminases with sequence-context independence [ Nat Biomed Eng, 2025, 9(1):93-108] PubMed: 38831042
Highly efficient construction of monkey blastoid capsules from aged somatic cells [ Nat Commun, 2025, 16(1):1130] PubMed: 39875393
Medium from human iPSC-derived primitive macrophages promotes adult cardiomyocyte proliferation and cardiac regeneration [ Nat Commun, 2025, 16(1):3012] PubMed: 40148355
WNK1-dependent water influx is required for CD4+ T cell activation and T cell-dependent antibody responses [ Nat Commun, 2025, 16(1):1857] PubMed: 39984435
ZNF143 is a transcriptional regulator of nuclear-encoded mitochondrial genes that acts independently of looping and CTCF [ Mol Cell, 2025, 85(1):24-41.e11] PubMed: 39708805
Dual-nuclease single-cell lineage tracing by Cas9 and Cas12a [ Cell Rep, 2025, 44(1):115105] PubMed: 39721023
NLRP7 maintains the genomic stability during early human embryogenesis via mediating alternative splicing [ Commun Biol, 2025, 8(1):125] PubMed: 39865169
The network response to Egf is tissue-specific [ iScience, 2025, 28(4):112146] PubMed: 40171493
Basroparib overcomes acquired resistance to MEK inhibitors by inhibiting Wnt-mediated cancer stemness in KRAS-mutated colorectal cancer [ Biochem Pharmacol, 2025, 235:116842] PubMed: 40024348
A developmental atlas of mouse vestibular-like inner ear organoids [ iScience, 2025, 28(2):111817] PubMed: 39967872

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SHIPPING AND STORAGE
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