Adavosertib (MK-1775)

Catalog No.S1525 Batch:S152507

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Technical Data

Formula

C27H32N8O2
Molecular Weight 500.6 CAS No. 955365-80-7
Solubility (25°C)* In vitro DMSO 100 mg/mL (199.76 mM)
Ethanol 10 mg/mL (19.97 mM)
Water Insoluble
In vivo (Add solvents to the product individually and in order)
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.
* <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.)

Preparing Stock Solutions

Biological Activity

Description Adavosertib (MK-1775, AZD1775) is a potent and selective Wee1 inhibitor with IC50 of 5.2 nM in a cell-free assay; hinders G2 DNA damage checkpoint. Phase 2.
Targets
Wee1 [1]
(Cell-free assay)
5.2 nM
In vitro

MK-1775 inhibits Wee1 kinase in an ATP-competitive manner. Compared to Wee1, MK-1775 displays 2- to 3-fold less potency against Yes with IC50 of 14 nM, 10-fold less potency against seven other kinases with >80% inhibition at 1 μM, and >100-fold selectivity over human Myt 1, another kinase that inhibits cyclin-dependent kinase 1 (CDC2) by phosphorylation at an alternative site (Thr14). By abrogating the DNA damage checkpoint via blockade of Wee1 activity in WiDr cells bearing mutated p53, MK-1775 treatment inhibits the basal phosphorylation of CDC2 at Tyr15 (CDC2Y15) with EC50 of 49 nM, and suppresses induced phosphorylation of CDC2 and cell cycle arrest in a dose-dependent manner, with EC50 of 82 nM and 81 nM, 180 nM and 163 nM, as well as 159 nM and 160 nM, respectively. MK-1775 treatment alone at 30-100 nM has no significant antiproliferative effect in WiDr and H1299 cells, whereas MK-1775 at 300 nM, sufficient to inhibit Wee1 by >80%, displays moderate but significant antiproliferative effects by 34.1% in WiDr cells and 28.4% in H1299 cells. [1]
In vivo

MK-1775 treatment alone at ~20 mg/kg displays minimal antitumor effects against WiDr xenografts in rats with T/C of 69% at day 3. Antitumor efficacy by MK-1775 alone in the nude rat HeLa-luc and TOV21G-shp53 xenograft models is also moderate. [1]
Features The first reported Wee1 inhibitor.

Protocol (from reference)

Kinase Assay:

[1]
  • In vitro kinase assays

    Recombinant human Wee1 is used. Kinase reaction is conducted with 10 μM ATP, 1.0 μCi of [γ-33P]ATP, and 2.5 μg of poly(Lys, Tyr) as a substrate in the presence of increasing concentrations of MK-1775 at 30°C for 30 minutes. Radioactivity incorporated into the substrate is trapped on MultiScreen-PH plates and is counted on a liquid scintillation counter.
Cell Assay:

[1]
  • Cell lines

    WiDr, NCI-H1299, TOV21G, and HeLa

  • Concentrations

    Dissolved in DMSO, final concentrations ~10 μM

  • Incubation Time

    24 hours

  • Method

    Cells are treated for 24 hours, then with MK-1775 for an additional 24 hours. Cell viability is determined with a WST-8 kit using SpectraMax. Cellular caspase-3/7 activities are determined with a Caspase-3/7 Glo kit.
Animal Study:

[1]
  • Animal Models

    Immunodeficient nude rats (F344/NJcl-rnu) bearing WiDr, HeLa-luc, or TOV21G-shp53 tumors

  • Dosages

    ~20 mg/kg/day

  • Administration

    Orally

References

  • https://pubmed.ncbi.nlm.nih.gov/19887545/

Customer Product Validation

Diagnostic AML blasts from patients either at first diagnosis or at relapse are equally sensitive to MK-1775. Freshly isolated cells from patient AML#10 were purified by standard Ficoll-Hypaque density centrifugation. AML#10, HL-60, and HL-60/Ara-C cells were treated with MK-1775 for 48 h. Whole cell lysates were subjected to Western blotting and probed with anti-p-CDK1, -CDK1, -p-CDK2, -CDK2, -γH2AX, or -β-actin antibody.

Data from [ J Hematol Oncol , 2014 , 7:53 ]

AZD1480 inhibits the JAK2/STAT3 pathway in vitro. HT29 cells were cultured in 24-well plates overnight and then treated with 1 uM AZD1480 for 2 h followed by 4 ng/ml, IL-6 for 2 h and the distribution of phosphorylated STAT3 was analyzed by immunofluorescence.

Data from [ Oncol Rep , 2014 , 32(5), 1991-8 ]

GH activates STAT5 and ERK in breast cancer cells. T47D cells were pretreated for 2 hours with vehicle (dimethylsulfoxide) or inhibitors for EGFR (AG1478, 15 uM) or JAK2 (AZD1480, 1 uM), followed by treatment with GH+E2 for 30 minutes.

Data from [ Endocrinology , 2013 , 154(9), 3219-27 ]

Histopathological assessment of tumor response to MK-1775 alone and in combination with gemcitabine in a patient-derived osteosarcoma mouse model. A. H&E-stained paraffin sections were prepared to assess microscopic features of cell death and differentiation representative micrographs of B. Ki67 shows high immunoreactivity in the control, MK-1775, and combination treatments compared to gemcitabine treatment. C. Cleaved-caspase 3 images show high immunoreactivity in the MK-1775 and combination treatments compared to vehicle and gemcitabine treatment. D. Slides stained for γH2AX show high immunoreactivity in gemcitabine, MK-1775, and combination treatments compared to controls. E. Slides stained for Cyclin A show higher immunoreactivity in gemcitabine but not in control, MK-1775 alone or in combination treatments.

Data from [ PLoS One , 2013 , 8(3), e57523 ]

Selleck's Adavosertib (MK-1775) Has Been Cited by 272 Publications

KEAP1 and STK11/LKB1 alterations enhance vulnerability to ATR inhibition in KRAS mutant non-small cell lung cancer [ Cancer Cell, 2025, 43(8):1530-1548.e9] PubMed: 40645185
Whole-exome tumor-agnostic ctDNA analysis enhances minimal residual disease detection and reveals relapse mechanisms in localized colon cancer [ Nat Cancer, 2025, 10.1038/s43018-025-00960-z] PubMed: 40301653
A patient-derived T cell lymphoma biorepository uncovers pathogenetic mechanisms and host-related therapeutic vulnerabilities [ Cell Rep Med, 2025, S2666-3791(25)00102-8] PubMed: 40147445
SETD2 loss-of-function uniquely sensitizes cells to epigenetic targeting of NSD1-directed H3K36 methylation [ Genome Biol, 2025, 26(1):22] PubMed: 39910618
Cytoplasmic WEE1 promotes resistance to PD-1 blockade through hyperactivation of the HSP90A/TCL1/AKT signaling axis in NANOGhigh tumors [ Cancer Immunol Res, 2025, 10.1158/2326-6066.CIR-24-0379] PubMed: 40067354
Geometric deep learning and multiple-instance learning for 3D cell-shape profiling [ Cell Syst, 2025, 16(3):101229] PubMed: 40112779
WEE1 inhibitor exerts synergistic effect with KRAS G12C inhibitor via MYBL2-RRM2 axis in KRASG12C-mutant lung cancer [ Cell Death Dis, 2025, 16(1):661] PubMed: 40885709
Versatile enhancement of the killing potential of anti-cancer agents achieved by peptide mimetics of the PCNA interface towards specialized DNA polymerases [ Cell Death Dis, 2025, 16(1):503] PubMed: 40628724
Targeting Chk1 and Wee1 kinases enhances radiosensitivity of 2D and 3D head and neck cancer models to X-rays and low/high-LET protons [ Cell Death Dis, 2025, 16(1):128] PubMed: 39994186
Cyclin E1 overexpression sensitizes ovarian cancer cells to WEE1 and PLK1 inhibition [ Oncogene, 2025, 10.1038/s41388-025-03312-4] PubMed: 39994376

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