Molecular Weight(MW): 500.6
MK-1775 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.
Cited by 9 Publications
5 Customer Reviews
Panobinostat enhances the antitumor activity of MK-1775 in a BxPC-3 xenograft model. Tumor specimens were fixed in 10% formalin, embedded in paraffin, and cut into 4 μM-thick slides for H&E staining.
Cancer Letters, 2015, 356(200): 656–668 . MK-1775 purchased from Selleck.
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.
J Hematol Oncol 2014 7:53. MK-1775 purchased from Selleck.
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.
Endocrinology 2013 154(9), 3219-27. MK-1775 purchased from Selleck.
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.
PLoS One 2013 8(3), e57523. MK-1775 purchased from Selleck.
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.
Oncol Rep 2014 32(5), 1991-8. MK-1775 purchased from Selleck.
Purity & Quality Control
Choose Selective Wee1 Inhibitors
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2. For more details, such as half maximal inhibitory concentrations (IC50s) and working concentrations of each inhibitor, please click on the link of the inhibitor of interest.
3. "+" indicates inhibitory effect. Increased inhibition is marked by a higher "+" designation.
4. Orange "√" refers to compounds which do inhibitory effects on the related isoform, but without specific value.
|Description||MK-1775 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.|
|Features||The first reported Wee1 inhibitor.|
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 gemcitabine-, carboplatin- or cisplatin-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. 
|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. |
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.
|In vitro||DMSO||80 mg/mL (159.8 mM)|
|Water||0.0001 mg/mL (0.0 mM)|
|In vivo||2% DMSO+30% PEG 300+5% Tween+ddH2O||5mg/mL|
* 1 mg/ml means slightly soluble or insoluble.
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Clinical Trial Information
|NCT Number||Recruitment||Conditions||Sponsor/Collaborators||Start Date||Phases|
|NCT02037230||Recruiting||Adenocarcinoma of the Pancreas||University of Michigan Cancer Center||January 2014||Phase 1|Phase 2|
|NCT01357161||Completed||Ovarian Cancer||Merck Sharp & Dohme Corp.||July 2011||Phase 2|
|NCT01164995||Unknown status||Epithelial Ovarian Cancer||The Netherlands Cancer Institute|Merck Sharp & Dohme Corp.||July 2010||Phase 2|
|NCT01076400||Terminated||Cervical Cancer||Merck Sharp & Dohme Corp.||May 2010||Phase 1|Phase 2|
|NCT01047007||Terminated||Solid Tumors||Merck Sharp & Dohme Corp.||January 2010||Phase 1|
|NCT00648648||Completed||Solid Tumors||Merck Sharp & Dohme Corp.||February 2008||Phase 1|
Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.
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