MK-8776 (SCH 900776)

製品コードS2735 バッチS273504

印刷

化学情報

Chemical Structure Synonyms N/A Storage
(From the date of receipt)		 3 years -20°C powder
1 years -80°C in solvent
化学式

C15H18BrN7
分子量 376.25 CAS No. 891494-63-6
Solubility (25°C)* 体外 DMSO 75 mg/mL (199.33 mM)
Water Insoluble
Ethanol Insoluble
体内 （毎回新しく調製した物を用意してください）
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.

溶剤液（一定の濃度）を調合する

生物活性

製品説明 MK-8776 (SCH 900776) is a selective Chk1 inhibitor with IC50 of 3 nM in a cell-free assay. It shows 500-fold selectivity against Chk2. Phase 2.
in vitro

MK-8776 (SCH 900776) is a less potent inhibitor of Chk2 and CDK2 with IC50 of 1.5 μM and 0.16 μM, respectively. It shows no significant inhibition of cytochrome P450 human liver microsomal isoforms 1A2, 2C9, 2C19, 2D6, and 3A4. In combination with an antimetabolite, this compound induces accumulation of γ-H2AX within 2 hours, indicative of replication fork collapse and double stranded DNA breaks. Additionally, it suppresses accumulation of the Chk1 pS296 autophosphorylation in a dose-dependent manner. Exposure of proliferating WS1 cells to SCH 900776 is associated with rapid, dose-dependent accumulation of Chk1 pS345, indicating that cycling populations of normal cells induce Chk1 pS345 following exposure to it as part of a futile cycle, perhaps driven by AT-family kinases and DNA-PK.[1]
in vivo

Dose escalation of MK-8776 (SCH 900776) (16 mg/kg and 32 mg/kg) induces incremental improvements in tumor response. Importantly, doses of this compound associate with robust biomarker activation and improved tumor response are not associated with enhanced toxicity on hematological parameters in BALB/c mice. [1]

プロトコル(参考用のみ)

キナーゼアッセイ Chk1 SPA assay
An in vitro assay utilizing recombinant His-Chk1 expressed in the baculovirus expression system as an enzyme source and biotinylated peptide based upon CDC25C as substrate. His-Chk1 is diluted to 32 nM in kinase buffer containing 50 mM Tris pH 8.0, 10 mM MgCl2, and 1 mM DTT. CDC25C (CDC25 Ser216 C-term biotinylated peptide) peptide is diluted to 1.93 μM in kinase buffer. For each kinase reaction, 20 μL of 32 nM Chk1 enzyme solution and 20 μL of 1.926 μM CDC25C are mixed and combined with 10 μL of MK-8776 (SCH 900776) diluted in 10% DMSO, making final reaction concentrations of 6.2 nM Chk1, 385 nM CDC25C and 1% DMSO after addition of start solution. The reaction is started by addition of 50 μL of start solution consisting of 2 μM ATP and 0.2 μCi of 33P-ATP, making a final reaction concentration of 1 μM ATP, with 0.2 μCi of 33P-ATP per reaction. Kinase reactions run for 2 hours at room temperature and are stopped by the addition of 100 μL of stop solution consisting of 2 M NaCl, 1% H3PO4, and 5 mg/mL Streptavidin-coated SPA beads. SPA beads are captured using a 96-well GF/B filter plate and a Filtermate universal harvester. Beads are washed twice with 2 M NaCl and twice with 2 M NaCl with 1% phosphoric acid. Signal is then assayed using a TopCount 96-well liquid scintillation counter. Dose-response curves are generated from duplicate 8 point serial dilutions of this compound. IC50 values are derived by nonlinear regression analysis.
細胞アッセイ 細胞株 mESCs
濃度 10 μM
反応時間 1 h
実験の流れ Cells were treated with MK-8776 (SCH 900776), other inhibitors, or vehicle for 1 hour.
動物実験 動物モデル Female nude mice injected subcutaneously with A2780 or MiaPaCa2 cells
投薬量 ~50 mg/kg
投与方法 Administered intraperitoneally

参考

  • https://pubmed.ncbi.nlm.nih.gov/21321066/
  • https://pubmed.ncbi.nlm.nih.gov/22203733/
  • https://pubmed.ncbi.nlm.nih.gov/22869869/
  • https://pubmed.ncbi.nlm.nih.gov/34267371/

カスタマーフィードバック

,

Data from [Data independently produced by , , Biomaterials, 2018, 182:35-43]

Data from [Data independently produced by , , Cell Death Dis, 2015, 6:e1947.]

Selleckの高級品が、幾つかの出版された研究調査結果（以下を含む）で使われた：

The DNA replication checkpoint prevents PCNA/RFC depletion to protect forks from HLTF-induced collapse in human cells [ Mol Cell, 2025, 85(13):2474-2486.e6] PubMed: 40578346
Combined MEK and PARP inhibition enhances radiation response in rectal cancer [ Cell Rep Med, 2025, 6(8):102284] PubMed: 40782795
Combined therapy with DR5-targeting antibody-drug conjugate and CDK inhibitors as a strategy for advanced colorectal cancer [ Cell Rep Med, 2025, S2666-3791(25)00231-9] PubMed: 40449480
WIP1 mutations suppress DNA damage triggered bypass of the mitotic timer [ EMBO J, 2025, 10.1038/s44318-025-00495-0] PubMed: 40551011
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
Nuclear PD-L1 triggers tumour-associated inflammation upon DNA damage [ EMBO Rep, 2025, 10.1038/s44319-024-00354-9] PubMed: 39747659
MK-8776 and Olaparib Combination Acts Synergistically in Hepatocellular Carcinoma Cells, Demonstrating Lack of Adverse Effects on Liver Tissues in Ovarian Cancer PDX Model [ Int J Mol Sci, 2025, 26(2)834] PubMed: 39859548
Synthetic Lethal Combinations of DNA Repair Inhibitors and Genotoxic Agents to Target High-Risk Diffuse Large B Cell Lymphoma [ Hematol Oncol, 2025, 43(5):e70131] PubMed: 40847617
Oncogenic p53 induces mitotic errors in lung cancer cells by recopying DNA replication forks conferring targetable proliferation advantage [ Res Sq, 2025, rs.3.rs-7303237] PubMed: 40831504
Precise nano-system-based drug delivery and synergistic therapy against androgen receptor-positive triple-negative breast cancer [ Acta Pharm Sin B, 2024, 14(6):2685-2697] PubMed: 38828153

長期の保管のために-20°Cの下で製品を保ってください。

人間や獣医の診断であるか治療的な使用のためにでない。

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