KRN 633

Catalog No.S1557 Batch:S155701

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Technical Data

Formula

C20H21ClN4O4
Molecular Weight 416.86 CAS No. 286370-15-8
Solubility (25°C)* In vitro DMSO 9 mg/mL (21.58 mM)
Water Insoluble
Ethanol 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.)

Preparing Stock Solutions

Biological Activity

Description KRN 633 is an ATP-competitive inhibitor of VEGFR1/2/3 with IC50 of 170 nM/160 nM/125 nM, weakly inhibits PDGFR-α/β and c-Kit, does not block the phosphorylation of FGFR-1, EGFR or c-Met in cell.
Targets
VEGFR3 [1] VEGFR2 [1] VEGFR1 [1] PDGFRα [1] c-Kit [1] View More
125 nM 160 nM 170 nM 965 nM 4330 nM
In vitro KRN 633, a novel quinazoline urea derivative, strongly inhibits VEGFR1, VEGFR2 and VEGFR3 receptors with IC50 values of 170 nM, 160 nM and 125 nM respectively. It shows lower inhibitory activity towards non-RTKs, such as PDGF receptor (PDGFRα and β, c-Kit, breast tumor kinase, and tunica interna endothelial cell kinase tyrosine kinases (IC50 = 965, 9850, 4330, 9200, and 9900 nM, respectively). KRN 633 potently inhibits ligand VEGF induced phosphorylation of VEGFR2 in HUVECs with an IC50 of 1.16 nM. KRN 633 also inhibits VEGF-dependent, but not bFGF-dependent, phosphorylation of the MAP kinases in endothelial cells, with IC50 values of 3.51 nM and 6.08 nM for ERK1 and ERK2, respectively. KRN633 has also been shown to inhibit the VEGF-driven proliferation of HUVECs with an IC50 of 14.9 nM, but it only suppresses FGF-driven proliferation at 3 μM weakly. [1] KRN 633 inhibits hypoxia-induced transcriptional activation of HIF-1α in a concentration-dependent manner with an IC50 of 3.79 μM, through the inhibition of both Akt and ERK phosphorylation signaling pathways. [2]
In vivo Although not cytotoxic to various cancer cells in vitro, KRN633 exhibits excellent antitumor activity in vivo due to its inhibitory effect on tumor vessel formation and vascular permeability. Once-daily administration of KRN633 at 100 mg/kg/d produces significant tumor growth inhibition in A549, LC-6-LCK, HT29, Ls174T, LNCap and Du145 cells while twice-daily administration of KRN633 at 100 mg/kg induces ~90% growth inhibition of HT29 tumors. [1] Treatment of mid-pregnancy mice with KRN 633 (300 mg/kg, p.o.) reduces the blood supply to fetal tissues due to diminished vascularization in both placenta and fetal organs and consequently increases the risk of induction of intrauterine growth restriction (IUGR). [3]

Protocol (from reference)

Kinase Assay:[1]
  • Cell-Free Kinase Assays

    Cell-free kinase assays are done to obtain IC50 values against a variety of recombinant VEGF receptors. KRN633 is tested at concentrations varying from 0.3 nM to 10 μM. All assays are done in quadruplicate with 1 μM ATP.
Cell Assay:[1]
  • Cell lines

    A549, Ls174T, DU145, HT29, LNCap and PC-3 cell lines

  • Concentrations

    Dissolved in DMSO, final concentrations 0.01 to 10 μM

  • Incubation Time

    96 hours

  • Method

    Cancer cells are plated in media containig 10% FBS and antibiotics, at densities known to permit exponential growth over the assay period. The cells are cultured for 24 hours before adding KRN633 (0.01 to 10 μM) or just the vehicle (0.1% DMSO in medium) and then grown for a further 96 hours. Cell viability is measured using WST-1 reagent.
Animal Study:[1]
  • Animal Models

    A549, Ls174T, HT29, DU145, LNCap, PC-3 cells and LC-6-JCK are established in athymic mice (BALB/cA, Jcl-nu) and athymic rats (F344/N, Jcl-rnu), respectively.

  • Dosages

    20-100 mg/kg

  • Administration

    Gavage once daily

Customer Product Validation

Data from [Data independently produced by , , Mol Cells, 2013, 36:347-354.]

Selleck's KRN 633 has been cited by 6 publications

The in vitro effect of VEGF receptor inhibition on primary alveolar osteoblast nodule formation. [ Aust Dent J, 2020, 10.1111/adj.12752] PubMed: 32072641
Regorafenib induces adaptive resistance of colorectal cancer cells via inhibition of vascular endothelial growth factor receptor. [ J Med Invest, 2017, 64(3.4):262-265] PubMed: 28954993
Synergistic effect of therapeutic stem cells expressing cytosine deaminase and interferon-beta via apoptotic pathway in the metastatic mouse model of breast cancer. [ Oncotarget, 2016, 7(5):5985-99] PubMed: 26716512
Deconstructing the Iboga Alkaloid Skeleton: Potentiation of FGF2-induced Glial Cell Line-Derived Neurotrophic Factor Release by a Novel Compound [ ACS Chem Biol, 2016, 11(1):77-87] PubMed: 26517751
Co-treatment with therapeutic neural stem cells expressing carboxyl esterase and CPT-11 inhibit growth of primary and metastatic lung cancers in mice. [ Oncotarget, 2014, 5(24):12835-48] PubMed: 25544747
Anticancer effects of the engineered stem cells transduced with therapeutic genes via a selectivetumor tropism caused by vascular endothelial growth factor toward HeLa cervical cancer cells. [Kim HS, et al. Mol Cells, 2013, 36(4):347-54] PubMed: 24008363

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SHIPPING AND STORAGE
Selleck products are transported at room temperature. If you receive the product at room temperature, please rest assured, the Selleck Quality Inspection Department has conducted experiments to verify that the normal temperature placement of one month will not affect the biological activity of powder products. After collecting, please store the product according to the requirements described in the datasheet. Most Selleck products are stable under the recommended conditions.

NOT FOR HUMAN, VETERINARY DIAGNOSTIC OR THERAPEUTIC USE.