RKI-1447

Catalog No.S7195 Batch:S719501

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Technical Data

Formula

C16H14N4O2S
Molecular Weight 326.37 CAS No. 1342278-01-6
Solubility (25°C)* In vitro DMSO 65 mg/mL (199.16 mM)
Water Insoluble
Ethanol Insoluble
In vivo (Add solvents to the product individually and in order)
Homogeneous suspension
15% Captisol
10.0mg/ml Taking the 1 mL working solution as an example, take 10 mg of this product, add it to 1 ml of 15% Captisol clear solution, and mix evenly to form a uniform suspension. The mixed solution should be used immediately for optimal results. 
Clear solution
5%DMSO 40%PEG300 5%Tween80 50%ddH2O
10.0mg/ml Taking the 1 mL working solution as an example, add 50 μL of 200 mg/ml clarified DMSO stock solution to 400 μL of PEG300, mix evenly to clarify it; add 50 μL of Tween80 to the above system, mix evenly to clarify; then continue to add 500 μL of ddH2O to adjust the volume to 1 mL. The mixed solution should be used immediately for optimal results. 
Clear solution
5% DMSO 95% Corn oil
0.25mg/ml Taking the 1 mL working solution as an example, add 50 μL of 5 mg/ml clear DMSO stock solution to 950 μL of corn oil and mix evenly. The mixed solution should be used immediately for optimal results. 
* <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 RKI-1447 is a potent inhibitor of ROCK1 and ROCK2, with IC50 of 14.5 nM and 6.2 nM, respectively, has anti-invasive and antitumor activities.
Targets
ROCK2 [1]
(Cell-free assay)		 ROCK1 [1]
(Cell-free assay)
6.2 nM 14.5 nM
In vitro RKI-1447 is a cell-permeable pyridylthiazolyl-urea that acts as a potent, ATP site-targeting Rho Kinase inhibitor, displaying much reduced potency against PKA, PKN1/PRK1, p70S6K/RPS6kB1, AKT1, MRCKa/CDC42BPA (85.5%, 80.5%, 61.9%, 56.0%, and 50.4% inhibition, respectively, by 1 µM RKI-1447) or 15 other kinases. Crystal structures of the RKI-1447/ROCK1 complex reveals that RKI-1447 is a Type I kinase inhibitor that binds the ATP binding site through interactions with the hinge region and the DFG motif. RKI-1447 suppresses phosphorylation of the ROCK substrates MLC-2 and MYPT-1 in human cancer cells, but had no effect on the phosphorylation levels of the AKT, MEK, and S6 kinase at concentrations as high as 10 μM. RKI-1447 is also highly selective at inhibiting ROCK-mediated cytoskeleton re-organization (actin stress fiber formation) following LPA stimulation, but does not affect PAK-meditated lamellipodia and filopodia formation following PDGF and Bradykinin stimulation. RKI-1447 inhibits migration, invasion and anchorage-independent tumor growth of breast cancer cells. [1]
In vivo RKI-1447 is highly effective at inhibiting the outgrowth of mammary tumors in a transgenic mouse model. Tumors from mice treated with the RKI-1447 increases in size with an average percent change in tumor volume of only 8.8%. Thus, RKI-1447 inhibited mammary tumor growth by 87%, and on average the mammary tumors from Compared with those tumors from mice treated with the vehicle control, RKI-1447 treated mice are 7.7-fold smaller. RKI-1447 treatments does not result in mouse weight loss. [1]

Protocol (from reference)

Kinase Assay:[2]
  • Z-Lyte FRET kinase assay

    Kinase inhibition is measured using the Invitrogen Z-Lyte® FRET kinase assay with Ser/Thr 13 peptide substrate based on the myosin light chain sequence KKRPQRRYSNVF. Compounds are tested on three separate days with 8 point dilutions performed in duplicate to determine average IC50 values. The assay conditions are optimized to 15 μL of kinase reaction volume with 5 ng of enzyme in 50 mM HEPES (pH 7.5), 10 mM MgCl2, 1 mM EGTA, and 0.01% Brij-35. The reaction is incubated for 1 h at room temperature in the presence of 1.5 μM of peptide substrate with 12.5 μM of ATP (for ROCK1) or 2 μM of substrate with 50 μM of ATP (for ROCK2). The reaction is then stopped and the ratio of phosphorylated to unphosphorylated peptides is determined by selective cleavage of only the unphosphorylated peptide as described by the manufacturer. This is followed by excitation of coumarin at 400 nm resulting in emission at 445 nm and energy transfer to fluorescein and final emission at 520 nm. The substrate contains both coumarin and fluorescein and only uncleaved phosphorylated substrate will undergo FRET. The ratio of the signals at 445 nm and 520 nm is measured using a Wallac EnVision Plate Reader, model 2102 plate-reader.

Cell Assay: [1]
  • Cell lines

    MDA-MB-231

  • Concentrations

    ~600 μM

  • Incubation Time

    72 h

  • Method

    Cells are plated in a 96 well tissue culture plate (1200 cells per well) and incubated for 24 hours. After incubation the cells are treated with vehicle or increasing concentrations of RKI-1447 for 72 hours. After incubation, freshly prepared MTT (2mg/ml) is added to each well and incubated for 3 hours. After incubation the plates are read at 540 nm.

Animal Study: [1]
  • Animal Models

    MMTV/neu transgenic mice [FVB/N-Tg (MMTVneu) 202 Mul/J]

  • Dosages

    200 mpk/day

  • Administration

    i.p.

Customer Product Validation

Data from [Data independently produced by , , Oncogene, 2016, 1-10.]

Data from [Data independently produced by , , Neoplasia, 2018, 20(1):44-56]

Data from [Data independently produced by , , Anticancer Res, 2017, 37(4):1805-1818]

Selleck's RKI-1447 has been cited by 10 publications

Therapeutic targeting of tumor spheroids in a 3D microphysiological renal cell carcinoma-on-a-chip system [ Neoplasia, 2023, 10.1016/j.neo.2023.100948] PubMed: 37944353
Establishment and characterization of immortalized sweat gland myoepithelial cells [ Sci Rep, 2022, 12(1):7] PubMed: 34997030
Synapse-specific Lrp4 mRNA enrichment requires Lrp4/MuSK signaling, muscle activity and Wnt non-canonical pathway [ Cell Biosci, 2021, 11(1):105] PubMed: 34090516
RKI-1447 suppresses colorectal carcinoma cell growth via disrupting cellular bioenergetics and mitochondrial dynamics. [ J Cell Physiol, 2020, 235(1):254-266] PubMed: 31237697
A novel human colon signet-ring cell carcinoma organoid line: establishment, characterization and application [ Carcinogenesis, 2020, 41(7):993-1004] PubMed: 31740922
[ Cell Rep, 2019, ] PubMed: 31825822
FUS-CHOP Promotes Invasion in Myxoid Liposarcoma through a SRC/FAK/RHO/ROCK-Dependent Pathway [Tornin J Neoplasia, 2018, 20(1):44-56] PubMed: 29190494
Prominent oncogenic roles of EVI1 in breast carcinoma [Wang H Cancer Res, 2017, 77(8):2148-2160] PubMed: 28209621
Rho-associated kinase 1 inhibition is synthetically lethal with von Hippel-Lindau deficiency in clear cell renal cell carcinoma [Thompson JM, et al. Oncogene, 2017, 36(8):1080-1089] PubMed: 27841867
PI3K Catalytic Isoform Alteration Promotes the LIMK1-related Metastasis Through the PAK1 or ROCK1/2 Activation in Cigarette Smoke-exposed Ovarian Cancer Cells. [Park GB, et al. Anticancer Res, 2017, 37(4):1805-1818] PubMed: 28373445

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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.

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