1. Cell Cycle/DNA Damage Epigenetics
  2. PARP
  3. K-756

K-756 is a direct and selective tankyrase (TNKS) inhibitor, which inhibits the ADP-ribosylation activity of TNKS1 and TNKS2 with IC50s of 31 and 36 nM, respectively.

For research use only. We do not sell to patients.

K-756 Chemical Structure

K-756 Chemical Structure

CAS No. : 130017-40-2

Size Price Stock Quantity
Solid + Solvent
10 mM * 1 mL in DMSO
ready for reconstitution
USD 143 In-stock
Solution
10 mM * 1 mL in DMSO USD 143 In-stock
Solid
5 mg USD 130 In-stock
10 mg USD 210 In-stock
50 mg USD 720 In-stock
100 mg USD 1150 In-stock
200 mg   Get quote  
500 mg   Get quote  

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Customer Review

Based on 1 publication(s) in Google Scholar

Top Publications Citing Use of Products
  • Biological Activity

  • Protocol

  • Purity & Documentation

  • References

  • Customer Review

Description

K-756 is a direct and selective tankyrase (TNKS) inhibitor, which inhibits the ADP-ribosylation activity of TNKS1 and TNKS2 with IC50s of 31 and 36 nM, respectively.

IC50 & Target[1]

TNKS1

31 nM (IC50)

TNKS2

36 nM (IC50)

In Vitro

K-756 is a novel and selective Wnt/β-catenin pathway inhibitor targeting tankyrase (TNKS). TNKS is one of the members of the PARP family (it is also known as PARP5). K-756 binds to the induced pocket of TNKS and inhibits its enzyme activity. To study the isoform selectivity of K-756, the PARP family enzyme inhibitory activity at 10 μM is evaluated. K-756 inhibits TNKS1 and TNKS2 by 97% and 100%, respectively. In contrast, the inhibitory activity of K-756 against PARP1, PARP2, PARP3, PARP6, PARP7, and PARP11 is less than 13%. K-756 inhibits the cell growth of APC-mutant colorectal cancer COLO 320DM and SW403 cells by inhibiting the Wnt/β-catenin pathway. K-756 strongly inhibits the reporter activity in DLD-1/TCF-Luc cells with an IC50 of 110 nM, but does not inhibit DLD-1/mtTCF-Luc cells, even at 1,000 nM. APC-mutant colorectal cancer cell line COLO 320DM and SW403 cells are treated with K-756 and after 144 hours, cell growth inhibition is measured by an XTT assay. The application of K-756 inhibits the cell growth of COLO 320DM with a GI50 of 780 nM. K-756 also inhibits SW403 with a GI50 of 270 nM[1].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

In Vivo

DLD-1/TCF-Luc cell xenografts are created in SCID mice. Vehicle (0.5% MC400) or K-756 is administered orally once a day for 3 days at 100, 200, and 400 mg/kg. The Wnt/β-catenin signal inhibition in the tumor is detected by measuring FGF20 and LGR5 and luciferase activity. The expression of FGF20 and reporter activity are significantly decreased at doses of 100 mg/kg and above at 3-day administration. The expression of LGR5 is significantly decreased at doses of 200 mg/kg and above at 3-day administration. The maximum inhibitory activity is reached with the administration of K-756 at a dose of 400 mg/kg at 3-day administration. The Wnt/β-catenin signal inhibition at a dose of 400 mg/kg is observed from 1-day administration[1].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

Molecular Weight

433.50

Formula

C24H27N5O3

CAS No.
Appearance

Solid

Color

White to off-white

SMILES

O=C1NC2=C(C=CC=C2)CN1CC3CCN(C4=C5C=C(OC)C(OC)=CC5=NC=N4)CC3

Shipping

Room temperature in continental US; may vary elsewhere.

Storage
Powder -20°C 3 years
4°C 2 years
In solvent -80°C 6 months
-20°C 1 month
Solvent & Solubility
In Vitro: 

DMSO : 4.55 mg/mL (10.50 mM; Need ultrasonic; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)

Preparing
Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 2.3068 mL 11.5340 mL 23.0681 mL
5 mM 0.4614 mL 2.3068 mL 4.6136 mL
View the Complete Stock Solution Preparation Table

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month. When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

  • Molarity Calculator

  • Dilution Calculator

Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)

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Molecular Weight *

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

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In Vivo:

Select the appropriate dissolution method based on your experimental animal and administration route.

For the following dissolution methods, please ensure to first prepare a clear stock solution using an In Vitro approach and then sequentially add co-solvents:
To ensure reliable experimental results, the clarified stock solution can be appropriately stored based on storage conditions. As for the working solution for in vivo experiments, it is recommended to prepare freshly and use it on the same day.
The percentages shown for the solvents indicate their volumetric ratio in the final prepared solution. If precipitation or phase separation occurs during preparation, heat and/or sonication can be used to aid dissolution.

  • Protocol 1

    Add each solvent one by one:  10% DMSO    90% (20% SBE-β-CD in Saline)

    Solubility: ≥ 0.46 mg/mL (1.06 mM); Clear solution

    This protocol yields a clear solution of ≥ 0.46 mg/mL (saturation unknown).

    Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (4.6 mg/mL) to 900 μL 20% SBE-β-CD in Saline, and mix evenly.

    Preparation of 20% SBE-β-CD in Saline (4°C, storage for one week): 2 g SBE-β-CD powder is dissolved in 10 mL Saline, completely dissolve until clear.
  • Protocol 2

    Add each solvent one by one:  10% DMSO    90% Corn Oil

    Solubility: ≥ 0.46 mg/mL (1.06 mM); Clear solution

    This protocol yields a clear solution of ≥ 0.46 mg/mL (saturation unknown). If the continuous dosing period exceeds half a month, please choose this protocol carefully.

    Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (4.6 mg/mL) to 900 μL Corn oil, and mix evenly.

In Vivo Dissolution Calculator
Please enter the basic information of animal experiments:

Dosage

mg/kg

Animal weight
(per animal)

g

Dosing volume
(per animal)

μL

Number of animals

Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.
Please enter your animal formula composition:
%
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+
%
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%
Saline
Recommended: Keep the proportion of DMSO in working solution below 2% if your animal is weak.
The co-solvents required include: DMSO, . All of co-solvents are available by MedChemExpress (MCE). , Tween 80. All of co-solvents are available by MedChemExpress (MCE).
Calculation results:
Working solution concentration: mg/mL
Method for preparing stock solution: mg drug dissolved in μL  DMSO (Stock solution concentration: mg/mL).
The concentration of the stock solution you require exceeds the measured solubility. The following solution is for reference only. If necessary, please contact MedChemExpress (MCE).
Method for preparing in vivo working solution for animal experiments: Take μL DMSO stock solution, add μL . μL , mix evenly, next add μL Tween 80, mix evenly, then add μL Saline.
 If the continuous dosing period exceeds half a month, please choose this protocol carefully.
Please ensure that the stock solution in the first step is dissolved to a clear state, and add co-solvents in sequence. You can use ultrasonic heating (ultrasonic cleaner, recommended frequency 20-40 kHz), vortexing, etc. to assist dissolution.
Purity & Documentation

Purity: 99.76%

References
Kinase Assay
[1]

The activity of each enzyme is measured using a PARP1, PARP2, PARP3, PARP6, PARP7, and PARP11 Chemiluminescent Assay Kit, and a TNKS1 and TNKS2 Histone Ribosylation Assay Kit. Enzymatic reactions are conducted in duplicate at 30°C for 1 hour in a 50 μL mixture containing an assay buffer, an enzyme-coated plate, and a substrate. After the enzymatic reactions, 50 μL of Streptavidin-HRP is added to each well and the plate is incubated at room temperature for an additional 30 minutes. 100 μLs of developer reagents are added to the wells and luminescence is measured using a Synergy2 microplate reader. The luminescence data are analyzed using the GraphPad Prism software program[1].

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

Cell Assay
[1]

For the cell viability assay, APC-mutant colorectal cancer cell line COLO 320DM and SW403 cells are seeded in 96-well white plates. siRNAs are reverse transfected by RNAiMax. After 144 hours, a cell viability assay is performed using a Cell Titer-Glo Luminescent Cell Viability Assay Kit. Luciferase activity is measured using a Top count NXT system. For the cell growth inhibition assay, cells are seeded in 96-well plates. The next day, the cells are treated with the compounds (e.g., K-756, 0.1 nM, 1 nM, 10 nM, 100 nM, 1 μM and 10 μM). After 0, 72, or 144 hours of incubation, XTT reagent is added to the cells. After 3 hours of incubation, the formation of formazan dye from tetrazolium salt XTT is measured using a SpectraMax 340PC system[1].

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

Animal Administration
[1]

Mice[1]
SCID mice (CB17/Icr-Prkdcscid/CrlCrlj, male, 5 weeks old) are subcutaneously implanted with 5×106 cells of DLD-1/TCF-Luc cells. After 13 days, the mice with a tumor volume of 236.38 to 595.80 mm3 are divided into groups of 5 animals. On the day after grouping, 0.5% MC 400 or K-756 (100, 200, and 400 mg/kg) is orally administered to the mice once a day for 3 days. Twenty-four hours after the last administration of first and second day and 25 hours after the last administration of the third day, the tumor tissues are collected from the mice and frozen in liquid nitrogen. Tumor total RNA is extracted using an RNeasy mini Kit and reverse-transcribed using VILO reagent. An RT-PCR is performed.

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

References

Complete Stock Solution Preparation Table

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month. When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

Optional Solvent Concentration Solvent Mass 1 mg 5 mg 10 mg 25 mg
DMSO 1 mM 2.3068 mL 11.5340 mL 23.0681 mL 57.6701 mL
5 mM 0.4614 mL 2.3068 mL 4.6136 mL 11.5340 mL
10 mM 0.2307 mL 1.1534 mL 2.3068 mL 5.7670 mL
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K-756 Related Classifications

Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

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