2. Cell Cycle/DNA Damage Protein Tyrosine Kinase/RTK Apoptosis
  3. Checkpoint Kinase (Chk) FLT3 PDGFR Apoptosis
  4. CHIR-124

CHIR-124 is a potent and selective Chk1 inhibitor with IC50 of 0.3 nM, and also potently targets PDGFR and FLT3 with IC50s of 6.6 nM and 5.8 nM.

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

CHIR-124 Chemical Structure

CHIR-124 Chemical Structure

CAS No. : 405168-58-3

Size Price Stock Quantity
Solid + Solvent (Highly Recommended)
10 mM * 1 mL in DMSO
ready for reconstitution
 USD 97 In-stock
Solution
10 mM * 1 mL in DMSO USD 97 In-stock
Solid
1 mg USD 35 In-stock
5 mg USD 88 In-stock
10 mg USD 140 In-stock
50 mg USD 420 In-stock
100 mg USD 670 In-stock
200 mg   Get quote  
500 mg   Get quote  

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This product is a controlled substance and not for sale in your territory.

Customer Review

Based on 3 publication(s) in Google Scholar

CHIR-124 Related Antibodies

Top Publications Citing Use of Products

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PDGFR PDGFRβ PDGFRα

  • Biological Activity

  • Protocol

  • Purity & Documentation

  • References

  • Customer Review

Description

CHIR-124 is a potent and selective Chk1 inhibitor with IC50 of 0.3 nM, and also potently targets PDGFR and FLT3 with IC50s of 6.6 nM and 5.8 nM.

IC50 & Target[1]

Chk1

0.3 nM (IC50)

Chk2

697.4 nM (IC50)

PDGFR

6.6 nM (IC50)

FLT3

5.8 nM (IC50)

Cdk4/cyclin D

2.05 μM (IC50)

CDC2/cyclin B

0.5057 μM (IC50)

Cdk2/cyclin A

0.1911 μM (IC50)

bFGFR

2.01 μM (IC50)

FGFR3

1.29 μM (IC50)

VEGFR2 FLK1

0.5779 μM (IC50)

VEGFR1 FLT1

0.4636 μM (IC50)

PKCα

0.58 μM (IC50)

PKAβ I

2.25 μM (IC50)

PKCβ II

0.58 μM (IC50)

PKCγ

0.11 μM (IC50)

ERK2

4.31 μM (IC50)

PKA

0.1031 μM (IC50)

GSK3

0.0233 μM (IC50)

In Vitro

CHIR-124 is 500- to 5,000-fold less active against other cell cycle kinases, such as cyclin-dependent kinase 2/cyclin A (0.19 μM), cdc2/cyclin B (0.51 μM), and cyclin-dependent kinase 4/cyclin D (2.1 μM). CHIR-124 (≥0.9 nM) in combination with SN-38 (≥0.42 nM) causes significant synergy or >10% deviation from additivity in human cancer cell lines expressing mutant p53, and these values overlap and fall below the IC50s for SN-38 (1.2×10-7 M) and CHIR-124 (2.2×10-7 M), respectively. Moreover, CHIR-124 (100 nM) abrogates the SN-38-induced S and G2-M phase cell cycle checkpoints. CHIR-124 (200 nM) leads to a 2.5-fold elevated level of cdc25A above that of the untreated HCT116 p53 / cells. The down-regulation of cdc25A induced by SN-38 is completely restored by concurrent or sequential treatment with CHIR-124, proving that CHIR-124 inhibits the Chk1-mediated destruction of cdc25A in whole cells[1]. CHIR-124 occupies the ATP-binding site, inhibits Chk1 (IC50, 0.3 nM) 2,000-fold more potently than Chk2 (IC50, 0.7 μM)[2].

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

CHIR-124 Related Antibodies
In Vivo

CHIR-124 (10 or 20 mg/kg, p.o.) does not have a significant effect on tumor growth when compared with the vehicle-treated group, but it potentiates the growth inhibitory effect of CPT-11 in a human breast carcinoma xenograft model. The potentiation of the tumor growth inhibitory effect of CPT-11 by CHIR-124 is associated with an increase in apoptosis induction in the tumors. CHIR-124 reverses the suppression of phospho-H3 staining induced by CPT-11, indicating abrogation of the G2-M checkpoint by CHIR-124[1].

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

419.91

Formula

C23H22ClN5O
CAS No.
Appearance

Solid

Color

Light yellow to brown

SMILES

ClC1=CC2=C(NC(C(C3=NC4=C(C=CC=C4)N3)=C2N[C@@H]5CN6CCC5CC6)=O)C=C1
Shipping

Room temperature in continental US; may vary elsewhere.
Storage
Powder -20°C 3 years
4°C 2 years
In solvent -80°C 2 years
-20°C 1 year
Solvent & Solubility
In Vitro: 

DMSO : 7.14 mg/mL (17.00 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 2.3815 mL 11.9073 mL 23.8146 mL
5 mM 0.4763 mL 2.3815 mL 4.7629 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, 2 years; -20°C, 1 year. When stored at -80°C, please use it within 2 years. When stored at -20°C, please use it within 1 year.

  • Molarity Calculator

  • Dilution Calculator

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

Mass
=
Concentration
×
Volume
×
Molecular Weight *

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

This equation is commonly abbreviated as: C1V1 = C2V2

Concentration (start)

C1

×
Volume (start)

V1

=
Concentration (final)

C2

×
Volume (final)

V2

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    40% PEG300    5% Tween-80    45% Saline

    Solubility: ≥ 0.71 mg/mL (1.69 mM); Clear solution

    This protocol yields a clear solution of ≥ 0.71 mg/mL (saturation unknown).

    Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (7.1 mg/mL) to 400 μL PEG300, and mix evenly; then add 50 μL Tween-80 and mix evenly; then add 450 μL Saline to adjust the volume to 1 mL.

    Preparation of Saline: Dissolve 0.9 g sodium chloride in ddH₂O and dilute to 100 mL to obtain a clear Saline solution.
  • Protocol 2

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

    Solubility: ≥ 0.71 mg/mL (1.69 mM); Clear solution

    This protocol yields a clear solution of ≥ 0.71 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 (7.1 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:
%
DMSO +
% 
+
%
Tween-80 +
%
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: 98.57%

COA (254 KB) HNMR (159 KB) LCMS (97 KB)

Handling Instructions (2659 KB)
References
Kinase Assay
[1]

For the CHK1 assay, the kinase domain is expressed in Sf9 insect cells, and a biotinylated cdc25c peptide containing the consensus Chk1/Chk2 phosphorylation site (*)(biotin-[AHX]SGSGS*GLYRSPSMP-ENLNRPR[CONH2]) is used as the substrate. A dilution series of CHIR-124 is mixed with a kinase reaction buffer containing a final concentration of 30 mM Tris-HCl (pH 7.5), 10 mM MgCl2, 2 mM DTT, 4 mM EDTA, 25 mM β-glycerophosphate, 5 mM MnCl2, 0.01% bovine serum albumin, 1.35 nM CHK1 kinase domain, 0.5 μM peptide substrate, and 1 μM unlabeled ATP, plus 5 nM 33P γ-labeled ATP (specific activity =2,000 Ci/mmol). Reactions and detection of the phosphate transfer are carried out by a radioactive method.

MCE has not independently confirmed the accuracy of these methods. They are for reference only.
Animal Administration
[1]

Severe combined immunodeficient mice harboring MDA-MD-435 tumor xenografts are randomized into the following treatment groups of 10: vehicle (captisol) alone, 5 mg/kg CPT-11, 10 mg/kg CHIR-124, 20 mg/kg CHIR-124, 5 mg/kg CPT-11 plus 10 mg/kg CHIR-124, or 5 mg/kg CPT-11 plus 20 mg/kg CHIR-124. Treatment is initiated on the day after randomization (day 1). CPT-11 is given i.p. daily (four times daily) ×5 on days 1 to 5, whereas CHIR-124 is given orally four times daily ×6 on days 2 to 7 in captisol. Percent tumor growth inhibition is defined as % T/C, where T = the treatment group mean, and C = the control group mean. In a similar study, tumors harvested from mice sacrificed on day 4 of treatment are examined for apoptosis by terminal deoxynucleotidyl transferase-mediated nick-end labeling staining and for mitotic index by immunofluorescence labeling with phospho-histone H3 antibody.

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, 2 years; -20°C, 1 year. When stored at -80°C, please use it within 2 years. When stored at -20°C, please use it within 1 year.

Optional Solvent Concentration Solvent Mass 1 mg 5 mg 10 mg 25 mg
DMSO 1 mM 2.3815 mL 11.9073 mL 23.8146 mL 59.5366 mL
5 mM 0.4763 mL 2.3815 mL 4.7629 mL 11.9073 mL
10 mM 0.2381 mL 1.1907 mL 2.3815 mL 5.9537 mL
15 mM 0.1588 mL 0.7938 mL 1.5876 mL 3.9691 mL
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CHIR-124 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.

Keywords:

CHIR-124405168-58-3CHIR124CHIR 124Checkpoint Kinase (Chk)FLT3PDGFRApoptosisCluster of differentiation antigen 135CD135Fms like tyrosine kinase 3Platelet-derived growth factor receptorInhibitorinhibitorinhibit

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