AZ20 | ATM/ATR inhibitor | CAS 1233339-22-4

Jump to

Quality Control

Batch: Purity: 99.92%

99.92

Related Targets	PI3K Akt mTOR GSK-3 DNA-PK AMPK PDPK1 PTEN PP2A PDK
Other ATM/ATR Inhibitors	Ceralasertib (AZD6738) AZD1390 Berzosertib (VE-822) Lartesertib (M4076) Camonsertib (RP-3500) KU-60019 KU-55933 VE-821 AZD0156 Mirin

Cell Culture, Treatment & Working Concentration

Cell Lines	Assay Type	Concentration	Incubation Time	Activity Description	PMID
HT29	Function assay		1 hr	Inhibition of ATR-mediated CHK1 phosphorylation at serine 345 in human HT29 cells after 1 hr in presence of 4-nitroquinoline 1-oxide, IC50=0.05μM	23394205
LoVo	Growth inhibition assay		72 hrs	Growth inhibition of human LoVo cells after 72 hrs by MTS assay, GI50=0.2μM	23394205
MDA-MB-468	Function assay			Inhibition of mTOR-mediated AKT phosphorylation at serine 473 in human MDA-MB-468 cells, IC50=2.4μM	23394205
LoVo	Antitumor assay	50 mg/kg	13 days	Antitumor activity against human LoVo cells xenografted in Swiss nu/nu mouse assessed as tumor growth inhibition at 50 mg/kg, po qd for 13 days relative to control	23394205
LoVo	Antitumor assay	25 mg/kg	13 days	Antitumor activity against human LoVo cells xenografted in Swiss nu/nu mouse assessed as tumor growth inhibition at 25 mg/kg, po bid for 13 days relative to control	23394205
HT29	Function assay		60 mins	Inhibition of ATR in human HT29 cells after 60 mins by Hoechst 33258 staining-based assay, IC50=0.061μM	30346772
LoVo	Cytotoxicity assay		72 hrs	Cytotoxicity against human LoVo cells after 72 hrs by MTS assay, GI50=0.2μM	30346772
MDA-MB-468	Function assay			Inhibition of mTOR in human MDA-MB-468 cells assessed as decrease in 70S6K S235/236 phosphorylation, IC50=0.72μM	30346772
HT-29	Cytotoxicity assay		72 hrs	Cytotoxicity against human HT-29 cells after 72 hrs by MTS assay, GI50=0.97μM	30346772
LoVo	Function assay	25 mg/kg	8 hrs	Plasma concentration in Swiss nu/nu mouse xenografted with human LoVo cells at 25 mg/kg, po bid after 8 hrs, Cp=1.8μM	30346772
MDA-MB-468	Function assay			Inhibition of mTOR in human MDA-MB-468 cells assessed as decrease in AKT phosphorylation at S473 residue, IC50=2.4μM	30346772
LoVo	Function assay	50 mg/kg	8 hrs	Plasma concentration in Swiss nu/nu mouse xenografted with human LoVo cells at 50 mg/kg, po qd after 8 hrs, Cp=3.5μM	30346772
Click to View More Cell Line Experimental Data

Solubility

In vitro
Batch:

DMSO : 83 mg/mL (201.2 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Ethanol : 3 mg/mL

Water : Insoluble

Molarity Calculator

Mass	Concentration	Volume	Molecular Weight
Mass value Mass unit	Concentration value Concentration unit	Volume value Volume unit	Molecular weight (g/mol)

Dilution Calculator Molecular Weight Calculator

In vivo batch selection In vivo Batch:
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.
Clear solution	5%DMSO 1 40%PEG300 2 5%Tween80 3 50%ddH2O Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	5.000mg/ml (12.12mM)	Taking the 1 mL working solution as an example, add 50 μL of 100 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 1 95% Corn oil Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	0.410mg/ml (0.99mM)	Taking the 1 mL working solution as an example, add 50 μL of 8.2 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.
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.

In vivo Formulation Calculator (Clear solution)

Step 1: Enter information below (Recommended: An additional animal making an allowance for loss during the experiment)

Dosage: mg/kg

Average weight of animals: g

Dosing volume per animal: μL

Number of animals:

Step 2: Enter the in vivo formulation (This is only the calculator, not formulation. Please contact us first if there is no in vivo formulation at the solubility Section.)

% DMSO

%

% Tween 80

% ddH₂O

% DMSO

+

%

Calculation results:

Working concentration: mg/ml;

Method for preparing DMSO master liquid: mg drug pre-dissolved in μL DMSO ( Master liquid concentration mg/mL, Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug. )

Method for preparing in vivo formulation: Take μL DMSO master liquid, next addμL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH₂O, mix and clarify.

Method for preparing in vivo formulation: Take μL DMSO master liquid, next add μL Corn oil, mix and clarify.

Note: 1. Please make sure the liquid is clear before adding the next solvent.
2. Be sure to add the solvent(s) in order. You must ensure that the solution obtained, in the previous addition, is a clear solution before proceeding to add the next solvent. Physical methods such
as vortex, ultrasound or hot water bath can be used to aid dissolving.

Chemical Information, Storage & Stability

Molecular Weight	412.51	Formula	C₂₁H₂₄N₄O₃S	Storage (From the date of receipt)	3 years-20°Cpowder
CAS No.	1233339-22-4	Download SDF		Storage of Stock Solutions	1 year-80°Cin solvent 1 month-20°Cin solvent
Synonyms	N/A			Smiles	CC1COCCN1C2=NC(=NC(=C2)C3(CC3)S(=O)(=O)C)C4=C5C=CNC5=CC=C4

Mechanism of Action

Features	ATR-selective inhibitor with high permeability and good stability.
Targets/IC₅₀/Ki	ATR (Cell-free assay) 5 nM mTOR (Cell-free assay) 38 nM
In vitro	AZ20 shows good selectivity against all of the PI3K isoforms together with ATM and DNA-PK. In vitro, this compound decreases pChk1 Ser345, pChk1 Ser317 and pChk1 Ser296 levels in a concentration-dependent manner. Prolonged exposure with this chemical increases γH2AX pan-nuclear staining, indicative of replication stress. This is associated with S-phase arrest and increase in phospho-histone H3. It induces growth inhibition and cell death in vitro and its profile of activity is distinct from other cytotoxic agents. The cytotoxic effect of this agent can be increased in combination with the selective ATM inhibitor KU-60019.
In vivo	Female nude mice bearing LoVo tumors are treated with AZ20 orally at a dose of 25 mg/kg twice daily or 50 mg/kg once daily for 13 days, led to significant tumor growth inhibition. This is associated with a persistent elevation of γH2AX pan-nuclear staining in xenograft tissue, but a transient increase in mouse bone marrow at therapeutic doses, suggesting a favourable therapeutic index. This compound is assessed for drug−drug interaction (DDI) potential specifically from inhibition of cytochrome P450 enzymes. It is found to inhibit the cytochrome 3A4-mediated metabolism of midazolam by 50% at 10 μM. This chemical has respectable bioavailability in a low dose rat PK study.
References	[1] http://cancerres.aacrjournals.org/cgi/content/meeting_abstract/72/8_MeetingAbstracts/1823 [2] https://pubmed.ncbi.nlm.nih.gov/23394205/

Applications

Methods	Biomarkers	Images	PMID
Growth inhibition assay	IC50		28176818
Western blot	p-CDK1 / CDK1 / p-CDK2 / CDK2 γH2AX / RRM1 / RRM2		28176818

Tech Support

Handling Instructions

Tel: +1-832-582-8158 Ext:3

If you have any other enquiries, please leave a message.

Frequently Asked Questions

Question 1:
If I want to completely block the kinase activity from the in vitro cell lines, how much concentration of it should I use?

Answer:
IC50 5nM was quoted from a previous publication in which the author tested its IC50 in a cell-free assay. In cell culture, many factors, such as membrane permeability and target protein concentration, may affect the efficiency. Each cell line responds to the same compound differently, and it is very difficult to predict the optimized concentration simply based on cell-free data. In cell culture experiments, the required concentration is usually higher. We recommend that you perform a pilot experiment and test different concentrations (50nM to 500μM) to get the optimized condition.

C1=C0/X	C1:	LOG(C1):
C2=C1/X	C2:	LOG(C2):
C3=C2/X	C3:	LOG(C3):
C4=C3/X	C4:	LOG(C4):
C5=C4/X	C5:	LOG(C5):
C6=C5/X	C6:	LOG(C6):
C7=C6/X	C7:	LOG(C7):
C8=C7/X	C8:	LOG(C8):

AZ20 ATM/ATR inhibitor

Chemical Structure

Molecular Weight: 412.51