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Rabusertib (LY2603618) CHK1 Inhibitor

Name: Rabusertib (LY2603618)
Brand: Selleck Chemicals
SKU: S2626
Availability: InStock
Rating: 5 (98 reviews)

Cat.No.S2626

Rabusertib (LY2603618, IC-83) is a highly selective Chk1 inhibitor with potential anti-tumor activity in a cell-free assay. IC50=7 nM, showing approximately 100-fold more potent against Chk1 than against any of the other protein kinases evaluated. Rabusertib (LY2603618) induces cell cycle arrest, DNA damage response and autophagy in cancer cells. Rabusertib (LY2603618) induces bak-dependent apoptosis in AML cell lines.

Chemical Structure

Molecular Weight: 436.3

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Quality Control

Batch: Purity: 99.99%

99.99

Related Targets	CDK HSP PD-1/PD-L1 ROCK Wee1 DNA/RNA Synthesis Microtubule Associated Ras KRas Aurora Kinase
Other Chk Inhibitors	CCT245737 (SRA737) AZD7762 MK-8776 (SCH 900776) CHIR-124 Prexasertib (LY2606368) Dihydrochloride PF-477736 BML-277 (Chk2 Inhibitor II) Prexasertib (LY2606368) GDC-0575 BBI-355

Cell Culture, Treatment & Working Concentration

Cell Lines	Assay Type	Concentration	Formulation	Activity Description	PMID
BT474	Kinase assay	1 μM	DMSO	inhibits P-CHK1 levels	23917378
MCF7	Kinase assay	1 μM	DMSO	inhibits P-CHK1 levels	23917378
Hela	Kinase assay	3300 nM	DMSO	inhibits Chk1 activity	24114124
Calu6	Kinase assay	3300 nM	DMSO	inhibits Chk1 activity	24114124
A549	Function assay	~10 μM	DMSO	induces cell cycle arrest	24928205
H1299	Function assay	~10 μM	DMSO	induces cell cycle arrest	24928205
A549	Function assay	~20 μM	DMSO	activates DNA damage sensor kinases	24928205
H1299	Function assay	~20 μM	DMSO	activates DNA damage sensor kinases	24928205
A549	Apoptosis assay	~20 μM	DMSO	induces apoptosis	24928205
H1299	Apoptosis assay	~20 μM	DMSO	induces apoptosis	24928205
A549	Cytoxicity assay	~20 μM	DMSO	induces autophagy	24928205
H1299	Cytoxicity assay	~20 μM	DMSO	induces autophagy	24928205
A549	Function assay	~20 μM	DMSO	increases JNK and p38 MAPK phosphorylation	24928205
H1299	Function assay	~20 μM	DMSO	increases JNK and p38 MAPK phosphorylation	24928205
OHS-50	qHTS assay			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for OHS-50 cells	29435139
SJ-GBM2	qHTS assay			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for SJ-GBM2 cells	29435139
SK-N-MC	qHTS assay			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for SK-N-MC cells	29435139
NB-EBc1	qHTS assay			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for NB-EBc1 cells	29435139
LAN-5	qHTS assay			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for LAN-5 cells	29435139
Click to View More Cell Line Experimental Data

Solubility

In vitro
Batch:

DMSO : 22 mg/mL (50.42 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Water : Insoluble

Ethanol : 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.
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.
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.
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.
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.	1.000mg/ml (2.29mM)	Taking the 1 mL working solution as an example, add 50 μL of 20 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.

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	436.3	Formula	C₁₈H₂₂BrN₅O₃	Storage (From the date of receipt)	3 years-20°Cpowder
CAS No.	911222-45-2	Download SDF		Storage of Stock Solutions	1 year-80°Cin solvent 1 month-20°Cin solvent
Synonyms	IC-83			Smiles	CC1=CC(=C(C=C1Br)NC(=O)NC2=NC=C(N=C2)C)OCC3CNCCO3

Mechanism of Action

Targets/IC₅₀/Ki	Chk1 (Cell-free assay) 7 nM
In vitro	Chk1 is an ATP-dependent serine-threonine kinase and a key component in the DNA replication-monitoring checkpoint system activated by double-stranded breaks (DSBs). Chk1 contributes to all currently defined cell cycle checkpoints, including G1/S, intra-S-phase, G2/M, and the mitotic spindle checkpoint. By inhibiting the activity of chk1, this compound prevents the repair of DNA caused by DNA-damaging agents, thus potentiating the antitumor efficacies of various chemotherapeutic agents. However, preclinical data involving this compound has not been published until now. Inhibition of Chk1 is predicted to enhance the effects of antimetabolites. This chemical treatment impairs DNA synthesis, increases DNA damage (via mitotic defects), induces apoptosis, and has synergistic activity, especially in p53 mutant tumor cells.
In vivo	In xenograft models, this compound delays tumor growth when given in combination.
References	[1] https://pubmed.ncbi.nlm.nih.gov/24114124/ [2] http://mct.aacrjournals.org/cgi/content/short/10/11_MeetingAbstracts/A94?rss=1 [3] https://pubmed.ncbi.nlm.nih.gov/22005528/ [4] https://pubmed.ncbi.nlm.nih.gov/24928205/ [5] https://pubmed.ncbi.nlm.nih.gov/33027721/

Applications

Methods	Biomarkers	Images	PMID
Western blot	p-Chk1 / Chk1 / CDC25A PARP / CF-PARP / p-CDC25C / p-CDK1 / p-CDK2		29326282
Growth inhibition assay	Cell viability		29326282

Clinical Trial Information

(data from https://clinicaltrials.gov, updated on 2024-05-22)

NCT Number	Recruitment	Conditions	Sponsor/Collaborators	Start Date	Phases
NCT01341457	Completed	Solid Tumors	Eli Lilly and Company	May 2011	Phase 1
NCT01296568	Completed	Advanced Cancer	Eli Lilly and Company	February 2011	Phase 1
NCT01139775	Completed	Non Small Cell Lung Cancer	Eli Lilly and Company	February 2011	Phase 1\|Phase 2
NCT00988858	Completed	Non Small Cell Lung Cancer	Eli Lilly and Company	November 2009	Phase 2
NCT00839332	Completed	Pancreatic Neoplasms	Eli Lilly and Company	February 2009	Phase 1\|Phase 2

Tech Support

Handling Instructions

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