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Prexasertib (LY2606368) Dihydrochloride CHK1 Inhibitor

Name: Prexasertib (LY2606368) Dihydrochloride
Brand: Selleck Chemicals
SKU: S7178
Availability: InStock
Rating: 5 (47 reviews)

Cat.No.S7178

Prexasertib HCl (LY2606368) is an ATP-competitive CHK1 inhibitor with a Ki value of 0.9 nmol/L. For CHK2 and RSK, its IC50 values are 8 nM and 9 nM respectively in cell-free assay.

Chemical Structure

Molecular Weight: 438.31

Jump to Mechanism of Action Cell Culture & Working Concentration Solubility Chemical Information, Storage & Stability Specificity

Quality Control

Batch: Purity: 99.88%

99.88

Products Often Used Together with Prexasertib (LY2606368) Dihydrochloride

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The combination of it and LY3023414 results in tumor regression in OV-90 and Cov504 tumors and significantly enhanced efficacy when compared to singe agent.

Related Targets	DNA/RNA Synthesis CDK Microtubule Associated Ras HSP PD-1/PD-L1 Aurora Kinase Casein Kinase Rho Serine/threonin kinase eIF ROCK Myc Kinesin PLK DHFR PAK PERK DYRK RUNX PP2A PFKFB AP-1 MPS1 Wee1 p21 BMI-1 LIM kinase Nur77 APC
Related Products	AZD7762 Rabusertib (LY2603618) MK-8776 (SCH 900776) CHIR-124 PF-477736 BML-277 (Chk2 Inhibitor II) Prexasertib (LY2606368) CCT245737 (SRA737) GDC-0575 BBI-355 Mad1 Antibody [M18F4] Phospho-Chk1 (Ser345) Antibody [P19M4] CCT241533 hydrochloride SAR-020106 Chk2 Antibody [K6G1] Phospho-Chk1 (Ser317) Antibody [N9E3] Phospho-Chk2 (Thr68) Antibody [L12K12] Chk2 Antibody [C4M24] BBI-2779 14-3-3 γ Antibody [J16F21] LY2880070 CDK5RAP3 Antibody [K12N22]

Cell Culture, Treatment & Working Concentration

Cell Lines	Assay Type	Concentration	Incubation Time	Activity Description	PMID
HeLa cells	Function assay	33 or 100 nmol/L	7 hours	by 7 hours, a subpopulation of cells stained strongly for DSB by both TUNEL and pH2AX	26141948
U-2 OS cells	Function assay	4 nmol/L	24 h	a large shift in cell-cycle populations from G1 and G2–M to S-phase with an accompanied induction of H2AX phosphorylation.	26141948
CCRF-CEM parental cells	Function assay	10 nM	4 h	induced SLFN11 binding to chromatin and increased the chromatin binding of CDC45	29395061
SLFN11-del cells	Function assay	10 nM	4 h	induced SLFN11 binding to chromatin and increased the chromatin binding of CDC45	29395061
K562-WT	Function assay	100 nM	2 h	SLFN11, CDC45 and PCNA were enriched on nascent DNA	29395061
K562-E669Q	Function assay	100 nM	2 h	SLFN11, CDC45 and PCNA were enriched on nascent DNA	29395061
CCRF-CEM parental cells	Function assay	100 nM	2 h	SLFN11, CDC45 and PCNA were enriched on nascent DNA	29395061
HCT-116 cells	Function assay		10 days	inhibited both FANCD2 ubiquitination and increased Rad51 levels, significantly increased sensitivity of HCT-116 cells to F10	30439567
U937 cells	Function assay	3 nM		enhanced the cytotoxicity of CPX-351 at low nanomolar concentrations	30837643
KB-3-1	Function assay			P-glycoprotein substrates identified in KB-3-1 adenocarcinoma cell line, qHTS therapeutic library screen	31515284
KB-8-5-11	Function assay			P-glycoprotein substrates identified in KB-8-5-11 adenocarcinoma cell line, qHTS therapeutic library screen, Potency = 1.2995 μM.	31515284
Click to View More Cell Line Experimental Data

Chemical Information, Storage & Stability

Molecular Weight	438.31	Formula	C₁₈H₁₉N₇O₂.2HCl	Storage (From the date of receipt)	3 years-20°Cpowder
CAS No.	1234015-54-3	Download SDF		Storage of Stock Solutions	1 year-80°Cin solvent 1 month-20°Cin solvent
Synonyms	N/A			Smiles	COC1=C(C(=CC=C1)OCCCN)C2=CC(=NN2)NC3=NC=C(N=C3)C#N.Cl.Cl

Solubility

In vitro
Batch:

DMSO : 17 mg/mL (38.78 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Water : Insoluble

Ethanol : Insoluble

Molarity Calculator

Mass	Concentration	Volume	Molecular Weight
=	×	×

Dilution Calculator Molecular Weight Calculator

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.
Clear solution	5%DMSO 1 Corn oil Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	0.500mg/ml (1.14mM)	Taking the 1 mL working solution as an example, add 50 μL of 10 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.
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.	0.800mg/ml (1.83mM)	Taking the 1 mL working solution as an example, add 50 μL of 16 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.
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.

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.

Mechanism of Action

Targets/IC₅₀/Ki	Chk1 ^[1] (Cell-free assay) 0.9 nM(Ki) Chk2 ^[1] (Cell-free assay) 8 nM RSK ^[1] (Cell-free assay) 9 nM
In vitro	In nonclinical studies, Prexasertib HCl (LY2606368) induced DNA damage as measured by replication catastrophe and increases in pH2A.X, a marker of double-stranded DNA breaks^[1]. Treatment of cells with this compound results in the rapid appearance of TUNEL and pH2AX-positive double-stranded DNA breaks in the S-phase cell population. In a functional assay, it potently abrogated the G2–M checkpoint activated by doxorubicin in p53-deficient HeLa cells with an EC50 of 9 nmol/L. It was broadly antiproliferative with IC50 values typically <50 nmol/L in the most sensitive cell lines with a minority of cell lines showing considerable resistance with IC50's >1,000 nmol/L. This compound requires CDC25A and CDK2 to cause DNA damage^[2].
In vivo	Prexasertib HCl (LY2606368) inhibited tumor growth in cancer xenografts as monotherapy and in combination with other agents^[1]. In an orthotopic SKOV3 ovarian cancer model, it was shown to inhibit the growth of primary tumors and significantly reduce the incidence of metastases and ascites accumulation. This compound also demonstrated efficacy in an SW1990 orthotopic pancreatic cancer model resulting in a 92% inhibition of primary tumor growth and the elimination of metastases to the lymphnode, spleen, and intestine^[3].
References	[1] https://pubmed.ncbi.nlm.nih.gov/27044938/ [2] https://pubmed.ncbi.nlm.nih.gov/26141948/ [3] https://pubmed.ncbi.nlm.nih.gov/24140082/

Applications

Methods	Biomarkers	PMID
Western blot	pS6 (S235/236) / pS6 (S240/244) CHK1 / p-CHK1(Ser345) / γH2AX / Cleaved caspase3	28490518
Immunofluorescence	SLFN11 / CDC45 / EdU	29395061
Growth inhibition assay	IC50 Cell viability	28490518

Clinical Trial Information

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

NCT Number	Recruitment	Conditions	Sponsor/Collaborators	Start Date	Phases
NCT04095221	Active not recruiting	Desmoplastic Small Round Cell Tumor\|Rhabdomyosarcoma	Memorial Sloan Kettering Cancer Center	September 17 2019	Phase 1\|Phase 2
NCT03495323	Completed	Cancer	Dana-Farber Cancer Institute\|Eli Lilly and Company	May 16 2018	Phase 1
NCT03414047	Completed	Ovarian Cancer	Eli Lilly and Company	April 10 2018	Phase 2
NCT03057145	Completed	Solid Tumor	Geoffrey Shapiro MD PhD\|Eli Lilly and Company\|AstraZeneca\|Dana-Farber Cancer Institute	March 10 2017	Phase 1

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:
Would you please suggest a suitable vehicle to dissolve it for in vivo use?

Answer:
It can be dissolved in a vehicle: 5% DMSO+40%PEG 300+5%Tween80+ddH2O for in vivo use in mice (i.p.). This stock concentration reaches 10mg/ml, and can be prepared for work solution as 0.5mg/ml, stable for no longer than 30min.

Question 2:
What is the solubility of it in 20% Captisol?

Answer:
It is a suspension in 20% Captisol, which is fine for oral gavage. You can dissolve this compound in this vehicle to the concentration you need as long as the suspension is homogeneous.

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