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Varespladib (LY315920) Phospholipase (e.g. PLA) inhibitor

Name: Varespladib (LY315920)
Brand: Selleck Chemicals
SKU: S1110
Availability: InStock
Rating: 5 (10 reviews)

Cat.No.S1110

Varespladib (LY315920) is a potent and selective human non-pancreatic secretory phospholipase A2 (hnsPLA) inhibitor with IC50 of 7 nM, and it has reached Phase 3.

Chemical Structure

Molecular Weight: 380.39

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Quality Control

Batch: Purity: 99.99%

99.99

Related Targets	Dehydrogenase HSP Transferase P450 (e.g. CYP17) PDE phosphatase PPAR Vitamin Carbohydrate Metabolism Mitochondrial Metabolism
Other Phospholipase (e.g. PLA) Inhibitors	Darapladib (SB-480848) GW4869 U-73122 Tanshinone I Quinacrine 2HCl (E/Z)-Polydatin Melittin Trigonelline FIPI CAY10593 (VU0155069)

Solubility

In vitro
Batch:

DMSO : 76 mg/mL (199.79 mM) Warmed with 50°C water bath; Ultrasonicated;
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Ethanol : 1 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.	0.950mg/ml (2.50mM)	Taking the 1 mL working solution as an example, add 50 μL of 19 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.

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	380.39	Formula	C₂₁H₂₀N₂O₅	Storage (From the date of receipt)	3 years-20°Cpowder
CAS No.	172732-68-2	Download SDF		Storage of Stock Solutions	1 year-80°Cin solvent 1 month-20°Cin solvent
Synonyms	N/A			Smiles	CCC1=C(C2=C(N1CC3=CC=CC=C3)C=CC=C2OCC(=O)O)C(=O)C(=O)N

Mechanism of Action

Features	A potent and selective secretory phospholipase A2 inhibitor.
Targets/IC₅₀/Ki	hnsPLA2 (Cell-free assay) 7 nM
In vitro	Varespladib (LY315920) exhibits a significant inhibitory effect on sPLA2 activity in serum from various species including rat, rabbit, guinea pig and human with IC50 of 8.1 nM, 5.0 nM, 3.2 nM and 6.2 nM, respectively. In BAL cells challenged with human sPLA2, this compound at doses ranging from 0.1 μM–3 μM reduces the formation of thromboxane mediated by human sPLA2 in a concentration-dependent manner with an IC50 of approximately 0.8 μM. In human conjunctival epithelial cell line (HCjE), it (10 μM) significantly inhibits all-trans-retinoic acid (RA) -induced membrane-associated mucin MUC16 expression by 100% at 24 hours and 99% at 48 hours.
In vivo	Ex vivo, LY315920 at doses ranging from 3 mg/kg to 30 mg/kg via i.v. inhibits human sPLA2-induced release of thromboxane from guinea pig BAL cells with ED50 of 16.1 mg/kg. In Transgenic Mice Expressing Human sPLA2, both oral and i.v. administration of this compound (0.3 mg/kg–3 mg/kg) abolishes serum sPLA2 activity in a dose and time dependent manner.
References	[1] https://pubmed.ncbi.nlm.nih.gov/8978844/ [2] https://pubmed.ncbi.nlm.nih.gov/10027849/ [3] https://pubmed.ncbi.nlm.nih.gov/16249480/

Clinical Trial Information

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

NCT Number	Recruitment	Conditions	Sponsor/Collaborators	Start Date	Phases
NCT01359605	Completed	Healthy Volunteers	Anthera Pharmaceuticals	June 2011	Phase 1
NCT01359579	Terminated	Renal Impairment	Anthera Pharmaceuticals	June 2011	Phase 1

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