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RU.521 (RU320521) cGAS inhibitor

Name: RU.521 (RU320521)
Brand: Selleck Chemicals
SKU: S6841
Availability: InStock
Rating: 5 (16 reviews)

Cat.No.S6841

RU.521 (RU320521) is an active, potent and selective inhibitor of cyclic GMP-AMP synthase (cGAS) that inhibits the cGAS-mediated signaling with IC50 of 700 nM. RU.521 binds to the cGAS/dsDNA complex with Kd of 36.2 nM.

Chemical Structure

Molecular Weight: 415.23

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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 cGAS Inhibitors	G150 PF-06928215 IRAK4-IN-4 G140

Solubility

In vitro
Batch:

DMSO : 83 mg/mL (199.88 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Ethanol : 2 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	2% DMSO 1 40% PEG 300 2 5%Tween80 3 53%ddH2O Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	1.000mg/ml (2.41mM)	Taking the 1 mL working solution as an example, add 20 μL of 50 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 530 μL of ddH2O to adjust the volume to 1 mL. The mixed solution should be used immediately for optimal results.
Clear solution	2%DMSO 1 98%Corn oil Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	0.500mg/ml (1.20mM)	Taking the 1 mL working solution as an example, add 20 μL of 25 mg/ml clear DMSO stock solution to 980 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.
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	2%DMSO 1 40%PEG300 2 5%TWEEN80 3 53%ddH2O Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	1.000mg/ml (2.41mM)	Taking the 1 mL working solution as an example, add 20 μL of 50 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 530 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	415.23	Formula	C₁₉H₁₂Cl₂N₄O₃	Storage (From the date of receipt)	3 years -20°C powder
CAS No.	2262452-06-0	--		Storage of Stock Solutions	1 year-80°Cin solvent 1 month-20°Cin solvent
Synonyms	RU320521			Smiles	CC1=C(C(=O)N(N1)C2=NC3=C(N2)C=CC(=C3Cl)Cl)C4C5=CC=CC=C5C(=O)O4

Mechanism of Action

Targets/IC₅₀/Ki	cGAS/dsDNA complex (Cell-free assay) 36.2 nM(Kd) cGAS (Cell-free assay) 700 nM
In vitro	RU.521, a cGAS inhibitor, impares the overexpression of interferon-stimulated genes (ISGs) in response to cytolethal distending toxin (CDT), confirming the crucial role of cGAS-STING axis in CDT-induced type I IFN signaling.
In vivo	RU.521 alleviated the inflammatory response and alleviated the damage induced by oxidative stress, leading to cardiac protection via increased Sirt3 expression in the hearts of mice with sepsis.
References	[1] https://pubmed.ncbi.nlm.nih.gov/28963528/ [2] https://pubmed.ncbi.nlm.nih.gov/34308492/ [3] https://pubmed.ncbi.nlm.nih.gov/32835697/

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