KIRA6

Alias: KIRA6; KIRA 6; KIRA-6
Cat No.:V23244 Purity: ≥98%
KIRA6 (KIRA-6) is a novel, potent and ATP-competitive allosteric IRE1α inhibitor (IC50 of 0.6 µM) with anti-inflammatory and immune-modulating properties.
KIRA6 Chemical Structure CAS No.: 1589527-65-0
Product category: IRE1
This product is for research use only, not for human use. We do not sell to patients.
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Product Description

KIRA6 (KIRA-6) is a novel, potent, allosteric IRE1 inhibitor with anti-inflammatory and immune-modulating properties (IC50 of 0.6 µM). KIRA6 was created to block IRE1α-mediated cell death and has since been shown to support cell survival and stop ER stress-induced cell aging in vivo.

Biological Activity I Assay Protocols (From Reference)
Targets
IRE1α (IC50 = 0.6 µM)
ln Vitro
KIRA6 inhibits Tg's autophosphorylation of IRE1α and Tm's splicing of XBP1 mRNA in INS-1 cells in a dose-dependent manner[1].
ln Vivo
KIRA6 protects the functional viability of photoreceptors intravitreally in rat models of ER stress-induced retinal degeneration. Systematically, KIRA6 protects pancreatic β-cells in Akita diabetic mice, boosts insulin, and lowers hyperglycemia. In vivo, KIRA6 inhibits IRE1α to maintain cell viability and function in a variety of cells and rodent tissues under ER stress. When administered intraperitoneally (i.p.) to BALB/c mice at a dose of 10 mg/kg, KIRA6 has a good plasma AUC (AUC 0-24h = 14.3 μM*h) and a moderate clearance (22.4 mL/min/kg). The drug has a 3.90-hour half-life, a Cmax of 3.3 μM, and plasma levels at 4 and 8 hours of 1.2 μM and 0.33 μM, respectively[1].
Cell Assay
Drugs were administered to cells at different concentrations.
Animal Protocol
BALB/c mice
10 mg/kg
i.p.
References

[1]. Cell . 2014 Jul 31;158(3):534-48.

These protocols are for reference only. InvivoChem does not independently validate these methods.
Physicochemical Properties
Molecular Formula
C28H25F3N6O
Molecular Weight
518.5329
Exact Mass
518.20
Elemental Analysis
C, 64.86; H, 4.86; F, 10.99; N, 16.21; O, 3.09
CAS #
1589527-65-0
Related CAS #
1589527-65-0
Appearance
Solid powder
SMILES
CC(C)(C)C1=NC(=C2N1C=CN=C2N)C3=CC=C(C4=CC=CC=C43)NC(=O)NC5=CC=CC(=C5)C(F)(F)F
InChi Key
NOHQEAFAESMMDX-UHFFFAOYSA-N
InChi Code
InChI=1S/C28H25F3N6O/c1-27(2,3)25-36-22(23-24(32)33-13-14-37(23)25)20-11-12-21(19-10-5-4-9-18(19)20)35-26(38)34-17-8-6-7-16(15-17)28(29,30)31/h4-15H,1-3H3,(H2,32,33)(H2,34,35,38)
Chemical Name
1-[4-(8-amino-3-tert-butylimidazo[1,5-a]pyrazin-1-yl)naphthalen-1-yl]-3-[3-(trifluoromethyl)phenyl]urea
Synonyms
KIRA6; KIRA 6; KIRA-6
HS Tariff Code
2934.99.9001
Storage

Powder      -20°C    3 years

                     4°C     2 years

In solvent   -80°C    6 months

                  -20°C    1 month

Shipping Condition
Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)
Solubility Data
Solubility (In Vitro)
DMSO: 25~60 mg/mL (48.2~115.7 mM)
Ethanol: ~60 mg/mL (~115.7 mM)
Solubility (In Vivo)
Solubility in Formulation 1: ≥ 0.5 mg/mL (0.96 mM) (saturation unknown) in 10% DMSO + 40% PEG300 + 5% Tween80 + 45% Saline (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 5.0 mg/mL clear DMSO stock solution to 400 μL PEG300 and mix evenly; then add 50 μL Tween-80 to the above solution and mix evenly; then add 450 μL normal saline to adjust the volume to 1 mL.
Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH₂ O to obtain a clear solution.

Solubility in Formulation 2: ≥ 0.5 mg/mL (0.96 mM) (saturation unknown) in 10% DMSO + 90% (20% SBE-β-CD in Saline) (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 5.0 mg/mL clear DMSO stock solution to 900 μL of 20% SBE-β-CD physiological saline solution and mix evenly.
Preparation of 20% SBE-β-CD in Saline (4°C,1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution.

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Solubility in Formulation 3: ≥ 0.5 mg/mL (0.96 mM) (saturation unknown) in 10% DMSO + 90% Corn Oil (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 5.0 mg/mL clear DMSO stock solution to 900 μL of corn oil and mix evenly.


 (Please use freshly prepared in vivo formulations for optimal results.)
Preparing Stock Solutions 1 mg 5 mg 10 mg
1 mM 1.9285 mL 9.6426 mL 19.2853 mL
5 mM 0.3857 mL 1.9285 mL 3.8571 mL
10 mM 0.1929 mL 0.9643 mL 1.9285 mL

*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.

Calculator

Molarity Calculator allows you to calculate the mass, volume, and/or concentration required for a solution, as detailed below:

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An example of molarity calculation using the molarity calculator is shown below:
What is the mass of compound required to make a 10 mM stock solution in 5 ml of DMSO given that the molecular weight of the compound is 350.26 g/mol?
  • Enter 350.26 in the Molecular Weight (MW) box
  • Enter 10 in the Concentration box and choose the correct unit (mM)
  • Enter 5 in the Volume box and choose the correct unit (mL)
  • Click the “Calculate” button
  • The answer of 17.513 mg appears in the Mass box. In a similar way, you may calculate the volume and concentration.

Dilution Calculator allows you to calculate how to dilute a stock solution of known concentrations. For example, you may Enter C1, C2 & V2 to calculate V1, as detailed below:

What volume of a given 10 mM stock solution is required to make 25 ml of a 25 μM solution?
Using the equation C1V1 = C2V2, where C1=10 mM, C2=25 μM, V2=25 ml and V1 is the unknown:
  • Enter 10 into the Concentration (Start) box and choose the correct unit (mM)
  • Enter 25 into the Concentration (End) box and select the correct unit (mM)
  • Enter 25 into the Volume (End) box and choose the correct unit (mL)
  • Click the “Calculate” button
  • The answer of 62.5 μL (0.1 ml) appears in the Volume (Start) box
g/mol

Molecular Weight Calculator allows you to calculate the molar mass and elemental composition of a compound, as detailed below:

Note: Chemical formula is case sensitive: C12H18N3O4  c12h18n3o4
Instructions to calculate molar mass (molecular weight) of a chemical compound:
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Definitions of molecular mass, molecular weight, molar mass and molar weight:
  • Molecular mass (or molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12)
  • Molar mass (molar weight) is the mass of one mole of a substance and is expressed in g/mol.
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Reconstitution Calculator allows you to calculate the volume of solvent required to reconstitute your vial.

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  • The answer appears in the Volume (to add to vial) box
In vivo Formulation Calculator (Clear solution)
Step 1: Enter information below (Recommended: An additional animal to make allowance for loss during the experiment)
Step 2: Enter in vivo formulation (This is only a calculator, not the exact formulation for a specific product. Please contact us first if there is no in vivo formulation in the solubility section.)
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Calculation results

Working concentration mg/mL;

Method for preparing DMSO stock solution mg drug pre-dissolved in μL DMSO (stock solution 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 stock solution, next add μL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O,mix and clarify.

(1) Please be sure that the solution is clear before the addition of next solvent. Dissolution methods like vortex, ultrasound or warming and heat may be used to aid dissolving.
             (2) Be sure to add the solvent(s) in order.

Biological Data
  • KIRA6 inhibits IRE1α Terminal UPR outputs and apoptosis. Cell . 2014 Jul 31;158(3):534-48.
  • KIRA6 reduces ER stress-induced death of cultured cells and in pancreatic islet explants. Cell . 2014 Jul 31;158(3):534-48.
  • Intravitreal KIRA6 preserves photoreceptor cell numbers and function under ER stress. Cell . 2014 Jul 31;158(3):534-48.
  • Systemic KIRA6 attenuates β-cell functional loss, increases insulin levels, and ameliorates hyperglycemia in the Akita mouse. Cell . 2014 Jul 31;158(3):534-48.
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