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Obacunone (AI3-37934) Aromatase inhibitor

Name: Obacunone (AI3-37934)
Brand: Selleck Chemicals
SKU: S3784
Availability: InStock
Rating: 5 (3 reviews)

Cat.No.S3784

Obacunone (AI3-37934, CCRIS 8657), a natural compound present in citrus fruits, has been demonstrated for various biological activities including anti-cancer and anti-inflammatory properties. This compound significantly inhibits aromatase activity in an in vitro enzyme assay with an IC50 value of 28.04 μM; it is also a novel activator of Nrf2.

Chemical Structure

Molecular Weight: 454.51

Jump to Mechanism of Action Solubility Chemical Information, Storage & Stability Specificity

Quality Control

Batch: Purity: 99.85%

99.85

Related Targets	Adrenergic Receptor Estrogen/progestogen Receptor GPR Androgen Receptor Glucocorticoid Receptor ACE RAAS Opioid Receptor THR PGES 5-alpha Reductase CCK receptor Mineralocorticoid Receptor GHSR SSTR TSH Receptor GNRH Receptor PGDS
Related Products	Fadrozole (CGS16949A) alpha-Naphthoflavone Aromatase Antibody [H2G4]

Chemical Information, Storage & Stability

Molecular Weight	454.51	Formula	C₂₆H₃₀O₇	Storage (From the date of receipt)	3 years-20°Cpowder
CAS No.	751-03-1	Download SDF		Storage of Stock Solutions	1 year-80°Cin solvent 1 month-20°Cin solvent
Synonyms	CCRIS 8657			Smiles	CC1(C2CC(=O)C3(C(C2(C=CC(=O)O1)C)CCC4(C35C(O5)C(=O)OC4C6=COC=C6)C)C)C

Solubility

In vitro
Batch:

DMSO : 90 mg/mL (198.01 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

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 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.	0.4mg/ml (0.88mM)	Taking the 1 mL working solution as an example, add 50 μL of 8 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.
Clear solution	5% DMSO 1 95% Corn oil Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	0.4mg/ml (0.88mM)	Taking the 1 mL working solution as an example, add 50 μL of 8 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.
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	Nrf2 ^[2] Aromatase ^[1] (Cell-free assay) 28.4 μM
In vitro	Obacunone (AI3-37934) is a compound that strongly inhibits MCF-7 cell proliferation without affecting non-malignant breast cells. Treatment with this compound increases apoptosis by upregulating expression of the pro-apoptotic protein Bax and down-regulating the anti-apoptotic protein Bcl2, as well as inducing G1 cell cycle arrest. In addition, it significantly inhibits aromatase activity in an in vitro enzyme assay. Exposure of MCF-7 breast cancer cells to obacunone down-regulates expression of inflammatory molecules including nuclear factor-kappa B (NF-kB) and cyclooxygenase-2 (COX-2). It inhibits COX-2 and NF-kB by activation of the p38 mitogen-activated protein kinase (MAPK). Obacunone is reported as a glutathione S-transferase (GST) enzyme inducer as well as a neuroprotective agent acting by induction of heme oxygenase-1 via the p38 MAPK pathway^[1]. It is a novel activator of Nrf2 by decreasing Nrf2 ubiquitination and increasing its stability. This compound can effectively protect cells from oxidative stress by activating the Nrf2 pathway. It could induce the expression of the ARE-dependent luciferase gene in a dose-dependent manner^[2].
In vivo	Obacunone (AI3-37934) strongly inhibits bleomycin-induced lung fibrosis in mice upon systemic administration. It can inhibit cancer proliferation and has some therapeutic effects on cardiovascular diseases^[2]. In vitro and animal studies suggest that this compound and a few other limonoids may have potential anticarcinogenic activity against certain types of cancers. A 500-mg/kg (of body weight) dose per day is well tolerated and does not have adverse effects in rats, indicating a low toxicity^[3].
References	[1] https://pubmed.ncbi.nlm.nih.gov/24927687/ [2] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5003787/ [3] https://pubmed.ncbi.nlm.nih.gov/22843534/

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