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Isochenodeoxycholic acid (isoCDCA)

Cat No.:V62041 Purity: ≥98%
Isochenodeoxycholic acid (isoCDCA) is a human fecal bile acid.
Isochenodeoxycholic acid (isoCDCA)
Isochenodeoxycholic acid (isoCDCA) Chemical Structure CAS No.: 566-24-5
Product category: Others 12
This product is for research use only, not for human use. We do not sell to patients.
Size Price Stock Qty
1mg
5mg
10mg
Other Sizes
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Product Description
Isochenodeoxycholic acid (isoCDCA) is a human fecal bile acid. Isochenodeoxycholic acid has a cytoprotective effect against ethanol injury in HepG2 cells. Isochenodeoxycholic acid is the major metabolite of orally administered ursodeoxycholic acid (UDCA).
Isochenodeoxycholic acid (isoCDCA) (CAS#: 566-24-5) is a secondary bile acid and a stereoisomer (3beta,7alpha-dihydroxy-5beta-cholan-24-oic acid) of the primary bile acid chenodeoxycholic acid. It is produced from chenodeoxycholic acid by gut bacteria and serves as a reference standard and impurity for pharmaceutical analysis.
Biological Activity I Assay Protocols (From Reference)
Targets
Isochenodeoxycholic acid does not have a distinct therapeutic protein target but acts via its physicochemical properties as a bile acid. It interacts with membrane lipids (detergent effect) and activates nuclear receptors such as FXR (Farnesoid X Receptor) and TGR5, though typically with different potency compared to its more common epimer, ursodeoxycholic acid (UDCA).
ln Vitro
In vitro, isoCDCA activates bile acid receptors, which can be measured in reporter gene assays. It also modulates lipid metabolism in cultured hepatocytes, affecting the expression of genes involved in cholesterol synthesis and bile acid transport. It is used as a metabolite standard to verify the purity of UDCA preparations via HPLC.
ln Vivo
As a secondary bile acid, its in vivo activity is related to the regulation of lipid and cholesterol metabolism when administered exogenously. It can promote bile flow (choleresis) and influence the intestinal absorption of fats and fat-soluble vitamins, mirroring the general physiological roles of other dihydroxy bile acids in the enterohepatic circulation.
Enzyme Assay
Isochenodeoxycholic acid is primarily used as a reference compound in analytical chemistry assays. A non-cellular HPLC method is used for its identification and quantification. A reference standard of isoCDCA is dissolved in mobile phase (e.g., acetonitrile-phosphate buffer) and injected into an HPLC system with a C18 reverse-phase column. Its retention time and UV absorbance spectrum are compared to a standard curve.
Cell Assay
The compound is not typically tested in functional cellular assays as a primary screen. Instead, it is used as an analytical spike-in control. For example, cell lysates or serum samples are spiked with a known concentration of isoCDCA, and the sample is processed for LC-MS/MS analysis. The recovery of the spiked isoCDCA validates the efficiency of the analytical method for detecting bile acids in biological matrices.
Animal Protocol
In vivo animal protocols for isoCDCA are limited, as it is not a therapeutic candidate. It can be administered intravenously or orally to bile duct-cannulated rats to study bile flow (choleretic effect). For analytical method validation, it is administered to mice or rats (e.g., 10-50 mg/kg oral gavage), and serial blood and bile samples are collected over 24-48 hours to confirm the detection limits of an LC-MS/MS assay.
ADME/Pharmacokinetics
As a secondary bile acid, isoCDCA is passively absorbed from the intestine and undergoes enterohepatic recirculation. It is conjugated with glycine or taurine in the liver and re-secreted into the bile. Its plasma half-life is short (minutes to hours). It is not a drug candidate; its PK properties are characterized for analytical purposes to support impurity profiling.
Toxicity/Toxicokinetics
Isochenodeoxycholic acid is considered an impurity or metabolite in pharmaceutical-grade UDCA. Its toxicity profile is not documented as a standalone compound, but as a bile acid, very high levels can cause cholestasis (impaired bile flow) and hepatotoxicity due to its detergent properties. It is not intended for direct human consumption as a therapeutic agent.
References
[1]. Marschall HU, et al. Isoursodeoxycholic acid: metabolism and therapeutic effects in primary biliary cirrhosis. J Lipid Res. 2001 May;42(5):735-42.
Additional Infomation
3β,7α-Dihydroxy-5β-cholan-24-acid is a dihydroxy-5β-cholanic acid, wherein the two hydroxyl groups are located at the 3β and 7α positions, respectively. It is the 3β-hydroxy epimer of chenodeoxycholic acid. It plays a role in human metabolism. It is a bile acid, a 7α-hydroxy steroid, a 3β-hydroxy steroid, and a dihydroxy-5β-cholanic acid. It is the conjugate acid of 3β,7α-dihydroxy-5β-cholan-24-acid.
IsoCDCA is primarily used as a pharmaceutical reference standard for quality control in the production of ursodeoxycholic acid (UDCA). It is an epimer of chenodeoxycholic acid and is listed as an impurity (Impurity K) in pharmacopoeial monographs (e.g., EP). It has no therapeutic application or drug approval status.
These protocols are for reference only. InvivoChem does not independently validate these methods.
Physicochemical Properties
Molecular Formula
C24H40O4
Molecular Weight
392.57
Exact Mass
392.293
CAS #
566-24-5
PubChem CID
164673
Appearance
White to off-white solid powder
LogP
4.477
Hydrogen Bond Donor Count
3
Hydrogen Bond Acceptor Count
4
Rotatable Bond Count
4
Heavy Atom Count
28
Complexity
605
Defined Atom Stereocenter Count
10
SMILES
CC(CCC(=O)O)C1CCC2C1(CCC3C2C(CC4C3(CCC(C4)O)C)O)C
InChi Key
RUDATBOHQWOJDD-JGFDLHJZSA-N
InChi Code
InChI=1S/C24H40O4/c1-14(4-7-21(27)28)17-5-6-18-22-19(9-11-24(17,18)3)23(2)10-8-16(25)12-15(23)13-20(22)26/h14-20,22,25-26H,4-13H2,1-3H3,(H,27,28)/t14-,15+,16+,17-,18+,19+,20-,22+,23+,24-/m1/s1
Chemical Name
(4R)-4-[(3S,5S,7R,8R,9S,10S,13R,14S,17R)-3,7-dihydroxy-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl]pentanoic acid
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

Note: This product requires protection from light (avoid light exposure) during transportation and storage.
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)
May dissolve in DMSO (in most cases), if not, try other solvents such as H2O, Ethanol, or DMF with a minute amount of products to avoid loss of samples
Solubility (In Vivo)
Note: Listed below are some common formulations that may be used to formulate products with low water solubility (e.g. < 1 mg/mL), you may test these formulations using a minute amount of products to avoid loss of samples.

Injection Formulations
(e.g. IP/IV/IM/SC)
Injection Formulation 1: DMSO : Tween 80: Saline = 10 : 5 : 85 (i.e. 100 μL DMSO stock solution 50 μL Tween 80 850 μL Saline)
*Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH ₂ O to obtain a clear solution.
Injection Formulation 2: DMSO : PEG300Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL DMSO 400 μLPEG300 50 μL Tween 80 450 μL Saline)
Injection Formulation 3: DMSO : Corn oil = 10 : 90 (i.e. 100 μL DMSO 900 μL Corn oil)
Example: Take the Injection Formulation 3 (DMSO : Corn oil = 10 : 90) as an example, if 1 mL of 2.5 mg/mL working solution is to be prepared, you can take 100 μL 25 mg/mL DMSO stock solution and add to 900 μL corn oil, mix well to obtain a clear or suspension solution (2.5 mg/mL, ready for use in animals).
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Injection Formulation 4: DMSO : 20% SBE-β-CD in saline = 10 : 90 [i.e. 100 μL DMSO 900 μL (20% SBE-β-CD in saline)]
*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.
Injection Formulation 5: 2-Hydroxypropyl-β-cyclodextrin : Saline = 50 : 50 (i.e. 500 μL 2-Hydroxypropyl-β-cyclodextrin 500 μL Saline)
Injection Formulation 6: DMSO : PEG300 : castor oil : Saline = 5 : 10 : 20 : 65 (i.e. 50 μL DMSO 100 μLPEG300 200 μL castor oil 650 μL Saline)
Injection Formulation 7: Ethanol : Cremophor : Saline = 10: 10 : 80 (i.e. 100 μL Ethanol 100 μL Cremophor 800 μL Saline)
Injection Formulation 8: Dissolve in Cremophor/Ethanol (50 : 50), then diluted by Saline
Injection Formulation 9: EtOH : Corn oil = 10 : 90 (i.e. 100 μL EtOH 900 μL Corn oil)
Injection Formulation 10: EtOH : PEG300Tween 80 : Saline = 10 : 40 : 5 : 45 (i.e. 100 μL EtOH 400 μLPEG300 50 μL Tween 80 450 μL Saline)


Oral Formulations
Oral Formulation 1: Suspend in 0.5% CMC Na (carboxymethylcellulose sodium)
Oral Formulation 2: Suspend in 0.5% Carboxymethyl cellulose
Example: Take the Oral Formulation 1 (Suspend in 0.5% CMC Na) as an example, if 100 mL of 2.5 mg/mL working solution is to be prepared, you can first prepare 0.5% CMC Na solution by measuring 0.5 g CMC Na and dissolve it in 100 mL ddH2O to obtain a clear solution; then add 250 mg of the product to 100 mL 0.5% CMC Na solution, to make the suspension solution (2.5 mg/mL, ready for use in animals).
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Oral Formulation 3: Dissolved in PEG400
Oral Formulation 4: Suspend in 0.2% Carboxymethyl cellulose
Oral Formulation 5: Dissolve in 0.25% Tween 80 and 0.5% Carboxymethyl cellulose
Oral Formulation 6: Mixing with food powders


Note: Please be aware that the above formulations are for reference only. InvivoChem strongly recommends customers to read literature methods/protocols carefully before determining which formulation you should use for in vivo studies, as different compounds have different solubility properties and have to be formulated differently.

 (Please use freshly prepared in vivo formulations for optimal results.)
Preparing Stock Solutions 1 mg 5 mg 10 mg
1 mM 2.5473 mL 12.7366 mL 25.4732 mL
5 mM 0.5095 mL 2.5473 mL 5.0946 mL
10 mM 0.2547 mL 1.2737 mL 2.5473 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:

  • Calculate the Mass of a compound required to prepare a solution of known volume and concentration
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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:
  • To calculate molar mass of a chemical compound, please enter the chemical/molecular formula and click the “Calculate’ button.
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.

  • Enter the mass of the reagent and the desired reconstitution concentration as well as the correct units
  • Click the “Calculate” button
  • 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.

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