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Cabazitaxel-d6 (TXD 258)

Cat No.:V10500 Purity: ≥97%
Cabazitaxel-d6 is a deuterate form of cabazitaxel.
Cabazitaxel-d6 (TXD 258)
Cabazitaxel-d6 (TXD 258) Chemical Structure CAS No.: 1383561-29-2
Product category: Autophagy
This product is for research use only, not for human use. We do not sell to patients.
Size Price Stock Qty
1mg
5mg
Other Sizes

Other Forms of Cabazitaxel-d6 (TXD 258):

  • Cabazitaxel intermediate
  • DeBoc-Cabazitaxel
  • Cabazitaxel-C13
  • Cabazitaxel (XRP-6258; RPR-116258A; taxoid XRP6258)
  • Cabazitaxel-d9
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Purity & Quality Control Documentation

Purity: ≥98%

Product Description
Cabazitaxel-d6 is a deuterate form of cabazitaxel. Cabazitaxel (also known as RPR-116258A, XRP6258, TXD 258) is a semi-synthetic taxane analog (the natural taxoid 10-deacetylbaccatin III) with potential anticancer activity and improved pharmacological profiles. Cabazitaxel binds to and stabilizes tubulin, resulting in the inhibition of microtubule depolymerization and cell division, cell cycle arrest in the G2/M phase, and the inhibition of tumor cell proliferation. Unlike other taxane compounds, this agent is a poor substrate for the membrane-associated, multidrug resistance (MDR), P-glycoprotein (P-gp) efflux pump and may be useful for treating multidrug-resistant tumors.
Cabazitaxel-d6 (TXD 258) (CAS# 1383561-29-2) is the deuterated form of cabazitaxel, a semisynthetic taxane antineoplastic agent. Its molecular formula is C₄₅H₅₁D₆NO₁₄ and its molecular weight is approximately 840.0 g/mol. Cabazitaxel-d6 is used as an internal standard in liquid chromatography-mass spectrometry (LC-MS) for the quantification of cabazitaxel in biological samples. Cabazitaxel itself is a microtubule inhibitor approved for the treatment of metastatic castration-resistant prostate cancer.
Biological Activity I Assay Protocols (From Reference)
Targets
The primary target of Cabazitaxel-d6, like its non-deuterated form, is the microtubule network. It binds to β-tubulin, promoting the assembly of tubulin dimers into stable microtubules and inhibiting their depolymerization. This prevents cell division and leads to cell cycle arrest and apoptosis in rapidly dividing cancer cells. The deuterium atoms do not alter the pharmacological activity but allow for sensitive detection.
ln Vitro
Drug compounds have been modified to include stable heavy isotopes of carbon, hydrogen, and other elements, mostly as tracers for quantification throughout the drug development process. Due to its potential to impact a drug's pharmacokinetic and metabolic characteristics, deuteration has drawn attention[1].
In vitro, Cabazitaxel-d6 exhibits the same antiproliferative activity as cabazitaxel against various cancer cell lines, including docetaxel-resistant cells. It has been shown to have higher affinity for β-tubulin isoforms and better brain penetration. However, as an analytical standard, its primary use is not for biological activity assays but for quantification in pharmacokinetic studies.
ln Vivo
In accompanying models, Cabazitaxel is noted to have significant antitumor activity. In murine tumor xenografts (colon C38 and pancreas P03), Cabazitaxel elicites complete tumor regressions. Using SF-295 and U251 human glioblastoma cell lines, both orthotopic and subcutaneous murine xenografts are generated. Cabazitaxel treatment leads to complete regression in the majority of subcutaneously implanted tumors. Furthermore, in orthotopic models, Cabazitaxel leads to complete tumor regression in 4 out of 10 U251 tumors.
In vivo, Cabazitaxel-d6 is used in pharmacokinetic studies to measure the concentration of cabazitaxel in plasma and tissues. Its deuterated nature provides a distinct mass shift, allowing it to be distinguished from endogenous or administered cabazitaxel. It is used as a stable isotope-labeled internal standard to improve the accuracy and precision of LC-MS/MS assays.
Enzyme Assay
In vitro enzyme/receptor binding studies are not typically performed with the deuterated form. However, its binding affinity to tubulin can be studied if needed, though it is assumed to be identical to cabazitaxel. For analytical purposes, the compound's purity and mass spectrometric properties are the primary focus.
Cell Assay
In vitro cell-based assays are not relevant for this product, as it is an analytical standard. However, if one were to test it, it would show the same cytotoxicity as cabazitaxel. The deuterium label does not affect cellular uptake or activity, but it is not used for such purposes.
Animal Protocol
Murine tumor xenografts
In vivo animal studies are also not conducted with the deuterated compound as a therapeutic. Instead, it is used in pharmacokinetic studies where animals are administered cabazitaxel, and the internal standard is added to biological samples for quantification. The compound is not administered to animals itself.
ADME/Pharmacokinetics
The pharmacokinetic properties of cabazitaxel, for which this standard is used, include high plasma protein binding, extensive hepatic metabolism, and biliary excretion. The deuterated standard behaves identically in LC-MS, allowing for accurate measurement of cabazitaxel concentrations. It is stored as a powder at -20°C.
Toxicity/Toxicokinetics
The toxicity profile of cabazitaxel includes myelosuppression, hypersensitivity reactions, and gastrointestinal side effects. The deuterated standard is used in trace amounts and does not pose a toxicological risk. Standard laboratory safety precautions apply.
References

[1]. Impact of Deuterium Substitution on the Pharmacokinetics of Pharmaceuticals. Ann Pharmacother. 2019;53(2):211-216.

[2]. Cabazitaxel and indocyanine green co-delivery tumor-targeting nanoparticle for improved antitumor efficacy and minimized drug toxicity. J Drug Target. 2016 Sep 9:1-29.

[3]. Bone-targeted cabazitaxel nanoparticles for metastatic prostate cancer skeletal lesions and pain. Nanomedicine (Lond). 2017 Sep;12(17):2083-2095.

Additional Infomation
Additional information: Cabazitaxel-d6 is the deuterated version of cabazitaxel, with six deuterium atoms replacing hydrogen atoms at specific positions. It is used as an internal standard for pharmacokinetic studies. This product is for research use only and is not intended for therapeutic or diagnostic use.
These protocols are for reference only. InvivoChem does not independently validate these methods.
Physicochemical Properties
Molecular Formula
C45H57NO14
Molecular Weight
835.932394742966
Exact Mass
841.415
CAS #
1383561-29-2
Related CAS #
Cabazitaxel;183133-96-2;Cabazitaxel-d9;1383572-19-7
PubChem CID
57524246
Appearance
White to off-white solid powder
Density
1.3±0.1 g/cm3
Boiling Point
870.7±65.0 °C at 760 mmHg
Flash Point
480.4±34.3 °C
Vapour Pressure
0.0±0.3 mmHg at 25°C
Index of Refraction
1.592
LogP
7.55
Hydrogen Bond Donor Count
3
Hydrogen Bond Acceptor Count
14
Rotatable Bond Count
15
Heavy Atom Count
60
Complexity
1690
Defined Atom Stereocenter Count
11
SMILES
[2H]C([2H])([2H])O[C@H]1C[C@@H]2[C@@](CO2)([C@@H]3[C@@]1(C(=O)[C@@H](C4=C([C@H](C[C@@]([C@H]3OC(=O)C5=CC=CC=C5)(C4(C)C)O)OC(=O)[C@@H]([C@H](C6=CC=CC=C6)NC(=O)OC(C)(C)C)O)C)OC([2H])([2H])[2H])C)OC(=O)C
InChi Key
BMQGVNUXMIRLCK-YHVGWTKXSA-N
InChi Code
InChI=1S/C45H57NO14/c1-24-28(57-39(51)33(48)32(26-17-13-11-14-18-26)46-40(52)60-41(3,4)5)22-45(53)37(58-38(50)27-19-15-12-16-20-27)35-43(8,36(49)34(55-10)31(24)42(45,6)7)29(54-9)21-30-44(35,23-56-30)59-25(2)47/h11-20,28-30,32-35,37,48,53H,21-23H2,1-10H3,(H,46,52)/t28-,29-,30+,32-,33+,34+,35-,37-,43+,44-,45+/m0/s1/i9D3,10D3
Chemical Name
[(1S,2S,3R,4S,7R,9S,10S,12R,15S)-4-acetyloxy-1-hydroxy-15-[(2R,3S)-2-hydroxy-3-[(2-methylpropan-2-yl)oxycarbonylamino]-3-phenylpropanoyl]oxy-10,14,17,17-tetramethyl-11-oxo-9,12-bis(trideuteriomethoxy)-6-oxatetracyclo[11.3.1.03,10.04,7]heptadec-13-en-2-yl] benzoate
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)
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 1.1963 mL 5.9814 mL 11.9627 mL
5 mM 0.2393 mL 1.1963 mL 2.3925 mL
10 mM 0.1196 mL 0.5981 mL 1.1963 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
  • Calculate the Volume of solution required to dissolve a compound of known mass to a desired concentration
  • Calculate the Concentration of a solution resulting from a known mass of compound in a specific volume
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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