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Etomoxir  (Synonyms: (R)-(+)-Etomoxir)

Cat. No.: HY-50202 Purity: 99.92%
COA Handling Instructions

Etomoxir ((R)-(+)-Etomoxir) is an irreversible inhibitor of carnitine palmitoyltransferase 1a (CPT-1a), inhibits fatty acid oxidation (FAO) through CPT-1a and inhibits palmitate β-oxidation in human, rat and guinea pig.

For research use only. We do not sell to patients.

Etomoxir Chemical Structure

Etomoxir Chemical Structure

CAS No. : 124083-20-1

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Customer Review

Based on 64 publication(s) in Google Scholar

Other Forms of Etomoxir:

Top Publications Citing Use of Products

62 Publications Citing Use of MCE Etomoxir

WB
Proliferation Assay

    Etomoxir purchased from MedChemExpress. Usage Cited in: Cell Death Dis. 2023 Feb 15;14(2):125.  [Abstract]

    Etomoxir reduces the proliferation of 143b cells.

    Etomoxir purchased from MedChemExpress. Usage Cited in: Oncotarget. 2016 Oct 11;7(41):67071-67086.  [Abstract]

    MDA-MB-453 cells are treated as indicated for 2 days and subjected to immunoblotting. Combination treatments using non-saturating doses of Etomoxir and MTI-31 or Rapamycin results in an enhanced growth suppression in MDA-MB-453 cells, which is not readily observed in MDA-MB-231 cells, correlating a nearly complete suppression of cyclin D1 and c-Myc level in MDA-MB-453 cells under the combination treatments.
    • Biological Activity

    • Protocol

    • Purity & Documentation

    • References

    • Customer Review

    Description

    Etomoxir ((R)-(+)-Etomoxir) is an irreversible inhibitor of carnitine palmitoyltransferase 1a (CPT-1a), inhibits fatty acid oxidation (FAO) through CPT-1a and inhibits palmitate β-oxidation in human, rat and guinea pig.

    IC50 & Target

    CPT-1a[5]

    In Vitro

    Etomoxir binds irreversibly to the catalytic site of CPT-1 inhibiting its activity, but also upregulates fatty acid oxidation enzymes. Etomoxir is developed as an inhibitor of the mitochondrial carnitine palmitoyltransferase-1 (CPT-1) located on the outer mitochondrial membrane. Etomoxir, in the liver can act as peroxisomal proliferator, increasing DNA synthesis and liver growth. Thus, etomoxir, in addition of being a CPT1 inhibitor could be considered as a PPARalpha agonist[1]. Etomoxir is a member of the oxirane carboxylic acid carnitine palmitoyl transferase I inhibitors and has been suggested as a therapeutic agent for the treatment of heart failure. Acute Etomoxir treatment irreversibly inhibits the activity of carnitine palmitoyltransferase I. As a result, fatty acid import into the mitochondria and β-oxidation is reduced, whereas cytosolic fatty acid accumulates and glucose oxidation is elevated. Prolonged incubation (24 h) with Etomoxir produces diverse effects on the expression of several metabolic enzyme[2].

    MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

    In Vivo

    Etomoxir is an inhibitor of free fatty acid (FFA) oxidation-related key enzyme CPT1. P53 interacts directly with Bax, which is inhibited by Etomoxir, further confirming the direct interaction of P53 and Bax, and the involvement of FAO-mediated mitochondrial ROS generation in db/db mice[3]. Rats are injected daily with Etomoxir, a specific CPT-I inhibitor, for 8 days at 20 mg/kg of body mass. Etomoxir-treated rats display a 44% reduced cardiac CPT-I activity. The treatment of Lewis rats for 8 days with 20 mg/kg Etomoxir does not alter blood glucose, which is in line with comparable etomoxir-feeding studies. Similarly, Etomoxir feeding does not affect general growth characteristics such as gain in body mass, nor does it affect hindlimb muscle mass. However, heart mass and liver mass are both significantly increased by 11% in Etomoxir-treated rats[4].

    MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

    Molecular Weight

    326.82

    Formula

    C17H23ClO4

    CAS No.
    Appearance

    <32°C Solid,>34°C Liquid

    Color

    Colorless to light yellow

    SMILES

    O=C(OCC)[C@@]1(OC1)CCCCCCOC2=CC=C(C=C2)Cl

    Shipping

    Room temperature in continental US; may vary elsewhere.

    Storage

    -20°C, protect from light, stored under nitrogen

    *In solvent : -80°C, 6 months; -20°C, 1 month (protect from light, stored under nitrogen)

    Solvent & Solubility
    In Vitro: 

    DMSO : 100 mg/mL (305.98 mM; ultrasonic and warming and heat to 60°C; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)

    Preparing
    Stock Solutions
    Concentration Solvent Mass 1 mg 5 mg 10 mg
    1 mM 3.0598 mL 15.2989 mL 30.5979 mL
    5 mM 0.6120 mL 3.0598 mL 6.1196 mL
    View the Complete Stock Solution Preparation Table

    * Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
    Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (protect from light, stored under nitrogen). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

    • Molarity Calculator

    • Dilution Calculator

    Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)

    Mass
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    Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

    This equation is commonly abbreviated as: C1V1 = C2V2

    Concentration (start)

    C1

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    Volume (start)

    V1

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    Concentration (final)

    C2

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    V2

    In Vivo:

    Select the appropriate dissolution method based on your experimental animal and administration route.

    For the following dissolution methods, please ensure to first prepare a clear stock solution using an In Vitro approach and then sequentially add co-solvents:
    To ensure reliable experimental results, the clarified stock solution can be appropriately stored based on storage conditions. As for the working solution for in vivo experiments, it is recommended to prepare freshly and use it on the same day.
    The percentages shown for the solvents indicate their volumetric ratio in the final prepared solution. If precipitation or phase separation occurs during preparation, heat and/or sonication can be used to aid dissolution.

    • Protocol 1

      Add each solvent one by one:  10% DMSO    90% (20% SBE-β-CD in Saline)

      Solubility: 3.5 mg/mL (10.71 mM); Suspended solution; Need ultrasonic

      This protocol yields a suspended solution of 3.5 mg/mL. Suspended solution can be used for oral and intraperitoneal injection.

      Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (35.0 mg/mL) to 900 μL 20% SBE-β-CD in Saline, and mix evenly.

      Preparation of 20% SBE-β-CD in Saline (4°C, storage for one week): 2 g SBE-β-CD powder is dissolved in 10 mL Saline, completely dissolve until clear.
    • Protocol 2

      Add each solvent one by one:  10% DMSO    90% Corn Oil

      Solubility: ≥ 3.5 mg/mL (10.71 mM); Clear solution

      This protocol yields a clear solution of ≥ 3.5 mg/mL (saturation unknown). If the continuous dosing period exceeds half a month, please choose this protocol carefully.

      Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (35.0 mg/mL) to 900 μL Corn oil, and mix evenly.

    For the following dissolution methods, please prepare the working solution directly. It is recommended to prepare fresh solutions and use them promptly within a short period of time.
    The percentages shown for the solvents indicate their volumetric ratio in the final prepared solution. If precipitation or phase separation occurs during preparation, heat and/or sonication can be used to aid dissolution.

    • Protocol 1

      Add each solvent one by one:  0.5% Methylcellulose/saline water

      Solubility: 10 mg/mL (30.60 mM); Suspended solution; Need ultrasonic

    In Vivo Dissolution Calculator
    Please enter the basic information of animal experiments:

    Dosage

    mg/kg

    Animal weight
    (per animal)

    g

    Dosing volume
    (per animal)

    μL

    Number of animals

    Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.
    Please enter your animal formula composition:
    %
    DMSO +
    +
    %
    Tween-80 +
    %
    Saline
    Recommended: Keep the proportion of DMSO in working solution below 2% if your animal is weak.
    The co-solvents required include: DMSO, . All of co-solvents are available by MedChemExpress (MCE). , Tween 80. All of co-solvents are available by MedChemExpress (MCE).
    Calculation results:
    Working solution concentration: mg/mL
    Method for preparing stock solution: mg drug dissolved in μL  DMSO (Stock solution concentration: mg/mL).

    *In solvent : -80°C, 6 months; -20°C, 1 month (protect from light, stored under nitrogen)

    The concentration of the stock solution you require exceeds the measured solubility. The following solution is for reference only. If necessary, please contact MedChemExpress (MCE).
    Method for preparing in vivo working solution for animal experiments: Take μL DMSO stock solution, add μL . μL , mix evenly, next add μL Tween 80, mix evenly, then add μL Saline.
     If the continuous dosing period exceeds half a month, please choose this protocol carefully.
    Please ensure that the stock solution in the first step is dissolved to a clear state, and add co-solvents in sequence. You can use ultrasonic heating (ultrasonic cleaner, recommended frequency 20-40 kHz), vortexing, etc. to assist dissolution.
    Purity & Documentation

    Purity: 99.92%

    References
    Cell Assay
    [2]

    Rat heart H9c2 myoblastic cells are incubated in DMEM containing 10% fetal bovine serum until near confluence. In some experiments, cells are preincubated for 2 h with DMEM (serum-free) in the absence or presence of 1-80 μM Etomoxir and then incubated for 2 h with 0.1 mM [1-14C]oleic acid (10 μCi/dish, binds to BSA in a 1:1 molar ratio). In other experiments, cells are preincubated for 2 h plus or minus 40 μM Etomoxir and then incubated for 2 h with 0.1 μM or 0.1 mM [1,3-3H]glycerol (10 μCi/dish), 0.1 mM [1-14C]oleic acid (2 μCi/dish, binds to BSA in a 1:1 molar ratio), 0.1 mM [1-14C]palmitic acid (2 μCi/dish, binds to BSA in a 1:1 molar ratio), 28 μM [methyl-3H]choline (2 μCi/dish), 0.4 mM [3H]serine (20 μCi/dish), or 40 μM myo-[3H]inositol (10 μCi/dish). The medium is removed and the cells washed twice with ice-cold saline and then harvested from the dish with 2 mL methanol-water (1:1, v/v) for lipid extraction. An aliquot of the homogenate is taken for the determination of total uptake of radioactivity into cells. Phospholipids are then isolated and radioactivity in these determined[2].

    MCE has not independently confirmed the accuracy of these methods. They are for reference only.

    Animal Administration
    [3][4]

    Mice[3]
    80 male C57BLKS/J lar-Leprdb/db mice and 20 wild type littermates (8 week) are used. db/db mice are randomly divided into four groups: db/db group, Etomoxir group, MitoQ group, and PFT-α group. In the Etomoxir group, mice are intraperitoneally injected with 1 mg/kg Etomoxir twice every week. In the MitoQ group, 50 μM MitoQ is given to the mice in water. Water bottles, containing either MitoQ, are covered with aluminum foil, and all bottles are refilled every 3 days. In the PFT-α group, mice are intraperitoneally injected with 1 mg/kg PFT-α twice every week. WT mice are administrated with vehicle instead. The experimental period is 8 weeks. At the end, peripheral blood samples and bone marrow cells are harvested for the assays.
    Rats[4]
    Male Lewis rats, weighing 150-200 g, are used in the present study. Animals are kept on a 12 h:12 h light/dark cycle and fed a Purina Chow diet and water ad libitum. The rats are divided into two groups: (1) control and (2) Etomoxir. Etomoxir (20 mg/kg of body weight) is dissolved in 0.9% (w/v) NaCl and administered intraperitoneally for 8 days. Control rats receive saline. The last injection is given 24 h before the experiment.

    MCE has not independently confirmed the accuracy of these methods. They are for reference only.

    References

    Complete Stock Solution Preparation Table

    * Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
    Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month (protect from light, stored under nitrogen). When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

    Optional Solvent Concentration Solvent Mass 1 mg 5 mg 10 mg 25 mg
    DMSO 1 mM 3.0598 mL 15.2989 mL 30.5979 mL 76.4947 mL
    5 mM 0.6120 mL 3.0598 mL 6.1196 mL 15.2989 mL
    10 mM 0.3060 mL 1.5299 mL 3.0598 mL 7.6495 mL
    15 mM 0.2040 mL 1.0199 mL 2.0399 mL 5.0996 mL
    20 mM 0.1530 mL 0.7649 mL 1.5299 mL 3.8247 mL
    25 mM 0.1224 mL 0.6120 mL 1.2239 mL 3.0598 mL
    30 mM 0.1020 mL 0.5100 mL 1.0199 mL 2.5498 mL
    40 mM 0.0765 mL 0.3825 mL 0.7649 mL 1.9124 mL
    50 mM 0.0612 mL 0.3060 mL 0.6120 mL 1.5299 mL
    60 mM 0.0510 mL 0.2550 mL 0.5100 mL 1.2749 mL
    80 mM 0.0382 mL 0.1912 mL 0.3825 mL 0.9562 mL
    100 mM 0.0306 mL 0.1530 mL 0.3060 mL 0.7649 mL
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      Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

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