2. MAPK/ERK Pathway NF-κB Metabolic Enzyme/Protease
  3. Ribosomal S6 Kinase (RSK) Keap1-Nrf2 Endogenous Metabolite
  4. Carnosol

Carnosol is a potent Ribosomal S6 Kinase (RSK2) inhibitor that could be useful for treating gastric cancer, with an IC50 of ~5.5 μM. Carnosol, a Nrf2 activator, increases the nuclear levels of Nrf2 and can promote the expression of heme oxygenase 1 (HMOX1).

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

Carnosol Chemical Structure

Carnosol Chemical Structure

CAS No. : 5957-80-2

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Customer Review

Based on 8 publication(s) in Google Scholar

Carnosol Related Antibodies

Top Publications Citing Use of Products

View All Ribosomal S6 Kinase (RSK) Isoform Specific Products:

View All Isoforms
p70S6K RSK1 RSK2 RSK3 RSK4

  • Biological Activity

  • Protocol

  • Purity & Documentation

  • References

  • Customer Review

Description

Carnosol is a potent Ribosomal S6 Kinase (RSK2) inhibitor that could be useful for treating gastric cancer, with an IC50 of ~5.5 μM[1]. Carnosol, a Nrf2 activator, increases the nuclear levels of Nrf2 and can promote the expression of heme oxygenase 1 (HMOX1)[2][3].

IC50 & Target[1][2]

RSK2

~5.5 μM (IC50)

Nrf2

 

In Vitro

It is showed that carnosol has no cytotoxic effects on GES1 cells and 10 μM carnosol strongly suppresses RSK2 activity, but has little effect on any other kinase. Carnosol exerts strong dose-dependent inhibitory effects against RSK2 autophosphorylation and phosphorylation of its substrate ATF1[1].

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

Carnosol Related Antibodies
In Vivo

Results indicate that Carnosol significantly decreaseS the volume and weight of gastric tumors relative to the vehicle-treated group. Additionally, mice tolerate treatment with carnosol without significant loss of body weight similar to the vehicle-treated group. The phosphorylation of CREB, a direct downstream protein of RSK2, Is strongly inhibited in the carnosol-treated group but the expression of total CREB is relatively unchanged[1].

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

330.42

Formula

C20H26O4
CAS No.
Appearance

Solid

Color

White to off-white

SMILES

O=C1O[C@]2([H])C3=C(C(O)=C(O)C(C(C)C)=C3)[C@@]41CCCC(C)(C)[C@]4([H])C2
Structure Classification
Initial Source
Shipping

Room temperature in continental US; may vary elsewhere.
Storage
Powder -20°C 3 years

*The compound is unstable in solutions, freshly prepared is recommended.

Solvent & Solubility
In Vitro: 

DMSO : 50 mg/mL (151.32 mM; Need ultrasonic; 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 3.0265 mL 15.1323 mL 30.2645 mL
5 mM 0.6053 mL 3.0265 mL 6.0529 mL
View the Complete Stock Solution Preparation Table

* Please refer to the solubility information to select the appropriate solvent. The compound is unstable in solutions, freshly prepared is recommended.

  • Molarity Calculator

  • Dilution Calculator

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

Mass
=
Concentration
×
Volume
×
Molecular Weight *

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

This equation is commonly abbreviated as: C1V1 = C2V2

Concentration (start)

C1

×
Volume (start)

V1

=
Concentration (final)

C2

×
Volume (final)

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    40% PEG300    5% Tween-80    45% Saline

    Solubility: ≥ 2.08 mg/mL (6.30 mM); Clear solution

    This protocol yields a clear solution of ≥ 2.08 mg/mL (saturation unknown).

    Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (20.8 mg/mL) to 400 μL PEG300, and mix evenly; then add 50 μL Tween-80 and mix evenly; then add 450 μL Saline to adjust the volume to 1 mL.

    Preparation of Saline: Dissolve 0.9 g sodium chloride in ddH₂O and dilute to 100 mL to obtain a clear Saline solution.
  • Protocol 2

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

    Solubility: ≥ 2.08 mg/mL (6.30 mM); Clear solution

    This protocol yields a clear solution of ≥ 2.08 mg/mL (saturation unknown).

    Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (20.8 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.
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).

*The compound is unstable in solutions, freshly prepared is recommended.

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: 99.90%

COA (253 KB) HNMR (205 KB) LCMS (121 KB)

Handling Instructions (2659 KB)
References

Complete Stock Solution Preparation Table

* Please refer to the solubility information to select the appropriate solvent. The compound is unstable in solutions, freshly prepared is recommended.

Optional Solvent Concentration Solvent Mass 1 mg 5 mg 10 mg 25 mg
DMSO 1 mM 3.0265 mL 15.1323 mL 30.2645 mL 75.6613 mL
5 mM 0.6053 mL 3.0265 mL 6.0529 mL 15.1323 mL
10 mM 0.3026 mL 1.5132 mL 3.0265 mL 7.5661 mL
15 mM 0.2018 mL 1.0088 mL 2.0176 mL 5.0441 mL
20 mM 0.1513 mL 0.7566 mL 1.5132 mL 3.7831 mL
25 mM 0.1211 mL 0.6053 mL 1.2106 mL 3.0265 mL
30 mM 0.1009 mL 0.5044 mL 1.0088 mL 2.5220 mL
40 mM 0.0757 mL 0.3783 mL 0.7566 mL 1.8915 mL
50 mM 0.0605 mL 0.3026 mL 0.6053 mL 1.5132 mL
60 mM 0.0504 mL 0.2522 mL 0.5044 mL 1.2610 mL
80 mM 0.0378 mL 0.1892 mL 0.3783 mL 0.9458 mL
100 mM 0.0303 mL 0.1513 mL 0.3026 mL 0.7566 mL
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Carnosol Related Classifications

Help & FAQs
  • Do most proteins show cross-species activity?

    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.

Keywords:

Carnosol5957-80-2Ribosomal S6 Kinase (RSK)Keap1-Nrf2Endogenous MetaboliteS6KInhibitorinhibitorinhibit

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