1. MAPK/ERK Pathway Apoptosis
  2. Ribosomal S6 Kinase (RSK) Apoptosis
  3. LJH685

LJH685 is a potent, ATP-competitive and selective RSK inhibitor, inhibits RSK1, 2, and 3 biochemical activities with IC50s of 6, 5, 4 nM, respectively.

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

LJH685 Chemical Structure

LJH685 Chemical Structure

CAS No. : 1627710-50-2

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Solid + Solvent
10 mM * 1 mL in DMSO
ready for reconstitution
USD 110 In-stock
Solution
10 mM * 1 mL in DMSO USD 110 In-stock
Solid
5 mg USD 100 In-stock
10 mg USD 160 In-stock
50 mg USD 512 In-stock
100 mg USD 768 In-stock
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500 mg   Get quote  

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Description

LJH685 is a potent, ATP-competitive and selective RSK inhibitor, inhibits RSK1, 2, and 3 biochemical activities with IC50s of 6, 5, 4 nM, respectively[1].

IC50 & Target

IC50: 6 nM (RSK1), 5 nM (RSK1), 4 nM (RSK1)[1]

In Vitro

LJH685 (0.01-100 μM; 72 hours) efficiently inhibits the growth of MDA-MB-231 and H358 cells in soft agar with EC50s of 0.73 and 0.79 μM, respectively[1].
LJH685 (0.1-10 μM; 4 hours) efficiently reduces phosphorylation of YB1 at submicromolar concentrations and causes nearly complete inhibition at higher concentrations[1].

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

Cell Proliferation Assay[1]

Cell Line: MDA-MB-231, H358 cells
Concentration: 0.01, 0.1, 1, 10, 100 μM
Incubation Time: 72 hours
Result: The growth in soft agar was efficiently inhibited with EC50 values of 0.73 and 0.79 μM in MDA-MB-231 and H358, respectively.

Western Blot Analysis[1]

Cell Line: MDA-MB-231, H358 cells
Concentration: 0.1, 0.3, 1, 3, 10 μM
Incubation Time: 4 hours
Result: Efficiently reduced phosphorylation of YB1 at submicromolar concentrations and caused nearly complete inhibition at higher concentrations.
Molecular Weight

381.42

Formula

C22H21F2N3O

CAS No.
Appearance

Solid

Color

White to off-white

SMILES

OC1=C(F)C=C(C2=C(C3=CC=C(N4CCN(C)CC4)C=C3)C=CN=C2)C=C1F

Shipping

Room temperature in continental US; may vary elsewhere.

Storage
Powder -20°C 3 years
4°C 2 years
In solvent -80°C 2 years
-20°C 1 year
Solvent & Solubility
In Vitro: 

DMSO : ≥ 31 mg/mL (81.28 mM; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)

*"≥" means soluble, but saturation unknown.

Preparing
Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 2.6218 mL 13.1089 mL 26.2178 mL
5 mM 0.5244 mL 2.6218 mL 5.2436 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, 2 years; -20°C, 1 year. When stored at -80°C, please use it within 2 years. When stored at -20°C, please use it within 1 year.

  • 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: ≥ 1 mg/mL (2.62 mM); Clear solution

    This protocol yields a clear solution of ≥ 1 mg/mL (saturation unknown).

    Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (10.0 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: ≥ 1 mg/mL (2.62 mM); Clear solution

    This protocol yields a clear solution of ≥ 1 mg/mL (saturation unknown).

    Taking 1 mL working solution as an example, add 100 μL DMSO stock solution (10.0 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.
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 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
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, 2 years; -20°C, 1 year. When stored at -80°C, please use it within 2 years. When stored at -20°C, please use it within 1 year.

Optional Solvent Concentration Solvent Mass 1 mg 5 mg 10 mg 25 mg
DMSO 1 mM 2.6218 mL 13.1089 mL 26.2178 mL 65.5445 mL
5 mM 0.5244 mL 2.6218 mL 5.2436 mL 13.1089 mL
10 mM 0.2622 mL 1.3109 mL 2.6218 mL 6.5545 mL
15 mM 0.1748 mL 0.8739 mL 1.7479 mL 4.3696 mL
20 mM 0.1311 mL 0.6554 mL 1.3109 mL 3.2772 mL
25 mM 0.1049 mL 0.5244 mL 1.0487 mL 2.6218 mL
30 mM 0.0874 mL 0.4370 mL 0.8739 mL 2.1848 mL
40 mM 0.0655 mL 0.3277 mL 0.6554 mL 1.6386 mL
50 mM 0.0524 mL 0.2622 mL 0.5244 mL 1.3109 mL
60 mM 0.0437 mL 0.2185 mL 0.4370 mL 1.0924 mL
80 mM 0.0328 mL 0.1639 mL 0.3277 mL 0.8193 mL
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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.

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Product Name:
LJH685
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HY-19712
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