Losmapimod (GW856553X)
For research use only.
Catalog No.S7215 Synonyms: GW856553, GSK-AHAB
10 publications

CAS No. 585543-15-3
Losmapimod (GW856553X, GW856553, GSK-AHAB) is a selective, potent, and orally active p38 MAPK inhibitor with pKi of 8.1 and 7.6 for p38α and p38β, respectively. P38 MAPKs are involved in cell differentiation, apoptosis and autophagy. Phase 3.
Purity & Quality Control
Choose Selective p38 MAPK Inhibitors
Biological Activity
Description | Losmapimod (GW856553X, GW856553, GSK-AHAB) is a selective, potent, and orally active p38 MAPK inhibitor with pKi of 8.1 and 7.6 for p38α and p38β, respectively. P38 MAPKs are involved in cell differentiation, apoptosis and autophagy. Phase 3. | ||||||||||||||||
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Targets |
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Cell Data |
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In vivo | In spontaneously hypertensive stroke-prone rats (SHR-SP), Losmapimod significantly improves survival, endothelial-dependent and -independent vascular relaxation, and indices of renal function, and subsequently attenuates dyslipidemia, hypertension, cardiac remodeling, plasma renin activity (PRA), aldosterone, and interleukin-1beta (IL-1beta). [1] |
Protocol
Animal Research: |
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Solubility (25°C)
In vitro | DMSO | 76 mg/mL (198.19 mM) |
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Water | Insoluble | |
Ethanol | '41 mg/mL warmed |
* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.
Chemical Information
Molecular Weight | 383.46 |
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Formula | C22 H26 F N3 O2 |
CAS No. | 585543-15-3 |
Storage |
powder in solvent |
Synonyms | GW856553, GSK-AHAB |
Smiles | CC1=C(C=C(C=C1F)C(=O)NC2CC2)C3=NC=C(C=C3)C(=O)NCC(C)(C)C |
In vivo Formulation Calculator (Clear solution)
Step 1: Enter information below (Recommended: An additional animal making an allowance for loss during the experiment) | ||||||||||
Dosage | mg/kg | Average weight of animals | g | Dosing volume per animal | ul | Number of animals | ||||
Step 2: Enter the in vivo formulation () | ||||||||||
% DMSO % % Tween 80 % ddH2O | ||||||||||
CalculateReset |
Calculation results:
Working concentration: mg/ml;
Method for preparing DMSO master liquid: : mg drug pre-dissolved in μL DMSO (Master liquid concentration mg/mL,)
Method for preparing in vivo formulation:Take μL DMSO master liquid, next addμL PEG300, mix and clarify, next addμL Tween 80,mix and clarify, next add μL ddH2O,mix and clarify.
1.Please make sure the liquid is clear before adding the next solvent.
2.Be sure to add the solvent(s) in order. You must ensure that the solution obtained, in the previous addition, is a clear solution before proceeding to add the next solvent. Physical methods such as vortex, ultrasound or hot water bath can be used to aid dissolving.
Bio Calculators
Molarity Calculator
Calculate the mass, volume or concentration required for a solution. The Selleck molarity calculator is based on the following equation:
Mass (mg) = Concentration (mM) × Volume (mL) × Molecular Weight (g/mol)
*When preparing stock solutions, please always use the batch-specific molecular weight of the product found on the via label and MSDS / COA (available on product pages).
Dilution Calculator
Calculate the dilution required to prepare a stock solution. The Selleck dilution calculator is based on the following equation:
Concentration (start) x Volume (start) = Concentration (final) x Volume (final)
This equation is commonly abbreviated as: C1V1 = C2V2 ( Input Output )
* When preparing stock solutions always use the batch-specific molecular weight of the product found on the vial label and MSDS / COA (available online).
Molecular Weight Calculator
Enter the chemical formula of a compound to calculate its molar mass and elemental composition:
Tip: Chemical formula is case sensitive. C10H16N2O2 c10h16n2o2
Instructions to calculate molar mass (molecular weight) of a chemical compound:
To calculate molar mass of a chemical compound, please enter its chemical formula and click 'Calculate'.
Definitions of molecular mass, molecular weight, molar mass and molar weight:
Molecular mass (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.
Molarity Calculator
Clinical Trial Information
NCT Number | Recruitment | interventions | Conditions | Sponsor/Collaborators | Start Date | Phases |
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NCT04264442 | Enrolling by invitation | Drug: Losmapimod | Facioscapulohumeral Muscular Dystrophy (FSHD) | Fulcrum Therapeutics | February 13 2020 | Phase 2 |
NCT04004000 | Active not recruiting | Drug: Losmapimod | Facioscapulohumeral Muscular Dystrophy 1 | Fulcrum Therapeutics | August 23 2019 | Phase 2 |
NCT04003974 | Active not recruiting | Drug: Losmapimod|Drug: Placebo oral tablet | Facioscapulohumeral Muscular Dystrophy (FSHD) | Fulcrum Therapeutics | August 9 2019 | Phase 2 |
NCT02000440 | Completed | Drug: Losmapimod | Glomerulosclerosis Focal Segmental | GlaxoSmithKline | July 1 2014 | Phase 2 |
Tech Support
Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.
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