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Clemastine fumarate

Name: Clemastine fumarate
Brand: Selleck Chemicals
SKU: S1847
Rating: 5 (22 reviews)

Synonyms: HS-592 fumarate, Meclastine fumarate

Catalog No.S1847 Purity:99.99%

Clemastine fumarate is a selective histamine H1 receptor antagonist with IC50 of 3 nM. Clemastine stimulates autophagy via mTOR pathway.

Clemastine fumarate Chemical Structure

CAS No. 14976-57-9

Purity & Quality Control

Batch: Purity: 99.99%

99.99

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Signaling Pathway

Histamine Receptor Signaling Pathway

Biological Activity

Description

Clemastine fumarate is a selective histamine H1 receptor antagonist with IC50 of 3 nM. Clemastine stimulates autophagy via mTOR pathway.

Targets

mTOR ^[7]	Histamine H1 receptor ^[1]
	3 nM

In vitro
In vitro	Clemastine Fumarate inhibits histamine induced rise in [Ca²⁺]_i in HL-60 cells with an IC50 of 3 nM as compared with that of chlorpheniramine or diphenhydramine with IC50 values of 20 nM and 100 nM, respectively. ^[1] At concentrations of ≥25 μM, Clemastine Fumarate significantly blocks NK and ADCC reactions of lymphocytes against the human erythroleukemia cell line K562 and human B-lymphoblast cell line SB, respectively. ^[2] Clemastine Fumarate inhibits histamine-induced contraction of guinea pig ileum with an IC50 of 231 nM. ^[3] Clemastine Fumarate potently inhibits the HERG K⁺ channel in a concentration-dependent manner in HEK 293 cells stably expressing HERG channels with an IC50 of 12 nM, which can be attenuated by the Y652A or F656A mutation of HERG. ^[4] Clemastine Fumarate significantly potentiates ATP-induced increase in [Ca²⁺]_i in HEKhP2X7 cells not relying on histamine receptor blockage but on sensitizing P2X7 receptor in a concentration-dependent manner with an EC50 of 10 μM, and increases the IL-1β release from LPS-induced human macrophages. ^[5]
Kinase Assay	Inhibition of [Ca²⁺]_i
Kinase Assay	HL-60 cells are suspended at 1×10⁷ cells/mL in a buffer consisting of 138 mM NaCl, 6 mM KC1, 1 mM MgSO4, 1 mM Na₂HPO₄, 5 mM NaHCO₃, 5.5 mM glucose, and 20 mM HEPES-NaOH, pH 7.4, supplemented with 0.1% (w/v) bovine serum albumin. The dye fura-2/AM is added at a concentration of 4 μM, and cells are incubated for 10 minutes at 37 °C. Thereafter, cells are diluted with the aforementioned buffer to a concentration of 5×10⁶ cells/mL and incubated for 45 minutes at 37 °C. Subsequently, cells are diluted with the aforementioned buffer to a final concentration of 0.5 × 10⁶ cells/mL and centrifuged at 250 g for 10 minutes at 20 °C. Cells are suspended at 1.0 × 10⁶ cells/mL in the aforementioned buffer and kept at 20 °C until measurement. HL-60 cells are used for up to 4 hours after loading with fura-2/AM, and suspended in 2 mL of the aforementioned buffer, using acryl fluorescence cuvettes. HL-60 cells are incubated for 3 minutes at 37 °C, in the presence of 1 mM Ca²⁺ and various concentrations of Clemastine Fumarate, before the addition of histamine (100 μM). Fluorescence is determined at 37 °C, with constant stirring of the cells at 1×10³ rpm, using a Ratio II spectrofluorometer. The basal fluorescence (basal [Ca²⁺]_i) is measured for 1 minute. The basal [Ca²⁺]_i values are subtracted from the corresponding peak [Ca²⁺]_i values, to calculate the increase in [Ca²⁺]_i. The excitation and emission wavelengths are 340 and 500 nm, respectively. The IC50 value is assessed from competitive curve.

In Vivo
In vivo	Administration of Clemastine Fumarate (5-20 mg/kg) displays significantly inhibitory effect on simultaneously induced zymosan paw oedema and croton oil ear oedema in rats in a dose-dependent manner, with the inhibition of 53.6% and 46.8%, respectively, at the dose of 20 mg/kg, and with ID50 values of 18.0 mg/kg and 20.5 mg/kg, respectively. ^[6] Clemastine Fumarate treatment strongly reduces innate immune responses to Listeria monocytogenes in mice by interfering with the extracellular signal-regulated kinase (ERK)-mediated production of proinflammatory cytokines such as TNF-α and IL-6 surprisingly not dependent on blocking the histamine H1 receptor, leading to significantly higher mortality. ^[7]
Animal Research	Animal Models	Male Wistar rats with paw oedema induced by subplantar injection of zymosan and ear oedema induced by croton oil
	Dosages	5-20 mg/kg
	Administration	Intraperitoneally

NCT Number	Recruitment	Conditions	Sponsor/Collaborators	Start Date	Phases
Clinical Trial Information (data from https://clinicaltrials.gov, updated on 2024-05-22)
NCT06065670	Not yet recruiting	Demyelinating Diseases\|Demyelination; Corpus Callosum\|Multiple Sclerosis Brain Lesion\|Multiple Sclerosis Acute and Progressive\|Clinically Isolated Syndrome CNS Demyelinating	University of California San Francisco	March 1 2024	Phase 1\|Phase 2
NCT05359653	Recruiting	Multiple Sclerosis (MS)\|Multiple Sclerosis Relapsing-Remitting\|Multiple Sclerosis Primary Progressive\|Multiple Sclerosis Chronic Progressive\|Multiple Sclerosis Relapse\|Multiple Sclerosis Brain Lesion\|Multiple Sclerosis Benign	University of California San Francisco\|United States Department of Defense	August 1 2023	Phase 1\|Phase 2
NCT05131828	Recruiting	Multiple Sclerosis	Cambridge University Hospitals NHS Foundation Trust\|University of Cambridge	March 8 2022	Phase 2
NCT02040298	Completed	Multiple Sclerosis Relapsing-Remitting	University of California San Francisco	January 2014	Phase 2
NCT01239719	Unknown status	Allergy\|Dermatitis	Azidus Brasil	March 2011	Phase 3

References

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Chemical Information & Solubility

Molecular Weight	459.96	Formula	C₂₁H₂₆ClNO.C₄H₄O₄
CAS No.	14976-57-9	SDF	Download Clemastine fumarate SDF
Smiles	CC(C1=CC=CC=C1)(C2=CC=C(C=C2)Cl)OCCC3CCCN3C.C(=CC(=O)O)C(=O)O
Storage (From the date of receipt)	3 years-20°Cpowder	Storage of Stock Solutions Aliquot the stock solutions to avoid repeated freeze-thaw cycles	1 year-80°Cin solvent
Storage (From the date of receipt)	3 years-20°Cpowder		1 month-20°Cin solvent

In vitro
Batch:

DMSO : 11 mg/mL ( (23.91 mM) Moisture-absorbing DMSO reduces solubility. Please use fresh DMSO.)

Water : Insoluble

Ethanol : Insoluble

Molecular Weight Calculator

In vivo Batch: Add solvents to the product individually and in order.				In vivo Formulation Calculator
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Clear solution	5%DMSO 1 40%PEG300 2 5%Tween80 3 50%ddH2O Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	2.500mg/ml (5.44mM)	Taking the 1 mL working solution as an example, add 50 μL of 50 mg/ml clarified DMSO stock solution to 400 μL of PEG300, mix evenly to clarify it; add 50 μL of Tween80 to the above system, mix evenly to clarify; then continue to add 500 μL of ddH2O to adjust the volume to 1 mL. The mixed solution should be used immediately for optimal results.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.

Preparing Stock Solutions

Molarity Calculator

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Dilution Calculator Molecular Weight Calculator

In vivo Formulation Calculator (Clear solution)

Step 1: Enter information below (Recommended: An additional animal making an allowance for loss during the experiment)

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Method for preparing DMSO master liquid: mg drug pre-dissolved in μL DMSO ( Master liquid 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 master liquid, next addμL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH₂O, mix and clarify.

Method for preparing in vivo formulation: Take μL DMSO master liquid, next add μL Corn oil, mix and clarify.

Note: 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.

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.

Handling Instructions

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