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Clemastine fumarate

Name: Clemastine fumarate
Brand: Selleck Chemicals
SKU: S1847
Rating: 5 (15 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: 14976-57-9

Selleck's Clemastine fumarate has been cited by 15 Publications

2 Customer Reviews

Purity & Quality Control

Batch: Purity: 99.99%

99.99

Clemastine fumarate Related Products

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Signaling Pathway

Histamine Receptor Signaling Pathway

Choose Selective Histamine Receptor Inhibitors

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 2024-01-11)
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	November 1 2023	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

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In vivo
Batch:

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In vivo Formulation Calculator

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In vivo Formulation Calculator (Clear solution)

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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.

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Handling Instructions

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