1. GPCR/G Protein
    Neuronal Signaling
    Immunology/Inflammation
    Metabolic Enzyme/Protease
    Anti-infection
  2. Histamine Receptor
    Endogenous Metabolite
    SARS-CoV
    Influenza Virus
  3. Ketotifen fumarate

Ketotifen fumarate  (Synonyms: HC 20511 fumarate)

Cat. No.: HY-B0157A Purity: 99.92%
COA Handling Instructions

Ketotifen (HC 20-511) fumarate is an orally active second-generation noncompetitive histamine 1 (H1) receptor blocker and mast cell stabilizer. Ketotifen fumarate can block 6-phosphogluconate dehydrogenase (PGD) in vitro. Ketotifen fumarate also has antiviral activity against SARS-CoV-2 and Influenza virus. Ketotifen fumarate can be used to the research of autoimmune encephalomyelitis (EAE) and asthma attack prevention.

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

Ketotifen fumarate Chemical Structure

Ketotifen fumarate Chemical Structure

CAS No. : 34580-14-8

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Solution
10 mM * 1 mL in DMSO USD 61 In-stock
Estimated Time of Arrival: December 31
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ready for reconstitution
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Estimated Time of Arrival: December 31
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Description

Ketotifen (HC 20-511) fumarate is an orally active second-generation noncompetitive histamine 1 (H1) receptor blocker and mast cell stabilizer. Ketotifen fumarate can block 6-phosphogluconate dehydrogenase (PGD) in vitro. Ketotifen fumarate also has antiviral activity against SARS-CoV-2 and Influenza virus. Ketotifen fumarate can be used to the research of autoimmune encephalomyelitis (EAE) and asthma attack prevention[1][2][3][4].

IC50 & Target

Histamine 1, SARS-CoV-2, Influenza virus[1][3][4]

In Vitro

Ketotifen (0-100 μM; 2 or 4 days) inhibits SARS-CoV-2 with an EC50 of 48.9 μM; and increases the percentage inhibition of SARS-CoV-2 to 79%, 83% and 93% when co-administers with 25, 50 and 100 μM Indomethacin, respectively[3].
Ketotifen (0-50 μM; 24 h) has inhibitory activity against PR8, pH1N1 and H3N2 with EC50s of 5.9 μM, 33.7 μM and 48.5 μM, respectively; and exhibits relatively low cytotoxicity in MDCK cells (EC50=291 μM)[4].

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

In Vivo

Ketotifen (80 mg/kg; i.g.; daily for 3 days) reduces end organ damage and mortality in mice infected with influenza virus[4].
Ketotifen fumarate (0.4 mg/kg; i.p.; daily for 10 days) reduces encephalomyelitis (EAE) prevalence and severity[5].

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

Animal Model: Female C57BL/6 mice (4-6 weeks; intranasal infection with 1×103 TCID50 of PR8 in 30 μL of DMEM)[4]
Dosage: 80 mg/kg
Administration: i.g.; daily for 3 days
Result: Reduced end organ damage and mortality in infected mice.
Animal Model: Female C57BL/6 mice (5-6 weeks old; subcutaneously immunized with 150 μg of MOG35-55 peptide containing 4 mg/mL of Mycobacterium tuberculosis)[5]
Dosage: 0.4 mg/kg
Administration: i.p.; daily for 10 days (from the 7th day of infection)
Result: Reduced EAE prevalence and severity; reduced oxidative stress status and inflammasome activation at the CNS; reduced the amount of T cells, especially Th1, in the CNS; downregulated local mRNA expression for mast cell enzymes and preserves blood-CNS barrier permeability; triggered lymphocyte accumulation in draining lymph nodes.
Clinical Trial
Molecular Weight

425.50

Formula

C23H23NO5S

CAS No.
SMILES

O=C(C1=C/2C=CS1)CC3=CC=CC=C3C2=C4CCN(C)CC/4.O=C(O)/C=C/C(O)=O

Shipping

Room temperature in continental US; may vary elsewhere.

Storage

4°C, sealed storage, away from moisture

*In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture)

Solvent & Solubility
In Vitro: 

DMSO : ≥ 100 mg/mL (235.02 mM)

H2O : 16.67 mg/mL (39.18 mM; Need ultrasonic)

*"≥" means soluble, but saturation unknown.

Preparing
Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 2.3502 mL 11.7509 mL 23.5018 mL
5 mM 0.4700 mL 2.3502 mL 4.7004 mL
10 mM 0.2350 mL 1.1751 mL 2.3502 mL
*Please refer to the solubility information to select the appropriate solvent.
In Vivo:
  • 1.

    Add each solvent one by one:  PBS

    Solubility: 37.5 mg/mL (88.13 mM); Clear solution; Need ultrasonic

  • 2.

    Add each solvent one by one:  10% DMSO    40% PEG300    5% Tween-80    45% saline

    Solubility: ≥ 2.5 mg/mL (5.88 mM); Clear solution

  • 3.

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

    Solubility: ≥ 2.5 mg/mL (5.88 mM); Clear solution

*All of the co-solvents are available by MCE.
Purity & Documentation
References
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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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Ketotifen fumarate
Cat. No.:
HY-B0157A
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