1. Cell Cycle/DNA Damage
    Anti-infection
  2. Antifolate
    Parasite
  3. Pyrimethamine

Pyrimethamine (Synonyms: Pirimecidan; Pirimetamin; RP 4753)

Cat. No.: HY-18062 Purity: 99.90%
Handling Instructions

Pyrimethamine(RP4753) is a medication used for protozoal infections; interferes with tetrahydrofolic acid synthesis from folic acid by inhibiting the enzyme dihydrofolate reductase (DHFR).

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

Pyrimethamine Chemical Structure

Pyrimethamine Chemical Structure

CAS No. : 58-14-0

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Free Sample (0.5-1 mg)   Apply now  
10 mM * 1 mL in DMSO USD 79 In-stock
Estimated Time of Arrival: December 31
100 mg USD 72 In-stock
Estimated Time of Arrival: December 31
500 mg USD 168 In-stock
Estimated Time of Arrival: December 31
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Based on 3 publication(s) in Google Scholar

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Description

Pyrimethamine(RP4753) is a medication used for protozoal infections; interferes with tetrahydrofolic acid synthesis from folic acid by inhibiting the enzyme dihydrofolate reductase (DHFR). IC50 Value: 15.4 nM (Plasmodium falciparum) [1] Target: DHFR; antifolate in vitro: Three susceptibility levels (susceptible, intermediate, and resistant) were observed in the response of culture-adapted clones and strains to pyrimethamine (50% inhibitory concentration [IC50]) < 100, 100-2,000, and > 2,000 nM) and cycloguanil (IC50 < 50, 50-500, and > 500 nM). Based on these susceptibility levels, 73 and 68 of 96 fresh clinical isolates were susceptible to pyrimethamine (mean IC50 15.4 nM) and cycloguanil (mean IC50 11.1 nM), respectively [1]. We tested pyrimethamine(previously reported to suppress SOD1 expression), several compounds currently in trials in human and murine ALS, and a set of 1040 FDA-approved compounds. In a PC12 cell-based assay, no compounds reduced SOD1 promoter activity without concomitant cytotoxicity. Additionally,pyrimethamine failed to repress levels of SOD1 protein in HeLa cells or homogenates of liver, spinal cord and brain of wild-type mice [3]. in vivo: (131)I-Pyrimethamine (specific activity: 7.08 MBq/ mol) was injected intravenously into the tail vein of the control and infected rats. Static whole body images of the rats were acquired under the gamma camera at 5 min, 45 min, 2 h, 6 h, and 24 h following the intravenous administration of the radioactivity (3.7 MBq/rat) [2]. The 10-day treatment with 10mg/kg/day of fluconazole combined with 40/1mg/kg/day sulfadiazine and pyrimethamine resulted in 93% survival of CF1 mice acutely infected with the highly virulent T. gondii RH strain, versus 36% of mice treated with just sulfadiazine and pyrimethamine [4]. Toxicity: Sulfadoxine/pyrimethamine is well tolerated as treatment and when used as intermittent preventive treatment in pregnant African women. Sulfadoxine/pyrimethamine is no longer used as prophylaxis because it may cause toxic epidermal necrolysis and Stevens Johnson syndrome [5].

Clinical Trial
Molecular Weight

248.71

Formula

C₁₂H₁₃ClN₄

CAS No.

58-14-0

SMILES

NC1=NC(N)=C(C2=CC=C(Cl)C=C2)C(CC)=N1

Shipping

Room temperature in continental US; may vary elsewhere

Storage
Powder -20°C 3 years
  4°C 2 years
In solvent -80°C 6 months
  -20°C 1 month
Solvent & Solubility
In Vitro: 

DMSO : 25 mg/mL (100.52 mM; Need ultrasonic)

Preparing
Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 4.0207 mL 20.1037 mL 40.2075 mL
5 mM 0.8041 mL 4.0207 mL 8.0415 mL
10 mM 0.4021 mL 2.0104 mL 4.0207 mL
*Please refer to the solubility information to select the appropriate solvent.
In Vivo:
  • 1.

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

    Solubility: ≥ 2.5 mg/mL (10.05 mM); Clear solution

  • 2.

    Add each solvent one by one:  10% DMSO    90% corn oil

    Solubility: ≥ 2.5 mg/mL (10.05 mM); Clear solution

*All of the co-solvents are provided by MCE.
References
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Product Name:
Pyrimethamine
Cat. No.:
HY-18062
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