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Trimethoprim 

Cat. No.: HY-B0510 Purity: 99.98%
COA Handling Instructions

Trimethoprim is a bacteriostatic antibiotic and an orally active dihydrofolate reductase inhibitor. Trimethoprim is active against a wide range of Gram-positive and Gram-negative aerobic bacteria. Trimethoprim has the potential for the research of urinary tract infections, Shigellosis and Pneumocystis pneumonia. Trimethoprim can inhibit infection of Influenza A virus in chick embryo when combinated with zinc.

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

Trimethoprim Chemical Structure

Trimethoprim Chemical Structure

CAS No. : 738-70-5

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10 mM * 1 mL in DMSO
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Solid
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5 g USD 66 In-stock
10 g USD 79 In-stock
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Based on 5 publication(s) in Google Scholar

Other Forms of Trimethoprim:

Trimethoprim Related Antibodies

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  • Purity & Documentation

  • References

  • Customer Review

Description

Trimethoprim is a bacteriostatic antibiotic and an orally active dihydrofolate reductase inhibitor. Trimethoprim is active against a wide range of Gram-positive and Gram-negative aerobic bacteria. Trimethoprim has the potential for the research of urinary tract infections, Shigellosis and Pneumocystis pneumonia. Trimethoprim can inhibit infection of Influenza A virus in chick embryo when combinated with zinc[1][2][3][4].

IC50 & Target

Dihydrofolate reductase, Bacteria[1]
Influenza A virus[4]
In Vitro

Trimethoprim interrupts folate metabolism by inhibition of the activity of dihydrofolase reductase (DHFR), which reduces dihydrofolate to tetrahydrofolate (THF)[1].
Trimethoprim (3 μg/mL; 1 h) induces protein aggregation and main heat shock proteins (Hsps) in E. coli cells, which indicates that Trimethoprim sulfate presence leads to protein misfolding[1].
Trimethoprim (1.5-3 μg/mL; 1 h) causes induction of DnaK, DnaJ, GroEL, ClpB, and IbpA/B Hsps in E. coli cells exposed to folate and heat stress[1].

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

Trimethoprim Related Antibodies
In Vivo

Trimethoprim (10 mg/kg; i.v.; once every 12 h; 3 d) shows antibacterial activity against H. influenzae, S. pneumoniae, E. coli and N. meningitidis in infected mice[2].
Trimethoprim can be connected with the thiomaltose (TM-TMP) and shows stability with a half-life of about 1 hour in complete serum, and has a MIC value around 1 μM against E. coli[2].
Trimethoprim (10 mg/mL; 0.5 mL; inject with Trimethoprim-Zn combined suspension) decreases the virus titer and increases the survival rate of chicken embryo[4].

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

Animal Model: Female C3H/HeOuJ mice (transurethrally infected with a 50 μL suspension containing 1-2×107 CFU of E. coli under 3% isoflurane)[2]
Dosage: 10 mg/kg
Administration: i.v.; once every 12 h; for 3 d
Result: Showed antibacterial activity against H. influenzae, S. pneumoniae, E. coli and N. meningitidis with CD50s of 150 mg/kg, 335 mg/kg, 27.5 mg/kg and 8.4 mg/kg, respectively in infected mice.
Animal Model: Fertilized eggs (injected H3N2 virus into amniotic and allantoic space at day 8)[4]
Dosage: 10 mg/mL; 0.5 mL
Administration: The Trimethoprim-Zn combined suspension was injected into the air sac; single dosage
Result: Decreased the virus titer and increased the survival rate of chicken embryo.
The survival rate peaked at ratio about 0.18 (Zn/Trimethoprim).
Clinical Trial
Molecular Weight

290.32

Appearance

Solid

Formula

C14H18N4O3
CAS No.
SMILES

NC1=NC=C(CC2=CC(OC)=C(OC)C(OC)=C2)C(N)=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 : 50 mg/mL (172.22 mM; Need ultrasonic)

H2O : 0.67 mg/mL (2.31 mM; Need ultrasonic)

Preparing
Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 3.4445 mL 17.2224 mL 34.4447 mL
5 mM 0.6889 mL 3.4445 mL 6.8889 mL
10 mM 0.3444 mL 1.7222 mL 3.4445 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 (8.61 mM); Clear solution

  • 2.

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

    Solubility: ≥ 2.5 mg/mL (8.61 mM); Clear solution

  • 3.

    Add each solvent one by one:  10% DMSO    90% Corn Oil

    Solubility: ≥ 2.5 mg/mL (8.61 mM); Clear solution

*All of the co-solvents are available by MedChemExpress (MCE).
Purity & Documentation
References
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Trimethoprim Related Classifications

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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Keywords:

Trimethoprim738-70-5AntifolateBacterialAntibioticInfluenza VirusAntimicrobialfolatemetabolismdihydrofolatereductasetetrahydrofolateHspsproteinaggregationurinary tract infectionsShigellosisPneumocystis pneumoniaInhibitorinhibitorinhibit

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