1. Membrane Transporter/Ion Channel
  2. Na+/H+ Exchanger (NHE)
  3. FR183998 free base

FR183998 free base is a potent Na+/H+-exchange inhibitor, with IC50s of 0.3 nM, 3.1 nM and 6.5 nM by measurement of pHi change in rat lymphocytes, rat and human platelets, respectively.

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

FR183998 free base Chemical Structure

FR183998 free base Chemical Structure

CAS No. : 239440-20-1

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Based on 1 publication(s) in Google Scholar

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Description

FR183998 free base is a potent Na+/H+-exchange inhibitor, with IC50s of 0.3 nM, 3.1 nM and 6.5 nM by measurement of pHi change in rat lymphocytes, rat and human platelets, respectively.

IC50 & Target

IC50: 0.3 nM (Na+/H+-exchange, Rat lymphocytes), 3.1 nM (Na+/H+-exchange, Human platelet), 6.5 nM (Na+/H+-exchange, Rat platelet)[1]

In Vitro

FR183998 free base is a Na+/H+-exchange inhibitor, with IC50s of 0.3 nM, 6.5 nM and 3.1 nM by measurement of pHi change in rat lymphocytes, rat and human platelets, respectively[1].

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

In Vivo

FR183998 (0.1 and 1.0 mg/kg, i.v.) shows no effect hemodynamic parameters, and does not affect mean blood pressure and heart rate in conscious rats. Pretreatment of 0.01, 0.032, 0.10 mg/kg FR183998 or posttreament of 0.032 and 0.10 mg/kg FR183998 via intravenous administration, dose-dependently reuces reperfusion-induced ventricular fibrillation (VF) and mortality in reperfusion-induced arrhythmias in anesthetized rats, with ED50s against VF of 0.015 mg/kg and 0.070 mg/kg, respectively. FR183998 also reduces myocardial infarct sizes, and suppresses the arrhythmias in anesthetized rats[1]. FR183998 (1 mg/kg, i.v.) reduces the increase in serum levels of alanine transaminase, aspartate transaminase, and lactate dehydrogenase induced by hepatic I/R, and prevents the incidences of hepatic necrosis, apoptosis, and neutrophil infiltration. FR183998 blocks the I/R-induced activation of the NF-κB, reduces induction of iNOS and inhibits the production of nitric oxide. FR183998 also decreases the expression of the iNOS gene antisense transcript in the liver of hepatic I/R rats[2].

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

Molecular Weight

428.34

Formula

C17H19Cl2N5O2S

CAS No.
Appearance

Solid

Color

White to off-white

SMILES

O=C(C1=CC(C2=C(Cl)SC(Cl)=C2)=CC(C(NCCN(C)C)=O)=C1)NC(N)=N

Shipping

Room temperature in continental US; may vary elsewhere.

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

DMSO : 250 mg/mL (583.65 mM; Need ultrasonic; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)

Preparing
Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 2.3346 mL 11.6730 mL 23.3459 mL
5 mM 0.4669 mL 2.3346 mL 4.6692 mL
View the Complete Stock Solution Preparation Table

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month. When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

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Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)

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This equation is commonly abbreviated as: C1V1 = C2V2

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In Vivo Dissolution Calculator
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Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.
Calculation results:
Working solution concentration: mg/mL
Purity & Documentation
References
Cell Assay
[1]

Intracellular pH of rats lymphocytes is measured at 37°C with a spectrofluorometer by using the ratio of the emission (530 nm) obtained at 490- and 440-nm excitation wavelengths. After addition of 10 μL of the BCECF- and acid-loaded cells to 460 μL of Na-free buffer with 5 μL of DMSO or FR183998, 25 μL of 2.0 M NaCl (final 100 mM) is applied to start the reaction. The pHi change of cells is measured for >2 min. The initial increase in pHi in response to the added NaCl is taken as an estimate of Na+/H+-exchange activity, and the inhibitory effect of the drug is evaluated as IC50 value. The BCECF fluorescence signals are calibrated by titration with stepwise addition of small volumes of 1 M MES after permeabilization of the cells with 0.5% Triton X-100[1].

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

Animal Administration
[1]

Male Sprague-Dawley rats age 9-10 weeks are anesthetized with sodium pentobarbital (50 mg/kg, i.p.), intubated, and ventilated with room air at a stroke volume of 4.5 mL with a frequency of 50 strokes/min. Saline or FR183998 is injected into the left femoral vein (bolus i.v.) 5 min before occlusion. Thoracotomy for coronary artery ligation is performed at the left side of the thorax above the heart, and the origin of the left anterior descending coronary artery is occluded by applying negative tension by aspiration through polyethylene tubing connected to the vacuum system, which can achieve regional ischemia. Successful occlusion is confirmed by ischemia-induced alteration of electrocardiogram (ECG). After 5-min ischemia, reperfusion is performed, and the incidence of ventricular tachycardia (VT) and ventricular fibrillation (VF) of >5 s is observed intermittently over a 5-min period of reperfusion[1].

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

References

Complete Stock Solution Preparation Table

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 6 months; -20°C, 1 month. When stored at -80°C, please use it within 6 months. When stored at -20°C, please use it within 1 month.

Optional Solvent Concentration Solvent Mass 1 mg 5 mg 10 mg 25 mg
DMSO 1 mM 2.3346 mL 11.6730 mL 23.3459 mL 58.3649 mL
5 mM 0.4669 mL 2.3346 mL 4.6692 mL 11.6730 mL
10 mM 0.2335 mL 1.1673 mL 2.3346 mL 5.8365 mL
15 mM 0.1556 mL 0.7782 mL 1.5564 mL 3.8910 mL
20 mM 0.1167 mL 0.5836 mL 1.1673 mL 2.9182 mL
25 mM 0.0934 mL 0.4669 mL 0.9338 mL 2.3346 mL
30 mM 0.0778 mL 0.3891 mL 0.7782 mL 1.9455 mL
40 mM 0.0584 mL 0.2918 mL 0.5836 mL 1.4591 mL
50 mM 0.0467 mL 0.2335 mL 0.4669 mL 1.1673 mL
60 mM 0.0389 mL 0.1945 mL 0.3891 mL 0.9727 mL
80 mM 0.0292 mL 0.1459 mL 0.2918 mL 0.7296 mL
100 mM 0.0233 mL 0.1167 mL 0.2335 mL 0.5836 mL
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  • 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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FR183998 free base
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