Pretomanid (PA-824)

Catalog No.S1162 Batch:S116201

Technical Data

Formula

C₁₄H₁₂F₃N₃O₅

Molecular Weight

359.26

CAS No.

187235-37-6

Solubility (25°C)*

In vitro

DMSO

72 mg/mL (200.41 mM)

Ethanol

16 mg/mL (44.53 mM)

Water

Insoluble

In vivo (Add solvents to the product individually and in order)

Homogeneous suspension

0.5% methylcellulose

10.0mg/ml

Taking the 1 mL working solution as an example, take 10 mg of this product, add it to 1 ml of 0.5% methylcellulose clear solution, and mix evenly to form a uniform suspension. The mixed solution should be used immediately for optimal results.

* <1 mg/ml means slightly soluble or insoluble.
* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.
* Room temperature shipping (Stability testing shows this product can be shipped without any cooling measures.)

Preparing Stock Solutions

Biological Activity

Description

PA-824 is an anti-tuberculosis drug for tuberculosis with MIC less than 2.8 μM.Phase 2.

Targets

tuberculosis ^[1]

In vitro

In vitro, PA-824 exhibits the high activity against multidrug-resistant clinical isolates from Asia (India and South Korea) and from throughout the United States (MIC < 1 μg/ml) and is equally active against the drug-sensitive and multidrug-resistant isolates of M. tuberculosis (MICs range, 0.039 to 0.531 μg/ml). ^[1] A recent study shows that single-nucleotide polymorphisms of PA-824 resistance genes (fgd1 [Rv0407] and ddn [Rv3547]) don't significantly affect the PA-824 MICs (≤ 0.25 μg/ml). ^[2]

In vivo

In the rapid tuberculosis mouse model, PA-824 shows significant anti-microbial activity in a dose-dependent manner: at 50 mg/kg, PA-824 in MC produces a more than 1-log reduction of the CFU in the lungs; at 100 mg/kg it produces about a 2-log reduction, and at 300 mg/kg it produces a 3-log reduction. Furthermore, long-term treatment of PA-824 at 100 mg/kg in cyclodextrin/lecithin also leads to the reduction of the bacterial load below 500 CFU in the lungs and spleen. ^[1] PA-824 exhibits time-dependent anti-microbial activity in a murine model of tuberculosis with a maximal observed bactericidal effect of 0.1 log CFU/day over 24 days. ^[3]

Features

An experimental anti-tuberculosis drug.

Protocol (from reference)

Cell Assay:^{^[1]}	Cell lines M. tuberculosis H37Rv Concentrations 2.0 μg/mL - 8.0 pg/mL Incubation Time 21 days Method A method is used to determine the MICs by a microdilution plate assay by using M. tuberculosis H37Rv. INH is dissolved in sterile, double-distilled water at a stock concentration of 500 μg/ml. PA-824 is dissolved in 100% dimethyl sulfoxide (DMSO) to a stock concentration of 100 μg/ml. A 1:2 dilution series of both compounds is made in a separate 96-well microtiter plate by using the same diluents. The interior 60 wells of a 96-well round-bottom microtiter assay plate are seeded with 98 μl of bacterial suspension. Two microliters of each drug is transferred to the assay plate wells containing bacteria. The final concentrations of INH in the wells range from 10.0 to 0.039 μg/mL; the final concentrations of PA-824 range from 2.0 μg/mL to 8.0 pg/mL. The assay plates are incubated at 37 °C for at least 21 days and are observed every 3 to 4 days to evaluate changes in growth. Inhibition of growth is determined both by visual examination and with a spectrophotometer at an OD600.
Animal Study:^{^[1]}	Animal Models Gamma interferon gene-disrupted (GKO) mice are infected via a low-dose aerosol exposure to M. tuberculosis Erdman. Dosages ≤300 mg/kg Administration Administered via p. o.

Cell Assay:^{^[1]}

Cell lines
M. tuberculosis H37Rv
Concentrations
2.0 μg/mL - 8.0 pg/mL
Incubation Time
21 days
Method
A method is used to determine the MICs by a microdilution plate assay by using M. tuberculosis H37Rv. INH is dissolved in sterile, double-distilled water at a stock concentration of 500 μg/ml. PA-824 is dissolved in 100% dimethyl sulfoxide (DMSO) to a stock concentration of 100 μg/ml. A 1:2 dilution series of both compounds is made in a separate 96-well microtiter plate by using the same diluents. The interior 60 wells of a 96-well round-bottom microtiter assay plate are seeded with 98 μl of bacterial suspension. Two microliters of each drug is transferred to the assay plate wells containing bacteria. The final concentrations of INH in the wells range from 10.0 to 0.039 μg/mL; the final concentrations of PA-824 range from 2.0 μg/mL to 8.0 pg/mL. The assay plates are incubated at 37 °C for at least 21 days and are observed every 3 to 4 days to evaluate changes in growth. Inhibition of growth is determined both by visual examination and with a spectrophotometer at an OD600.

Animal Study:^{^[1]}

Animal Models
Gamma interferon gene-disrupted (GKO) mice are infected via a low-dose aerosol exposure to M. tuberculosis Erdman.
Dosages
≤300 mg/kg
Administration
Administered via p. o.

References

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SHIPPING AND STORAGE
Selleck products are transported at room temperature. If you receive the product at room temperature, please rest assured, the Selleck Quality Inspection Department has conducted experiments to verify that the normal temperature placement of one month will not affect the biological activity of powder products. After collecting, please store the product according to the requirements described in the datasheet. Most Selleck products are stable under the recommended conditions.

NOT FOR HUMAN, VETERINARY DIAGNOSTIC OR THERAPEUTIC USE.