home        services        consulting       facilities      about us     meet the team     publications     careers     contact us
Services Offered
In vitro Susceptibility Anaerobic Testing Bactericidal/ Bacteriostatic Assessments Resistance Development Mechanism of Action High Throughput Screening Bacterial Identification Molecular biology Test Method Development
Determining the mechanism of action (MOA) of new agents is essential to the discovery process and is also a required component of the Investigational New Drug (IND) filing. Micromyx utilizes a variety of whole cell, molecular, and biochemical techniques to determine the MOA:
Macromolecular Synthesis Labeling

Whole cell assays involving specific radiolabeling of DNA, RNA, protein, cell wall, and lipid pathways. Inhibition of each pathway is examined using concentrations of the test agent above and below the MIC value.

Models established in Staphylococcus aureus, Enterococcus faecalis, Escherichia coli, and Clostridium difficile.

In vitro Transcription/Translation Assay

Antimicrobial agents that are shown to inhibit protein synthesis in the macromolecular synthesis assay (shown above) are further validated using an E. coli extract and luciferase reporter system. An IC50 value is generated and compared to the MIC of the test agent.
Cell Permeability Assay

Effect of Polymyxin B on ATP Release From Staphylococcus aureus ATCC 29213

Antimicrobial agents that target the cell membrane and cause leakage of essential small molecules are assessed by measuring the leakage of ATP into the growth medium as the cells are dosed with concentrations of the test agent above and below the MIC value.

Enzyme Assays

Micromyx can evaluate the ability of test agents to inhibit enzymatic reactions in either crude extracts or in purified enzyme systems.

Red blood cell lysis

Using red blood cells of any available orgin (human, sheep, mouse, etc.), test agents are dosed at levels above and below the MIC value. In order to assess lysis, hemoglobin release is measured using a spectrophotometer.