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Antimicrobial Peptides Produced by Selective Pressure Incorporation of Non-canonical Amino Acids

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CEM-101 activity against Gram-positive organisms.

Leah N Woosley¹, Mariana Castanheira, Ronald N Jones

¹JMI Laboratories, North Liberty, IA 52317, USA.

Antimicrobial Agents and Chemotherapy

|February 24, 2010

Summary

CEM-101, a novel fluoroketolide, demonstrates potent in vitro activity against Gram-positive bacteria, showing greater bactericidal effects and lower resistance development than comparators. This new antimicrobial agent warrants further clinical evaluation for its promising characteristics.

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Detection of Bacteria Using Fluorogenic DNAzymes

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Published on: May 28, 2012

Area of Science:

Microbiology
Pharmacology
Infectious Diseases

Background:

Macrolide resistance is a growing concern in treating Gram-positive bacterial infections.
Novel antimicrobial agents are needed to overcome existing resistance mechanisms.

Purpose of the Study:

To evaluate the in vitro antimicrobial activity of CEM-101, a new fluoroketolide.
To compare CEM-101's efficacy and resistance profile against established agents like telithromycin, macrolides, and lincosamides.

Main Methods:

Minimum inhibitory concentrations (MICs) and minimum bactericidal concentrations (MBCs) were determined.
Timed killing assays, mutation rate studies, and postantibiotic effect (PAE) were performed.
Drug interaction synergy analyses were conducted.

Main Results:

CEM-101 exhibited potent bactericidal activity against Gram-positive organisms, with lower MBCs and greater potency than telithromycin.
Low propensity for resistance development was observed in single-step and multi-step mutation studies.
CEM-101 demonstrated significant concentration-dependent postantibiotic effects and synergistic activity with certain antibiotics.

Conclusions:

CEM-101 displays favorable in vitro antimicrobial characteristics, including potent activity and a low resistance potential.
Its efficacy and safety profile suggest CEM-101 is a promising candidate for further clinical investigation.
CEM-101 represents a valuable addition to the therapeutic options against challenging Gram-positive bacterial infections.