A minor structure modification serendipitously leads to a highly carbapenemase-specific fluorogenic probe

Area of Science:

• Biochemistry
• Analytical Chemistry
• Microbiology

Background:

• Carbapenemase enzymes are a significant threat in antimicrobial resistance.
• Existing detection methods for carbapenemases can lack specificity or broad applicability.
• Accurate and rapid detection of carbapenemase activity is crucial for effective treatment strategies.

Purpose of the Study:

• To develop and characterize a novel fluorogenic probe for detecting carbapenemase activity.
• To assess the probe's specificity against various carbapenemases and other beta-lactamases.
• To provide a sensitive tool for identifying carbapenemase-producing bacteria.

Main Methods:

• Design of a fluorogenic probe incorporating a carbapenem recognition motif.
• Incorporation of a carbon-carbon double bond linkage between the carbapenem and fluorophore.
• Testing the probe's activity against purified carbapenemases (metallo- and serine- types) and other beta-lactamases.

Main Results:

• The developed fluorogenic probe demonstrated high sensitivity for detecting carbapenemase activity.
• The probe exhibited broad specificity, effectively detecting both metallo carbapenemases and serine carbapenemases.
• The probe showed minimal cross-reactivity with other common beta-lactamases, ensuring accurate identification.

Conclusions:

• The novel fluorogenic probe is a highly specific and sensitive reagent for detecting carbapenemase activity.
• This probe offers a valuable tool for clinical diagnostics and research, aiding in the identification of carbapenemase-producing organisms.
• The probe's ability to detect all major classes of carbapenemases enhances its utility in combating antimicrobial resistance.