Article Dans Une Revue JACS Au Année : 2024

High-Affinity Lectin Ligands Enable the Detection of Pathogenic Pseudomonas aeruginosa Biofilms: Implications for Diagnostics and Therapy

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Pseudomonas aeruginosa is a critical priority pathogen and causes life-threatening acute and biofilm-associated chronic infections. The choice of suitable treatment for complicated infections requires lengthy culturing for species identification from swabs or an invasive biopsy. To date, no fast, pathogen-specific diagnostic tools for P. aeruginosa infections are available. Here, we present the noninvasive pathogen-specific detection of P. aeruginosa using novel fluorescent probes that target the bacterial biofilm-associated lectins LecA and LecB. Several glycomimetic probes were developed to target these extracellular lectins and demonstrated to stain P. aeruginosa biofilms in vitro. Importantly, for the targeting of LecA an activity boost to lownanomolar affinity could be achieved, which is essential for in vivo application. In vitro, the nanomolar divalent LecA-targeted imaging probe accumulated effectively in biofilms under flow conditions, independent of the fluorophore identity. Investigation of these glycomimetic imaging probes in a murine lung infection model and fluorescence imaging revealed accumulation at the infection site. These findings demonstrate the use of LecA-and LecB-targeting probes for the imaging of P. aeruginosa infections and suggest their potential as pathogen-specific diagnostics to accelerate the start of the appropriate treatment.
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hal-04820658 , version 1 (05-12-2024)

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Eva Zahorska, Lisa Marie Denig, Stefan Lienenklaus, Sakonwan Kuhaudomlarp, Thomas Tschernig, et al.. High-Affinity Lectin Ligands Enable the Detection of Pathogenic Pseudomonas aeruginosa Biofilms: Implications for Diagnostics and Therapy. JACS Au, In press, ⟨10.1021/jacsau.4c00670⟩. ⟨hal-04820658⟩
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