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Discovery of Quinazolone Pyridiniums as Potential Broad-Spectrum Antibacterial Agents.
Molecules
January 2025
Institute of Bioorganic & Medicinal Chemistry, Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China.
The overprescription of antibiotics in medicine and agriculture has accelerated the development and spread of antibiotic resistance in bacteria, which severely limits the arsenal available to clinicians for treating bacterial infections. This work discovered a new class of heteroarylcyanovinyl quinazolones and quinazolone pyridiniums to surmount the increasingly severe bacterial resistance. Bioactive assays manifested that the highly active compound exhibited strong inhibition against MRSA and with extremely low MICs of 0.
View Article and Find Full Text PDFSynergistic Antibacterial Action of Norfloxacin-Encapsulated G4 Hydrogels: The Role of Boronic Acid and Cyclodextrin.
Gels
January 2025
"Petru Poni" Institute of Macromolecular Chemistry, Romanian Academy, Centre of Advanced Research in Bionanoconjugates and Biopolymers, Grigore Ghica Voda Alley 41 A, 700487 Iasi, Romania.
In this present study, we developed and characterized a series of supramolecular G4 hydrogels by integrating -cyclodextrin (-CD) and boronic acid linkers into a supramolecular matrix to enhance antibacterial activity against (). We systematically investigated how varying the number of free boronic acid moieties (ranging from two to six), along with guanosine and β-CD content, influences both the structural integrity and antimicrobial efficacy of these materials. Comprehensive characterization using FTIR, circular dichroism, X-ray diffraction, SEM, AFM, and rheological measurements confirmed successful synthesis and revealed that higher boronic acid content correlated with a stronger, more organized network.
View Article and Find Full Text PDFEvaluation of the antibacterial and inhibitory activity of the NorA and TetK efflux pumps of Staphylococcus aureus by p-coumaric acid.
Microb Pathog
January 2025
Postgraduate Program in Biological Sciences (PPGCB), Federal University of Pernambuco (UFPE), 50670-901, Recife, PE, Brazil. Electronic address:
The NorA and TetK efflux pumps mediate resistance to fluoroquinolone and tetracycline antibiotics by actively extruding these compounds and reducing their intracellular concentrations. Consequently, intense research has focused on inhibiting these efflux mechanisms using antimicrobial agents derived from natural or synthetic sources. This study used Fourier transform infrared spectroscopy (ATR-FTIR) to analyze the various functional groups present in p-coumaric acid.
View Article and Find Full Text PDFNorfloxacin Fluorescent Probe for the Assessment of Cefepime in Biological Fluids and Pharmaceutical Formulation; Investigation of the Greenness and Blueness Characteristics.
Luminescence
January 2025
Department of Chemistry, College of Science, Jouf University, Sakaka, Aljouf, Saudi Arabia.
In the present study, a norfloxacin (NFX) fluorescent probe was tailored for the spectrofluorometric measurement of cefepime (CFP). The proposed approach measured the quenching effect of CFP on the fluorescence intensity of NFX in acetate buffer solution. The obtained results show that CFP strongly quenches the fluorescence of NFX in a static mechanism.
View Article and Find Full Text PDFRemoval of Ciprofloxacin and Norfloxacin from Aqueous Solution with Activated Carbon from Cupuaçu () Bark.
Molecules
December 2024
Postgraduate Program in Amazonian Natural Resources Engineering, Federal University of Pará, Rua Augusto Correa, 01, Belém 66075-110, Brazil.
The widespread use of antibiotics such as fluoroquinolones (FQs) has raised environmental and health concerns. This study is innovative as we investigate the removal of ciprofloxacin (CIP) and norfloxacin (NOR) from water using activated carbon derived from cupuaçu bark (CAC). This previously discarded biomass is now a low-cost raw material for the production of activated carbon, boosting the local economy.
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