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We synthesized a range of PQS (Pseudomonas quinolone signal; 2-heptyl-3-hydroxy-4(1H)-quinolone) analogues and tested them for their ability to stimulate MvfR-dependent pqsA transcription, MvfR-independent pyoverdine production, and membrane vesicle production. The structure-activity profile of the PQS analogues was different for each of these phenotypes. Certain inactive PQS analogues were also found to strongly synergize PQS-dependent pyoverdine production.
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http://dx.doi.org/10.1128/JB.00081-10 | DOI Listing |
Allergol Immunopathol (Madr)
September 2025
Department of Emergency Medicine, Tuzla State Hospital, İstanbul, Turkey.
Desensitization is an immunological process that creates temporary tolerance to a drug, which disappears once treatment is discontinued. Ciprofloxacin is a commonly used antibiotic, particularly for chronic lung diseases, yet there are very few desensitization protocols for it. Two ciprofloxacin desensitization schemes were developed a long time ago.
View Article and Find Full Text PDFFront Biosci (Landmark Ed)
August 2025
Department of Biological Sciences, Louisiana State University, Baton Rouge, LA 70803, USA.
CysB is a member of the large bacterial LysR-type transcriptional regulator (LTTR) protein family. Like the majority of LTTRs, CysB functions as a homotetramer in which each subunit has an N-terminal winged-helix-turn-helix (wHTH) DNA-binding domain connected to an effector-binding domain by a helical hinge region. CysB is best known for its role in regulating the expression of genes associated with sulfur uptake and biosynthesis of cysteine in Gram-negative species such as and .
View Article and Find Full Text PDFPLoS One
September 2025
Faculty of Health, Institute of Pharmacology and Toxicology, Centre for Biomedical Education and Research (ZBAF), School of Medicine, Witten/Herdecke University, Witten, Germany.
The emergence of antibiotic resistance continues to pose a significant global challenge. Drug repurposing, wherein existing therapeutics are evaluated for new applications, offers a promising strategy to address this issue. Farnesyltransferase inhibitors (FTIs), initially developed for cancer therapy, have demonstrated antimicrobial activity against several gram-positive bacteria.
View Article and Find Full Text PDFInt J Food Microbiol
August 2025
Food Safety Laboratory, College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China. Electronic address:
Pseudomonas aeruginosa (P. aeruginosa) is an opportunistic pathogen that poses significant risks in food-related environments. Bacteriophages have emerged as a promising alternative strategy to control P.
View Article and Find Full Text PDFPLoS Genet
September 2025
Department of Chemical and Biological Engineering, Princeton University, Princeton, New Jersey, United States of America.
Studies have shown that DNA damage repair systems, including homologous recombination (HR) and the SOS response, are important for fluoroquinolone (FQ) persistence of Escherichia coli, which has been the workhorse organism of persister research. We sought to explore whether those systems are also important for FQ persistence of Pseudomonas aeruginosa, a common cause of lung infections in cystic fibrosis patients, which can be treated with FQs such as ciprofloxacin (CIP). Notably, P.
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