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Multidrug resistance (MDR) presents a growing challenge to global public health. Drug extrusion transporters play a critical part in MDR; thus, their mechanisms of substrate recognition are being studied in great detail. In this work, we review common structural features of key transporters involved in MDR. Based on our membrane potential-driving hypothesis, we propose a general energy-coupling mechanism for secondary-active antiporters. This putative mechanism provides a common framework for understanding poly-specificity of most-if not all-MDR transporters.
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http://dx.doi.org/10.1002/pro.3355 | DOI Listing |
BMC Infect Dis
September 2025
Department of Laboratory Medicine, Affiliated Hospital of Medical School, Nanjing Drum Tower Hospital, Nanjing University, Nanjing, China.
Background: Serratia marcescens is an opportunistic pathogen increasingly associated with healthcare-associated infections and rising antimicrobial resistance. The emergence of multidrug-resistant (MDR) and carbapenem-resistant S. marcescens (CRSM) presents significant therapeutic challenges.
View Article and Find Full Text PDFNPJ Antimicrob Resist
September 2025
Antimicrobial Resistance & Microbiome Research Group, Department of Biology, The Kathleen Lonsdale Institute for Human Health Research, Maynooth University, Maynooth, Co, Kildare, Ireland.
Plasmids facilitate antimicrobial resistance (AMR) gene spread via horizontal gene transfer, yet the mobility of genes in wastewater treatment plant (WWTP) resistomes remains unclear. We sequenced 173 circularised plasmids transferred from WWTP effluent into Escherichia coli and characterised their genetic content. Multiple multidrug-resistant plasmids were identified, with a significant number of mega-plasmids (>100 kb).
View Article and Find Full Text PDFNPJ Biofilms Microbiomes
September 2025
Research Group Medical Systems Biology, University Hospital Schleswig-Holstein Campus Kiel, 24105 Kiel University, Kiel, Schleswig-Holstein, Germany.
Urinary tract infections (UTIs) are among the most common bacterial infections and are increasingly complicated by multidrug resistance (MDR). While Escherichia coli is frequently implicated, the contribution of broader microbial communities remains less understood. Here, we integrate metatranscriptomic sequencing with genome-scale metabolic modeling to characterize active metabolic functions of patient-specific urinary microbiomes during acute UTI.
View Article and Find Full Text PDFRev Argent Microbiol
September 2025
Laboratorio de Bacteriología, Departamento de Bioquímica Clínica, Hospital de Clínicas José de San Martín, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, INFIBIOC, UBA, Buenos Aires, Argentina.
Thirty consecutive multidrug-resistant non-carbapenemase-producing Pseudomonas aeruginosa clinical isolates from patients admitted at a university hospital were studied. Resistance rates to ceftazidime/avibactam, aztreonam/avibactam, ceftolozane/tazobactam and imipenem/relebactam were 40%, 88%, 3%, and 20%, respectively. Ceftazidime/avibactam reverted ceftazidime resistance in 25% of the isolates, whereas imipenem/relebactam did so in 77% of the imipenem-resistant isolates.
View Article and Find Full Text PDFBiochem Pharmacol
September 2025
Key Laboratory of Artificial Organs and Computational Medicine in Zhejiang Province, Institute of Translational Medicine, Zhejiang Shuren University, 310015 Hangzhou, China. Electronic address:
Methicillin-resistant Staphylococcus aureus (MRSA) is a highly virulent and drug-resistant pathogen frequently causing bacterial pneumonia. Currently, there are limited effective treatments available due to the rapidly evolving resistance of bacteria. Therefore, there is an urgent need to develop novel therapies that focus on host-pathogen interactions.
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