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Specificity and tunability of efflux pumps: A new role for the proton gradient?
PLoS Comput Biol
January 2025
Department of Physics, University of Toronto, Toronto, Ontario, Canada.
Efflux pumps that transport antibacterial drugs out of bacterial cells have broad specificity, commonly leading to broad spectrum resistance and limiting treatment strategies for infections. It remains unclear how efflux pumps can maintain this broad spectrum specificity to diverse drug molecules while limiting the efflux of other cytoplasmic content. We have investigated the origins of this broad specificity using theoretical models informed by the experimentally determined structural and kinetic properties of efflux pumps.
View Article and Find Full Text PDFUnlabelled: is a high-priority organism for the development of new antibacterial treatments. We found that the antimalarial medication mefloquine (MFQ) permeabilized the bacterial cell membrane of , decreased membrane fluidity, and caused physical injury to the membrane. MFQ also maintained activity across different pH conditions (PH range 5-8).
View Article and Find Full Text PDFEpigenetic modulation of doxorubicin resistance and strategies for enhancing chemotherapeutic sensitivity.
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January 2025
Department of Biotechnology, School of Bioengineering, College of Engineering and Technology, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Chengalpattu District, Tamil Nadu, India. Electronic address:
With the rising global cancer burden, the dependency on chemotherapy also rises along with the complication of chemoresistance development. Studies on multi-drug resistant proteins provide a wide range of regulators, although the exact mechanism is not yet clearly understood. Epigenetic modifications play a vital role in the regulation of cellular processes and also in determining the efficacy of cancer therapy by modulating resistance development and tumor progression.
View Article and Find Full Text PDFMechanisms of multidrug resistance caused by an Ipi1 mutation in the fungal pathogen Candida glabrata.
Nat Commun
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Department of Respiratory Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.
Multidrug resistance in the pathogenic fungus Candida glabrata is a growing global threat. Here, we study mechanisms of multidrug resistance in this pathogen. Exposure of C.
View Article and Find Full Text PDFColistin antibacterial activity, clinical effectiveness, and mechanisms of intrinsic and acquired resistance.
Microb Pathog
January 2025
Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran. Electronic address:
Following a period of disuse owing to the emergence of multidrug-resistant Gram-negative bacteria, colistin has regained global attention as an antibiotic of last resort. The resurgence in its utilization has led to a concurrent increase in acquired resistance, presenting a significant challenge in clinical treatment. Predominantly, resistance mechanisms involve alterations in the lipid A component of the lipopolysaccharide (LPS) structure.
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