Antimicrobial resistance is a serious public health risk. Its severity is fueled on an unprecedented scale, necessitating the demand for novel antimicrobial scaffolds aimed at novel targets. Herein, we present cationic chlorpromazine peptide conjugates that are rationally intended to targetmultidrug-resistant (MDR) bacteria. The most potent compound, CPWL, of all the conjugates evaluated, showed promising antibacterial activity against clinical, MDR S. aureus, with no cytotoxicity. The molecular docking experiments confirmed that CPWL possessed a very high affinity for S. aureus enoyl reductase (saFabI). Furthermore, CPWL antibacterial action against saFabI was further corroborated by MD simulation studies. Thus, our findings highlight cationic chlorpromazine as a promising scaffold for the development of saFabI inhibitors to target severe staphylococcal infections.
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http://dx.doi.org/10.1002/asia.202300169 | DOI Listing |
Eur J Pharm Sci
January 2025
Department of Pharmaceutical Technology and Biopharmacy, Institute of Pharmaceutical Sciences, University of Graz, Universitätsplatz 1, 8010, Graz, Austria. Electronic address:
Cationic nanostructured lipid carriers (cNLCs) represent promising non-viral carriers for nucleic acids, such as miRNAs, forming stable self-assembled miRNA complexes due to electrostatic interactions. Prepared by high-pressure homogenization, cNLC formulations, both with and without Nile Red dye demonstrated stable particle sizes in the range of 100-120 nm and positive surface charges (>30 mV), which are necessary for effective cellular uptake. The miRNA complexes formed at mass ratios of 1:2.
View Article and Find Full Text PDFFree Radic Res
November 2024
School of Chemical Sciences, University of Auckland, Auckland, New Zealand.
A series of eight nitroxide compounds (four substituted piperidines, three pyrrolidines and one oxo-piperidine) are found to undergo electron transfer to 2'-deoxyribose-peroxyl and the guanyl radical. One-electron oxidation potentials of the nitroxides to oxoammonium cations (oxoammonium reduction potential), , have been measured against a common redox indicator, chlorpromazine, and found to span the range 751 ± 15 mV to 973 ± 15 mV. Fast chemical reduction of the 2'-deoxyribose-peroxyl radical to the hydroperoxide, generated by OH radical attack on 2-deoxyribose, dR, in oxygenated aqueous solution, is a redox-dependent reaction, with rate constants of 0.
View Article and Find Full Text PDFA method was established for the simultaneous detection of 12 prohibited veterinary drugs, including -receptor agonists, nitrofuran metabolites, nitroimidazoles, chlorpromazine, and chloramphenicol, in pig urine. The sample was pretreated by enzymolysis, acid hydrolysis/derivatization, and liquid-liquid extraction combined with solid-phase extraction. Detection was performed using ultra high performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS).
View Article and Find Full Text PDFFuture Microbiol
June 2024
College of Life Sciences, Shaanxi Normal University, Xi'an, 710119, PR China.
The response of ATCC8739 to Brevinin-2CE (B2CE) was evaluated as a strategy to prevent the development of antimicrobial peptide (AMP)-resistant bacteria. Gene expression levels were detected by transcriptome sequencing and RT-PCR. Target genes were knocked out using CRISPR-Cas9.
View Article and Find Full Text PDFUnlabelled: Lysosomes are central players in cellular catabolism, signaling, and metabolic regulation. Cellular and environmental stresses that damage lysosomal membranes can compromise their function and release toxic content into the cytoplasm. Here, we examine how cells respond to osmotic stress within lysosomes.
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