A series of new 2-[4-(3,4-dimethoxyphenoxy)phenyl]-1,N-disubstituted-1H-benzimidazole-5-carboxamidines (23-33) have been synthesized and evaluated for their potential antistaphylococcal activity. Cytotoxic effects of the compounds were investigated by the neutral red uptake (NRU) cytotoxicity test. Most of the compounds exhibited good MICs values against Staphylococcus aureus and methicillin-resistant S. aureus (MRSA). Compound 28 with N-cyclohexylcarboxamidine group at the 5-position was found to be the most potent agent, with the MIC value of 3.12 µg/mL.
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http://dx.doi.org/10.3109/14756366.2014.899593 | DOI Listing |
Nanotheranostics
January 2025
Department of Research and Innovation, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences (SIMATS), Thandalam, Chennai - 602105, Tamil Nadu, India.
In an era where chemical synthesis of nanomaterial is accounting for the generation of toxic wastes, leading to nanotoxicity, the present work focuses on the extraction of carbon nanodots from available natural sources such as turmeric smoke. The extracted carbon nanodots were characterized and their physical and chemical attributes were confirmed. The antibacterial property of the isolated carbon nanodots was tested against coliforms and oral bacteria.
View Article and Find Full Text PDFJ Antimicrob Chemother
December 2024
Division of Infection Disease, The Lundquist Institute at Harbor-UCLA Medical Center, Torrance, CA, USA.
Background: Methicillin-resistant Staphylococcus aureus (MRSA) are resistant to nearly all β-lactam antibiotics under standard testing conditions. However, a novel phenotype exists wherein certain MRSA strains exhibit β-lactam susceptibility in the presence of bicarbonate (termed 'NaHCO3-responsive'), an abundant ion in mammalian tissues and blood. This suggests that specific MRSA infections may be treatable by β-lactams.
View Article and Find Full Text PDFCell Rep Med
December 2024
State Key Laboratory of Drug Research, Centre for Chemical Biology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China; School of Pharmaceutical Science and Technology, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China; University of Chinese Academy of Sciences, Beijing 100049, China; School of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing 210023, China; Shandong Laboratory of Yantai Drug Discovery, Bohai Rim Advanced Research Institute for Drug Discovery, Yantai 264117, China. Electronic address:
Methicillin-resistant Staphylococcus aureus is a ubiquitous pathogen, posing a serious threat to human health worldwide. Thus, there is a high demand for antibiotics with distinct targets. Caseinolytic protease P (ClpP) is a promising target for combating staphylococcal infections; however, selectively activating S.
View Article and Find Full Text PDFChem Biodivers
November 2024
Medical Microbiology Laboratory, Institut Pasteur du Maroc, Casablanca, Morocco.
Staphylococcal infections challenge current treatments due to adverse effects and drug resistance, prompting the exploration of plant-derived compounds for their promising properties. This study aimed to analyze Syzygium aromaticum essential oil (SA-EO), aqueous (AE-SA) and ethyl acetate (EAE-SA) extracts for antioxidant and antistaphylococcal effects against sensitive and resistant clinical isolates. Erythrocytes were used as model cells for biocompatibility.
View Article and Find Full Text PDFAntibiotics (Basel)
October 2024
Department of Biology and Ecology, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovica 3, 21000 Novi Sad, Serbia.
Background: MSSA and MRSA strains are challenging human pathogens that can develop resistance to antibiotics, highlighting the need for alternative antimicrobial agents. Plant metabolites, particularly volatile phytochemicals, may offer promising antimicrobial properties. The aim was to evaluate the antimicrobial and antibiofilm efficacy of various commercial volatile phytochemicals from the terpene and terpenoid groups against reference MSSA and MRSA strains, focusing on synergistic effects in both binary combinations and combinations with antibiotics.
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