Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
Daptomycin is an important clinical antibiotic for which resistance is rising. Daptomycin resistant strains of often have increased 1,2-diacyl--3-[phospho-1-(3-lysyl(1-glycerol))] (lysyl-PG) and mutations to the proteins directly involved in the synthesis and translocation of lysyl-PG are implicated in resistance mechanisms. To study the interaction of daptomycin with lysyl-DMPG-containing model membranes a new stereospecific and regioselective synthesis of lysyl-DMPG was developed. Studies on model membranes containing lysyl-DMPG demonstrate that: (1) daptomycin is not significantly repelled by the cationic charge of lysyl-DMPG; (2) daptomycin binds less avidly to lysyl-DMPG compared to DMPG; (3) the presence of lysyl-DMPG does not impact the membrane bound backbone conformation of daptomycin in a significant way; (4) lysyl-DMPG increases oligomer formation; (5) lysyl-DMPG does not impact model membrane fluidity at lysyl-PG : PG ratios that are relevant to daptomycin resistance. The results of these studies suggest that increased lysyl-PG content does not confer resistance to daptomycin by altering membrane fluidity or reducing membrane affinity but may confer resistance by altering the structure of daptomycin oligomers.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1039/d2ob01384c | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Viscosity-sensitive fluorescent probes based on the hemicyanine for the organelle-specific visualization during autophagy and ferroptosis.
Spectrochim Acta A Mol Biomol Spectrosc
September 2025
College of Chemistry, Chemical Engineering and Material Science, Soochow University, No. 199 Ren'Ai Road, Suzhou 215123, China; Jiangsu Key Laboratory of Medical Optics, Suzhou Institute of Biomedical Engineering and Technology, Chinese Academy of Science, Suzhou 215163, China. Electronic address: g
The dynamic monitoring of cell death processes remains a significant challenge due to the scarcity of highly sensitive molecular tools. In this study, two hemicyanine-based probes (5a-5b) with D-π-A structures were developed for organelle-specific viscosity monitoring. Both probes exhibited correlation with the Förster-Hoffmann viscosity-dependent relationship (R > 0.
View Article and Find Full Text PDFExpanded field OCTA Biomarkers Associated with the Development of Tractional Retinal Detachment in Proliferative Diabetic Retinopathy.
Retina
September 2025
Harvard Retinal Imaging Lab, Massachusetts Eye and Ear, Boston, MA, USA.
Purpose: To investigate associations among expanded field swept-source optical coherence tomography angiography (SS-OCTA) biomarkers and the development of tractional retinal detachment (TRD) in patients with proliferative diabetic retinopathy (PDR).
Methods: Patients with PDR without TRD at baseline were imaged with SS-OCTA. Quantitative and qualitative OCTA metrics were independently evaluated by two trained graders.
Antithrombin-binding heparan sulfate is ubiquitously expressed in epithelial cells and suppresses pancreatic tumorigenesis.
J Clin Invest
September 2025
Department of Cellular and Molecular Medicine, UCSD, La Jolla, United States of America.
3-O-sulfation of heparan sulfate (HS) is the key determinant for binding and activation of Antithrombin III (AT). This interaction is the basis of heparin treatment to prevent thrombotic events and excess coagulation. Antithrombin-binding HS (HSAT) is expressed in human tissues, but is thought to be expressed in the subendothelial space, mast cells, and follicular fluid.
View Article and Find Full Text PDFSynovial MS4A4A correlates with inflammation and counteracts response to corticosteroids in arthritis.
Proc Natl Acad Sci U S A
September 2025
Centre for Experimental Medicine & Rheumatology, William Harvey Research Institute and Barts and The London School of Medicine and Dentistry, Queen Mary University of London, London EC1M 6BQ, United Kingdom.
MS4A4A belongs to the MS4A tetraspan protein superfamily and is selectively expressed by the monocyte-macrophage lineage. In this study, we aimed to evaluate the role of MS4A4A+ macrophages in rheumatoid arthritis (RA) pathogenesis and response to treatment. RNA sequencing and immunohistochemistry of synovial samples from either early treatment-naïve or active chronic RA patients showed that MS4A4A expression positively correlated with synovial inflammation.
View Article and Find Full Text PDFProto-SLIPS: Slippery Liquid-Infused Surfaces that Release Highly Water-Soluble Agents.
ACS Appl Mater Interfaces
September 2025
Department of Chemistry, University of Wisconsin-Madison, 1101 University Ave., Madison, Wisconsin 53706, United States.
Slippery liquid-infused porous surfaces (or "SLIPS") can prevent bacterial surface fouling, but they do not inherently possess the means to kill bacteria or reduce cell loads in surrounding media. Past reports show that the infused liquids in these materials can be leveraged to load and release antimicrobial agents, but these approaches are generally limited to the use of hydrophobic agents that are soluble in the infused oily phases. Here, we report the design of so-called "proto-SLIPS" that address this limitation and permit the release of highly water-soluble (or oil-insoluble) agents.
View Article and Find Full Text PDF