Effects of singlet oxygen generated by a broad-spectrum viral fusion inhibitor on membrane nanoarchitecture

Authors
Hollmann, Axel; Gonçalves, Sónia; Augusto, Marcelo T.; Castanho, Miguel A.R.B.; Lee, Benhur; Santos, Nuno C.
Publication Year
2015
Language
English
Format
article
Status
Published version
Description
Targeting membranes of enveloped viruses represents an exciting new paradigm to explore on the development of broad-spectrum antivirals. Recently, broad-spectrum small-molecule antiviral drugs were described, preventing enveloped virus entry at an intermediate step, after virus binding but before virus-cell fusion. Those compounds, including an oxazolidine-2,4-dithione named JL103 that presented the most promissing results, act deleteriously on the virus envelope but not at the cell membrane level. In this work, by using atomic force microscopy (AFM), we aimed at unraveling the effects that JL103 is able to induce in the lipid membrane architecture at the nanoscale. Our results indicate that singlet oxygen produced by JL103 decreases membrane thickness, with an expansion of the area per phospholipid, by attacking the double bonds of unsaturated phospholipids. This membrane reorganization prevents the fusion between enveloped virus and target cell membranes, resulting in viral entry inhibition. From the Clinical Editor: The recent development of a family of innovative broad-spectrum small-molecule antiviral drugs that block virus cell entry has provided exciting armors against viruses. In this research paper, the authors utilize atomic force microscopy to investigate the mechanism of action of viral blockade. The findings have resulted in new understanding of cell membrane behavior, which may help in further drug design.
Fil: Hollmann, Axel. Universidade de Lisboa. Faculdade de Medicina. Instituto de Medicina Molecular; Portugal. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Gonçalves, Sónia. Universidade de Lisboa. Faculdade de Medicina. Instituto de Medicina Molecular; Portugal
Fil: Augusto, Marcelo T.. Universidade de Lisboa. Faculdade de Medicina. Instituto de Medicina Molecular; Portugal
Fil: Castanho, Miguel A.R.B.. Universidade de Lisboa. Faculdade de Medicina. Instituto de Medicina Molecular; Portugal
Fil: Lee, Benhur. Icahn School of Medicine at Mount Sinai. Department of Microbiology; Estados Unidos
Fil: Santos, Nuno C.. Universidade de Lisboa. Faculdade de Medicina. Instituto de Medicina Molecular; Portugal
Subject
AFM
BROAD-SPECTRUM ANTIVIRAL
MEMBRANE ORGANIZATION
SINGLET OXYGEN
Otras Ciencias Biológicas
Ciencias Biológicas
CIENCIAS NATURALES Y EXACTAS
Access level
Open access
License
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repository
CONICET Digital (CONICET)
Institution
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identifier
oai:ri.conicet.gov.ar:11336/38383