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- W2779102422 abstract "Viral infections kill millions yearly. Available antiviral drugs are virus-specific and active against a limited panel of human pathogens. There are broad-spectrum substances that prevent the first step of virus–cell interaction by mimicking heparan sulfate proteoglycans (HSPG), the highly conserved target of viral attachment ligands (VALs). The reversible binding mechanism prevents their use as a drug, because, upon dilution, the inhibition is lost. Known VALs are made of closely packed repeating units, but the aforementioned substances are able to bind only a few of them. We designed antiviral nanoparticles with long and flexible linkers mimicking HSPG, allowing for effective viral association with a binding that we simulate to be strong and multivalent to the VAL repeating units, generating forces (∼190 pN) that eventually lead to irreversible viral deformation. Virucidal assays, electron microscopy images, and molecular dynamics simulations support the proposed mechanism. These particles show no cytotoxicity, and in vitro nanomolar irreversible activity against herpes simplex virus (HSV), human papilloma virus, respiratory syncytial virus (RSV), dengue and lenti virus. They are active ex vivo in human cervicovaginal histocultures infected by HSV-2 and in vivo in mice infected with RSV. Antiviral nanoparticle-formulated mimics of heparan sulfate proteoglycans were developed and shown to permit strong viral association as well as inhibition of a range of viruses on in vitro and in vivo models of infection." @default.
- W2779102422 created "2018-01-05" @default.
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- W2779102422 date "2017-12-18" @default.
- W2779102422 modified "2023-10-15" @default.
- W2779102422 title "Broad-spectrum non-toxic antiviral nanoparticles with a virucidal inhibition mechanism" @default.
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- W2779102422 doi "https://doi.org/10.1038/nmat5053" @default.
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