Chemoenzymatic synthesis, characterization, and application of glycopolymers carrying lactosamine repeats as entry inhibitors against influenza virus infection
Identifieur interne : 001300 ( Main/Exploration ); précédent : 001299; suivant : 001301Chemoenzymatic synthesis, characterization, and application of glycopolymers carrying lactosamine repeats as entry inhibitors against influenza virus infection
Auteurs : Kazuya I P J. Hidari [Japon] ; Takeomi Murata ; Kazuhiro Yoshida ; Yoshiharu Takahashi ; Yo-Hei Minamijima ; Yoshinobu Miwa ; Satoshi Adachi ; Makoto Ogata ; Taiichi Usui ; Yasuo Suzuki [Japon] ; Takashi SuzukiSource :
- Glycobiology [ 0959-6658 ] ; 2008.
Abstract
To control interspecies transmission of influenza viruses, it is essential to elucidate the molecular mechanisms of the interaction of influenza viruses with sialo-glycoconjugate receptors expressed on different host cells. Competitive inhibitors containing mimetic receptor carbohydrates that prevent virus entry may be useful tools to address such issues. We chemoenzymatically synthesized and characterized the glycopolymers that were carrying terminal 2,6-sialic acid on lactosamine repeats as influenza virus inhibitors. In vitro and in vivo infection experiments using these glycopolymers demonstrated marked differences in inhibitory activity against different species of viruses. Human viruses, including clinically isolated strains, were consistently inhibited by glycopolymers carrying lactosamine repeats with higher activity than those containing a single lactosamine. A swine virus also showed the same recognition properties as those from human hosts. In contrast, avian and equine viruses were not inhibited by any of the glycopolymers examined carrying single, tandem, or triplet lactosamine repeats. Hemagglutination inhibition and solid-phase binding analyses indicated that binding affinity of glycopolymers with influenza viruses contributes dominantly to the inhibitory activity against viral infection. Sequence analysis and molecular modeling of human viruses indicated that specific amino acid substitutions on hemagglutinin may affect binding affinity of glycopolymers carrying lactosamine repeats with viruses. In conclusion, glycopolymers carrying lactosamine repeats of different lengths are useful to define molecular mechanisms of virus recognition. The core carbohydrate portion as well as sialyl linkages on the receptor glycoconjugate may affect host cell recognition of human and swine viruses.
Url:
DOI: 10.1093/glycob/cwn067
Affiliations:
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Competitive inhibitors containing mimetic receptor carbohydrates that prevent virus entry may be useful tools to address such issues. We chemoenzymatically synthesized and characterized the glycopolymers that were carrying terminal 2,6-sialic acid on lactosamine repeats as influenza virus inhibitors. In vitro and in vivo infection experiments using these glycopolymers demonstrated marked differences in inhibitory activity against different species of viruses. Human viruses, including clinically isolated strains, were consistently inhibited by glycopolymers carrying lactosamine repeats with higher activity than those containing a single lactosamine. A swine virus also showed the same recognition properties as those from human hosts. In contrast, avian and equine viruses were not inhibited by any of the glycopolymers examined carrying single, tandem, or triplet lactosamine repeats. Hemagglutination inhibition and solid-phase binding analyses indicated that binding affinity of glycopolymers with influenza viruses contributes dominantly to the inhibitory activity against viral infection. Sequence analysis and molecular modeling of human viruses indicated that specific amino acid substitutions on hemagglutinin may affect binding affinity of glycopolymers carrying lactosamine repeats with viruses. In conclusion, glycopolymers carrying lactosamine repeats of different lengths are useful to define molecular mechanisms of virus recognition. 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Hidari</name></noRegion><name sortKey="Suzuki, Yasuo" sort="Suzuki, Yasuo" uniqKey="Suzuki Y" first="Yasuo" last="Suzuki">Yasuo Suzuki</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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