Bacterial lipopolysaccharide binding enhances virion stability and promotes environmental fitness of an enteric virus.

Bacterial lipopolysaccharide binding enhances virion stability and promotes environmental fitness of an enteric virus.
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DOI:
10.1016/j.chom.2013.12.004
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发表时间:
2014-01-15
影响因子:
30.3
通讯作者:
Pfeiffer JK
Pfeiffer JK
中科院分区:
医学1区
文献类型:
--
作者:
Robinson CM;Jesudhasan PR;Pfeiffer JK

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Enteric viruses, including poliovirus and reovirus, encounter a vast microbial community in the mammalian gastrointestinal tract, which has been shown to promote virus replication and pathogenesis. Investigating the underlying mechanisms, we find that poliovirus binds bacterial surface polysaccharides, which enhances virion stability and cell attachment by increasing binding to the viral receptor. Additionally, we identified a poliovirus mutant, VP1-T99K, with reduced lipopolysaccharide (LPS) binding. Although T99K and WT poliovirus cell attachment, replication and pathogenesis in mice are equivalent, following peroral inoculation of mice, VP1-T99K poliovirus was unstable in feces. Consequently, the ratio of mutant virus in feces is reduced following additional cycles of infection in mice. Thus, the mutant virus incurs a fitness cost when environmental stability is a factor. These data suggest that poliovirus binds bacterial surface polysaccharides, enhancing cell attachment and environmental stability, potentially promoting transmission to a new host.
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