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Adenovirus Type 37 Uses Sialic Acid as a Cellular Receptor
Open accessAbstract
Two cellular receptors for adenovirus, coxsackievirus-adenovirus receptor (CAR) and major histocompatibility complex class I (MHC-I) α2, have recently been identified. In the absence of CAR, MHC-I α2 has been suggested to serve as a cellular attachment protein for subgenus C adenoviruses, while members from all subgenera except subgenus B have been shown to interact with CAR. We have found that adenovirus type 37 (Ad37) attachment to CAR-expressing CHO cells was no better than that to CHO cells lacking CAR expression, suggesting that CAR is not used by Ad37 during attachment. Instead, we have identified sialic acid as a third adenovirus receptor moiety. First, Ad37 attachment to both CAR-expresing CHO cells and MHC-I α2-expressing Daudi cells was sensitive to neuraminidase treatment, which eliminates sialic acid on the cell surface. Second, Ad37 attachment to sialic acid-expressing Pro-5 cells was more than 10-fold stronger than that to the Pro-5 subline Lec2, which is deficient in sialic acid expression. Third, neuraminidase treatment of A549 cells caused a 60% decrease in Ad37 replication in a fluorescent-focus assay. Moreover, the receptor sialoconjugate is most probably a glycoprotein rather than a ganglioside, since Ad37 attachment to sialic acid-expressing Pro-5 cells was sensitive to protease treatment. Ad37 attachment to Pro-5 cells occurs via α(2→3)-linked sialic acid saccharides rather than α(2→6)-linked ones, since (i) α(2→3)-specific but not α(2→6)-specific lectins blocked Ad37 attachment to Pro-5 cells and (ii) pretreatment of Pro-5 cells with α(2→3)-specific neuraminidase resulted in decreased Ad37 binding. Taken together, these results suggest that, unlike Ad5, Ad37 makes use of α(2→3)-linked sialic acid saccharides on glycoproteins for entry instead of using CAR or MHC-I α2.
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Cites
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Cited by
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Adenovirus vector-based vaccine for infectious diseases
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Metadata
- Authors
- Arnberg, N., Edlund, K., Kidd, A. H., & Wadell, G.
- Venue
- Journal of Virology
- Publisher
- American Society for Microbiology
- Published
- 2000-01
- Volume
- 74
- Issue
- 1
- Pages
- 42-48
- ISSN
- 0022-538X (ISSN-L)
- 1098-5514
- OpenAlex
- W2153792353
- Cited by
- 316
- References
- 44
- FWCI
- 10.95
- Type
- journal article
- Language
- en
- Open access
- green
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