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. 1988 Feb;62(2):545–551. doi: 10.1128/jvi.62.2.545-551.1988

Uptake of reovirus serotype 1 by the lungs from the bloodstream is mediated by the viral hemagglutinin.

E M Verdin 1, S P Lynn 1, B N Fields 1, E Maratos-Flier 1
PMCID: PMC250566  PMID: 3336070

Abstract

We used the mammalian reoviruses to determine the molecular basis of the clearance of a virus from the bloodstream by specific organs. Reovirus serotypes 1 (T1) and 3 (T3) were radiolabeled with [35S]methionine or 125I, and the viruses were injected intravenously into weanling rats. The distribution of radioactivity within the animals was determined at various times after the injection. Both viruses were cleared rapidly from the bloodstream and concentrated in different organs. Reovirus T1 was found predominantly in the lungs and liver, whereas T3 was found predominantly in the liver, with very little virus in the lungs. Using intertypic reassortants, we determined that the T1 S1 gene, which encodes the viral hemagglutinin (sigma 1 protein), is responsible for the difference in uptake of T1 and T3 by the lungs. The genetic mapping was extended by using several approaches. (i) T1 subjected to limited proteolytic digestion with chymotrypsin was cleared efficiently by the lungs despite the removal of sigma 3 and digestion of mu 1C to delta. (ii) Uptake of T1 by the lungs was totally inhibited by incubation of T1 with an anti-sigma 1 monoclonal antibody or its Fab fragment before injection. (iii) A reovirus T1 variant in the sigma 1 protein was poorly taken up by the lungs. These data indicate that clearance of reovirus from the bloodstream by the lungs is dependent on the presence of the T1 sigma 1 protein.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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