The Sialic Acid Binding Activity of Human Parainfluenza Virus 3 and Mumps Virus Glycoproteins Enhances the Adherence of Group B Streptococci to HEp-2 Cells

Frontiers in Cellular and Infection Microbiology
Jie TongGeorg Herrler

Abstract

In the complex microenvironment of the human respiratory tract, different kinds of microorganisms may synergistically interact with each other resulting in viral-bacterial co-infections that are often associated with more severe diseases than the respective mono-infections. Human respiratory paramyxoviruses, for example parainfluenza virus type 3 (HPIV3), are common causes of respiratory diseases both in infants and a subset of adults. HPIV3 recognizes sialic acid (SA)-containing receptors on host cells. In contrast to human influenza viruses which have a preference for α2,6-linked sialic acid, HPIV3 preferentially recognize α2,3-linked sialic acids. Group B streptococci (GBS) are colonizers in the human respiratory tract. They contain a capsular polysaccharide with terminal sialic acid residues in an α2,3-linkage. In the present study, we report that HPIV3 can recognize the α2,3-linked sialic acids present on GBS. The interaction was evident not only by the binding of virions to GBS in a co-sedimentation assay, but also in the GBS binding to HPIV3-infected cells. While co-infection by GBS and HPIV3 had a delaying effect on the virus replication, it enhanced GBS adherence to virus-infected cells. To show that other human paramy...Continue Reading

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Citations

Feb 23, 2020·Pediatric Pulmonology·Giovanni A RossiAndrew A Colin
Sep 26, 2020·Frontiers in Immunology·Hanaa Ahmed-HassanNamal P M Liyanage
Aug 10, 2020·IUBMB Life·Rasoul MirzaeiSajad Karampoor

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Methods Mentioned

BETA
FCS
transfection
fluorescence microscopy

Software Mentioned

GraphPad Prism
GraphPad

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