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Influenza Virus Infections in Polarized Cells

by 1,2,3 and 1,2,3,4,*
MU Center for Influenza and Emerging Infectious Diseases, University of Missouri, Columbia, MO 65211, USA
Department of Molecular Microbiology and Immunology, School of Medicine, University of Missouri, 1201 Rollins St., Columbia, MO 65211, USA
Bond Life Sciences Center, University of Missouri, 1201 Rollins St., Columbia, MO 65211, USA
Department of Electrical Engineering & Computer Science, College of Engineering, University of Missouri, 1201 Rollins St., Columbia, MO 65211, USA
Author to whom correspondence should be addressed.
Academic Editor: Angela Pearson
Viruses 2022, 14(6), 1307;
Received: 18 February 2022 / Revised: 9 June 2022 / Accepted: 11 June 2022 / Published: 15 June 2022
(This article belongs to the Special Issue Viral Infection of Polarized Cells)
In humans and other mammals, the respiratory tract is represented by a complex network of polarized epithelial cells, forming an apical surface facing the external environment and a basal surface attached to the basement layer. These cells are characterized by differential expression of proteins and glycans, which serve as receptors during influenza virus infection. Attachment between these host receptors and the viral surface glycoprotein hemagglutinin (HA) initiates the influenza virus life cycle. However, the virus receptor binding specificities may not be static. Sialylated N-glycans are the most well-characterized receptors but are not essential for the entry of influenza viruses, and other molecules, such as O-glycans and non-sialylated glycans, may be involved in virus-cell attachment. Furthermore, correct cell polarity and directional trafficking of molecules are essential for the orderly development of the system and affect successful influenza infection; on the other hand, influenza infection can also change cell polarity. Here we review recent advances in our understanding of influenza virus infection in the respiratory tract of humans and other mammals, particularly the attachment between the virus and the surface of the polar cells and the polarity variation of these cells due to virus infection. View Full-Text
Keywords: influenza A virus; polarized cell; sialic acid; N-glycan; O-glycan influenza A virus; polarized cell; sialic acid; N-glycan; O-glycan
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MDPI and ACS Style

Praena, B.; Wan, X.-F. Influenza Virus Infections in Polarized Cells. Viruses 2022, 14, 1307.

AMA Style

Praena B, Wan X-F. Influenza Virus Infections in Polarized Cells. Viruses. 2022; 14(6):1307.

Chicago/Turabian Style

Praena, Beatriz, and Xiu-Feng Wan. 2022. "Influenza Virus Infections in Polarized Cells" Viruses 14, no. 6: 1307.

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