Endocytic function is critical for influenza A virus infection via DC-SIGN and L-SIGN
AuthorGillespie, L; Roosendahl, P; Ng, WC; Brooks, AG; Reading, PC; Londrigan, SL
Source TitleScientific Reports
PublisherNATURE PUBLISHING GROUP
University of Melbourne Author/sReading, Patrick; Londrigan, Sarah; Brooks, Andrew; Gillespie, Leah; ROOSENDAHL, PAULA; Ng, Wei Yi
AffiliationMicrobiology and Immunology
Document TypeJournal Article
CitationsGillespie, L., Roosendahl, P., Ng, W. C., Brooks, A. G., Reading, P. C. & Londrigan, S. L. (2016). Endocytic function is critical for influenza A virus infection via DC-SIGN and L-SIGN. SCIENTIFIC REPORTS, 6 (1), https://doi.org/10.1038/srep19428.
Access StatusOpen Access
NHMRC Grant codeNHMRC/1027545
The ubiquitous presence of cell-surface sialic acid (SIA) has complicated efforts to identify specific transmembrane glycoproteins that function as bone fide entry receptors for influenza A virus (IAV) infection. The C-type lectin receptors (CLRs) DC-SIGN (CD209) and L-SIGN (CD209L) enhance IAV infection however it is not known if they act as attachment factors, passing virions to other unknown receptors for virus entry, or as authentic entry receptors for CLR-mediated virus uptake and infection. Sialic acid-deficient Lec2 Chinese Hamster Ovary (CHO) cell lines were resistant to IAV infection whereas expression of DC-SIGN/L-SIGN restored susceptibility of Lec2 cells to pH- and dynamin-dependent infection. Moreover, Lec2 cells expressing endocytosis-defective DC-SIGN/L-SIGN retained capacity to bind IAV but showed reduced susceptibility to infection. These studies confirm that DC-SIGN and L-SIGN are authentic endocytic receptors for IAV entry and infection.
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