Abstract:
:Mannose binding lectin (MBL) generally plays a protective role during viral infection, yet MBL-mediated complement activation promotes Ross River virus (RRV)-induced inflammatory tissue destruction, contributing to arthritis and myositis. As MBL binds to carbohydrates, we hypothesized that N-linked glycans on the RRV envelope glycoproteins act as ligands for MBL. Using a panel of RRV mutants lacking the envelope N-linked glycans, we found that MBL deposition onto infected cells was dependent on the E2 glycans. Moreover, the glycan-deficient viruses exhibited reduced disease and tissue damage in a mouse model of RRV-induced myositis compared to wild-type RRV, despite similar viral load and inflammatory infiltrates within the skeletal muscle. Instead, the reduced disease induced by glycan-deficient viruses was linked to decreased MBL deposition and complement activation within inflamed tissues. These results demonstrate that the viral N-linked glycans promote MBL deposition and complement activation onto RRV-infected cells, contributing to the development of RRV-induced myositis.
journal_name
Virologyjournal_title
Virologyauthors
Gunn BM,Jones JE,Shabman RS,Whitmore AC,Sarkar S,Blevins LK,Morrison TE,Heise MTdoi
10.1016/j.virol.2017.12.022subject
Has Abstractpub_date
2018-02-01 00:00:00pages
250-260eissn
0042-6822issn
1096-0341pii
S0042-6822(17)30433-6journal_volume
515pub_type
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