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Identification of Chicken CD74 as a Novel Cellular Attachment Receptor for Infectious Bursal Disease Virus in Bursa B Lymphocytes.

Authors :
Aijing Liu
Qing Pan
Yue Li
Nana Yan
Jing Wang
Bo Yang
Zehua Chen
Xiaole Qi
Yulong Gao
Li Gao
Changjun Liu
Yanping Zhang
Hongyu Cui
Kai Li
Yongqiang Wang
Xiaomei Wang
Source :
Journal of Virology. 1/15/2020, Vol. 94 Issue 2, p1-14. 14p.
Publication Year :
2020

Abstract

Infectious bursal disease virus (IBDV) is an important member of the Birnaviridae family, causing severe immunosuppressive disease in chickens. The major capsid protein VP2 is responsible for the binding of IBDV to the host cell and its cellular tropism. In order to find proteins that potentially interact with IBDV VP2, a liquid chromatography-mass spectrometry (LC-MS) assay was conducted, and the host chicken CD74 protein was identified. Here, we investigate the role of chicken CD74 in IBDV attachment. Coimmunoprecipitation assays indicated that the extracellular domain of CD74 interacted with the VP2 proteins of multiple IBDV strains. Knockdown and overexpression experiments showed that CD74 promotes viral infectivity. Confocal assays showed that CD74 overexpression allows the attachment of IBDV and subvirus-like particles (SVPs) to the cell surface of nonpermissive cells, and quantitative PCR (qPCR) analysis further confirmed the attachment function of CD74. Anti-CD74 antibody, soluble CD74, depletion of CD74 by small interfering RNA (siRNA), and CD74 knockdown in the IBDV-susceptible DT40 cell line significantly inhibited IBDV binding, suggesting a pivotal role of this protein in virus attachment. These findings demonstrate that CD74 is a novel important receptor for IBDV attachment to the chicken B lymphocyte cell line DT40. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
0022538X
Volume :
94
Issue :
2
Database :
Academic Search Index
Journal :
Journal of Virology
Publication Type :
Academic Journal
Accession number :
141186720
Full Text :
https://doi.org/10.1128/JVI.01712-19