Expression of SARS coronavirus 1 spike protein from a herpesviral vector induces innate immune signaling and neutralizing antibody responses

In this study we constructed a herpes simplex virus 1 replication-defective mutant vector expressing SARS-CoV-1 spike protein as a potential vaccine vector and to probe the effects of spike protein on host cells. The spike protein expressed from this vector is functional in that it localizes to the surface of infected cells and induces fusion of ACE2-expressing cells. In immunized mice, the recombinant vector induced antibodies that bind to spike protein in an ELISA assay and that show neutralizing activity. The spike protein expressed from this vector can induce the expression of cytokines in an ACE2-independent, MyD88-dependent process. These results argue that the SARS-CoV-1 spike protein intrinsically activates signaling pathways that induce cytokines and contribute directly to the inflammatory process of SARS.PMID:33930819 | PMC:PMC8058630 | DOI:10.1016/j.virol.2021.04.006

Source: Virology - April 30, 2021 Category: Virology Authors: Evelyn A Kurt-Jones Timothy E Dudek Daisuke Watanabe Leisa Mandell Jenny Che Shenghua Zhou LuCheng Cao Thomas Greenough Gregory J Babcock Fernando Diaz Hyung Suk Oh Changhong Zhou Robert W Finberg David M Knipe Source Type: research