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2012 ; 7
(9
): e45842
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Lack of innate interferon responses during SARS coronavirus infection in a
vaccination and reinfection ferret model
#MMPMID23029269
Cameron MJ
; Kelvin AA
; Leon AJ
; Cameron CM
; Ran L
; Xu L
; Chu YK
; Danesh A
; Fang Y
; Li Q
; Anderson A
; Couch RC
; Paquette SG
; Fomukong NG
; Kistner O
; Lauchart M
; Rowe T
; Harrod KS
; Jonsson CB
; Kelvin DJ
PLoS One
2012[]; 7
(9
): e45842
PMID23029269
show ga
In terms of its highly pathogenic nature, there remains a significant need to
further define the immune pathology of SARS-coronavirus (SARS-CoV) infection, as
well as identify correlates of immunity to help develop vaccines for severe
coronaviral infections. Here we use a SARS-CoV infection-reinfection ferret model
and a functional genomics approach to gain insight into SARS immunopathogenesis
and to identify correlates of immune protection during SARS-CoV-challenge in
ferrets previously infected with SARS-CoV or immunized with a SARS virus vaccine.
We identified gene expression signatures in the lungs of ferrets associated with
primary immune responses to SARS-CoV infection and in ferrets that received an
identical second inoculum. Acute SARS-CoV infection prompted coordinated innate
immune responses that were dominated by antiviral IFN response gene (IRG)
expression. Reinfected ferrets, however, lacked the integrated expression of IRGs
that was prevalent during acute infection. The expression of specific IRGs was
also absent upon challenge in ferrets immunized with an inactivated,
Al(OH)(3)-adjuvanted whole virus SARS vaccine candidate that protected them
against SARS-CoV infection in the lungs. Lack of IFN-mediated immune enhancement
in infected ferrets that were previously inoculated with, or vaccinated against,
SARS-CoV revealed 9 IRG correlates of protective immunity. This data provides
insight into the molecular pathogenesis of SARS-CoV and SARS-like-CoV infections
and is an important resource for the development of CoV antiviral therapeutics
and vaccines.
|*Immunity, Innate
[MESH]
|*Vaccination
[MESH]
|Animals
[MESH]
|Antibodies, Viral/blood
[MESH]
|Chlorocebus aethiops
[MESH]
|Complement System Proteins/genetics/metabolism
[MESH]
|Ferrets
[MESH]
|Gene Expression Regulation
[MESH]
|Host-Pathogen Interactions
[MESH]
|Interferons/genetics/*metabolism
[MESH]
|Interleukin-6/genetics/metabolism
[MESH]
|Lung/*metabolism/virology
[MESH]
|Male
[MESH]
|Oligonucleotide Array Sequence Analysis
[MESH]
|Severe Acute Respiratory Syndrome/*immunology/metabolism/prevention & control
[MESH]