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2020 ; 180
(ä): 104860
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The influence of interferon-lambda on restricting Middle East Respiratory
Syndrome Coronavirus replication in the respiratory epithelium
#MMPMID32565134
Jeon YJ
; Gil CH
; Jo A
; Won J
; Kim S
; Kim HJ
Antiviral Res
2020[Aug]; 180
(ä): 104860
PMID32565134
show ga
Middle East Respiratory Syndrome Coronavirus (MERS-CoV) causes severe respiratory
in human with high mortality and it has been a challenge to determine optimum
treatment for MERS-CoV-induced respiratory infection. Here, we observed the
distribution of MERS-CoV receptors using human respiratory mucosa and also
evaluated the contribution of interferon-lambdas (IFN-?s) in response to MERS-CoV
infection using in vitro normal human nasal epithelial (NHNE) and bronchial
epithelial (NHBE) cells. We found that the gene and protein expression of DPPIV,
MERS-CoV receptor, were more dominantly located in nasal and bronchial epithelium
although human nasal mucosa exhibited relatively lower DPPIV expression than lung
parenchymal tissues. The quantitative mRNA level of the MERS-CoV envelope (upE)
gene was significantly induced in MERS-CoV-infected cultured NHNE and NHBE cells
until 3 days after infection. The induction of IFNs was identified in NHNE and
NHBE cells after MERS-CoV infection and IFN-?s were predominantly increased in
MERS-CoV-infected respiratory epithelial cells. Inoculation of IFN-?s to NHNE and
NHBE cells suppressed MERS-CoV replication and in particular, IFN-?(4) showed a
strong therapeutic effect in reducing MERS-CoV infection with higher induction of
IFN-stimulated genes. Thus, IFN-? has a decisive function in the respiratory
epithelium that greatly limits MERS-CoV replication, and may be a key cytokine
for better therapeutic outcomes against MERS-CoV infection in respiratory tract.