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Deprecated: Implicit conversion from float 265.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 J+Gen+Virol 2015 ; 96 (8): 2086-2091 Nephropedia Template TP
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The C terminus of NS1 protein of influenza A/WSN/1933(H1N1) virus modulates antiviral responses in infected human macrophages and mice #MMPMID25934792
Anastasina M; Schepens B; Soderholm S; Nyman TA; Matikainen S; Saksela K; Saelens X; Kainov DE
J Gen Virol 2015[Aug]; 96 (8): 2086-2091 PMID25934792show ga
Non-structural protein NS1 of influenza A viruses interacts with cellular factors through its N-terminal RNA-binding, middle effector and C-terminal non-structured domains. NS1 attenuates antiviral responses in infected cells and thereby secures efficient virus replication. Some influenza strains express C-terminally truncated NS1 proteins due to nonsense mutations in the NS1 gene. To understand the role of the NS1 C-terminal region in regulation of antiviral responses, we engineered influenza viruses expressing C-terminally truncated NS1 proteins using A/WSN/33(H1N1) reverse genetics and tested them in human macrophages and in mice. We showed that a WSN virus expressing NS1 with a 28 aa deletion from its C terminus is a more powerful inducer of antiviral responses than the virus expressing full-length NS1, or one with a 10 aa truncation of NS1 in vitro. Thus, our findings suggest that the C-terminal region of NS1 is essential for regulation of antiviral responses. Moreover, viruses expressing truncated NS1 proteins could be good vaccine candidates.
|Amino Acid Motifs[MESH]
|Animals[MESH]
|Female[MESH]
|Humans[MESH]
|Influenza A Virus, H1N1 Subtype/genetics/*immunology/physiology[MESH]