tetano
Editor, Senior Moderator
Virus Res. 2015 May 19. pii: S0168-1702(15)00179-3. doi: 10.1016/j.virusres.2015.05.008. [Epub ahead of print]
[h=1]Distinct kinetics and pathways of apoptosis in influenza A and B virus infection.[/h] Santos LA[SUP]1[/SUP], Sol? S[SUP]2[/SUP], Rodrigues CM[SUP]2[/SUP], Rebelo-de-Andrade H[SUP]3[/SUP].
[h=3]Author information[/h]
[h=3]Abstract[/h] Annual influenza epidemics are associated with high incidence and mortality rates, and are an important cause of work absenteeism and productivity losses. For successful replication, influenza viruses have evolved as to counteract and/or take a part on host defense mechanisms. Manipulation of apoptosis is one of such mechanisms that have been subject of attention, particularly in relation to influenza type A viruses over the past years. However, this knowledge has not been extended to include influenza type B viruses. In this study, MDCK-SIAT1 cells were infected with influenza A and B strains and the kinetics and pathways of apoptosis post infection were studied, through LDH measurements, Hoechst dye staining, caspase activity assays and protein expression analysis. The resulting data points to a difference in induction of apoptosis profiles between influenza A and B strains. While influenza A strain induced apoptosis later in the course of infection and mainly by the intrinsic pathway, influenza B strain induced apoptosis early in infection by both intrinsic and extrinsic pathways. Also, data revealed the IκB/NF-κB pathway as the major contributor for the observed differences. The study of the virus-host interactions, particularly those that could have an impact on viral replication, are essential in both influenza A and B viruses, as they will allow the identification of viral/host targets common to both influenza types, which could affect viral replication. This information may prove useful for vaccine and antiviral research.
Copyright ? 2015. Published by Elsevier B.V.
[h=4]KEYWORDS:[/h] Apoptosis; Influenza A and B; IκB/NF-κB pathway; PI3K/Akt pathway
PMID: 26002021 [PubMed - as supplied by publisher]
[h=1]Distinct kinetics and pathways of apoptosis in influenza A and B virus infection.[/h] Santos LA[SUP]1[/SUP], Sol? S[SUP]2[/SUP], Rodrigues CM[SUP]2[/SUP], Rebelo-de-Andrade H[SUP]3[/SUP].
[h=3]Author information[/h]
[h=3]Abstract[/h] Annual influenza epidemics are associated with high incidence and mortality rates, and are an important cause of work absenteeism and productivity losses. For successful replication, influenza viruses have evolved as to counteract and/or take a part on host defense mechanisms. Manipulation of apoptosis is one of such mechanisms that have been subject of attention, particularly in relation to influenza type A viruses over the past years. However, this knowledge has not been extended to include influenza type B viruses. In this study, MDCK-SIAT1 cells were infected with influenza A and B strains and the kinetics and pathways of apoptosis post infection were studied, through LDH measurements, Hoechst dye staining, caspase activity assays and protein expression analysis. The resulting data points to a difference in induction of apoptosis profiles between influenza A and B strains. While influenza A strain induced apoptosis later in the course of infection and mainly by the intrinsic pathway, influenza B strain induced apoptosis early in infection by both intrinsic and extrinsic pathways. Also, data revealed the IκB/NF-κB pathway as the major contributor for the observed differences. The study of the virus-host interactions, particularly those that could have an impact on viral replication, are essential in both influenza A and B viruses, as they will allow the identification of viral/host targets common to both influenza types, which could affect viral replication. This information may prove useful for vaccine and antiviral research.
Copyright ? 2015. Published by Elsevier B.V.
[h=4]KEYWORDS:[/h] Apoptosis; Influenza A and B; IκB/NF-κB pathway; PI3K/Akt pathway
PMID: 26002021 [PubMed - as supplied by publisher]