The results of the study show that the homologous recombination can
drive mammal influenza A virus evolution, and might result in
potential change of virus virulence and host tropism.
Dynamic gene mutation and the reassortment of genes have been considered as the key factors responsible
for influenza A virus virulence and host tropism change. This study reports several significant evidence
demonstrating that homologous recombination also takes place between influenza A viruses in human and
swine lineages. Moreover, in a mosaic descended from swine H1N1 subtype and human H2N2, we found that
its minor putative parent might be a derivative from the human cold-adapted vaccine lineage, which
suggests that live vaccine is capable of playing a role in genetic change of influenza A virus via recombination
with circulating viruses. These results would be important for knowing the molecular mechanism of
mammal influenza A virus heredity and evolution.
In conclusion, our study provided powerful evidence that intragenic
recombination occurs in mammalian influenza A viruses from
different species, which shows that homologous recombination may
play a role in driving the evolution of mammalian influenza A viruses
and has the potential to change their virulence and host tropism.
Finally, our results suggest that live vaccine is capable of speeding up
viral evolution via recombination with circulating viruses.
http://img222.imageshack.us/img222/5756/46693411.png
http://img442.imageshack.us/img442/455/45078628.png
http://img442.imageshack.us/img442/4999/38772350.png
http://img442.imageshack.us/img442/4170/44416516.png
http://img52.imageshack.us/img52/7900/73134820.png
http://img52.imageshack.us/img52/2347/49999424.png
http://img52.imageshack.us/img52/7920/57713139.png
http://img52.imageshack.us/img52/6663/456c.png
http://img526.imageshack.us/img526/859/13927536.png
http://img526.imageshack.us/img526/8053/22524872.png
http://img693.imageshack.us/img693/6666/74236150.png
http://img693.imageshack.us/img693/9353/36656602.png
http://img693.imageshack.us/img693/2176/37384518.png
http://img693.imageshack.us/img693/9573/76512237.png
http://img693.imageshack.us/img693/1259/54263312.png
http://img693.imageshack.us/img693/8317/13916110.png
drive mammal influenza A virus evolution, and might result in
potential change of virus virulence and host tropism.
Dynamic gene mutation and the reassortment of genes have been considered as the key factors responsible
for influenza A virus virulence and host tropism change. This study reports several significant evidence
demonstrating that homologous recombination also takes place between influenza A viruses in human and
swine lineages. Moreover, in a mosaic descended from swine H1N1 subtype and human H2N2, we found that
its minor putative parent might be a derivative from the human cold-adapted vaccine lineage, which
suggests that live vaccine is capable of playing a role in genetic change of influenza A virus via recombination
with circulating viruses. These results would be important for knowing the molecular mechanism of
mammal influenza A virus heredity and evolution.
In conclusion, our study provided powerful evidence that intragenic
recombination occurs in mammalian influenza A viruses from
different species, which shows that homologous recombination may
play a role in driving the evolution of mammalian influenza A viruses
and has the potential to change their virulence and host tropism.
Finally, our results suggest that live vaccine is capable of speeding up
viral evolution via recombination with circulating viruses.
http://img222.imageshack.us/img222/5756/46693411.png
http://img442.imageshack.us/img442/455/45078628.png
http://img442.imageshack.us/img442/4999/38772350.png
http://img442.imageshack.us/img442/4170/44416516.png
http://img52.imageshack.us/img52/7900/73134820.png
http://img52.imageshack.us/img52/2347/49999424.png
http://img52.imageshack.us/img52/7920/57713139.png
http://img52.imageshack.us/img52/6663/456c.png
http://img526.imageshack.us/img526/859/13927536.png
http://img526.imageshack.us/img526/8053/22524872.png
http://img693.imageshack.us/img693/6666/74236150.png
http://img693.imageshack.us/img693/9353/36656602.png
http://img693.imageshack.us/img693/2176/37384518.png
http://img693.imageshack.us/img693/9573/76512237.png
http://img693.imageshack.us/img693/1259/54263312.png
http://img693.imageshack.us/img693/8317/13916110.png