Host factors for influenza virus replication
Virology & Mycology

Virology & Mycology
Open Access

ISSN: 2161-0517

Host factors for influenza virus replication

International Conference on Flu

June 08-10, 2015 Chicago, USA

Michael M C Lai

ScientificTracksAbstracts-Workshop: Virol-mycol

Abstract :

Influenza is a growing global concern threatening human health worldwide. Its prevention is compromised by the rapid evolution of the virus and lack of a universal vaccine. The effectiveness of influenza treatment is also limited by the scarcity of good antiviral agents and emergence of resistant viral strains. Host factors required for influenza virus replication may provide alternative targets for antiviral or anti-influenza agents. To this end, we performed several rounds of pooled genomic RNAi screening to identify host factors involved in influenza virus infection, replication and pathogenesis. Besides the previously reported factors involved in virus entry, we identified additional factors involved in other viral replication steps, including a E3 ubiquitin ligase ITCH, which is required for virus uncoating (the release of viral RNP from the endosome during virus entry). This protein is incorporated into endosome together with incoming virion, and ubiquitinates viral M1 matrix protein, thereby releasing viral RNA into cytosol and the nucleus. Several RNA-binding proteins involved in RNA transcription and/ or replication have also been identified. Interestingly, several of these proteins are also ubiquitin ligases and interact with viral RNA polymerases. Surprisingly, several specific cell surface membrane proteins are also required for virus entry, suggesting that the binding of virion to sialic acid residue alone is not sufficient to trigger virus entry. They may be involved in the virus internalization steps. The detection and characterization of these factors give new insights into the mechanism of viral replication and provide potential new targets for antiviral drugs.

Biography :

Michael M C Lai is a Chair Professor in China Medical University, Taiwan. He received his MD Degree in 1968 from National Taiwan University College of Medicine, Taiwan. Afterwards he completed his PhD in Molecular Biology in 1973 from University of California, Berkeley, California. He spent most of his academic career at University of Southern California School of Medicine, Los Angeles, California as a Faculty Member, culminating in his appointment as a Distinguished Professor in 2003. He later assumed various responsible positions in Taiwan, including Vice President, Academia Sinica (2003-2006) and President, National Cheng Kung University (2007-2011). His research covered coronavirus, hepatitis C and D viruses and more recently influenza virus. His profile is credited with a number of highly prestigious awards including Lifetime Achievement Award, Society of Chinese Bioscientists in America (2009), Lifetime Achievement Award, University of Southern California (2008), Presidential Science Prize, Republic of China (2013) and appointment as a Howard Hughes Medical Institute Investigator (1990-2003) and was elected as an Academician of Academia Sinica in 1992. He is also a fellow of American Academy of Microbiology and a Fellow of Third World Academy of Science.