tetano
Editor, Senior Moderator
Vaccine. 2013 Aug 20. pii: S0264-410X(13)01117-1. doi: 10.1016/j.vaccine.2013.08.026. [Epub ahead of print]
Improving influenza virus backbones by including terminal regions of MDCK-adapted strains on hemagglutinin and neuraminidase gene segments.
Gomila RC, Suphaphiphat P, Judge C, Spencer T, Ferrari A, Wen Y, Palladino G, Dormitzer PR, Mason PW.
Source
Novartis Vaccines and Diagnostics, 45 Sidney Street, Cambridge, MA 02139, United States. Electronic address: Raul.Gomila@novartis.com.
Abstract
Reverse genetics approaches can simplify and accelerate the process of vaccine manufacturing by combining the desired genome segments encoding the surface glycoproteins from influenza strains with genome segments (backbone segments) encoding internal and non-structural proteins from high-growth strains. We have developed three optimized high-growth backbones for use in producing vaccine seed viruses for group A influenza strains. Here we show that we can further enhance the productivity of our three optimized backbones by using chimeric hemagglutinin (HA) and neuraminidase (NA) genome segments containing terminal regions (non-coding regions (NCRs) and coding regions for the signal peptide (SP), transmembrane domain (TMD), and cytoplasmic domain (CT)) from two MDCK-adapted high growth strains (PR8x and Hes) and the sequences encoding the ectodomains of the A/Brisbane/10/10 (H1N1) HA and NA proteins. Viruses in which both the HA and NA genome segments had the high-growth terminal regions produced higher HA yields than viruses that contained one WT and one chimeric HA or NA genome segment. Studies on our best-performing backbone indicated that the increases in HA yield were also reflected in an increase in HA content in partially purified preparations. Our results show that using chimeric HA and NA segments with high-growth backbones are a viable strategy that could improve influenza vaccine manufacturing. Possible mechanisms for the enhancement of HA yield are discussed.
Copyright ? 2013. Published by Elsevier Ltd.
KEYWORDS:
Chimeras, Hemagglutinin, Influenza, Reverse genetics, Vaccine seeds
PMID:
23973324
[PubMed - as supplied by publisher]
http://www.ncbi.nlm.nih.gov/pubmed/23973324
Improving influenza virus backbones by including terminal regions of MDCK-adapted strains on hemagglutinin and neuraminidase gene segments.
Gomila RC, Suphaphiphat P, Judge C, Spencer T, Ferrari A, Wen Y, Palladino G, Dormitzer PR, Mason PW.
Source
Novartis Vaccines and Diagnostics, 45 Sidney Street, Cambridge, MA 02139, United States. Electronic address: Raul.Gomila@novartis.com.
Abstract
Reverse genetics approaches can simplify and accelerate the process of vaccine manufacturing by combining the desired genome segments encoding the surface glycoproteins from influenza strains with genome segments (backbone segments) encoding internal and non-structural proteins from high-growth strains. We have developed three optimized high-growth backbones for use in producing vaccine seed viruses for group A influenza strains. Here we show that we can further enhance the productivity of our three optimized backbones by using chimeric hemagglutinin (HA) and neuraminidase (NA) genome segments containing terminal regions (non-coding regions (NCRs) and coding regions for the signal peptide (SP), transmembrane domain (TMD), and cytoplasmic domain (CT)) from two MDCK-adapted high growth strains (PR8x and Hes) and the sequences encoding the ectodomains of the A/Brisbane/10/10 (H1N1) HA and NA proteins. Viruses in which both the HA and NA genome segments had the high-growth terminal regions produced higher HA yields than viruses that contained one WT and one chimeric HA or NA genome segment. Studies on our best-performing backbone indicated that the increases in HA yield were also reflected in an increase in HA content in partially purified preparations. Our results show that using chimeric HA and NA segments with high-growth backbones are a viable strategy that could improve influenza vaccine manufacturing. Possible mechanisms for the enhancement of HA yield are discussed.
Copyright ? 2013. Published by Elsevier Ltd.
KEYWORDS:
Chimeras, Hemagglutinin, Influenza, Reverse genetics, Vaccine seeds
PMID:
23973324
[PubMed - as supplied by publisher]
http://www.ncbi.nlm.nih.gov/pubmed/23973324