Abstract：
:An immuno-informatics study was conducted to determine possible pre-existing T cellular immunity to the recently emerged swine-origin triple reassortant H3N2 variant (S-OtrH3N2v-2011) which acquired the matrix gene of influenza A (H1N1)pdm09. Given the genetic origin of S-OtrH3N2v-2011, our study focused on the hemagglutinin (HA) and matrix1 (M1) proteins to identify common and conserved T cell epitopes. We compared HA CD4+ T cell epitopes of S-OtrH3N2v-2011 with seasonal H3N2 (1968-2011)-HA proteins. M1 CD4+ and CD8+ T cell epitopes of S-OtrH3N2v-2011 were compared with the M1 proteins of seasonal H1N1 (1977-2009) and A (H1N1)pdm09 (2009-2011) subtypes. The results revealed a high conservancy of epitopes localized particularly on HA2 and the entire M1 protein. The overall cross reactivity of predicted CD4+ T cell epitopes with previously experimentally defined (Immuno Epitope Database) CD4+ T epitopes of HA and M1 proteins was ∼51%. CD8+ T cell cross-reactivity of ∼74% was documented for M1 protein. Analysis suggests possible pre-existing CD4+ T cell immunity to S-OtrH3N2v-2011 in the human population.
journal_name
Vaccinejournal_title
Vaccineauthors
Duvvuri VR,Marchand-Austin A,Eshaghi A,Patel SN,Low DE,Gubbay JBdoi
10.1016/j.vaccine.2012.07.054subject
Has Abstractpub_date
2012-09-14 00:00:00pages
6054-63issue
42eissn
0264-410Xissn
1873-2518pii
S0264-410X(12)01079-1journal_volume
30pub_type
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