T-cell responses in children to internal influenza antigens, 1 year after immunization with pandemic H1N1 influenza vaccine, and response to revaccination with seasonal trivalent-inactivated influenza vaccine.
BACKGROUND: During seasonal influenza epidemics, 5-15% of the population are affected with an illness having a nontrivial mortality, morbidity and economic burden. Inactivated influenza vaccines are routinely used to prevent influenza infection, primarily by inducing humoral immunity. In addition, t...
| Main Authors: | , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
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2012
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| _version_ | 1826267204345135104 |
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| author | Lambe, T Spencer, A Mullarkey, C Antrobus, R Yu, L de Whalley, P Thompson, B Jones, C Chalk, J Kerridge, S Hill, A Snape, MD Pollard, A Gilbert, S |
| author_facet | Lambe, T Spencer, A Mullarkey, C Antrobus, R Yu, L de Whalley, P Thompson, B Jones, C Chalk, J Kerridge, S Hill, A Snape, MD Pollard, A Gilbert, S |
| author_sort | Lambe, T |
| collection | OXFORD |
| description | BACKGROUND: During seasonal influenza epidemics, 5-15% of the population are affected with an illness having a nontrivial mortality, morbidity and economic burden. Inactivated influenza vaccines are routinely used to prevent influenza infection, primarily by inducing humoral immunity. In addition, trivalent-inactivated influenza vaccines have previously been shown to boost influenza-specific T-cell responses in a small percentage of adults. We investigate here the influenza-specific T-cell response, in children, 1 year after pandemic H1N1 vaccination and the ability to boost the T-cell response with trivalent-inactivated influenza immunization. METHODS: Peripheral blood mononuclear cells (PBMCs) were isolated from children previously vaccinated with pandemic H1N1 vaccine, pre- and postseasonal 2010-2011 trivalent influenza vaccine (TIV) vaccination. Samples were analyzed by interferon-gamma enzyme-linked immunosorbent spot for reactogenicity toward internal influenza antigens (nucleoprotein, matrix protein 1 and nonstructural protein 1). RESULTS: Basal ex vivo T-cell responses to nucleoprotein, matrix protein 1 and nonstructural protein 1 measured by interferon-gamma enzyme-linked immunosorbent spot assay were significantly higher in those children who had previously received an AS03B-adjuvanted split virion pandemic vaccine 12 months earlier rather than a nonadjuvanted whole virion vaccine. Boosting of these responses, 21 days after 2010/2011 seasonal TIV vaccination was observed regardless of age or prior pandemic vaccination regime, although boosting was greater in those groups with the lowest initial response. CONCLUSIONS: We show here that children previously vaccinated with the 2009 pandemic H1N1 vaccine have measurable T-cell responses 1 year after vaccination. The magnitudes of these responses are dependent on both age of vaccine and type of pandemic H1N1 vaccine used. After 2010/2011 seasonal TIV vaccination, these T-cell responses undergo a small but significant boost. |
| first_indexed | 2024-03-06T20:50:37Z |
| format | Journal article |
| id | oxford-uuid:376f43bc-c3b5-43c0-8cc1-e6e78b4ea070 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T20:50:37Z |
| publishDate | 2012 |
| record_format | dspace |
| spelling | oxford-uuid:376f43bc-c3b5-43c0-8cc1-e6e78b4ea0702022-03-26T13:44:02ZT-cell responses in children to internal influenza antigens, 1 year after immunization with pandemic H1N1 influenza vaccine, and response to revaccination with seasonal trivalent-inactivated influenza vaccine.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:376f43bc-c3b5-43c0-8cc1-e6e78b4ea070EnglishSymplectic Elements at Oxford2012Lambe, TSpencer, AMullarkey, CAntrobus, RYu, Lde Whalley, PThompson, BJones, CChalk, JKerridge, SHill, ASnape, MDPollard, AGilbert, SBACKGROUND: During seasonal influenza epidemics, 5-15% of the population are affected with an illness having a nontrivial mortality, morbidity and economic burden. Inactivated influenza vaccines are routinely used to prevent influenza infection, primarily by inducing humoral immunity. In addition, trivalent-inactivated influenza vaccines have previously been shown to boost influenza-specific T-cell responses in a small percentage of adults. We investigate here the influenza-specific T-cell response, in children, 1 year after pandemic H1N1 vaccination and the ability to boost the T-cell response with trivalent-inactivated influenza immunization. METHODS: Peripheral blood mononuclear cells (PBMCs) were isolated from children previously vaccinated with pandemic H1N1 vaccine, pre- and postseasonal 2010-2011 trivalent influenza vaccine (TIV) vaccination. Samples were analyzed by interferon-gamma enzyme-linked immunosorbent spot for reactogenicity toward internal influenza antigens (nucleoprotein, matrix protein 1 and nonstructural protein 1). RESULTS: Basal ex vivo T-cell responses to nucleoprotein, matrix protein 1 and nonstructural protein 1 measured by interferon-gamma enzyme-linked immunosorbent spot assay were significantly higher in those children who had previously received an AS03B-adjuvanted split virion pandemic vaccine 12 months earlier rather than a nonadjuvanted whole virion vaccine. Boosting of these responses, 21 days after 2010/2011 seasonal TIV vaccination was observed regardless of age or prior pandemic vaccination regime, although boosting was greater in those groups with the lowest initial response. CONCLUSIONS: We show here that children previously vaccinated with the 2009 pandemic H1N1 vaccine have measurable T-cell responses 1 year after vaccination. The magnitudes of these responses are dependent on both age of vaccine and type of pandemic H1N1 vaccine used. After 2010/2011 seasonal TIV vaccination, these T-cell responses undergo a small but significant boost. |
| spellingShingle | Lambe, T Spencer, A Mullarkey, C Antrobus, R Yu, L de Whalley, P Thompson, B Jones, C Chalk, J Kerridge, S Hill, A Snape, MD Pollard, A Gilbert, S T-cell responses in children to internal influenza antigens, 1 year after immunization with pandemic H1N1 influenza vaccine, and response to revaccination with seasonal trivalent-inactivated influenza vaccine. |
| title | T-cell responses in children to internal influenza antigens, 1 year after immunization with pandemic H1N1 influenza vaccine, and response to revaccination with seasonal trivalent-inactivated influenza vaccine. |
| title_full | T-cell responses in children to internal influenza antigens, 1 year after immunization with pandemic H1N1 influenza vaccine, and response to revaccination with seasonal trivalent-inactivated influenza vaccine. |
| title_fullStr | T-cell responses in children to internal influenza antigens, 1 year after immunization with pandemic H1N1 influenza vaccine, and response to revaccination with seasonal trivalent-inactivated influenza vaccine. |
| title_full_unstemmed | T-cell responses in children to internal influenza antigens, 1 year after immunization with pandemic H1N1 influenza vaccine, and response to revaccination with seasonal trivalent-inactivated influenza vaccine. |
| title_short | T-cell responses in children to internal influenza antigens, 1 year after immunization with pandemic H1N1 influenza vaccine, and response to revaccination with seasonal trivalent-inactivated influenza vaccine. |
| title_sort | t cell responses in children to internal influenza antigens 1 year after immunization with pandemic h1n1 influenza vaccine and response to revaccination with seasonal trivalent inactivated influenza vaccine |
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