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Cellular immune correlates of protection against symptomatic pandemic influenza.
- Source :
- Nature Medicine; Oct2013, Vol. 19 Issue 10, p1305-1312, 8p
- Publication Year :
- 2013
-
Abstract
- The role of T cells in mediating heterosubtypic protection against natural influenza illness in humans is uncertain. The 2009 H1N1 pandemic (pH1N1) provided a unique natural experiment to determine whether crossreactive cellular immunity limits symptomatic illness in antibody-naive individuals. We followed 342 healthy adults through the UK pandemic waves and correlated the responses of pre-existing T cells to the pH1N1 virus and conserved core protein epitopes with clinical outcomes after incident pH1N1 infection. Higher frequencies of pre-existing T cells to conserved CD8 epitopes were found in individuals who developed less severe illness, with total symptom score having the strongest inverse correlation with the frequency of interferon-γ (IFN-γ)<superscript>+</superscript> interleukin-2 (IL-2)<superscript>−</superscript> CD8<superscript>+</superscript> T cells (r = −0.6, P = 0.004). Within this functional CD8<superscript>+</superscript>IFN-γ<superscript>+</superscript>IL-2<superscript>−</superscript> population, cells with the CD45RA<superscript>+</superscript> chemokine (C-C) receptor 7 (CCR7)<superscript>−</superscript> phenotype inversely correlated with symptom score and had lung-homing and cytotoxic potential. In the absence of crossreactive neutralizing antibodies, CD8<superscript>+</superscript> T cells specific to conserved viral epitopes correlated with crossprotection against symptomatic influenza. This protective immune correlate could guide universal influenza vaccine development. [ABSTRACT FROM AUTHOR]
- Subjects :
- IMMUNE system
T cells
H1N1 influenza
SYMPTOMS
IMMUNOGLOBULINS
EPITOPES
INTERFERONS
Subjects
Details
- Language :
- English
- ISSN :
- 10788956
- Volume :
- 19
- Issue :
- 10
- Database :
- Complementary Index
- Journal :
- Nature Medicine
- Publication Type :
- Academic Journal
- Accession number :
- 90575380
- Full Text :
- https://doi.org/10.1038/nm.3350