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Persistence of cell-mediated immunity three decades after vaccination with the live vaccine strain of Francisella tularensis
Umeå University, Faculty of Medicine, Department of Clinical Microbiology.
Umeå University, Faculty of Medicine, Department of Clinical Microbiology.
Umeå University, Faculty of Science and Technology, Department of Mathematics and Mathematical Statistics. (Computational Life Science Cluster (CLiC))
Umeå University, Faculty of Medicine, Department of Clinical Microbiology.
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2011 (English)In: European Journal of Immunology, ISSN 0014-2980, E-ISSN 1521-4141, Vol. 41, no 4, 974-980 p.Article in journal (Refereed) Published
Abstract [en]

The efficacy of many vaccines against intracellular bacteria depends on the generation of cell-mediated immunity, but studies to determine the duration of immunity are usually confounded by re-exposure. The causative agent of tularemia, Francisella tularensis, is rare in most areas and, therefore, tularemia vaccination is an interesting model for studies of the longevity of vaccine-induced cell-mediated immunity. Here, lymphocyte proliferation and cytokine production in response to F. tularensis were assayed in two groups of 16 individuals, vaccinated 1-3 or 27-34 years previously. As compared to naïve individuals, vaccinees of both groups showed higher proliferative responses and, out of 17 cytokines assayed, higher levels of MIP-1β, IFN-γ, IL-10, and IL-5 in response to recall stimulation. The responses were very similar in the two groups of vaccinees. A statistical model was developed to predict the immune status of the individuals and by use of two parameters, proliferative responses and levels of IFN-γ, 91.1% of the individuals were correctly classified. Using flow cytometry analysis, we demonstrated that during recall stimulation, expression of IFN-γ by CD4(+) CCR7(+) , CD4(+) CD62L(+) , CD8(+) CCR7(+) , and CD8(+) CD62L(+) cells significantly increased in samples from vaccinated donors. In conclusion, cell-mediated immunity was found to persist three decades after tularemia vaccination without evidence of decline.

Place, publisher, year, edition, pages
Weinheim: Wiley-VCH Verlagsgesellschaft, 2011. Vol. 41, no 4, 974-980 p.
Keyword [en]
Cell-mediated immunity, Francisella tularensis, Persistence, Vaccination
National Category
Immunology in the medical area
URN: urn:nbn:se:umu:diva-50333DOI: 10.1002/eji.201040923ISI: 000288821000011PubMedID: 21442618OAI: diva2:462087
Available from: 2011-12-06 Created: 2011-12-06 Last updated: 2016-05-24Bibliographically approved

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Eneslätt, KjellRietz, CeciliaRydén, PatrikStöven, SvenjaTärnvik, ArneSjöstedt, Anders
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Department of Clinical MicrobiologyDepartment of Mathematics and Mathematical Statistics
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European Journal of Immunology
Immunology in the medical area

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