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      Viral Vaccines and CTL Response

      review-article
      , *
      Journal of Biomedicine and Biotechnology
      Hindawi Publishing Corporation

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          Abstract

          Immune induction by successful vaccine formulations seems to involve stimulation of both humoral and cellular arms of immunity. Nevertheless, CD8+ CTLs are of critical relevance in the context of intracellular infection and tumor for many reasons. The task of exerting antipathogen activity by CD8+ T cells, which principally function to control and eradicate intracellular pathogens, is enabled by constitutive expression of MHC class-I molecules on all tissue types. CTL induction offers hope for vaccines against pathogens that are resistant to neutralizing activity. This review discusses the mechanism of immune induction by some successful vaccines and based on the accrued evidence suggests ideas for improved design of CTL-inducing vaccines.

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          Most cited references71

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          Systems biology approach predicts immunogenicity of the yellow fever vaccine in humans.

          A major challenge in vaccinology is to prospectively determine vaccine efficacy. Here we have used a systems biology approach to identify early gene 'signatures' that predicted immune responses in humans vaccinated with yellow fever vaccine YF-17D. Vaccination induced genes that regulate virus innate sensing and type I interferon production. Computational analyses identified a gene signature, including complement protein C1qB and eukaryotic translation initiation factor 2 alpha kinase 4-an orchestrator of the integrated stress response-that correlated with and predicted YF-17D CD8(+) T cell responses with up to 90% accuracy in an independent, blinded trial. A distinct signature, including B cell growth factor TNFRS17, predicted the neutralizing antibody response with up to 100% accuracy. These data highlight the utility of systems biology approaches in predicting vaccine efficacy.
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            The biology of interleukin-2 and interleukin-15: implications for cancer therapy and vaccine design.

            Interleukin-2 and interleukin-15 have pivotal roles in the control of the life and death of lymphocytes. Although their heterotrimeric receptors have two receptor subunits in common, these two cytokines have contrasting roles in adaptive immune responses. The unique role of interleukin-2 is in the elimination of self-reactive T cells to prevent autoimmunity. By contrast, interleukin-15 is dedicated to the prolonged maintenance of memory T-cell responses to invading pathogens. As discussed in this Review, the biology of these cytokines will affect the development of novel therapies for malignancy and autoimmune diseases, as well as the design of vaccines against infectious diseases.
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              Duration of antiviral immunity after smallpox vaccination.

              Although naturally occurring smallpox was eliminated through the efforts of the World Health Organization Global Eradication Program, it remains possible that smallpox could be intentionally released. Here we examine the magnitude and duration of antiviral immunity induced by one or more smallpox vaccinations. We found that more than 90% of volunteers vaccinated 25-75 years ago still maintain substantial humoral or cellular immunity (or both) against vaccinia, the virus used to vaccinate against smallpox. Antiviral antibody responses remained stable between 1-75 years after vaccination, whereas antiviral T-cell responses declined slowly, with a half-life of 8-15 years. If these levels of immunity are considered to be at least partially protective, then the morbidity and mortality associated with an intentional smallpox outbreak would be substantially reduced because of pre-existing immunity in a large number of previously vaccinated individuals.
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                Author and article information

                Journal
                J Biomed Biotechnol
                JBB
                Journal of Biomedicine and Biotechnology
                Hindawi Publishing Corporation
                1110-7243
                1110-7251
                2010
                31 March 2010
                : 2010
                : 141657
                Affiliations
                Department of Microbiology, Quillen College of Medicine, East Tennessee State University, Johnson City, TN 37614, USA
                Author notes
                *Uday Kumaraguru: kumaragu@ 123456etsu.edu

                Academic Editor: Hanchun Yang

                Article
                10.1155/2010/141657
                2850151
                20379365
                ab46c11c-fba4-424d-84c8-62d5e2485fd8
                Copyright © 2010 S. N. Woolard and U. Kumaraguru.

                This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

                History
                : 7 December 2009
                : 24 February 2010
                Categories
                Review Article

                Molecular medicine
                Molecular medicine

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