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Evaluation of Host-Pathogen Responses and Vaccine Efficacy in Mice
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Innate sensors that regulate vaccine responses.

Philipp Georg1, Leif E Sander1

  • 1Department of Infectious Diseases and Pulmonary Medicine, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany.

Current Opinion in Immunology
|April 13, 2019
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Summary

Pattern recognition receptors (PRRs) are key to how antigen-presenting cells (APCs) shape adaptive immunity. Microbial nucleic acids and their sensors offer a promising strategy to mimic live attenuated vaccines for enhanced immune responses.

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Area of Science:

  • Immunology
  • Vaccinology
  • Infectious Disease

Background:

  • Pattern recognition receptors (PRRs) are crucial for antigen-presenting cell (APC) function and adaptive immunity.
  • Live attenuated vaccines provide potent, long-lasting immunity due to their inherent adjuvanticity.
  • Current vaccine adjuvants often target single PRRs or use indirect inflammatory pathways.

Purpose of the Study:

  • To review the influence of innate immune sensors on responses to live attenuated vaccines.
  • To examine the impact of common vaccine adjuvants on innate and adaptive immunity.
  • To explore the potential of microbial nucleic acids and their receptors as vaccine adjuvants.

Main Methods:

  • Literature review focusing on human vaccine responses.
  • Analysis of the role of pattern recognition receptors (PRRs) in vaccine immunogenicity.
  • Discussion of microbial nucleic acids as agonists for PRRs.

Main Results:

  • Innate sensors critically modulate immune responses to live attenuated vaccines.
  • Common adjuvants engage PRRs or induce inflammation to enhance vaccine efficacy.
  • Microbial nucleic acids and their sensing pathways show potential for mimicking live attenuated vaccine effects.

Conclusions:

  • Understanding PRR engagement is vital for optimizing vaccine design.
  • Microbial nucleic acids offer a promising avenue for developing novel, effective vaccine adjuvants.
  • Targeting innate sensing mechanisms can enhance protective immunity induced by vaccines.