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An antigen is any substance the immune system identifies as foreign and potentially harmful to the body, prompting an immune response. Antigens have two functional properties: immunogenicity and reactivity. Immunogenicity is the ability of an antigen to stimulate a specific immune response. At the same time, reactivity describes the antigen's ability to react with the cells and antibodies produced in response to it.
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Synthesis of Lymph Node-Targeting Adjuvants.

Melissa C Hanson1, Darrell J Irvine2,3,4,5,6

  • 1Department of Cell Biology and Infection, Institut Pasteur, 28 rue du Docteur Roux, 75015, Paris, France. mchanson@alum.mit.edu.

Methods in Molecular Biology (Clifton, N.J.)
|October 9, 2016
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Summary

Novel nanoparticle carriers effectively target molecular adjuvants to lymph nodes, enhancing immune responses. This overcomes limitations of small molecule adjuvants by optimizing delivery via optimized nanoparticle size.

Keywords:
Adjuvant carriersCyclic di-GMPCyclic dinucleotidesLiposomesLymph node targetingMPLANanoparticles

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Area of Science:

  • Immunology
  • Nanotechnology
  • Vaccine Development

Background:

  • Pattern recognition receptor agonists are potent molecular adjuvants that stimulate innate immunity and protective responses to subunit antigens.
  • Small molecule adjuvants face pharmacokinetic challenges, with a tendency to enter the bloodstream instead of lymphatics after injection.
  • Targeting adjuvants to lymph nodes is crucial for maximizing their efficacy.

Purpose of the Study:

  • To develop nanoparticle carriers for targeted delivery of molecular adjuvants to lymph nodes.
  • To optimize nanoparticle size for efficient lymphatic drainage and avoidance of systemic circulation.
  • To provide detailed methods for synthesizing liposome nanoparticle carriers for both hydrophobic and hydrophilic adjuvants.

Main Methods:

  • Development of nanoparticle carriers with size optimized for lymphatic targeting.
  • Synthesis of liposome nanoparticle carriers suitable for encapsulating hydrophobic or hydrophilic adjuvants.
  • Detailed description of materials, procedures, synthesis tips, alternative equipment, and potential pitfalls.

Main Results:

  • Demonstrated successful synthesis of liposome nanoparticle carriers.
  • Established a method for size optimization to achieve lymphatic targeting.
  • Provided a comprehensive guide for researchers to replicate the synthesis process.

Conclusions:

  • Optimized nanoparticle carriers offer a viable strategy to overcome the pharmacokinetic limitations of molecular adjuvants.
  • Targeted delivery to lymph nodes enhances the potential of adjuvants in vaccine formulations.
  • The described methods facilitate the production of effective nanoparticle-based adjuvant delivery systems.