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DAMPs and adjuvant.

Minami Kojima1, Daisuke Ori1, Taro Kawai1

  • 1Laboratory of Molecular Immunobiology, Division of Biological Science, Graduate School of Science and Technology, Life Science Collaboration Center (LiSCo), Medilux Research Center, Nara Institute of Science and Technology (NAIST), Ikoma, Nara 630-0192, Japan.

Current Opinion in Virology
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Summary

Vaccine adjuvants activate innate immunity through cellular stress and damage-associated molecular patterns (DAMPs). This review explores DAMP signaling pathways and their role in designing effective vaccine adjuvants, like chitosan.

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Area of Science:

  • Immunology
  • Vaccinology
  • Molecular Biology

Background:

  • Vaccine adjuvants are crucial for enhancing immune responses.
  • Adjuvant mechanisms are increasingly understood to involve cellular stress responses beyond single pattern-recognition receptors.
  • Damage-associated molecular patterns (DAMPs) are key mediators linking adjuvant-induced cellular changes to immune activation.

Purpose of the Study:

  • To review how cellular stress and death from adjuvants release DAMPs.
  • To summarize DAMP sensing by innate immune pathways (TLRs, cGAS-STING, NLRP3 inflammasomes).
  • To discuss DAMP signaling in dendritic cell activation and adaptive immunity, using chitosan adjuvants as a case study.

Main Methods:

  • Literature review of cellular stress, DAMP release, and innate immune sensing pathways.
  • Analysis of DAMP-mediated signaling in dendritic cell activation.
  • Case study of chitosan-based adjuvants and their DAMP-associated mechanisms.

Main Results:

  • Adjuvant administration induces cellular stress and death, leading to DAMP release.
  • DAMPs activate innate immune pathways including Toll-like receptors, cGAS-STING, and NLRP3 inflammasomes.
  • DAMP signaling is critical for dendritic cell maturation and subsequent adaptive immune responses.

Conclusions:

  • Cellular stress and DAMPs are central to adjuvant-induced innate immune activation.
  • Understanding DAMP pathways informs the rational design of novel vaccine adjuvants.
  • Chitosan-based adjuvants exemplify materials that leverage DAMP signaling for enhanced vaccine efficacy.