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Pattern recognition receptor signaling in otitis media: immune crosstalk and pathogenic mechanisms

Mingwen Guo1, Shaoyan Zhang1, Zhencheng Liao1

  • 1Department of Otorhinolaryngology Head and Neck Surgery, The People's Hospital of Baoan, Shenzhen, China.

Frontiers in Immunology
|May 14, 2026
PubMed

Insights

Otitis media involves complex immune responses mediated by pattern recognition receptors (PRRs). Understanding PRR signaling in otitis media offers new avenues for precision immunotherapies.

Area of Science:

  • Immunology
  • Otolaryngology
  • Microbiology

Background:

  • Otitis media (OM) is a common middle ear inflammation, particularly in children.
  • Pattern recognition receptors (PRRs) are crucial for detecting pathogens and initiating immune responses in OM.
  • Dysregulation of PRRs like TLRs, NLRs, RLRs, and CLRs contributes to OM chronicity and recurrence.

Purpose of the Study:

  • To review the role of various PRRs in the pathophysiology of otitis media.
  • To elucidate the intricate signaling networks involving PRRs in OM.
  • To identify potential therapeutic targets for improved OM management.

Main Methods:

  • Literature review of current research on PRRs in otitis media.
  • Analysis of the signaling pathways mediated by Toll-like receptors (TLRs), NOD-like receptors (NLRs), RIG-I-like receptors (RLRs), and C-type lectin receptors (CLRs).
  • Examination of microbial evasion strategies and PRR cross-talk in chronic OM.

Main Results:

  • Specific PRRs (TLR2, TLR4, NOD1, NOD2, NLRP3, RIG-I) play distinct roles in bacterial and viral clearance.
  • Emerging roles of C-type lectin receptors (CLRs) in modulating immune responses in OM are highlighted.
  • PRR interactions and microbial biofilms significantly contribute to OM persistence.

Conclusions:

  • A comprehensive understanding of the PRR-mediated signaling landscape is essential for managing OM.
  • Variations in PRR function related to age or genotype may necessitate personalized immunotherapies.
  • Targeting PRR pathways presents promising translational strategies for otitis media treatment.
Keywords:
NLRP3immunityinflammasomeinflammationotitis mediapattern recognition receptorstoll-like receptors

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