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Surfactant proteins and innate immunity of otitis media

Osama Abdel-Razek1, Jason Audlin2, Dennis S Poe3

  • 1Department of Surgery, 21612SUNY Upstate Medical University, Syracuse, NY, USA.

Innate Immunity
|September 7, 2022
PubMed

Insights

Otitis media (OM), common in young children, involves pathogens entering the middle ear. Surfactant proteins A and D show potential for treating OM due to their immune functions and effects on the eustachian tube.

Area of Science:

  • Pediatrics
  • Immunology
  • Otolaryngology

Background:

  • Otitis media (OM) is a prevalent childhood illness, often necessitating medical attention.
  • OM development involves pathogen colonization, eustachian tube (ET) access, and overcoming host defenses.
  • Key bacterial culprits include *Streptococcus pneumoniae*, *nontypeable Haemophilus influenzae* (NTHi), and *Moraxella catarrhalis*.

Purpose of the Study:

  • To explore the role of innate immunity in otitis media resolution.
  • To investigate the function of surfactant proteins A (SP-A) and D (SP-D) in the middle ear and ET.
  • To assess the therapeutic potential of surfactant in OM treatment.

Main Methods:

  • Review of innate immunity components, including pattern recognition receptors like Toll-like receptors (TLRs) and Nod-like receptors (NLRs).
  • Examination of SP-A and SP-D presence and potential roles in the ET and middle ear mucosa.
  • Analysis of surfactant's biophysical and immunological properties relevant to OM.

Main Results:

  • Innate immunity is crucial for OM resolution in young children lacking developed adaptive immunity.
  • SP-A and SP-D function as pattern recognition receptors within the ET and middle ear.
  • Surfactant exhibits surface tension-lowering properties in the ET and immune-modulating functions.

Conclusions:

  • Surfactant proteins A and D play a role in innate defense against OM pathogens in the middle ear and ET.
  • Surfactant's biophysical and immunological characteristics suggest its potential as a novel therapeutic agent for otitis media.

Keywords:
Innate immunityotitis mediaotoscopysurfactant proteins

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