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Decreased pattern-recognition receptor-mediated cytokine mRNA expression in obese children with otitis media with

Youn Jung Kim1, Sung Ho Cha2, Ho Yun Lee3

  • 1Kyung Hee University College of Nursing Science, Seoul, Korea.

Clinical and Experimental Otorhinolaryngology
|March 4, 2014
PubMed

Insights

Obese children with otitis media with effusion (OME) show lower expression of key immune signaling molecules. This study highlights altered innate immune responses in pediatric OME related to obesity.

Area of Science:

  • Immunology
  • Pediatrics
  • Molecular Biology

Background:

  • Otitis media with effusion (OME) is common in children.
  • Obesity is increasingly prevalent in pediatric populations.
  • The impact of obesity on immune responses in OME is not fully understood.

Purpose of the Study:

  • To investigate innate and humoral immune responses in middle ear effusion (MEE) of obese versus non-obese pediatric patients with OME.
  • To compare the expression of pattern-recognition receptors (PRRs) and associated cytokines in MEE.

Main Methods:

  • Evaluated 219 children with OME (21 obese, 198 non-obese).
  • Compared mRNA expression of Toll-like receptors (TLRs), nucleotide-binding oligomerization domains (NODs), and key cytokines (ILs, IFN-γ, TNF-α) in MEE.
  • Assessed immunoglobulin (IgG, IgA, IgM) levels and bacterial detection rates in MEE.

Main Results:

  • Obese children had significantly lower mRNA expression of IL-6, IL-10, IL-12, and TNF-α mediated by TLRs and NOD2.
  • Humoral immune responses (IgG, IgA, IgM) were not significantly different between obese and non-obese groups.
  • No significant difference in bacterial detection rates was observed.

Conclusions:

  • Obese children with OME exhibit reduced pattern-recognition receptor-mediated cytokine mRNA expression.
  • Obesity may be associated with altered innate immune signaling in the middle ear.
  • Further research is needed to elucidate the clinical implications of these findings.
Abstract

Keywords:
BacteriaImmunityImmunoglobulinObesityOtitis mediaPattern-recognition receptors

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