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Characterization of the T-cell subpopulations in the granulation tissues of chronic suppurative otitis media

Bing Wang1, Ying Cheng1, Min Xu1

  • 1Department of Otolaryngology, Head and Neck Surgery, The Second Affiliated Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi 710004, P.R. China.

Biomedical Reports
|June 18, 2016
PubMed

Insights

Specific T-cell subpopulations, including cluster of differentiation 8+ (CD8+) and forkhead box P3+ (FOXP3+) regulatory T (Treg) cells, are elevated in chronic suppurative otitis media (CSOM) granulation tissue, indicating their role in lesion formation.

Area of Science:

  • Immunology
  • Otolaryngology
  • Cellular Biology

Background:

  • Chronic suppurative otitis media (CSOM) is characterized by persistent middle ear inflammation and discharge.
  • Granulation tissue formation is a key pathological feature in chronic otitis media, but the specific immune cells involved remain unclear.

Purpose of the Study:

  • To investigate the involvement of T-cell subpopulations in granulation tissue formation in CSOM.
  • To correlate T-cell infiltration with clinical parameters such as disease course and ear discharge.

Main Methods:

  • Histopathological analysis of granulation tissue from 15 CSOM patients using Hematoxylin and eosin staining.
  • Immunohistochemical characterization of T-cell subpopulations, including CD8+, FOXP3+ regulatory T (Treg), and OX40+ T cells.
  • Comparison of T-cell numbers in relation to disease activity and tissue maturity.

Main Results:

  • Significantly higher numbers of CD8+ T cells, FOXP3+ Treg cells, and OX40+ T cells were observed in granulation tissues from patients with recent ear discharge.
  • Fresh granulation tissues exhibited greater infiltration of CD8+ T cells and FOXP3+ Treg cells compared to mature tissues.
  • No significant association was found between granulation tissue formation and the overall disease course.

Conclusions:

  • Specific T-cell subpopulations, particularly CD8+ and FOXP3+ Treg cells, are differentially abundant in CSOM granulation tissue.
  • T-cell mediated immunity likely plays a crucial role in the pathogenesis and lesion development of CSOM.
Keywords:
T-cell subpopulationschronic suppurative otitis mediaear dischargegranulation tissue

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