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Immune responses against Streptococcus pyogenes in human palatine tonsils
H Kerakawauchi1, Y Kurono, G Mogi
1Department of Otolaryngology, Oita Medical University, Hasama-machi, Japan.
The Laryngoscope
|May 1, 1997
Summary
Recurrent tonsillitis (RT) involves higher Streptococcus pyogenes presence. Immune responses targeting M protein may prevent bacterial colonization in tonsils, suggesting a role in RT pathogenesis.
Area of Science:
- Immunology
- Microbiology
- Otorhinolaryngology
Background:
- Streptococcus pyogenes is a common cause of tonsillitis.
- Cellular immunity and T cell responses are crucial in managing bacterial infections.
- The role of M protein in tonsillar immunity requires further investigation.
Purpose of the Study:
- To investigate cellular immunity against Streptococcus pyogenes in human tonsils.
- To analyze the role of M protein-specific immune responses in recurrent tonsillitis (RT).
- To compare immune responses in patients with RT and tonsillar hypertrophy (TH).
Main Methods:
- Measurement of antigen-specific immunoglobulin-secreting cells.
- Quantification of cytokine production from CD4+ T cells.
- Analysis of T cell proliferation in response to M protein.
Main Results:
- Higher incidence of S. pyogenes in tonsils of RT patients compared to TH patients.
- Increased M protein-specific IgA and IgG spot-forming cells in RT patients.
- Elevated IFN-gamma and IL-4 concentrations in RT patients, indicating heightened immune activity.
Conclusions:
- S. pyogenes is associated with the pathogenesis of recurrent tonsillitis.
- Immune responses targeting M protein are crucial for preventing S. pyogenes colonization in tonsils.
- Understanding these immune mechanisms can inform strategies for managing tonsillitis.