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The other T helper cells in asthma pathogenesis
Christina Vock1, Hans-Peter Hauber, Michael Wegmann
1Department of Experimental Pneumology, Research Center Borstel, 23845 Borstel, Germany.
Journal of Allergy
|October 27, 2010
Summary
New T helper cells beyond T helper 2 (TH2) cells, including TH9, TH17, TH25, TH3, and regulatory T cells, are increasingly implicated in allergic asthma pathogenesis. Understanding these diverse T cell roles is crucial for developing effective asthma therapies.
Area of Science:
- Immunology
- Respiratory Medicine
- Cell Biology
Background:
- Allergic asthma is a complex respiratory condition characterized by variable bronchoobstruction, mucus hypersecretion, and airway remodeling.
- Chronic airway inflammation, orchestrated by T helper 2 (TH2) cells and their mediators like IL-4, IL-5, and IL-13, is a key feature of asthma pathogenesis.
- Therapeutic strategies targeting TH2-type mediators have shown limited efficacy, suggesting a need to explore other immune pathways in asthma.
Purpose of the Study:
- To summarize recent scientific insights into the roles of newly identified T helper cell subsets in the pathogenesis of allergic asthma.
- To highlight the contribution of T helper 9 (TH9), T helper 17 (TH17), T helper 25 (TH25), T helper 3 (TH3), and regulatory T cells in asthma development and exacerbation.
Main Methods:
- Literature review of recent research on T helper cell subsets and their involvement in asthma.
- Analysis of studies investigating the mechanisms by which different T helper cells contribute to airway inflammation and remodeling.
- Synthesis of findings on the immunopathogenesis of asthma beyond the traditional TH2 paradigm.
Main Results:
- T helper 2 (TH2) cells play a significant role through mediators like IL-4, IL-5, and IL-13.
- Emerging evidence implicates T helper 9 (TH9) and T helper 17 (TH17) cells in promoting asthma.
- Other T cell subsets, including TH25, TH3, and regulatory T cells, are also recognized for their involvement in asthma pathogenesis.
Conclusions:
- Asthma pathogenesis is more complex than initially understood, involving multiple T helper cell subsets.
- Targeting pathways beyond TH2 cells may offer novel therapeutic strategies for allergic asthma.
- Further research into the distinct functions of these T helper cells is essential for advancing asthma treatment.
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