Allergy, Asthma & Immunology Research

The Korean Academy of Asthma, Allergy and Clinical Immunology (대한천식알레르기학회)
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Immunopathogenesis of Allergic Asthma: More Than the Th2 Hypothesis

  • Kim, You-Me (Department of Life Science, Pohang University of Science and Technology (POSTECH)) ;
  • Kim, You-Sun (Department of Life Science, Pohang University of Science and Technology (POSTECH)) ;
  • Jeon, Seong Gyu (Department of Life Science, Pohang University of Science and Technology (POSTECH)) ;
  • Kim, Yoon-Keun (Department of Life Science, Pohang University of Science and Technology (POSTECH))
  • Published : 2013.07.01
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Abstract

Asthma is a chronic obstructive airway disease that involves inflammation of the respiratory tract. Biological contaminants in indoor air can induce innate and adaptive immune responses and inflammation, resulting in asthma pathology. Epidemiologic surveys indicate that the prevalence of asthma is higher in developed countries than in developing countries. The prevalence of asthma in Korea has increased during the last several decades. This increase may be related to changes in housing styles, which result in increased levels of indoor biological contaminants, such as house dust mite-derived allergens and bacterial products such as endotoxin. Different types of inflammation are observed in those suffering from mild-to-moderate asthma compared to those experiencing severe asthma, involving markedly different patterns of inflammatory cells and mediators. As described in this review, these inflammatory profiles are largely determined by the involvement of different T helper cell subsets, which orchestrate the recruitment and activation of inflammatory cells. It is becoming clear that T helper cells other than Th2 cells are involved in the pathogenesis of asthma; specifically, both Th1 and Th17 cells are crucial for the development of neutrophilic inflammation in the airways, which is related to corticosteroid resistance. Development of therapeutics that suppress these immune and inflammatory cells may provide useful asthma treatments in the future.

Keywords

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