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The Role of Type 2 Inflammation in the Pathogenesis of Asthma Exacerbations #MMPMID26595730
Dunican EM; Fahy JV
Ann Am Thorac Soc 2015[Nov]; 12 (Suppl 2): S144-9 PMID26595730show ga
Asthma exacerbations are an important cause of asthma morbidity. Although viral infection of the upper airway is a common cause of asthma exacerbations, the reasons why some patients with asthma are exacerbation prone and others are exacerbation resistant are not fully understood. In this review, we examine whether Type 2 inflammation modifies airway function to make patients more susceptible to asthma exacerbations. The best data supporting a role for Type 2 inflammation in asthma exacerbations come from clinical trials of inhibitors of Type 2 inflammation in asthma. These trials include studies with omalizumab (an inhibitor of IgE) and others with inhibitors of Type 2 cytokines (IL-4, IL-5, and IL-13). All of these trials consistently show that inhibiting the Type 2 pathway causes a clinically significant reduction in asthma exacerbations. Thus, it is now clear that Type 2 inflammation is an important mechanism of susceptibility to asthma exacerbation.