Pollen Extract of Populus deltoides Stimulates Lung Inflammation in a Mouse Model

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Allergic asthma is an inflammatory disease of the airways characterized by recurrent episodes of wheezing, bronchoconstriction, and airway hyperresponsiveness (AHR)[1]. In recent years, allergic asthma has become a heated public health problem because of the highly increased incidence and prevalence[2]. The main pathogenesis of asthma is airway inflammation and AHR. AHR is caused by an imbalance of Th1/Th2 cells with predominance to Th2, whereas airway inflammation is caused by increased levels of Th2 cytokine[3].
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