However, while asthma is usually associated with eosinophils, TH2 cells, and/or mast cells, and COPD is commonly linked to TH1 cells, neutrophils, and macrophages, in COPD protein levels and TSLP mRNA were elevated in the bronchial epithelium compared with the controls [65]. The gene discussed is TSLP; the disease is chronic obstructive pulmonary disease.