Airway secretory cell

Airway secretory cells are specialized epithelial cells in the respiratory tract responsible for producing and secreting mucins (primarily MUC5AC and MUC5B proteins), which combine with water and other macromolecules to form mucus[1][4][5][6]. Mucus is essential for trapping inhaled particles, pathogens, and debris, allowing them to be cleared from the airways via ciliary movement and cough[5][6]. Several types of secretory cells exist, including goblet cells (surface epithelium), club cells (nonciliated bronchiolar secretory cells), and acinar mucous/serous cells of submucosal glands[2][4][7]. Secretory cell numbers and function can be dramatically increased (hyperplasia/metaplasia) in response to disease, notably in asthma, chronic bronchitis, and cystic fibrosis[1][3][4][5]. These cells also produce antimicrobial peptides (e.g., lysozyme, lactoferrin) to defend against infection[2][6]. The airway secretory cell is not a canonical molecular target (receptor, enzyme, etc.) but represents a heterogeneous functional cell population; drugs that interact with these cells aim to alter mucus properties or secretion rather than binding to a single molecular entity. Additional context: - “Airway mucus/secretory cells” refers to a cell population, not a single molecular target or receptor. It is therefore not a canonical drug target in the conventional sense (such as a G protein-coupled receptor or ion channel)[1][4][5]. - The function and prevalence of airway secretory cells and their products (mucins) are central to many airway diseases, and several drugs affect their function indirectly or nonspecifically[5][6]. - Targeting airway mucus remains challenging due to physiologic necessity (protective barriers) and disease-promoting excess; safe, selective modulation is an Ka ea of ongoing research[5][6].

Other names

airway mucous cellairway goblet cellairway club cellsubmucosal gland acinar cellairway epithelial secretory cell

Reduction or alteration of mucus viscosity (mucolytics); Inhibition of mucus synthesis/secretion (anticholinergics, corticosteroids); Modulation of epithelial inflammation (corticosteroids, macrolides)