Respiratory tract mucous secretion

**Respiratory tract mucous secretion** refers to the regulated production and release of mucus by specialized secretory (goblet) cells and submucosal glands within the airways. This process is fundamental for maintaining airway hydration, trapping inhaled pathogens and particles, and ensuring effective mucociliary clearance. Mucins (e.g., MUC5AC, MUC5B) are the primary gel-forming proteins; their secretion is tightly controlled by intracellular signaling pathways, ion channel function (notably CFTR), and regulated exocytosis involving SNARE and associated proteins[1][3]. Dysregulation, resulting in either mucus hypersecretion or impaired clearance, contributes directly to the morbidity of diseases such as asthma, COPD, cystic fibrosis, and bronchiectasis[1][2][3]. **Note:** For structured drug-target information, annotate key molecules: - *Mucin 5AC (MUC5AC)* - *Mucin 5B (MUC5B)* - *Cystic fibrosis transmembrane conductance regulator (CFTR)* - *P2Y2 purinergic receptor* - *Epithelial sodium channel (ENaC)* Each of these are molecular targets with existing or potential therapeutics. "Respiratory tract mucous secretion" itself is not a canonical drug target, but the molecules and pathways that regulate this process are[1][3].

Other names

Airway mucus secretionAirway mucous secretionAirway mucin secretion

Mucolytics disrupt disulfide bonds of mucin proteins, reducing mucus viscosity. Hydrators increase water content in mucus. Inhibitors of cholinergic signaling reduce mucous gland secretion. CFTR potentiation restores ion and water movement, normalizing mucus hydration.