Mucociliary clearance (MCC) (MCC)

Mucociliary clearance (MCC) is a fundamental innate defense mechanism of the mammalian respiratory tract that protects the lungs by removing inhaled particles, pathogens, and toxins. This process relies on the synchronized interaction of three components: the mucus layer that traps foreign material, the periciliary liquid layer that facilitates ciliary movement, and the rhythmic beating of ciliated epithelial cells that propels the mucus toward the pharynx (StatPearls, NBK546658). Effective MCC is essential for maintaining airway patency and sterility; its dysfunction is a central feature of diseases such as cystic fibrosis, chronic obstructive pulmonary disease (COPD), and primary ciliary dyskinesia (PubMed, 24636460). Pharmacological interventions targeting MCC typically focus on improving mucus rheology through mucolytics, increasing airway hydration via osmotic agents or ion channel modulators, or enhancing ciliary activity (PMC3131152). While not a single molecular target, MCC represents a critical physiological pathway for therapeutic development in respiratory medicine.

Other names

Mucociliary transportMucociliary escalatorBronchial clearanceAirway clearance

Enhancement of airway surface liquid hydration, reduction of mucus viscosity through the cleavage of disulfide bonds or DNA polymers, and stimulation of ciliary beat frequency to facilitate the physical removal of secretions (StatPearls, NBK546658).