PT - JOURNAL ARTICLE AU - J Jacquot AU - A Hayem AU - C Galabert TI - Functions of proteins and lipids in airway secretions AID - 10.1183/09031936.93.05030343 DP - 1992 Mar 01 TA - European Respiratory Journal PG - 343--358 VI - 5 IP - 3 4099 - http://erj.ersjournals.com/content/5/3/343.short 4100 - http://erj.ersjournals.com/content/5/3/343.full SO - Eur Respir J1992 Mar 01; 5 AB - Proteins and lipids synthesized by airway secretory cells or transudated are active components in the protection of respiratory epithelium. Proteins and ions are involved in the control of mucus hydration. Secretory proteins, such as secretory immunoglobulin A (IgA), transferrin and lysozyme, participate in the airway antibacterial defence. Other biochemical components found in secretions, such as anti-inflammatory and antioxidant agents as well as antiproteases, contribute significantly to the protection of the underlying epithelium.