Transepithelial exit of leucocytes: inflicting, reflecting or resolving airway inflammation?
The passage of infiltrated tissue granulocytes across airway epithelium into airway lumen is generally considered to be a pathogenic process in asthma and chronic obstructive pulmonary disease (COPD). An alternative hypothesis is proposed here-namely that the transepithelial egression of infiltrated leucocytes acts to rid diseased airway tissues of proinflammatory cells efficiently and non-injurio
