Figure 1
From: Accumulation of metals in GOLD4 COPD lungs is associated with decreased CFTR levels
Chronic exposure to cigarette smoke (CS) decreases airway surface liquid (ASL) height. Primary human airway epithelial cells from 4 donors (n = 8) were exposed to 30 puffs of whole cigarette smoke (2 cigarettes) every day for 5 days (120 hrs). (A) ASL height was measured one hour after each exposure to CS. ASL height was undisturbed over the course of the reading. *p < 0.05. (B) CFTR present at the plasma membrane was detected by immunoblotting after biotinylation of cell surface proteins (see Methods).