Decreased

<p><b>AM expression of CD98 in COPD.</b> Percentage of alveolar macrophages (AM) expressing CD98. CD98 was measured by flow cytometry on AM from 8 never-smoker control subjects and 11 subjects with COPD (6 current smokers and 5 ex-smokers). Data presented as box plots as described in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0056147#pone-0056147-g001" target="_blank">Figure 1</a>. *<i>p</i><0.05; **<i>p</i><0.01 vs. never smoker controls.