Figure 4From: Enhanced effector function of cytotoxic cells in the induced sputum of COPD patientsCytotoxic activity of CD56+cells (Panel A), biological lytic activity (Panel B) and correlation of cytotoxic activity of CD56+cells and lung function in COPD subjects (Panel C). Immunomagnetically separated CD56+ cells were significantly more cytotoxic in COPD subjects than in HNS (***: p < 0.001) and smokers (**: p < 0.01) and were inversely correlated with FEV1.Back to article page