Fig. 7
From: Electronic cigarette exposure triggers neutrophil inflammatory responses
Acrolein induced MMP-9 release. Neutrophils from six healthy subjects were exposed to acrolein (0.1–1 μM) for 6 h. Supernatants were analysed for MMP-9 by ELISA. Data presented as mean ± SEM where * = significant increase compared to unstimulated control (p < 0.05)