After nicotine treatment, cells were harvested and homogenized to extract proteins for caspase-1 activity assay by using a commercially available kit (Biovision). These data were expressed as the fold change compared with control cells. In addition, the cell supernatant was also collected to measure the IL-1β production by a mouse IL-1β ELISA kit (Bender Medsystems, Burlingame, CA) according to the protocol described by the manufacturer [21 (link), 50 (link)].
Free full text: Click here