Secretion of TNFα in pg/mL from purified human NK cells from an individual donor exposed to dibutyltin for 24h, 48 h, and 6 days. NK cells were exposed to concentrations of DBT of 0, 0.05, 0.1, 0.25, 0.5, 1, 2.5 and 5 µM for 24 h, 48, h or 6 days. Data are the secretion of TNFα in pg/mL from the cells of an individual donor. Each sample was tested in triplicate (n=3). Values are mean±S.D at each concentration for each length of incubation.