Fig. 2. Tobacco smoke exposure does not affect apoptosis in differentiating human embryonic stem cells.
hESCs were cultured in differentiation conditions for 8, 14, or 21 days in control, nicotine-supplemented, or tobacco smoke-exposed media, and apoptosis was quantified by flow cytometric analysis of TUNEL staining. Data shown are mean±SD (N=3). Apoptosis levels were similar in all conditions at each time point, and an increase in apoptosis was observed with progress of differentiation.