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. 2016 Oct 31;6:36086. doi: 10.1038/srep36086

Figure 8. Drug effect on U-251 MG cells.

Figure 8

U-251 MG cells were cultured within the central microchamber for 24 hours before drug addition in order to allow time for formation of a hypoxic region first. Growth medium (A), 100 μM TMZ (B), 1.6 μg/ml CPT-5Ala or 100 μM TPZ (C) were perfused through both lateral microchannels and after 3 days cell viability was assessed using by PI/CAM staining. (E) The graphs show the PI fluorescence intensity along the delimited region, demonstrating that TMZ had a mild effect on U-251 MG cell viability. TPZ exerted a strong effect in the hypoxic areas. Position of the pillars is delimited by a grey dashed line. Scale bar is 200 μm.