Figure 4. Caspase 3 western-blot analysis. As a positive control HL-60 cells were treated with etoposide (Eto). The cleaved, active form of caspase 3 is seen. Expression of pro-caspase 3 is seen en BRECs in all conditions. No expression of activated caspase 3 was detected in any of the treated BRECs, demonstrating that triamcinolone acetonide (TA) did not induce caspase 3 activation.