Figure 3

Fluence-dependent GRP78 protein expression in MCF-7 cells. (A) MCF-7 cells were incubated with 1.5 × 10−6 M Foscan® for 3 h or (B) 24 h and subjected to equitoxic light doses. Western Blotting of GRP78 and actin protein expression was determined from cell lysates at 4 and 24 h after PDT. Control cells (NL) were subjected to Foscan® only (drug, no light).