sentences:  have created a cancer-specific vector expressing siRNA for green fluorescent protein (GFP) under the human survivin promoter.MCF7 breast cancer cells were cotransfected with this vector and a GFP-expressing vector as well.Their major finding was that MCF7 cells transfected with the siRNA vector for GFP under the survivin promoter had a significant reduction in GFP expression then the cells transfected with the siRNA vector under a cancer non-specific promoter.