We performed another set of same angiogenic network formation experiments for our in situ immunofluorescence microscopic studies using the FITC conjugated anti-VEGF antibody to examine any changes in expression of VEGF in glioblastoma U87MG and U118MG cells due to dose-dependent photofrin based PDT (Fig. 4b). The gene discussed is VEGFA; the disease is glioblastoma.