Fig. 4From: Bifidobacterial recombinant thymidine kinase-ganciclovir gene therapy system induces FasL and TNFR2 mediated antitumor apoptosis in solid tumorsAnalysis of FasL in the intestinal colo320 xenograft cancer tissues (n = 3) by immunofluorescence. Red is positive for expression of Fasl protein. a PBS, b GCV, c BF, d BF + GCV, e BF-rTK + GCV (200×). The nuclei were stained with DAPI. f Quantitative analysis of the fluorescence intensity from immunofluorescence. (*P < 0.05 statistically significant when comparing treated versus control)Back to article page