Abstract

To investigate the mechanism and effect of diallyl disulfide (DADS) on the bystander effect of herpes simplex virus kinase/ganciclovir (HSV-tk/GCV) suicide gene therapy system which was mediated by recombinant adeno-associated virus (rAAV) in lens epithelial cells. Immunohistochemistry method was used to determine the distribution of connexin 43 (Cx43) protein in cultured rabbit lens epithelial cells and rabbit lens epithelial cells transfected by HSV-tk suicide gene. Cx43 protein was measured and analyzed in cultured rabbit lens epithelial cells and rabbit lens epithelial cells transfected by HSV-tk suicide gene that was induced by various DADS. Cell survival was determined by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide method. DADS increased the Cx43 protein expression in cultured rabbit lens epithelial cells and rabbit lens epithelial cells transfected by HSV-tk suicide gene, and especially in 50 μmol/L DADS. After combining with DADS, the bystander effect was significantly improved (P<0.05). DADS can elevate the expression of Cx43 protein and enhance the bystander effect of HSV-tk/GCV suicide gene therapy system.

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