Effect of Flt3 ligand gene transfer in experimental pancreatic cancer

International Journal of Colorectal Disease
E RyschichJ Schmidt

Abstract

Fms-like tyrosine kinase 3 receptor (Flt3) is an important receptor expressed on the cell membrane of immature antigen-presenting cells. The binding of Flt3 to its ligand (FL) activates the proliferation of dendritic cells (DCs). This mechanism is currently being evaluated in the therapy of malignant tumors. The aim of the present study was to study the effect of FL gene transfer on the immune response and tumor growth in experimental pancreatic cancer. The rat FL was sequenced and cloned from total mRNA extract of the spleen. Transfection efficiency of subcutaneously growing rat duct-like pancreatic cancer (DSL6A) with DOTAP-/cholesterol-based liposomes was tested using a pcDNA3.1-lacZ construct. Flt3 ligand production of in vitro transfected tumor cells and in vivo transfected tumors was measured by enzyme-linked immunosorbent assay. Tumor induction was achieved in Lewis rats by a subcutaneous inoculation of syngeneic pancreatic tumor cells (DSL6A). The animals were allocated into three groups: control, mock treatment, and treatment with FL plasmid. The plasmid was injected intratumorally three times per week for 2 weeks. The total observation time was 6 weeks. The tumor volume was significantly lower in the FL-transfected gr...Continue Reading

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Citations

Dec 17, 2008·Expert Review of Gastroenterology & Hepatology·Gary MiddletonJohn P Neoptolemos
Oct 14, 2014·World Journal of Gastroenterology : WJG·Si-Xue LiuYing-Qiang Zhong

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