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Gene Therapy of Pancreatic Cancer With Green Fluorescent Protein and Tumor Necrosis Factor–Related Apoptosis-Inducing Ligand Fusion Gene Expression Driven by a Human Telomerase Reverse Transcriptase Promoter

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Abstract

Background: Tumor necrosis factor–related apoptosis-inducing ligand (TRAIL) induces apoptosis in malignant cells but not in normal cells. Ad/g-TRAIL, an adenoviral vector in which expression of green fluorescent protein (GFP) and TRAIL is driven by a human telomerase reverse transcriptase promoter, has shown promise as a targeted antitumor agent.

Methods: To investigate the effects of TRAIL gene therapy on pancreatic cancer, BxPC-3, MIA-PaCa-2, Panc-1, and ASPC-1 cells were treated with Ad/g-TRAIL. Transfection and protein expression were determined by using immunoblotting and identification of GFP with fluorescent microscopy and flow cytometry. Cell viability was determined by proliferation assay. Cell-cycle analysis and quantification of caspase-3 were used to identify apoptosis. The in vivo efficacy of Ad/g-TRAIL was characterized in a novel red fluorescent protein murine model of MIA-PaCa-2 pancreatic cancer.

Results: Cells treated with Ad/g-TRAIL expressed GFP and exhibited apoptotic morphology within 2 days of treatment. Treatment with this vector in vitro resulted in less cell viability, increased caspase-3 activity, and a greater apoptotic fraction than treatment with controls. In vivo, treatment with Ad/g-TRAIL significantly suppressed tumor growth.

Conclusions: TRAIL gene therapy induces apoptosis of pancreatic tumor cells both in vitro and in vivo and is a promising therapy in the treatment of pancreatic cancer.

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Correspondence to Michael Bouvet MD.

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Katz, M.H., Spivack, D.E., Takimoto, S. et al. Gene Therapy of Pancreatic Cancer With Green Fluorescent Protein and Tumor Necrosis Factor–Related Apoptosis-Inducing Ligand Fusion Gene Expression Driven by a Human Telomerase Reverse Transcriptase Promoter. Ann Surg Oncol 10, 762–772 (2003). https://doi.org/10.1245/ASO.2003.01.021

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  • DOI: https://doi.org/10.1245/ASO.2003.01.021

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