Tumor-specific expression of shVEGF and suicide gene as a novel strategy for esophageal cancer therapy.

Abstract:

AIM:To develop a potent and safe gene therapy for esophageal cancer. METHODS:An expression vector carrying fusion suicide gene (yCDglyTK) and shRNA against vascular endothelial growth factor (VEGF) was constructed and delivered into EC9706 esophageal cancer cells by calcium phosphate nanoparticles (CPNP). To achieve tumor selectivity, expression of the fusion suicide gene was driven by a tumor-specific human telomerase reverse transcriptase (hTERT) promoter. The biologic properties and therapeutic efficiency of the vector, in the presence of prodrug 5-fluorocytosine (5-FC), were evaluated in vitro and in vivo. RESULTS:Both in vitro and in vivo testing showed that the expression vector was efficiently introduced by CPNP into tumor cells, leading to cellular expression of yCDglyTK and decreased VEGF level. With exposure to 5-FC, it exhibited strong anti-tumor effects against esophageal cancer. Combination of VEGF shRNA with the fusion suicide gene demonstrated strong anti-tumor activity. CONCLUSION:The shVEGF-hTERT-yCDglyTK/5-FC system provided a novel approach for esophageal cancer-targeted gene therapy.

journal_name

World J Gastroenterol

authors

Liu T,Wu HJ,Liang Y,Liang XJ,Huang HC,Zhao YZ,Liao QC,Chen YQ,Leng AM,Yuan WJ,Zhang GY,Peng J,Chen YH

doi

10.3748/wjg.v22.i23.5342

subject

Has Abstract

pub_date

2016-06-21 00:00:00

pages

5342-52

issue

23

eissn

1007-9327

issn

2219-2840

journal_volume

22

pub_type

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