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 Gastroenteroljournal_title
World journal of gastroenterologyauthors
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 YHdoi
10.3748/wjg.v22.i23.5342subject
Has Abstractpub_date
2016-06-21 00:00:00pages
5342-52issue
23eissn
1007-9327issn
2219-2840journal_volume
22pub_type
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