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Title 

Targeted therapy of DNA tumor virus-associated cancers using virus-activated transcription factors

Authors 

M J LimS H MinJ J LeeI C KimJ T KimDong Chul LeeNam-Soon KimS JeongM N KimK D KimJ S LimSang Bae HanHwan Mook KimD S HeoYoung Il Yeom

Publisher 

Elsevier

Issue Date 

2006

Citation 

Molecular Therapy, vol. 13, no. 5, pp. 899-909

Keywords 

cancerDNA tumor virusE2F transcription factorsgene therapytumor-specific gene expressionadenovirus vectortranscription factortranscription factor E2Ftranscription factor nf1transcription factor Sp1

Abstract 

DNA tumor virus-mediated tumorigenic processes typically involve functional inactivation of cellular tumor suppressors pRB and p53 by viral oncoproteins, with concomitant activation of oncogenic transcription factors such as E2Fs. This feature could be exploited to design a treatment for corresponding malignancies. Here, we report a gene therapy strategy for DNA tumor virus-associated cancers using a synthetic, E2F-regulated gene expression system named pESM6. This system contains multimerized E2F-responsive elements in combination with the binding sites for ubiquitous transcription factors Sp1 and CTF/NF1. pESM6 could drive a high-level transgene expression comparable to that of the CMV IE promoter and exert constitutive activity in cells expressing DNA tumor viral oncogenes. In contrast, it was effectively repressed by pRB and thus only minimally active in nontransformed cells. Expression of cytosine deaminase from pESM6 resulted in a highly efficient and specific killing of HPV-transformed fibroblasts (C3) after treatment with the prodrug 5-fluorocytosine. Also, an effective tumor mass reduction was observed when the vector was injected directly into C3 tumors implanted in C57BL/6 mice. pESM6 showed a superior performance throughout these experiments compared to the previously known E2F-regulated gene vector. These results clearly demonstrate the potential usability of pESM6 for the gene therapy of DNA tumor virus-associated cancers.

ISSN 

1525-0016

Link 

http://dx.doi.org/10.1016/j.ymthe.2005.11.023

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2017-04-19


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