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ADP-overexpressing adenovirus elicits enhanced cytopathic effect by induction of apoptosis

Other Titles
 ADP-overexpressing adenovirus elicits enhanced cytopathic effect by induction of apoptosis 
Authors
 Chae-Ok Yun  ;  Eunhee Kim  ;  Taeyoung Koo  ;  Hoguen Kim  ;  Young-sook Lee  ;  Joo-Hang Kim 
Citation
 Cancer Gene Therapy, Vol.12(1) : 61-71, 2005 
Journal Title
 Cancer Gene Therapy 
ISSN
 0929-1903 
Issue Date
2005
Abstract
Replication-competent adenoviruses (Ad's) are emerging as a promising new modality for treatment of cancer. Selective replication of viral agents in tumor may lead to improved efficacy over nonreplicating Ad's due to their inherent ability to multiply, lyse, and spread to surrounding cells. We have previously shown that an E1B 55 kDa-deleted adenovirus (YKL-1) exhibits tumor-specific replication and cell lysis, but its cytolytic effects were reduced in comparison to the wild-type adenovirus. To increase the oncolytic potency of YKL-1, we have reintroduced the Ad death protein (ADP) gene under the control of either a CMV or an MLP promoter at the E3 region of YKL-1, generating YKL-cADP and YKL-mADP Ad's, respectively. ADP is an 11.6 kDa protein encoded by the E3 transcription unit, and is required to kill adenovirus-infected cells efficiently. However, to date, the mechanism by which ADP mediates cell death has not been clearly defined. In this study, we report that ADP-overexpressing Ad markedly enhanced cytolytic effect (up to 100-fold) against all tumor cell lines tested, but did not increase cytopathic effect in normal skin fibroblast, BJ. Moreover, plaque size formed by YKL-cADP was substantially larger than that of YKL-1, indicating an enhancement in cell lysis. TUNEL (terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling) assay and Annexin-V/PI double staining indicate that ADP-mediated cytotoxicity was largely driven by apoptosis. Finally, YKL-cADP adenovirus also showed superior antitumor effect than YKL-1 and YKL-mADP in C33A cervical and Hep3B hepatoma xenograft tumor models. Taken together, these lines of evidence demonstrate that the newly generated adenovirus expressing ADP under the CMV promoter induces efficient but tumor-selective cell lysis, which is critical for adding therapeutic value to replicating adenovirus for its use in cancer gene therapy.
Full Text
http://www.nature.com/cgt/journal/v12/n1/full/7700769a.html
DOI
10.1038/sj.cgt.7700769
Appears in Collections:
1. College of Medicine (의과대학) > Yonsei Biomedical Research Center (연세의생명연구원) > 1. Journal Papers
1. College of Medicine (의과대학) > Dept. of Pathology (병리학교실) > 1. Journal Papers
5. Research Institutes (연구소) > Institute for Cancer Research (암연구소) > 1. Journal Papers
1. College of Medicine (의과대학) > Dept. of Internal Medicine (내과학교실) > 1. Journal Papers
Yonsei Authors
구태영(Koo, Taeyoung)
김은희(Kim, Eun Hee)
김주항(Kim, Joo Hang)
김호근(Kim, Ho Keun)
윤채옥(Yun, Chae Ok)
이영숙(Lee, Young Sook)
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URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/147515
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