Tumor-selective replication of an oncolytic adenovirus carrying oct-3/4 response elements in murine metastatic bladder cancer models.

Tumor-selective replication of an oncolytic adenovirus carrying oct-3/4 response elements in murine metastatic bladder cancer models. Research Abstract Details 

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Tumor-selective replication of an oncolytic adenovirus carrying oct-3/4 response elements in murine metastatic bladder cancer models. Abstract Text:

Chao-Liang Wu,Gia-Shing Shieh,Chao-Ching Chang,Yi-Te Yo,Chih-Hau Su,Meng-Ya Chang,Yin-Hui Huang,Pensee Wu,Ai-Li Shiau,

PURPOSE: Oncolytic adenoviruses are attractive therapeutics for cancer because they selectively replicate in tumors. However, targeting tumor metastasis remains a major challenge for current virotherapy for cancer. Oct-3/4 is specifically expressed in embryonic stem cells and tumor cells. Oct-3/4 highly expressed in cancer cells may be a potential target for cancer therapy. We developed an E1B-55 kDa-deleted adenovirus, designated Ad.9OC, driven by nine copies of Oct-3/4 response element for treating Oct-3/4-expressing metastatic bladder cancer. EXPERIMENTAL DESIGN: We examined the expression of Oct-3/4 in human bladder tumor tissues and bladder cancer cell lines. We also evaluated the cytolytic and antitumor effects of Ad.9OC on bladder cancer cells in vitro and in vivo. RESULTS: Oct-3/4 expression was detected in bladder cancer cell lines, as well as in human bladder tumor tissues. Notably, Oct-3/4 expression was higher in metastatic compared with nonmetastatic bladder cancer cells. Ad.9OC induced higher cytolytic activity in metastatic bladder cancer cells than in their nonmetastatic counterparts, whereas it did not cause cytotoxicity in normal cells. Pharmacologic and short hairpin RNA-mediated Oct-3/4 inhibition rendered bladder cancer cells more resistant to Ad.9OC-induced cytolysis. Replication of Ad.9OC was detected in murine bladder cancer cells and bladder tumor tissues. We also showed the effectiveness of Ad.9OC for treating bladder cancer in subcutaneous, as well as metastatic, bladder tumor models. CONCLUSIONS: Ad.9OC may have therapeutic potential for treating Oct-3/4-expressing tumors. Especially, metastatic bladder tumors are good target for Ad.9OC treatment. Because Oct-3/4 is expressed in a broad spectrum of cancers, Ad.9OC may be broadly applicable.

Tumor-selective replication of an oncolytic adenovirus carrying oct-3/4 response elements in murine metastatic bladder cancer models. Publishing Authors By Initials

CL Wu,GS Shieh,CC Chang,YT Yo,CH Su,MY Chang,YH Huang,P Wu,AL Shiau,

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Tumor-selective replication of an oncolytic adenovirus carrying oct-3/4 response elements in murine metastatic bladder cancer models. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Clinical cancer research : an official journal of

VOLUME: 14

Page Numbers: 1228-38

Journal Abbreviation: Clin. Cancer Res.

ISSN: 1078-0432

DAY: 15

MONTH: Feb

YEAR: 2008

Tumor-selective replication of an oncolytic adenovirus carrying oct-3/4 response elements in murine metastatic bladder cancer models. Information

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LANGUAGE: eng

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AFFILIATION: Authors' Affiliations: Departments of Biochemistry and Molecular Biology and Microbiology and Immunology, National Cheng Kung University Medical College, Tainan, Taiwan.

Country: United States

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MEDLINETA: Clin Cancer Res

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