Volume 123, Issue 8 pp. 1779-1786
Cancer Cell Biology

Oral cancer overexpressed 1 (ORAOV1): A regulator for the cell growth and tumor angiogenesis in oral squamous cell carcinoma

Lu Jiang

Lu Jiang

State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, Chengdu, China

The first two authors contributed equally to this paper.

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Xin Zeng

Xin Zeng

State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, Chengdu, China

The first two authors contributed equally to this paper.

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Hanshuo Yang

Hanshuo Yang

State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, West China Medical School, Sichuan University, Chengdu, China

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Zhi Wang

Zhi Wang

State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, Chengdu, China

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Jun Shen

Jun Shen

State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, Chengdu, China

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Jingping Bai

Jingping Bai

State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, Chengdu, China

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Yuanyuan Zhang

Yuanyuan Zhang

State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, Chengdu, China

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Feng Gao

Feng Gao

State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, Chengdu, China

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Min Zhou

Min Zhou

State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, Chengdu, China

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Qianming Chen

Corresponding Author

Qianming Chen

State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, Chengdu, China

Fax: +86-28-85405251

State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, No. 14, Sec.3, Renminnan Road, Chengdu, Sichuan, 610041, ChinaSearch for more papers by this author
First published: 13 August 2008
Citations: 53

Abstract

Oral Cancer Overexpressed 1 (ORAOV1) is a novel gene locating at chromosome band 11q13. Recent studies have suggested its role as a candidate oncogene in oral squamous cell carcinoma (OSCC) and its prognostic value for patients with OSCC. Till now, the detailed function of ORAOV1 in OSCC has remained undefined. In this study, we have investigated the role of ORAOV1 in OSCC tumorigenesis by down-regulating its expression. Small interfering RNA (siRNA) has been applied to inhibit the expression of ORAOV1 in OSCC cells. We found that the OSCC cells with reduced ORAOV1 showed retarded cell growth in vitro and displayed inhibition in both tumor growth and tumor angiogenesis in vivo. Further analyses reveal that the retarded cell growth is associated with an increase in apoptosis involving the activation of caspase 3-dependent pathway and a cell cycle arrest at the S-phase with a downregulation of cyclin A, cyclin B1 and cdc2. The suppressed tumor growth in vivo may be attributed to synergistic effect between inhibition in cell growth and suppression of tumor angiogenesis. The latter is most likely because of a suppression of VEGF. Taken together, we demonstrate that ORAOV1 plays pivotal roles in the growth and angiogenesis of OSCC. Thus, ORAOV1 may be a novel target that could be explored to develop therapeutic strategy in OSCC management. © 2008 Wiley-Liss, Inc.

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