Journal Article

Overexpression of cyclin B1 in human esophageal squamous cell carcinoma cells induces tumor cell invasive growth and metastasis

Yongmei Song, Chunling Zhao, Lijia Dong, Ming Fu, Liyan Xue, Zhen Huang, Tong Tong, Zhuan Zhou, Amei Chen, Zhihua Yang, Ning Lu and Qimin Zhan

in Carcinogenesis

Volume 29, issue 2, pages 307-315
Published in print February 2008 | ISSN: 0143-3334
Published online November 2007 | e-ISSN: 1460-2180 | DOI: http://dx.doi.org/10.1093/carcin/bgm269
Overexpression of cyclin B1 in human esophageal squamous cell carcinoma cells induces tumor cell invasive growth and metastasis

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Cyclin B1, a key component in the control of cell cycle progression from G2 to M phase, has been implicated in tumorigenesis and the development of malignancy. However, the underlying mechanism by which cyclin B1 acts as an important oncogenic molecule remains largely unknown. Here we show that ectopic expression of cyclin B1 promotes cell proliferation, enhances cell motility and migration and results in increased ability of cells extravasating through the capillary endothelium. Interestingly, isogenic esophageal squamous cell carcinoma (ESCC) cells overexpressing cyclin B1 reveal strong invasive growth and high potential of metastasis to lung in xenograft mice. Suppression of cyclin B1 expression via small interfering RNA approach in high-metastatic esophagus carcinoma cells specifically inhibits their ability to metastasize from the primary ESCC to lung. Notably, altered expression of epithelial markers and mesenchymal markers were observed in the cells overexpressing cyclin B1, suggesting that cyclin B1 contributes to metastasis probably by promoting an epithelial–mesenchymal transition. These results establish a mechanistic link between cyclin B1 and ESCC metastasis and provide novel insight into understanding of cyclin B1 in the development of ESCC malignancy.

Journal Article.  6619 words.  Illustrated.

Subjects: Clinical Cytogenetics and Molecular Genetics

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