Subcloning and characterization of highly metastatic cells derived from human esophageal squamous cell carcinoma KYSE150 cells by in vivo selection
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Masafumi Okuda1,2, Jun Inoue1,3, Naoto Fujiwara1,2, Tatsuyuki Kawano2, Johji Inazawa1,3
1Department of Molecular Cytogenetics, Medical Research Institute and Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
2Department of Gastrointestinal Surgery, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
3Bioresource Research Center, Research and Industry-University Alliance Organization, Tokyo Medical and Dental University, Tokyo, Japan
Johji Inazawa, email: firstname.lastname@example.org
Keywords: lung metastasis, esophageal squamous cell carcinoma (ESCC), in vivo selection, cytokine, inflammation
Received: February 07, 2017 Accepted: March 19, 2017 Published: March 29, 2017
Esophageal cancer is the eighth most common cancer and the sixth most common cause of cancer-related deaths worldwide. Despite the research progress in understanding the disease, the mechanism underlying the metastasis is still unclear. Here, we successfully generated a highly metastatic cell subline, designated as KYSE150-LuM, derived from an esophageal squamous cell carcinoma cell line (KYSE150) by in vivo selection. To elucidate the mechanisms driving metastasis, we characterized the gene expression differences between LuM cells and parent KYSE150 cells. IL-6, IL-1β, and LCN2, previously associated with tumor growth and metastasis, were up-regulated in LuM cells. Recent studies on cancer have increasingly focused on the tumor microenvironment, from which these cytokines are released. The fact that these three cytokines (IL-6, IL-1β, LCN2) were up-regulated in LuM cells indicates that these highly metastatic cells obtained through in vivo selection will be a useful resource for further studies on elucidating the mechanisms underlying the tumor microenvironment which is associated with cytokine-related tumor growth and metastasis. Moreover, LuM cells could disseminate to the lung in shorter period of time in vivo, indicating their utility for in vivo experiments of metastasis and new therapeutic targets in a shorter period of time than currently possible.
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