2006 Fiscal Year Final Research Report Summary
Detection and clinical application of Stem Cell Factor in Squamous cell tissue and cancer.
| Project/Area Number |
17591391
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Digestive surgery
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| Research Institution | Nagoya University |
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Principal Investigator |
NOMOTO Shuji Nagoya University, University Hospital, Research Associate, 医学部附属病院, 助手 (40300967)
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| Co-Investigator(Kenkyū-buntansha) |
KOIKE Masahiko Nagoya University, University Hospital, Research Associate, 医学部附属病院, 助手 (10378094)
NAKAO Akimasa Nagoya University, Graduate School of Medicine, Professor, 大学院・医学系研究科, 教授 (70167542)
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| Project Period (FY) |
2005 – 2006
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| Keywords | squamous cell factor / Stem Cell Factor / Sox-2 gene / expression / mRNA / protein / promoter / tumor marker |
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| Research Abstract |
I : Search and identification of the oncogenic transactivated target genes by Sox-2 as the Stem cell factor in squamous cancer cells : We compared the total RNA with or without Sox-2 expression in 293 cells using Affimetrix micro-array chip to obtain the profile. In the profile, we found two candidate oncogenes transactivated by Sox-2 expression, and two tumor suppressor genes transrepressed by its expression.
II : Detecting genes which regulate Sox-2 expression: We cloned an about 500 bp fragment of the promoter region of Sox-2 gene. We sub-cloned the fragment into the pGL3 vector to analyze a promoter. We thus will be able to detect transcription activators or repressors of Sox-2 gene expression by the analysis.
III : Clinical application of Sox-2 gene as the Stem cell factor for squamous cell cancer : We studied the possibilities of its usefulness as a tumor marker for squamous cell cancer by quantitative detection of Sox-2 mRNA in perioperative peripheral blood. Sox-2 mRNA which was detectable in the peripheral blood before operation, could no longer be detected at 14 postoperative days in 5 of 8 esophageal cancer patients.
IV : Gene amplification of Sox-2 gene: Sox-2 gene locates at 3q26-27, where genome amplification is detected in various cancer tissues. We detected genome amplification in 12 of 60 cases in esophageal cancer by Southern blot technique. The finding suggests that Sox-2 gene is an oncogene for the squamous cell cancer.
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