2009 Fiscal Year Final Research Report
Identification of Cancer Stem Cells in Murine Tumors
Project/Area Number |
20790300
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Research Category |
Grant-in-Aid for Young Scientists (B)
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Allocation Type | Single-year Grants |
Research Field |
Experimental pathology
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Research Institution | Gifu University |
Principal Investigator |
HIRATA Akihiro Gifu University, 生命科学総合研究支援センター, 助教 (30397327)
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Project Period (FY) |
2008 – 2009
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Keywords | がん幹細胞 / 大腸がん / 組織幹細胞 / β-カテニン / Wntシグナル伝達経路 |
Research Abstract |
The presence of cancer stem cells in murine colon tumors was investigated, focusing on the common characteristics with tissue stem cells. Firstly, we examined the underling mechanisms on the control of cellular differentiation and proliferation in the normal colon epithelium and found that the induction of higher level of β-catenin induced the colonic stem cells dividing slowly. Next, we examined the expression pattern of β-catenin in murine colon tumors and found the cells expressing a higher level of β-catenin and dividing more slowly than surrounding tumor cells, indicating the presence of cancer stem-like cells in murine colon tumors.
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[Journal Article] Roles of cyclooxygenase-2 and microsomal prostaglandin E synthase-1 expression and β-catenin activation in gastric carcinogenesis in N-methyl-N-nitrosourea-treated K19-C2mE transgenic mice.2008
Author(s)
Takasu S, Tsukamoto T, Cao X, Toyoda T, Hirata A, Ban H, Yamamoto M, Sakai H, Yanai T, Masegi T, Oshima M, Tatematsu M.
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Journal Title
Cancer Science. 99(12)
Pages: 2356-2364
Peer Reviewed
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[Journal Article] Carcinogenic risk of heterocyclic amines in combination-assessment with a liver initiation model.2008
Author(s)
Hirata A, Tsukamoto T, Sakai H, Takasu S, Ban H, Imai T, Totsuka Y, Nishigaki R, Wakabayashi K, Yanai T, Masegi T, Tatematsu M.
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Journal Title
Food and Chemical Toxicology. 46(6)
Pages: 2003-2009
Peer Reviewed
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[Journal Article] Further upregulation of β-catenin/Tcf transcription is involved in the development of macroscopic tumors in the colon Apc^<Min/+> mice.2008
Author(s)
Oyama T, Yamada Y, Hata K, Tomita H, Hirata A, Sheng H, Hara A, Aoki H, Kunisada T, Yamashita S, Mori H.
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Journal Title
Carcinogenesis. 29(3)
Pages: 666-672
Peer Reviewed
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[Remarks] 第26回日本毒性病理学会会長賞(優秀賞)受賞演題:「DNA低メチル化(Global DNA hypomethylation)の胃発がん抑制作用-メチル基転移酵素Dnmt1低発現マウスによる検討-」
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[Remarks] 第25回日本毒性病理学会会長賞(最優秀賞)受賞演題:「Wnt pathwayによる大腸上皮細胞の増殖制御: β-catenin inducibleマウスによる検討」