The effects of activation of canonical Wnt signaling on the proliferation and differentiation of gastric epithelial cells
Project/Area Number |
24790381
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Research Category |
Grant-in-Aid for Young Scientists (B)
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Allocation Type | Multi-year Fund |
Research Field |
Experimental pathology
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Research Institution | Gifu University |
Principal Investigator |
HIRATA Akihiro 岐阜大学, 生命科学総合研究支援センター, 助教 (30397327)
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Project Period (FY) |
2012-04-01 – 2015-03-31
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Project Status |
Completed (Fiscal Year 2014)
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Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2012: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
|
Keywords | 胃癌 / Wntシグナル / 細胞増殖 / 細胞分化 / 胃 / βカテニン / 胃上皮幹細胞 / β-カテニン / β-catenin / Wnt シグナル / 増殖 / 分化 |
Outline of Final Research Achievements |
Wnt/β-catenin signaling is frequently activated in gastric cancers but it remains poorly understood how Wnt signaling contributes to the gastric carcinogenesis. In the present study, we investigated the effect of activation of Wnt signaling in gastric epithelial cells using doxycycline-inducible β-catenin mice. When we fed adult mice doxycycline for 5 days, cytoplasmic and nuclear β-catenin accumulation were observed in both fundic and pyloric glands of the stomach and the number of Ki-67-positive proliferating cells significantly increased in the isthmus and gastric pits with significant decrease in mucus production. Gene expression analysis revealed that β-catenin induction led to the up-regulations of gastric and intestinal epithelial stem cell markers. Our data indicate that Wnt activation maintains gastric epithelial cells in an undifferentiated and proliferative state.
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Report
(4 results)
Research Products
(34 results)
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[Journal Article] IDO1 plays an immunosuppressive role in 2, 4, 6-trinitrobenzene sulfate-induced colitis in mice2013
Author(s)
Takamatsu M, Hirata A, Ohtaki H, Hoshi M, Hatano Y, Tomita H, Kuno T, Saito K, Hara A
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Journal Title
J Immunol
Volume: 15;191(6)
Issue: 6
Pages: 3057-64
DOI
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Peer Reviewed
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[Journal Article] Organomagnesium suppresses inflammation-associated colon carcinogenesis in male Crj: CD-1 mice.2013
Author(s)
Kuno, T., Hatano, Y., Tomita, H., Hara, A., Hirose, Y., Hirata, A., Mori, H., Terasaki, M, Masuda, S., and Tanaka, T.
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Journal Title
Carcinogenesis
Volume: 34
Issue: 2
Pages: 361-369
DOI
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Peer Reviewed
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[Journal Article] Constitutive phosphorylation of the mTORC2/Akt/4E-BP 1 pathway in newly derived canine hemangiosarcoma cell lines2012
Author(s)
Murai, A., Asa, SA., Kodama , A., Hirata, A., Yanai, T. and Sakai, H.
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Journal Title
BMC Veterinary Research
Volume: 8
Issue: 1
Pages: 128-128
DOI
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Peer Reviewed
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[Journal Article] Immunohistochemical analysis of the Akt/mTOR/4E-BP 1 signalling pathway in canine haemangiomas and haemangiosarcomas2012
Author(s)
Murai, A., Asa, SA., Kodama, A., Sakai, H., Hirata, A. and Yanai , T.
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Journal Title
Journal of Comparative Pathology
Volume: 147
Issue: 4
Pages: 430-440
DOI
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Peer Reviewed
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[Presentation] Dose-dependent roles for canonical Wnt signaling in de novo crypt formation and cell cycle properties of colonic epithelium.2012
Author(s)
Hirata A, Utikal J, Yamashita S, Aoki H, Watanabe A, Yamamoto T, Okano H, Bardeesy N, Kunisada T, Ushijima T, Hara A, Jaenisch R, Hochedlinger K and Yamada Y
Organizer
International Society for Stem Cell Research 10th Annual Meeting
Place of Presentation
Yokohama
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