2005 Fiscal Year Final Research Report Summary
Significance of transforming growth factors for ocular malignant tumors and their application in gene therapy.
| Project/Area Number |
15591873
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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 |
Ophthalmology
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| Research Institution | Wakayama Medical University |
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Principal Investigator |
OHNISHI Yoshitaka Wakayama Medical University, Ophthalmology, Professor, 医学部, 教授 (80037473)
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| Co-Investigator(Kenkyū-buntansha) |
OKADA Yuka Wakayama Medical University, Ophthalmology, Assistant Professor, 医学部, 講師 (50264891)
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| Project Period (FY) |
2003 – 2005
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| Keywords | Ocular malignant tumor / transforming growth factor / gene therapy / squamous cell carcinoma / XPC knockout mouse / Sonic hedgehog / cyclopamine |
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| Research Abstract |
The purpose of this study is to clarify the role of transforming growth factor (TGF) for ocular malignant tumors and to apply them in gene therapy. TGF signaling is required for eliciting the effects of Sonic hedgehog (Shh). Cyclopamine is a natural compound that is capable of suppression of Smoothened activity which is critical in Shh/Gli signal activation.
1. Chemical carcinogen cocktail of 9,10-dimethyl-1,2-benzanthracene and phorbol-12-myristate-13-acetate was topically applied to eyelid of XPC-null mice every two days for 2 to 8 months, and epithelial tumors developed in eyelid. These tumors were treated daily with subcutaneous ingestion of cyclopamine for 7 days. Histology showed that cylopamine treatment suppressed BrdU incorporation and induced apoptosis in the majority of cells in these tumors.
2. Squamous cell carcinoma cell line established from human burned-scar-derived SCC was used. The cells were maintained in Dulbecco's MEM. The cells were enhanced by adding recombinant Shh and this effect was abolished by adding cyclopamine. However, the proliferation of SCC cell line was not affected by adding cylopamine in the abscence of recombinant Shh.
3. Cell suspension of SCC cell line was implanted subcutaneously by using a injection needle in the back of nude mice. Ten days after implantation, the animals were treated systemic cyclopamine at every two days for three times. The SCC cells express Shh in vivo in tumor developed in nude mice and inhibition of Shh signaling pathway by cyclopamine induced apoptosis and suppressed proliferation in the tumor. Cyclopamine inhibits proliferation and induces apoptosis in epithelial tumor cells in vivo. The hedgehog pathway may be a potential therapeutic target for patients with eyelid tumors.
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Research Products
(26 results)
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[Journal Article] Inhibition of p38MAP kinase suppresses fibrotic reaction of retinal pigment epithelial cells.2005
Author(s)
Saika S, Yamanaka O, Ikeda K, Kim-Mitsuyama S, Flanders KC, Yoo J, Roberts AB, Nishikawa-Ishida I, Ohnishi Y, Muragaki Y, Ooshima A.
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Journal Title
Lab Invest. 85(7)
Pages: 838-850
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Expression of Smad7 in mouse eyes accelerates healing of corneal tissue after exposure to alkali.2005
Author(s)
Saika S, Ikeda K, Yamanaka O, Miyamoto T, Ohnishi Y, Sato M, Muragaki Y, Ooshima A, Nakajima Y, Kao WW, Flanders KC, Roberts AB.
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Journal Title
Am J Pathol. 166(5)
Pages: 1405-1418
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Therapeutic effect of topical administration of SN50, an inhibitor of nuclear factor-kappaB, in treatment of corneal alkali burns in mice.2005
Author(s)
Saika S, Miyamoto T, Yamanaka O, Kato T, Ohnishi Y, Flanders KC, Ikeda K, Nakajima Y, Kao WW, Sato M, Muragaki Y, Ooshima A.
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Journal Title
Am J Pathol. 166(5)
Pages: 1393-1403
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Smad3 signaling is required for epithelial-mesenchymal transition of lens epithelium after injury.2004
Author(s)
Saika S, Kono-Saika S, Ohnishi Y, Sato M, Muragaki Y, Ooshima A, Flanders KC, Yoo J, Anzono M, Lu C-Y, Kao WW-Y, Roberts AB.
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Journal Title
Am J Pathol. 164(2)
Pages: 651-663
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Response of lens epithelial cells to injury : role of lumican in epithelial-mesenchymal transition.2003
Author(s)
Saika S, Miyamoto T, Tanaka S, Tanaka T, Ishida I, Ohnishi Y, Ooshima A, Ishiwata T, Asano G, Chikama T-I, Shiraishi A, Liu C-Y, Kao CW-C, Kao WW-Y.
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Journal Title
Invest Ophthalmol Vis Sci 44(5)
Pages: 2094-2102
Description
「研究成果報告書概要(欧文)」より
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