| Project/Area Number |
03454324
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Digestive surgery
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| Research Institution | Kagoshima University |
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Principal Investigator |
YAMADA Kazutaka (1993) Kagoshima University School of Medicine, 1st Dept.of Surgery, lecturer, 医学部・附属病院, 助手 (40210439)
島津 久明 (1991-1992) 鹿児島大学, 医学部, 教授 (30010242)
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| Co-Investigator(Kenkyū-buntansha) |
MURAMATSU Hisako Kagoshima University School of Medicine, 2nd Dpt.Biochemistry, lecturer, 医学部, 助手 (50182134)
AIKOU Takashi Kagoshima University School of Medicine, 1st Dept.of Surgery, associate professo, 医学部, 助教授 (60117471)
TAKAO Sonshin Kagoshima University School of Medicine, 1st Dept.of Surgery, lecturer, 医学部・附属病院, 助手 (80171411)
山田 一隆 鹿児島大学, 医学部, 助手 (40210439)
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| Project Period (FY) |
1991 – 1993
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| Project Status |
Completed (Fiscal Year 1993)
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| Budget Amount *help |
¥6,300,000 (Direct Cost: ¥6,300,000)
Fiscal Year 1993: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1992: ¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1991: ¥3,400,000 (Direct Cost: ¥3,400,000)
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| Keywords | Carcinoma of digestive tract / Invasive potentiality to the basement membrane / Invasion MTT assay / Type IV collagenase / Metastasis / Tumor xenografted in nude mice / 悪性度 / 軽移 / 浸潤 / ヌ-ドマウス移植腫瘍 |
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| Research Abstract |
We have established the method of in vitro quantitative assay (invasion MTT assay) for studying invasive potentiality and metastatic behavior of the cancer cells using carcinomas of the digestive tract. The invasive potentiality to the basement membrane was estimated as percent invasion, that is the occurrence of the seeded cells in the cell chamber which penetrate through the basement membrane (percentage of the invaded cells to the seeded cells). The percent invasion values of tumors with liver metastasis were significantly higher than those of tumors without metastasis (p<0.001), although, it did not correlate with both type IV collagenase activity and cell capability of the adhesion, chemotaxis, and proliferation. The type IV collagenase activity was significantly higher in patients with liver metastasis, suggesting it has an important role to accelerate the liver metastasis.
Clinicopathological parameters in 906 patients with carcinomas of the digestive tract were studied to know prediction capability for the liver metastasis using univariate analysis, resulting that vessel invasion and lymph node metastasis were the significant parameters. Using those parameters for the prediction, its specificity was more than 90% but sensitivity was less than 20%. Whereas, the percent invasion was measured using 30 tumors xenografted in nude mice obtained from the 906 patients. Its specificity for the prediction was 90% and sensitivity was 70%. An assessment of invasive potentiality to the basement membrane using the invasion MTT assay seemed to be useful method for predicting the liver metastasis form carcinomas of the digestive tract.
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