| Project/Area Number |
10470370
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Pediatric surgery
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| Research Institution | Osaka University |
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Principal Investigator |
OKADA Akira Osaka University Graduate School of Medicine, Professor, 医学系研究科, 教授 (40028569)
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| Co-Investigator(Kenkyū-buntansha) |
KUSAFUKA Takeshi Osaka University Graduate School of Medicine, Assistant Professor, 医学系研究科, 助手 (70263267)
KAMATA Shinkichi Osaka University Graduate School of Medicine, Associate Professor, 医学系研究科, 助教授 (40161202)
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| Project Period (FY) |
1998 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥7,800,000 (Direct Cost: ¥7,800,000)
Fiscal Year 1999: ¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1998: ¥5,700,000 (Direct Cost: ¥5,700,000)
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| Keywords | tracheoesophageal fistula / adriamycin / three dimensional image reconstruction / development / differentiation / animal model |
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| Research Abstract |
Three dimensional image reconstruction od the developing foregut in normal and adriamycin (ADM)-induced tracheoesophageal fistula (TEF) rats.
In the nornal embryo, the lung bud appeared just below the pharyngeal foregut on day 11 and it elongated caudally to shape into the trachea as they grew. A 'tracheoesophageal septum' did not emerge. In the TEF embryos, although the lung bud appeared in a similar position on day 11, trachea and esophagus did not separate and only a common foregut tube elongated caudally, then bilateral bronchial primordia emerged directly at the level of bifurcation. furthermore, abnormal development of the notochord was evident, being retarded in separation from the foregut, finally descending along a more ventral course and bending sharply around the level of the bifurcation. The development of TEF was almost complete by day 13.
In sunnary, the trachea seemed to be formed only by caudal elingation of the lung bud in the normal embryo. In the ADM-induced TEF embryos, the upper foregut appeared to develop only into the trachea and dthis maldevelopment may be implicated in the abnormal interaction between the foregut and the surrounding mesenchyme.
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