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Involvement of apoptosis in the detaching process of the epithelial primordium

Research Project

Project/Area Number 10640649
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 生物形態・構造
Research InstitutionNiigata University

Principal Investigator

WATANABE Yuichi  Niigata University, Faculty of Science, Professor, 理学部, 教授 (30035480)

Project Period (FY) 1998 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1999: ¥800,000 (Direct Cost: ¥800,000)
KeywordsApoptosis / Epithelial Rudiment / Rat Fetus / Development / Rathke's Pouch / 器官発生 / ラット / 腺性下垂体 / 甲状腺
Research Abstract

The present study was conducted to investigate to what extent apoptosis is involved in the process of detachment of the adenohypophysial primordium from the oral epithelium. For this purpose, sections including hypophysial rudiment of the 12- to 14-day-old rat fetuses was examined by using an in situ end labelling (TUNEL) method. Massive apoptosis was observed in the oral epithelium when the adenohypophysial primordium closes to form Rathke's pouch. Apoptotic cell death of the oral epithelium was not confined to the closing pouch but it was seen along the midline of the stomodeal roof. In observing closing Rathke's pouch, the apoptotic cells was frequently seen in the oral epithelium itself but it was less frequent in the adoral constricted part. Moreover, the incidence of cell death in the epithelial constriction was variable among individuals. In some fetuses, epithelial cells were found to be incorporated into the hypophysial primordium without degeneration. Such incomplete degenerative process of epithelial component is discussed in relation to the frequent presence of epithelial cysts in the adult rat adenohypophysis.

Report

(3 results)
  • 1999 Annual Research Report   Final Research Report Summary
  • 1998 Annual Research Report
  • Research Products

    (9 results)

All Other

All Publications (9 results)

  • [Publications] Hosoya: "Immunocytochemical studies on the cellular origin of ectopic striated muscle fibers in monolayer cultures of rat"Zoological Science. 15. 247-253 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Sato: "Corticosteroids stimulate the differentiation of growth hormone cells but suppress that of prolactin cells in the fetal rt pituitary"Archives Histodogy and Cytology. 61. 75-81 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Matsumoto: "Differentiating ability of the pars intermedia in hypothalectomized frog tadpoles"General and Comparative Endocrinology. 117(未定). (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] O. Hosoya: "Immunohistochemical studies on the cellular origin of ectopic striated muscle fibers in monolayer cultures of rat"Zoological Science. Vol. 15, No. 2. 247-253 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] K. Sato: "Corticosteroids stimulate the differentiation of growth hormone cells but suppress that of prolactin cells in the fetal rat pituitary"Archives Histol. Cytol.. Vol. 61, No. 1. 75-81 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] M. Matsumoto: "Differentiating ability of the pars intermedia in hypothalectomized frog tadpoles"Gen. Comp. Endocrinol.. Vol. 117 (in press). (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Hosoya: "Immunocytochemical studies on the cellular origin of ectopic striated muscle fibers in monolayer cultures of rat"Zoological Science. 15巻2号. 247-253 (1998)

    • Related Report
      1999 Annual Research Report
  • [Publications] Sato: "Corticosteroids stimulate the differentiation of growth hormone cells but suppress that of prolactin cells in the fetal rat pituitary"Archives Histology and Cytology. 61巻1号. 75-81 (1998)

    • Related Report
      1999 Annual Research Report
  • [Publications] Matsumoto: "Differentiating ability of the parts intermedia in hypothelectomized frog tadpoles"General and Comparative Enclocrinology. 117巻(予定). (2000)

    • Related Report
      1999 Annual Research Report

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Published: 1999-04-01   Modified: 2016-04-21  

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