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Ultrastructure and kinetics of the apical vesicles of the stria vascularis epithelial cell of the inner ear.

Research Project

Project/Area Number 03670012
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field General anatomy (including Histology/Embryology)
Research InstitutionKochi Medical School

Principal Investigator

OKADA Teruhiko  Kochi Medical School, associate professor, 医学部, 助教授 (00025628)

Co-Investigator(Kenkyū-buntansha) KOBAYASHI Toshihiro  Kochi Medical School, 医学部, 助手 (40153621)
SEGUCHI Harumichi  Kochi Medical School, 医学部, 教授 (90030866)
Project Period (FY) 1991 – 1992
Project Status Completed (Fiscal Year 1992)
Budget Amount *help
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1992: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1991: ¥1,400,000 (Direct Cost: ¥1,400,000)
KeywordsStria vascularis / Cationized ferritin / Histochemistry / ACPase / TMPase / Na-K-ATPase / Ca-ATPase / Mg-ATPase / Mg-ATPase / CaーATPase / MgーATPase / NaーKーATPase
Research Abstract

The localization of ion-transporting enzyme activity and the endocytic process of cationized ferritin (CF) were electron microscopically investigated in the guinea pig stria vascularis.
Na-K-ATPase activity was localized in basolateral infolding of marginal cells of the sria vascularis. Ca-ATPase activity was detected in the limiting membrane of the large endosomal vacuoles and the luminal plasma membrane of the marginal cells. Mg-ATPase activity was found in the lateral plasma membrane of the marginal cells.
CF was first observed scattered on the luminal surface of the marginal cells. Then it was internalized in the form of coated vesicles and transported to the large vacuolar endosomes. At 5 min after CF injection, CF particles were mainly localized in the coated vesicles, and at 15 min, they appeared in large vacuoles. At 60 min, multivesicular bodies provided with several internal vesicles were havily labeled with CF.At 2 hours, the content of the multivesicular bodies condensed and internal vesicles, a granular substance of moderate to high density and membrane remants become clearly visible. These multivesicular bodies were havily labeled with clustered CF particles.

Report

(3 results)
  • 1992 Annual Research Report   Final Research Report Summary
  • 1991 Annual Research Report
  • Research Products

    (7 results)

All Other

All Publications (7 results)

  • [Publications] T.Okada et al.: "Endocytosis of cationized ferritin in the marginal cells of the guinea pig stria vascularis." Journal of Electron Microscopy. 41. 320- (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] N.Kanoh et al.: "Ultracytochemical study of ouabain-sensitive K^+-dependent p-nitrophenylphosphatase activity in stria vascularis of reserpinized guinea pig.in press" Acta Oto-laryngologica(Stockholm). 113. (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] T.Okada, T.Kobayashi, E.Garcia and H.Seguchi: "Endocytosis of cationized ferritin in the marginal cells of the guinea pig stria vascularis" Journal of Electron Microscopy. 41(4). 320 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] N.Kanoh, T.Kumoi, T.Kobayashi, T.Okada and H.Seguchi: "Ultracytochemical study of ouabain-sensitive K^+-dependent p-nitrophenyl-phosphatase activity in stria vascularis of reserpinized guinea pigs" Acta Oto-laryngologica. 113, (in press). (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] T.Okada et al.: "Endocytosis of cationized ferritin in the marginal cells of the guinea pig stria vascularis." Journal of Electron Microscopy. 41. 320 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] N.Kanoh et al.: "Ultracytochemical study of ouabain-sensitive K^+-dependent p-nitrophenylphosphatase activity in stria vascularis of reserpinized guinea pig." Acta Oto-laryngologica (Stockholm). 113. (1993)

    • Related Report
      1992 Annual Research Report
  • [Publications] 岡田 暉彦: "血管条の辺縁細胞の頂部細胞質にみられる小胞および多胞小胞へのカチオン化フェリチンの取り込み" Journal of Electron Microscopy. 42. (1992)

    • Related Report
      1991 Annual Research Report

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Published: 1991-04-01   Modified: 2016-04-21  

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