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Electrophysiological and morphological study of endolymphatic sac

Research Project

Project/Area Number 02670766
Research Category

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

Allocation TypeSingle-year Grants
Research Field Otorhinolaryngology
Research InstitutionKagawa Medical School

Principal Investigator

MORI Nozomu  Kagawa Medical School, Dept. of Otolaryngology, Associate Professor, 医学部, 助教授 (90124883)

Co-Investigator(Kenkyū-buntansha) FURUTA Hiroshi  Kagawa Medical School, Dept. of Otolaryngology, Assistant, 医学部, 助手 (90209180)
Project Period (FY) 1990 – 1991
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥2,400,000 (Direct Cost: ¥2,400,000)
Fiscal Year 1991: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1990: ¥1,900,000 (Direct Cost: ¥1,900,000)
Keywordsendolymphatic sac / direct current potential / epithelial cell / catecholamine / acetazolamide / macromolecule
Research Abstract

(Electrophysiological Study)
The endolymphatic sac direct current potential(ESP)was measured in the guinea pig by means of a glass microelectrode, and the effect of anoxia and various agents on the ESP was examined to know its properties. The results are as follows : 1)The ESP is composed of an anoxia-sensitive part and an anoxiainsensitive part. 2)Canrenoate, an aldosterone antagonist, decreased the ESP in a dose-dependent manner. 3)Acetazolamide, a carbonic anhydrase inhibitor, produced a dose-dependent decrease in the ESP with a saturation of its effect at large doses. 4)Catecholamines reversibly decreased the ESP by beta-adrenergic action. 5)The anoxia-sensitive part of the ESP consists of catecholamine-sensitive and acetazolamide-spnsitve parts.
(Morphological Study)
Ultrastructure of the endolymphatic sac(ES)in the mouse and the transport of macromolecule in the ES were observed. The results are as follows : 1)The ES in the mouse was divided into three parts : proximal, intermediate and distal. 2)The epithelial cells in the intermediate portion were classified into two types : type I and type II. Type I cells had abundant microvilli, pinocytotic vesicles, vacuoles, multivesicular bodies, lysosomes and mitochondria. Type II cells had fewer numbers of these organelles. 3)The capillaries of the ES were classified as either fenestrated or non-fenestrated. They were botn considered to be permeable to macromolecules. The basolateral absorption in the ES epithelium was considered to be active especially in the intermediate portion.

Report

(3 results)
  • 1991 Annual Research Report   Final Research Report Summary
  • 1990 Annual Research Report
  • Research Products

    (23 results)

All Other

All Publications (23 results)

  • [Publications] N.Mori,N.Uozumi,K.Yura,and S.Sakai: "The difference in endocochlear and endolymphatic sac dic,potentials in response to furosemide and canrenoate as diuretics." Eur.Arch.Oborhinolaryngel.247. 371-373 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] N.Mori,N.Uozumi,and S.Sakai: "Catecholamines depress endolynphatic sac direct current potential in guinea pigs" Am.J.Physiol.259. R921-R924 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] N.Mori,and N.Uozumi: "Evidence that β_2 receptors mediate the action of catecholamines on the endolymphatic sac DC potential" Am.J.Physiol.260. R911-R915 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] N.Mori,K.Yura,N.Uozumi,and S.Sakai: "The effect of aldosterone antagonist on the DC potential in the endolymphatic sac" Ann.Otol.Rhinol.Laryngol.100. 72-75 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] H.Furuta,N.Mori,M.Fujita,and S.sakai: "Ultrastructure of the endolymphatic sac in the mouse" Acta Anatomica. 141. 193-198 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] H.Furuta,N.Mori,M.Fujita,M.Sakagami,and S.Sakai: "Capillary permeability and baso lalkral endocytic pathway of the epithelium in the mouse endolymphatic sac in vivo" ORL. 53. 321-325 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] N. Mori, N. Uozumi, K. Yura and S. Sakai: "The difference in endocochlear and endolymphatic sac DC potentials in response to furosemide and canrenoate as diuretics" Eur. Arch. Otorhinolaryngol.247. 371-373 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] N. Mori, N, Uozumi and S. Sakai: "Catecholamines depress endolymphatic sac direct current potential in guinea pig" Am. J. Physiol.259. R921-R924 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] N. Mori and N. Uozumi: "Evidence that beta_2 receptors mediate the action of catecholamines in the endolymphatic sac DC potential" Am. J. Physiol.260. R911-R915 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] N. Mori, K. Yura, N. Uozumi and S. Sakai: "The effect of aldosterone antagonist on the DC potential in the endolymphatic sac" Ann. Otol. Rhinol. Laryngol.100. 72-75 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] H. Furuta, N. Mori, M. Fujita and S. Sakai: "Ultrastructure of the endolymphatic sac in the mouse" Acta Anat.141. 193-198 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] H. Furuta, N. Mori, M. Fujita, M. Sakagami and S. Sakai: "Capillary permeability and basolateral endocytic pathway of the epithelium in the mouse endolymphatic sac in vivo" ORL. 53. 321-325 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] N.Mori,N.Uozumi,K.Yura,and S.Sakai: "The difference in endocochlear and endolymphatic sac dic.potentials in response to furosemide and canrenoate as diuretics." Eur.Arch.Otorhinolaryngol.247. 371-373 (1990)

    • Related Report
      1991 Annual Research Report
  • [Publications] N.Mori,N.Uozumi,and S.Sakai: "Catecholamines depress endolymphatic sac direct current potential in guinea pigs" Am.J.Physiol.259. R921-R924 (1990)

    • Related Report
      1991 Annual Research Report
  • [Publications] N.Mori,and N.Uozumi: "Evidence that β_2 receptors mediate the action of catecholamines on the endolymphatic sac DC potential" Am.J.Physiol.260. R911-R915 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] N.Mori,K.Yura,N.Uozumi,and S.Sakai: "The effect of aldosterone antagonist on the DC potential in the endolymphatic sac" Ann.Otol.Rhinol.Laryngol.100. 72-75 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] H.Furuta,N.Mori,M.Fujita,and S.Sakai: "Ultrastructure of the endolymphatic sac in the mouse" Acta Anatomica. 141. 193-198 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] H.Furuta,N.Mori,M.Fujita,M.Sakagami,and S.Sakai: "Capillary permeability and basolateral endocytic pathway of the epithelium in the mouse endolymphatic sac in vivo" ORL. 53. 321-325 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] N.Mori,N.Uozumi,K.Yura,and S.Sakai: "The difference in endocochlear and endolymphatic sac d.c.potentials in response to furosemide and canrenoate as diuretics" Eur.Arch.Otorhinolaryngol.247. 371-373 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] N.Mori,N.Uozumi,and S.Sakai: "Catecholamines depress endolymphatic sac direct current potential in guinea pigs" Am.J.Physiol.259. R921-R924 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 古田 浩、森 望、酒井 俊一、藤田 守: "正常マウス内リンパ嚢の超微形態学的観察" Ear Res.Jpn.21. 113-114 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] N.Mori,K.Yura,N.Uozumi,and S.Sakai: "Effect of aldosterone antagonist on the DC potential in the endo lymphatic sac." Ann.Otol.Rhiaol.Laryngol.100. 72-75 (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] 森 望: "内耳電位とホルモン" 耳鼻臨床. 補41. 170-174 (1991)

    • Related Report
      1990 Annual Research Report

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Published: 1990-04-01   Modified: 2016-04-21  

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