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Ultrastructural basis of plasmalemma-cytoskeleton interaction

Research Project

Project/Area Number 06454139
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field General anatomy (including Histology/Embryology)
Research InstitutionGUNMA UNIVERSITY SCHOOL OF MEDICINE

Principal Investigator

ISHIKAWA Harunori  Gunma University School of Medicine, Professor, 医学部, 教授 (90010058)

Co-Investigator(Kenkyū-buntansha) HIJIKATA Takao  Gunma University School of Medicine, Assistant, 医学部, 助手 (70189786)
FUJIMAKI Noboru  Gunma University School of Medicine, Lecturer, 医学部, 講師 (10008261)
嶋田 修  群馬大学, 医学部, 助手 (80196477)
Project Period (FY) 1994 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥7,600,000 (Direct Cost: ¥7,600,000)
Fiscal Year 1996: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1995: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1994: ¥5,700,000 (Direct Cost: ¥5,700,000)
KeywordsPlasmalemm / cytoskeleton / plasmalemmal undercoat / actin bundle / microtubule / electron microscopy / ジストロフィン / ラミニン / 微小管 / 神経軸索 / 電子顕微鏡
Research Abstract

The present research project was to elucidate the ultrastructural and molecular organization of the association of cytoskeletal components to the plasmalemma and the involvement of plasmalemmal undercoat to such an association. The results obtained were as follows.
1) Occurrence of fasciculated microtubules at the nodes of Ranvier
Fascicles of microtubules, previously considered to be unique to the initial segments of myelinated axons, were found at the nodes of Ranvier of sensory and motor axones in the rat spinal roots, though their occurrence was limited to the proximal portion of the axons. Microtubules in the fascicles were characteristically cross-linked by short filamentous strands at a center-to-center distance of 36-4Onm. These findings suggest that cross-linking proteins for fasciculation may be transported along the axon to fasciculate microtubules at some proximal nodes of Ranvier.
2) Actin bundles in epithelial cells of hair follicles
The whole-mount preparations of human grow … More ing hair follicles stained with fluorescent dye-labeled phalloidin were examined by confocal laser microscopy. As the results, it was shown that the innermost and outermost cell layers of the outer root sheath contained well developed bundles of actin filaments. The distribution and arrangement of such actin bundles varied in different parts of the hair follicle, but actin bundles were seen to be arranged circumferetial to the follicle axis. Ultrastructurally, bundles of actin filaments spanned the cytoplasm from one cell-cell adherens junction to another, thus forming multicellular networks of actin bundles. Actin bundles also contained myosin, alpha-actinin and vinculin. These findings suggest that actin bundles with their contractile property may be actively involved in hair follicle growth.
3) Structural array from dystrophin to laminin across the sarcolemma in skeletal muscle fibers
The relationship of dystrophin, dystroglycan complex and laminin was ultrastructurally and biochemically examined using crude sarcolemmal vesicles to elucidate the molecular array from dystrophin to laminin across the sarcolemma. Vesicles derived from the sarcolemma were well identified and used for the study of reassociation of exogenous laminin with the sarcolemma. Laminin molecules were specifically reassociated with the sarcolemmal vesicles through fine projections, which, could be shown to represent dystroglycan complexes. It was thus comfirmed ultrastructurally that dystrophin bound to dystroglycan complexes, with which laminin was associated, forming a molecular array from dystrophin to laminin through the sarcolemma. Less

Report

(4 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • 1994 Annual Research Report
  • Research Products

    (20 results)

All Other

All Publications (20 results)

  • [Publications] Furumura,M.: "Actin bundles in human hair follicles as revealed by confocal laser microscopy." Cell & Tissue Res.283 3. 425-434 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Peachey,L.D.: "Correlated confocal and IVEM imaging of the same cells using sequential fluorescence labeling,fixation,and criticalpont." Scanning. (in press).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 石川春律: "組織細胞化学 1996 (分担執筆)" 学際企画, 208 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Furumura, M.and Ishikawa, H.: "Actin bundles in human hair follicles as revealed by confocal laser microscopy." Cell & Tissue Res.283 (3). 425-434 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Peachey, L.D., Ishikawa, H.and Murakami.T.: "Correlated confocal and intermediate voltage electron microscopy imaging of the same cells using sequential fluorescence labeling, fixation, and critical point dehydration." Scanning. (In press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Ishikawa, H.: Confocal lazer microscopy. In : Histochemistry and Cytochemistry 1996 (Edited by Japanese Sosiety of Histochemistry and Cytochemistry) (In Japaness). Gakusai-Kikaku, Tokyo, 19-23 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Furumura,M.: "Actin bundles in human hair follicles as revealed by confocal laser microscopy." Cell & Tissue Res.283 3. 425-434 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Peachey,L.D.: "Correlated confocal and IVEM imaging of the same cells using sequential fluorescence labeling,fixation,and criticalpont." Scanning. (in press).

    • Related Report
      1996 Annual Research Report
  • [Publications] 石川春律: "組織細胞化学 1996 (分担執筆)" 学際企画, 208 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Nakazawa, E.: "Occurrence of fasciculated microtubules at the node of Ranvier in rat spinal roots." J. Neurocytol.24. 399-407 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Ohnishi, H.: "Conversion of amylase-secreting rat pancreatic AR42J cells to neuronlike cells by activin A." J. Clin, Invest.95. 2304-2314 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Kano, S.: "Localization of 47 kD antigenic polypeptides in Mararia parasites by confocal laser scanning microscopy." Bioimages. 3. 13-17 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 石川春律(分担): "新筋肉病学(杉田秀夫・小澤金英二郎・埜中征哉編)" 南江堂, 946 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 石川春律(分担): "新しい光学顕微鏡、第二巻、共焦点レーザ顕微鏡の医学、生物学への応用" 学際企画, 199 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Murakami,T.: "Confocal microscopic 3D visualization of membranous organelles in living cultured fibroblasts" Bioimages. 2. 21-28 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Katoh,K.: "Organization of the cytoskeleton during cellularization in Drosophila melanogaster embryos; Confocal laser and fluorescence" Bioimages. 2. 59-69 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Nagano,T.: "Morphological studies on the wall components of seminiferous and epididymal tubules in rodent in relation to their movements." Frontiers in Endocrinology. 4. 129-135 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Nakazawa,E.: "Occurrence of fasciculated microtubules at nodes of Ranvier in rat spinal roots." J.Neurocytol.24(in press). (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] 石川春律: "細胞骨格と細胞接着." 日皮会誌. 104. 1503-1507 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 石川春律: "毛細血管" 現代病理学大系. 4. 43-50 (1994)

    • Related Report
      1994 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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