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Assessement of smooth muscle viability in the spastic cerebral arteries during chronic vasospasm

Research Project

Project/Area Number 05671149
Research Category

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

Allocation TypeSingle-year Grants
Research Field Cerebral neurosurgery
Research InstitutionUNIVERSITY OF TOKYO

Principal Investigator

KIM Phyo (1994)  Univ of Tokyo, Dept Neurosurgery, Assistant Professor, 医学部(病), 助手 (90231290)

根本 繁 (1993)  東京大学, 医学部(病), 助手 (20228290)

Co-Investigator(Kenkyū-buntansha) NONOMURAL Yoshiaki  Univ of Tokyo, Dept Pharmacology, Professor., 医学部(医), 教授 (80009993)
SASAKI Tomio  Univ of Tokyo, Dept Neurosurgery, Associate Prof., 医学部(病), 助教授 (10134561)
YOSHIMOTO Yuhei  Univ of Tokyo, Dept Neurosurgery, Assistant Prof., 医学部(病), 助手 (50242061)
金 彪  東京大学, 医学部(病), 助手 (90231290)
Project Period (FY) 1993 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1994: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1993: ¥1,300,000 (Direct Cost: ¥1,300,000)
KeywordsCerebral vasospasm, / Subarachnoid hemorrhage, / Smooth muscle, / Permeability, / DNA-binding dye, / Apoptosis / TUNEL法 / 膜透過性 / 細胞内カルシウム
Research Abstract

Alteration of sarcolemmal permeability was evaluated in the cerebral artery after subarachnoid hemorrhage (SAH). Significance of membrane dysfunction in the pathogenesis of chronic spasm and contribution of apoptosis were investigated in a canine model.
Permeability of the smooth muscle cell (SMC) membrane was assessed by double staining with a hydrophilic (ethidium bromide : EB) and a lipophilic (Hoechst 33342 : H33342) DNA-binding dye. Quantitative observations were made with a UV-fluorescence microscope and a UV-laser confocal microscope. Occurrence of apoptosis was studied using electrophoresis and TUNEL method. In the normal arteries, nuclel of SMC were stained with H33342 but not with EB.In the spastic arteries obtained seven days after SAH,45(]SY.+-。[)19% of SMC in the inner layr of the tunica media were stained with EB.The incidence of EB-positive cells decreased in two to four weeks (13(]SY.+-。[)5.2% and 5.0(]SY.+-.[)2.1% respectively) in parallel with amelioration of spasm. Electron and light microscopic observations revealed increased density of SMC cytoplasm with widening of the extracellular space. Necrosis was not evident. Apoptosis was not detected by the two methods. These results demonstrated that an augmentation in sarcolemmal permeability takes place during the course of chronic vasospasm, and suggest its close correlation to pathogenesis.

Report

(3 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report
  • Research Products

    (4 results)

All Other

All Publications (4 results)

  • [Publications] Kim P, Yoshimoto Y, Nakaguchi H et al.: "Increased Sarcolemmal Permeability in the Cerebral Artery during Chronic Spasm" J Cereb Blood Flow Met. (submltted). (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Phyo Kim, Yuhei Yoshimoto, Hiroshi Nakaguchi, Takashi Mori, Akio Asai, Tomio Sasaki, Takaaki Kirino, and Yoshiaki Nonomura :"Increased Sarcolemmal Permeability in the Cerebral Artery during Chronic Spasm-An Assessment using DNA-binding Dyes and Detection of Apoptosis-" Journal of Cerebral Blood Flow and Metabolism. (1998, submitted).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Kim,P: "Loss of relaxations,metabolic farlure and increasad calcium permealility" J.Auton Nerv System. 49. S157-162 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Kim,P et al: "dncreased calcium permealility of Sarcolemma during Vasospasm" J.Cereb.Blood Flow Met. (in press). (1995)

    • Related Report
      1994 Annual Research Report

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Published: 1993-04-01   Modified: 2016-04-21  

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