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Molecular Mechanism for Calcium Signaling in Cardiomyocyte

Research Project

Project/Area Number 09307013
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Circulatory organs internal medicine
Research InstitutionOsaka University

Principal Investigator

TADA Michihiko  Osaka University Medical School, Professor, 医学部, 教授 (90093434)

Co-Investigator(Kenkyū-buntansha) OTSU Kinya  Osaka University Medical School, Assistant Professor, 医学部, 助手 (20294051)
NISHIDA Masashi  Osaka University Medical School, Assistant Professor, 医学部, 助手 (40283783)
KUZUYA Tsunehiko  Osaka University Medical School, Associate Professor, 医学部, 助教授 (80150340)
星田 四朗  大阪大学, 医学部, 助手 (80238732)
Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥37,400,000 (Direct Cost: ¥37,400,000)
Fiscal Year 1998: ¥14,600,000 (Direct Cost: ¥14,600,000)
Fiscal Year 1997: ¥22,800,000 (Direct Cost: ¥22,800,000)
KeywordsCa signaling / sarcoplasmic reticulum / Ca release channel / phospholamban / heart failure / gene expression / Caジクナリング / カルシウムシグナリング / 興奮収縮連関 / 筋小胞体カルシウム遊離チャネル / 心筋症 / 遺伝子診断
Research Abstract

Muscle contractility is regulated by Intracellualr calcium. Upon depolarization of plasma membrane, Ca is released into cytoplasm from the sarcoplasmic reticulum through Ca release channel, leading to muscle contraction. On the other hand, Ca uptake by Ca ATPase in sarcoplasmic reticulum lowers Ca concentration to induce muscle relaxation. Ca, which binds to calsequestrin, is stored in the sarcoplasmic reticulum. The activity of Ca ATPase is regulated by phospholamban. The sarcoplasmic reticulum plays an important role in exitation-contraction coupling. The changes in expression levels of the Ca signaling proteins in cardiac hypertrophy and heart failure may influence on a cardiac performance. In this study, we analyzed the mechanism for gene expression of Ca release channel and phospholamban. We identified the promotor regions in the genes and possible transcriptional factors for expression. Our structure- function analysis of Ca ATPase and phopholamban revealed that a functional unit of phopholamban is a monomer and an oligomer serves as a pool of the molecule. We showed that extracellular disuffide bonds of connexin 43 are crucial for formation of gap junction, through which cardiomyocytes communicate each other.

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (24 results)

All Other

All Publications (24 results)

  • [Publications] Kimura Y, et al.: "Phospholamban inhibitory function is activated by depolymerization." J.Biol.Chem.272. 15061-15064 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Yamashita N, et al.: "Time course of tolerance to ischemia-reperfusion injury and induction of heat shock protein 72 by heat stress in the rat heart." J.Mol.Cell.Cardiol.29. 1815-1821 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Toyofuku T, et al.: "Intercellular calcium signaling via gap junction in connexin-43-transfected cells." J.Biol.Chem.273. 1519-1528 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Toyofuku T, et al.: "Direct association of the gap junction protein connexin-43 with ZO-1 in cardiac Myocytes." J.Biol.Chem.273. 12725-12731 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Igarashi J, et al.: "Inducible nitric oxide synthase augments injury elicited by oxidative stress in rat cardiac myocytes." Am.J.Physiol.274. c245-c252 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Yabuki M, et al.: "Involvement of NF-Y in transcriptional regulation of the phospholamban gene." Eur.J.Biochem.258. 744-751 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Kimura Y.Kurzydlowski K,Tada M,MacLennan DH :"Phospholamban inhibitory function is activated by depolymerization." J.Biol.Chem.272. 15061-15064 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Yamashita N,Hoshida S,Nishida M,Igarashi J,Aoki K,Hori M,Kuzuya T,Tada M: "Time course of tolerance to ischemia-reperfusion injury and induction of heat shock protein 72 by heat stress in the rat heart." J.Mol.Cell.Cardiol.29. 1815-1821 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Toyofuku T,Yabuki M,Otsu K,Kuzuya T,Hori M,Tada M: "Intercellular calcium signaling via gap junction in connexin-43-transfected cells." J.Biol.Chem.273. 1519-1528 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Toyofuku T,Yabuki M,Otsu K,Kuzuya T,Hori M,Tada M: "Direct association of the gap junction protein connexin-43 with ZO-1 in cardiac Myocytes." J.Biol.Chem.273. 12725-12731 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Igarashi J,Nishida M,Hoshida S,Yamashita N,Kosaka H,Hori M,Kuzuya T,Tada M: "Inducible nitric oxide synthase augments injury elicited by oxidative stress in rat cardiac myocytes." Am.J.Physiol.274. c245-c252 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Yabuki M,Toyofuku T,Otsu K,Nishida M,Kuzuya T,Hori M,Tada M: "Involvement of NF-Y in transcriptional regulation of the phospholamban gene." Eur.J.Biochem.258. 744-751 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] kimura Y,et al.: "Phospholamban inhibitory function is activated by depolymerization." J.Biol.Chem.272. 15061-15064 (1997)

    • Related Report
      1998 Annual Research Report
  • [Publications] Yamashita N,et al.: "Time course of to lerance to ischemia-reperfusion injury and induction of heat shock protein 72 by heat stress in the rat heart." J.Mol.Cell.Cardiol.29. 1815-1821 (1997)

    • Related Report
      1998 Annual Research Report
  • [Publications] Toyofuku T,et al.: "Intercellular calcium signaling via gap junction in connexin-43-transfected cells." J.Biol.Chem.273. 1519-1528 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Toyofuku T,et al.: "Direct association of the gap junction protein connexin-43 with ZO-1 in cardiac Myocytes." J.Biol.Chem.273. 12725-12731 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Igarashi J,et al.: "Inducible nitric oxide synthase augments injury elicited by oxidative stress in rat cardiac myocytes." Am.J.Physiol.274. c245-c252 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Yabuki M,et al.: "Involvement of NF-Y in transcriptional regulation of the phospholamban gene." Eur.J.Biochem.258. 744-751 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Toyofuku T, Yabuki Y, Tada M, et al.: "Intercellular calcium signaling via gap junction in connexin-43-transfected cells." J.Biol.Chem.273. 1519-1528 (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] Igarashi J,Nishida M,Tada M, et al.: "Inducible nitric oxide synthase augments injury elicited by oxidative stress in rat cardiac myocytes." Am.J.Physiol.274. C245-C252 (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] Hoshida S, Nishida M, Tada M, et al.: "Heme oxygenase-1 expression and its relation to oxidative stress during primary culture of cardiomyocytes." J.Mol.Cell.Cardiol.28. 1845-1855 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Yamashita N, Hoshida S, Tada M, et al.: "Time course of tolerance to ischemia-reperfusion injury and induction of heat shock protein 72 by heat stress in the rat heart." J.Mol.Cell.Cardiol.29. 1815-1821 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Yamashita N, Hoshida S, Tada M, et al.: "Heat shock-induced manganese superoxide dismutase enhances the tolerance ofcardiac myocytes to hypoxia-reoxygenation injury." J.Mol.Cell.Cardiol.29. 1807-1813 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Kimura Y, Tada M, et al.: "Phospholamban inhibitory function is activated by depolymerization." J.Brol.Chem.272. 15061-15064 (1997)

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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