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Basic fibloblast growth factor as cardiac growth factor.

Research Project

Project/Area Number 04670566
Research Category

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

Allocation TypeSingle-year Grants
Research Field Circulatory organs internal medicine
Research InstitutionKURUME UNIVERSITY

Principal Investigator

NAKATA Masashi (1994)  Kurume University, The 3rd dept of school of medicine Head investigator, 医学部, 講師 (70180304)

千葉 未知夫 (1992-1993)  久留米大学, 医学部, 講師 (10150822)

Co-Investigator(Kenkyū-buntansha) 住田 恵美子  久留米大学, 医学部, 助手 (70226603)
中田 真詩  久留米大学, 医学部, 助手 (70180304)
Project Period (FY) 1992 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1994: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1993: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1992: ¥1,400,000 (Direct Cost: ¥1,400,000)
KeywordsBasic fibroblast growth factor / Transforming growth factor-beta 1. / Myocardial hypertrophy / Extra cellular matrix / alpha-actin mRNA. / c-myc oncogene. / Wester blotting. / Myocardial cell culture / FGF / TGFβ / C-myc / alpha-ワクチン / Western blotting / Northern blotting / α-アクチン
Research Abstract

Basic fibroblast growth factor (bFGF) is a mitogen that to playa important role in myocyte growth. In the first study, we found the increase of immunoreactivity of bFGF in cardiac myocyte of young SHR and pressure over-loaded rat heart, and it suggested that endogenous bFGF which contained high molecular form of bFGF contributes to myocardial hypertrophy. In the second study, rabdomyosarcoma (A204 cells) derived bFGF was used as wild type bFGF.A204 cells included high molecular form (22,24kD), as well as low molecular (18kD) bFGF by western blotting, and showed hypertrophied effect in cultured myocyte. The hypertrophic effects were indicated in remarkable enlargement of cell size and significant increase in accumulation of phenylalanin incorporation. The maximum expression of c-myc mRNA by A204 cell conditioned medium was observed 30 min after stimulation, and it was also accompanied by an increase of accumulation of alpha skeletal actin mRNA by primer extension. After absorption of he … More parin binding growth factor from A204 cnditioned medium, it indicated no hypertrophic effects. These finding suggests that endogenous high molecular form of bFGF produced by cardiomyocytes contributes to myocardial hypertrophy. In the third study, we investigated the expression and function of transforming beta1 (TGF-beta1) during evolving myocardial hypertrophy in cultured myocytes treated with norepinephrine (NE), angiotensin -II (A-II), Phorbor ester (PMA) and endogenous bFGF.NE,A-II,PMA and endogenous bFGF produced hypertrophy of cultured myocytes and induced expression of TGF-beta1 in the mRNA and protein level, determined by northern and western blotting analysis as well as immunohistorical staining. These agents also increased vascular extracellular components of fibronectin and laminin and the receptor, beta1-integrin. Recombinant TGF-beta1 had no effects of cardiac hypertrophy, whereas TGF-beta1 increased production of fibronectin, laminin and beta1-integrin in cultured cardiomyocytes. These observation indicates that endogenous TGF-beta1 is induced in cultured cardiomyocytes during the development of hypertrophy. TGF-beta1 acts on myocytes in autocrine manner and lead to production of extrcellular matrix and adhesion molecule. These findings suggest that TGF-beta1 produced by cardiomyocytes could contribute to the development of fibrosis and remodeling associated with cardiac hypertrophy. Less

Report

(4 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report
  • 1992 Annual Research Report
  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] 千葉未知夫、中田真詩: "側副血行路形成におけるBasic Fibroblast Factorの役割" 脈管学. 32. 1219-1223 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 住田恵美子、中田真詩: "Fibroblast Growth Factorの心筋細胞肥大作用について" 心筋の構造と代謝 -1991-. 371-376 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 千葉未知夫: "心血管系におけるbasic FGFの役割" nano GIGA. 2. 1521-1526 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 住田恵美子: "Basic Fibroblast Growth Factorの心筋肥大作用について" 呼吸と循環. 41. 779-785 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 田中政史、中田真詩: "心筋肥大発生過程におけるTGFβ1の発現と役割" 心筋の構造と代謝 -1993. 16. 391-398 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 田中政史、中田真詩: "心筋肥大発生過程におけるTGFβ1の発現と役割" 心筋の構造と代謝-1993. 16. 391-398 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 千葉,未知夫: "心血管系におけるbasic FGFの役割" nano GIGA. 2. 1521-1526 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 住田,恵美子: "Basic Fibroblast Growth Factorの心筋肥大作用について" 呼吸と循環. 41. 779-785 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 千葉 未知夫: "側副血行路形成におけるBasic Fibroblast Growth Factorの役割" 脈管学. 32. 1219-1223 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 住田 惠美子: "Fibroblast Growth Factorの心筋細胞肥大作用について" 心筋の構造と代謝 ー1991ー. 371-376 (1991)

    • Related Report
      1992 Annual Research Report

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Published: 1992-04-01   Modified: 2016-04-21  

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