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Altered gene expression of endothelial cell and atherosclerosis.

Research Project

Project/Area Number 10670210
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Experimental pathology
Research InstitutionSaga Medical School

Principal Investigator

TOKUNAGA Osamu  Saga Medical School, Pathology Department, Professor, 医学部, 教授 (40113229)

Co-Investigator(Kenkyū-buntansha) SATOH Toshimi  Saga Medical School, Pathology Department, Associate Professor, 医学部, 助教授 (20162456)
Project Period (FY) 1998 – 2000
Project Status Completed (Fiscal Year 2000)
Budget Amount *help
¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 2000: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1999: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 1998: ¥1,400,000 (Direct Cost: ¥1,400,000)
Keywordshuman / atherosclerosis / endothelium / variant / gene / mutation / FISH / 内皮細胞 / バリアント / LDL / caveolin / バリアント内皮 / 遺伝子異常
Research Abstract

Existence of large endothelial cells in the human aorta, especially on atherosclerotic lesions has been reported. They have multiple nuclei and are called "multinucleated variant endothelial cells (MVECs)". MVECs express p53 tumor suppressor gene and have chromosomal aneuploidy. During the present study period, it was found that MVECs over -expressed LDL receptor and have enhanced uptake of native LDL.
In the latest study, caveolin expression was demonstrated in MVECs, but the density of it is similar to typical small mononuclear endothelial cells (TECs). However, the size of caveoles was greater in MVECs than TECs. This may reflect the overexpression of LDL receptor on the cell surface. In fact, LDL-gold uptake study demonstrated 4.5-fold greater amount of gold particles per cell surface unit area in the MVECs. The LDL-gold particles were located in plasmalemmal vesicles, and in endosomes or lysosomes of MVECs with occasional opening on the abluminal surface, whereas few particles were found in TECs. These findings indicate that MVECs have a greater capacity to transport LDL cholesterol than that of TECs.
LDL oxidation was demonstrated in the cytoplasm of ECs, , especially of MVECs when cultured in the presence of ferritin. The intracellular oxidative modification of LDL (IOM-LDL) was blocked by iron chelator or antioxidants. These observations suggest that ECs have IOM-LDL which was catalyzed by iron released from ferritin. MVECs contribute to the development and advancement of atherosclerotic lesions.

Report

(4 results)
  • 2000 Annual Research Report   Final Research Report Summary
  • 1999 Annual Research Report
  • 1998 Annual Research Report
  • Research Products

    (26 results)

All Other

All Publications (26 results)

  • [Publications] Satoh T: "Intracellular oxidative modification of low density lipoprotein by endothelial cells."Virchow Archiv, in press.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Matsubayasi R: "Breast masses with peripheral rim enhancement on dynamic contrast-enhanced MR-Images : Correlation of MR findings with histologic features and expression of growth factors."Radiology. 217. 841-848 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Sawatsubashi M: "Association of vascular endothelial growth factor and mast cells with angiogenesis in laryngeal squamous cell carcinoma."Virchows Arch. 436. 243-248 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Yoshino S: "Bacterial lipopolysaccharide acts as an adjuvant to induce autoimmune arthritis in mice."Immunology. 99. 607-614 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Mia Y: "Dimethyl dioctadecyl ammonium bromide (DDA)-induced arthritis in rats : a model of experimental arthritis"J.Autoimmunity. 14. 303-310 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Wu L: "Formation of multinucleated variant endothelial cells (MVECs) in vitro and investigation of MVECs features"Fukuoka Acta Med. 90. 377-391 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Satoh T, Tokunaga O: "Intracellular oxidative modification of low density lipoprotein by endothelial cells."Virchow Archiv. (in press.).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Matsubayasi R, Matsuo Y, Edakuni G, Satoh T, Tokunaga O, Kudo S: "Breast masses with peripheral rim enhancement on dynamic contrast-enhanced MR Images : Correlation of MR findings with histologic features and expression of growth factors."Radiology. 217. 841-848 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Sawatsubashi M, Yamada T, Fukushima N, Mizokami H, Tokunaga O, Shin T: "Association of vascular endothelial growth factor and mast cells with angiogenesis in laryngeal squamous cell carcinoma."Virchows Arch. 436. 243-248 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Yoshino S, Sasatomi E, Ohsawa M: "Bacterial lipopolysaccharide acts as an adjuvant to induce autoimmune arthritis in mice."Immunology. 99. 607-614 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Mia Y, Zhang L, Hossin A, Zheng C L, Tokunaga O, Kohashi O: "Dimethyl diocadecyl ammonium bromide (DDA)-induced arthritis in rats : a model of experimental arthritis"J.Autoimmunity. 14. 303-310 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Wu L, Satoh T, Tokunaga O: "Formation of multinucleated variant endothelial cells (MVECs) in vitro and investigation of MVECs' features"Fukuoka Acta Med. 90. 377-391 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Ye X, Fukudome K, Tsuneyoshi N, Satoh T, Tokunaga O et al: "The endothelial cell protein C receptor (EPCR) functions as a primary receptor for protein C activation on endothelial cells in arteries, veins, and capillaries"BiochemicalandBiophysical Research Communications. 259. 671-677 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Ogawa A, Miyazaki K, Tokunaga O: "Distribution of newly formed vessels in human colorectal carcinomas with microangiography"Colorectal Dis. 1. 88-100 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Matsubayashi R: "Breast masses with peripheral rim enhacement on dynamic contrast-enhanced MR Images : Correlation of MR findings with histologic features and expression of growth factors."Radiology.. 217. 841-848 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Sawatsubashi M: "Association of vascular endothelial growth factor and mast cells with angiogenesis in laryngeal squamous cell carcinoma."Virchows Arch. 436. 243-248 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Yoshino S: "Bacterial lipopolysaccharide acts as an adjuvant to induce autoimmune arthritis in mice."Immunology. 99. 607-614 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Mia Y: "Dimethyl dioctadecyl ammonium bromide (DDA)-induced arthritis in rats : a model of experimental arthritis"J.Autoimmunity. 14. 303-310 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Wu L: "Formation of multinucleated variant endothelial cells (MVECs) in vrtro and investigation of MVECs' features"Fukuoka Acta Med. 90. 377-391 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Ye X: "The endothelial cell protein C receptor (EPCR) functions as a primary receptor for protein C activation on endothelial cells in arteries,veins,and capillaries"Biochemical and Biophysical Research Communications. 259. 671-677 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Ogawa A: "Distribution of newly formed vessels in human colorectal carcinomas with microangiography"Colorectal Dis. 1. 88-100 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Yamada T: "Immunohistochemical and ultrastructural examination of smooth muscle cells in aortocoronary saphenous vein grafts" Angiology. 48. 381-390 (1997)

    • Related Report
      1998 Annual Research Report
  • [Publications] Tokunaga O: "Multinucleated variant endothelial cells(MVEC_s)in human aorta:Chromosomal aneuploidy and elevated uatake of LDL" Seminars in Thrombosis and Hemostasis. 24. 279-284 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Fukudome K: "Activation mechanism of anticoagulant protein C in large blood vessels involving the endothelial cell protein C receptor" J Exp Med. 7. 1029-1035 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Satoh T: "Multinucleated variant endothelial cells of human aorta:expression of tumor suppressor gene p53 and relationship to atherosclerosis and aging" Endothelium、. (in press). (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Ogawa A: "Distribution of newly formed vessels in human colorectal carcinomas with microangiography" Colorectal Dis、. (in press). (1999)

    • Related Report
      1998 Annual Research Report

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Published: 1998-04-01   Modified: 2016-04-21  

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