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A study on cooperative roles of sphingolipids and cholesterol in mammalian cell membranes.

Research Project

Project/Area Number 07672410
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Biological pharmacy
Research InstitutionNational Institute of Health

Principal Investigator

HANADA Kentaro  National Institute of Health, Department of Biochemistry and Cell Biology, Principal Investigator., 細胞化学部, 主任研究官 (30192701)

Co-Investigator(Kenkyū-buntansha) NISHIJIMA Masahiro  National Institute of Health, Department of Biochemistry and Cell Biology, Direc, 細胞化学部, 部長 (60072956)
Project Period (FY) 1995 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥2,400,000 (Direct Cost: ¥2,400,000)
Fiscal Year 1996: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1995: ¥1,100,000 (Direct Cost: ¥1,100,000)
Keywordssphingolipids / cholesterol / GPI-anchored proteins / CHO cells / phagocytosis / proteoglycans / latex beads / caveolae / 貪食 / ヘパリン / GPI-アンカー蛋白質 / カベオレ / リポ多糖
Research Abstract

Glycosyl phosphatidylinositol (GPI)-anchored proteins in mammalian membranes are insoluble in Triton X-100 (TX100). We found that deprivations of sphingolipid and cholesterol in CHO cells enhanced the solubility of placental alkaline phosphatase (PLAP), a GPI-anchored protein, in TX100 in an additive manner. The enhanced solubility was suppressed to the control level by metabolic complementation with exogenous sphingosine and cholesterol. Regardless of sphingolipid and cholesterol deprivations, almost all PLAP had the GPI-anchor moiety and there were no differences in the apparent molecular weight of the protein in supernatant and precipitate fractions of the detergent-treated membranes. These results indicated that both sphingolipids and cholesterol were involved in the PLAP insolubility, and suggested that these lipids coordinately playd a role in formation of TX100-resistant complexes.
We also examined whether deprivations of sphingolipid and cholesterol affected phagocytosis of latex beads in CHO cells but found that a reduction of cellular sphingolipid and cholesterol to 50% of the normal levels did not appreciably affect the phagocytic activity. However, we revealed that heparan sulfate proteoglycans at the cell surface were involved in te binding step for phagocytosis of latex beads by CHO cells. This conclusion was based on the following observations : (i) exogenous heparin and heparan sulfate effectively inhibited the binding of latex beads to cells, (ii) the binding of latex beads to cells was also inhibited by treatment of cells with haparitinase, (iii) CHO mutant cells defective in proteoglycans almost completely lacked binding activity of latex beads.

Report

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

    (22 results)

All Other

All Publications (22 results)

  • [Publications] Kentaro Hanada: "Both sphingolipids and cholesterol participate in the detergent insolubility of alkaline phosphatase,a glycosylphosphatidy linositol-anchored protein,in mammalian membranes." Journal of Biological Chemistry. 270. 6254-6260 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 花田賢太郎: "脂質と細胞膜構造の調節:カベオ-ラとの関わり." 細胞工学. 14. 1305-1310 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 花田賢太郎: "スフィンゴ脂質と情報伝達." 膜. 21. 191-196 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 山元久典: "マクロファージのリポ多糖の取り込みと活性化." 生体の科学. 47. 253-256 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 花田賢太郎: "細胞膜カベオラと膜脂質マイクロドメイン." 実験医学. 14. 2065-2069 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Masayoshi Fukasawa: "Involvement of heparan sulfate proteoglycans in the binding step for phagocytosis of latex beads by Chinese hamster ovary cells." Experimental Cell Research. 230. 154-162 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 花田賢太郎: "突然変異体からスフィンゴ脂質の謎に迫る." Glyco News. (印刷中).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Kentaro Hanada: "Both sphingolipids and cholesterol participate in the detergent insolubility of alkaline phosphatase, a glycosylphosphatidylinositol-anchored protein, in mammalian membranes." Journal of Biological Chemistry. 270. 6254-6260 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Kentaro Hanada: "Lipids and regulation of plasma membrane structure : caveola." Saibou-Kougaku. 14. 1305-1310 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Kentaro Hanada: "Sphingolipids and signal transduction" Maku. 21. 191-196 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Hisanori Yamamoto: "Internalization of lipopolysaccharide by macrophages and LPS-induced macrophage activation." Seitai-no-Kagaku. 47. 253-256 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Kentaro Hanada: "Plasmalemmal caveolae and membrane lipid microdomains." Jikken-Igaku. 14. 2065-2069 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Masayoshi Fukasawa: "Involvement of heparan sulfate proteoglycans in the binding step for phagocytosis of latex beads by Chinese hamster ovary cells." Experimental Cell Research. 230. 154-162 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Kentaro-Hanada: "Approach to enigmas of sphingolipids with mutants." Glyco News. (in press.).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Masayoshi Fukasawa: "Involvement of heparan sulfate proteoglycans in the binding step for phagocytosis of latex beads by Chinese hamster ovary cells." Experimental Cell Research. 230. 154-162 (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] 花田賢太郎: "スフィンゴ脂質と情報伝達" 膜. 21・3. 191-196 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 山元久典: "マクロファージのリポ多糖の取り込みと活性化" 生体の科学. 47・4. 253-256 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 花田賢太郎: "細胞膜カベオラと膜脂質マイクロドメイン" 実験医学. 14・14. 2065-2069 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 花田賢太郎: "突然変異体からスフィンゴ脂質の謎に迫る" Glyco News. (印刷中). (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] Kentaro Hanada: "Both sphingo lipids and Cholesterol participate in the detergent insolubility of alkoline phosphatose, a glycosylphosphatidylinositl-anchored protein, in mammalian membranes." Journal of Biological Chemistry. 270. 6254-6260 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 花田賢太郎: "脂質と細胞膜構造の調節:カベオ-ラとの関わり" 細胞工学. 14. 1305-1310 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 西島正弘: "膜脂質のアセンブリー:その機構・機能研究の新しい展開" 細胞工学. 14. 1250-1253 (1995)

    • Related Report
      1995 Annual Research Report

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Published: 1995-04-01   Modified: 2016-04-21  

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