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IgA腎症発症機転におけるIgAlヒンジ糖ペプチドの関与について

Research Project

Project/Area Number 09770848
Research Category

Grant-in-Aid for Encouragement of Young Scientists (A)

Allocation TypeSingle-year Grants
Research Field Kidney internal medicine
Research InstitutionKitasato University

Principal Investigator

小久保 透  北里大学, 医学部, 助手 (60215225)

Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1998: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1997: ¥900,000 (Direct Cost: ¥900,000)
KeywordsIgA腎症 / IgAl / hinge / 糖鎖 / IgA1
Research Abstract

【目的】IgA腎症で有意に高い事が観察されているIgAlの自己凝集能およびmatrix蛋白への粘着能においてIgAl糖鎖の果たす役割をin vitroで検討すること。 【方法】(1)酵素的にNeuNAc、Gal、GalNAcを除去されたIgAlを作成し(asialo、agalacto、naked IgAl)、その分子量を電気泳動によりnative IgAlと比較した。(2)asialo、agalcto、naked IgAlの細胞外matrix蛋白に対する結合性をELISAによりnative IgAlと比較した。【結果】(1)asialo、agalacto、nakedIgAlはnative IgAlにはみられない分子量600kD以上におよぶ凝集物として存在した。(2)asialo、agalacto.naked IgAlはいづれもnative IgAlに比較して有意に強くtype IVcollagen、fibronectin、lamininに結合した。特にagalacto IgAlの結合能が最も強かった。【結論】糖鎖の除去はIgAlの自己凝集を惹起し、matrixへの粘着能を増加させた。IgA腎症におけるIgAl糖鎖異常の糸球体IgA蓄積機序への関与が示唆された。

Report

(2 results)
  • 1998 Annual Research Report
  • 1997 Annual Research Report
  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] Tohru Kokubo et al: "Protective Role of IgAl Glycans against IgAl Self-Aggregation and Adhesion to Extra cellular Matrix Proteins." Journal of American Society of Nephrology. 9. 2048-2054 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Tohru Kokubo et al: "Evidence for Imvolvement of IgA1 hinge glycopepfide in the IgA1-IgA1 interaction in IgA nephropathy" Journal of American Society of Nephrology. 8. 915-919 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Y.Hiki,T.Kokubo et.al.: "Analyses of IgA1 hinge glycopepfides in IgA, nephropathy by matrix-assisted laser desorption/ionization time of flight mass spectrometry" Journal of American Society of Nephrology. (in press).

    • Related Report
      1997 Annual Research Report
  • [Publications] Y.Kobayashi,T.Kokubo et al.: "Prognostic prediction of long term clinical courses in individual IgA nephropathy patients." Nephrology. 3. 35-40 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Y.Kobayashi,Y.Hiki,T.Kokubo: "Steroid therapy in progressive IgA nephropathy.A 10 year follow-up study." Nephrology. 3. S739-S745 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] H.Iwase,A.Tanaka,T.Kokubo: "Application of matrix-assisted laser desovption ionization time-of-flight mass spectrometry to the analysis of glycepeptide contaning multiple O-linked obigsatcharides" Journal of Chromatography B. (in press).

    • Related Report
      1997 Annual Research Report

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

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