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Expression of a CTLA-4 mRNA variant and its clinical significance in systemic lupus erythematosus

Research Project

Project/Area Number 11670432
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 内科学一般
Research InstitutionHOKKAIDO UNIVERSITY

Principal Investigator

KOBAYASHI Seiichi  Hokkaido Univ., Coll.of Med.Tech., Prof., 医療技術短期大学部, 教授 (30150246)

Co-Investigator(Kenkyū-buntansha) MORIYAMA Takanori  Hokkaido Univ. Coll.of Med.Tech., Asso.Prof., 医療技術短期大学部, 助教授 (20312423)
Project Period (FY) 1999 – 2000
Project Status Completed (Fiscal Year 2000)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,900,000)
Fiscal Year 2000: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1999: ¥2,400,000 (Direct Cost: ¥2,400,000)
Keywordssystemic lupus erythematosus / RT-PCR / alternative splicing / soluble CTLA-4 / gene transfer / monoclonal antibody / sandwich ELISA / carrier protein / 疾患活動性 / 二量体 / 可溶型CTLA-4 / 組換え蛋白
Research Abstract

1.In the RT-PCR analysis of full-length CTLA-4 gene expression by PBMC from SLE patients, we cloned a CTLA-4 mRNA variant, which was generated by alternative splicing of the transmembrane-encoding exon 3. The 22 altered amino acid sequence in the C terminus was deduced in this CTLA-4 mRNA variant as well as the deletion of the transmembrane domain.
2.Culture supernatants from COS-7 cells transfected with the CTLA-4 variant cDNA-inserted expression vector were found to contain the soluble form of CTLA-4 (sCTLA-4), which indicated that the sCTLA-4 mRNA variant did encode a sCTLA-4 protein.
3.A monoclonal antibody, H11.6 (IgGa, κ), which reacts with sCTLA-4, was established by a standard cell fusion technique from the mice immunized with the synthetic peptide (the 22 amino acids above)-KLH conjugate in CFA and IFA.A newly-designed sandwich ELISA for sCTLA-4 was developed using commercially available anti-CTLA-4 mAb as a capture antibody and biotin-labeled H11.6 mAb as a detection antibody.
4.Serum sCTLA-4 levels in SLE patients were significantly lower than healthy controls (P<0.03). They, however, did not correlate with any laboratory data and a daily dosage of prednisolone.
5.sCTLA-4 gene-transfected COS-7 cells produced a 26kD protein in the culture supernatant. When it was mixed with human serum, sCTLA-4 activity was observed in identical fractions with serum albumin in both gel fractionation HPLC and ion exchange chromatography. These data strongly suggested that serum albumin is one of the carrier proteins for sCTLA-4.

Report

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

    (21 results)

All Other

All Publications (21 results)

  • [Publications] Seiichi Kobayashi: "Gene cloning of soluble form of CTLA-4(sCTLA-4) from PBMC of SLE patients and development of a sandwich ELISA for sCTLA-4"Arthritis and Rheumatism. 42・9. S102 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Kenji Ichikawa: "A chimeric antibody with the human γ1 constant region as a putative standard for assays to detect IgG anticardiolipin and anti-β2-glycoprotein I antibodies"Arthritis and Rheumatism. 42・9. S367 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Kenji Ichikawa: "A chimeric antibody with the human γ1 constant region as a putative standard for assays to detect IgG β2-glycoprotein I-dependent anticardiolipin and anti-β2-glycoprotein I antibodies"Arthritis and Rheumatism. 42・11. 2461-2470 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Masaya Mukai: "Liver dysfunction due to apoptosisi in a patient with systemic lupus erythematosus"Lupus. 9・1. 74-77 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Susumu Nakajima: "Hemopexin, as a carrier protein of tumor-localizing Gametalloporphyrin-ATN-2"Cancer Letter. 149・1-2. 221-226 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Hiroshi Azuma: "Analysis of soluble interleukin 6 receptor in cerebrospinal fluid in inflammatory and non-inflammatory conditions"Cytokine. 12・2. 160-164 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Takanori Moriyama: "Immunochemical characteriation of monoclonal protein in the serum of a patient with Waldenstrom's macroglobulinemia showing both pyroglobulin and cyroglobulin properties"Clinica Chimica Acta. 296・1-2. 171-180 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Seiichi Kobayashi: "Gene cloning of soluble form of CTLA-4 (sCTLA-4) from PBMC of SLE patients and development of a sandwich ELISA for sCTLA-4"Arthritis and Rheumatism. 42-9. S102 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Kenji Ichikawa: "A chimeric antibody with the human γ1 constant region as a putative standard for assays to detect IgG anticardiolipin and anti-β2-glycoprotein I antibodies"Arthritis and Rheumatism. 42-9. S367 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Kenji Ichikawa: "A chimeric antibody with the human γ1 constant region as a putative standard for assays to detect IgG β2-glycoprotein I-dependent anticardiolipin and anti-β2-glycoprotein I antibodies"Arthritis and Rheumatism. 42-11. 2461-2470 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Masaya Mukai: "Liver dysfunction due to apoptosis in a patient with systemic lupus erythematosus"Lupus. 9-1. 74-77 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Susumu Nakajima: "Hemopexin, as a carrier protein of tumor-localizing Ga-metalloporphyrin-ATN-2"Cancer Letter. 149-1 2. 221-226 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Hiroshi Azuma: "Analysis of soluble interleukin 6 receptor in cerebrospinal fluid in inflammatory and non-inflammatory conditions"Cytokine. 12-2. 160-164 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Takanori Moriyama: "Immunochemical characterization of monoclonal protein in the serum of a patient with Waldenstrom's macroglobulinemia showing both pyroglobulin and cryoglobulin properties"Clinica Chimica Acta. 296-1 2. 171-180 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] M.Mukai: "Liver dysfunction due to apoptosis in a patient with systemic lupus erythematosus."Lupus. 9・1. 74-77 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] S.Nakajima: "Hemopexin, as a carrier protein of tumor-localizing Gametalloporphyrin-ATN-2."Cancer Letter. 149・1-2. 221-226 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 小林清一: "自己免疫疾患とFas/FasL異常"臨床検査. 44・4. 405-410 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 森山隆則: "母体由来のヒト抗マウス抗体(HAMA)による新生児の見かけ上の高TSH血症に関する研究"北海道大学医療技術短期大学部紀要. 13. 1-7 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] S.Kobayashi: "Gene cloning of soluble form of CTLA-4(sCTLA-4) from PBMC of SLE patients and development of a sandwich ELISA for sCTLA-4"Arthritis & Rheumatism. 42・9. 102 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] K.Ichikawa: "A chimeric antibody with the human γ 1 constant region as a putative standard for assays to detect IgG β2-glycoprotein I-dependent anticardiolipin and anti-β2-glycoprotein I antibodies"Arthritis & Rheumatism. 42・11. 2461-2470 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] 多羅尾史明: "可溶型Fas測定における血清検体の非働化効果について"北海道大学医療技術短期大学部紀要. 12. 1-8 (1999)

    • Related Report
      1999 Annual Research Report

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Published: 1999-04-01   Modified: 2016-04-21  

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