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Identification of the unknown periodontal ligament-related molecules

Research Project

Project/Area Number 18592269
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Periodontal dentistry
Research InstitutionShowa University

Principal Investigator

KOBAYASHI Makoto  Showa University, Showa University School of Dentistry, Periodontology, Lecturer (80186767)

Co-Investigator(Kenkyū-buntansha) OKAMATSU Yoshimasa  Showa University School of Dentistry, Periodontology, Assistant (50286845)
TAKADA Takatora  Showa University School of Dentistry, Periodontology, Assistant (20384323)
Project Period (FY) 2006 – 2007
Project Status Completed (Fiscal Year 2007)
Budget Amount *help
¥3,890,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥390,000)
Fiscal Year 2007: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2006: ¥2,200,000 (Direct Cost: ¥2,200,000)
Keywordsperiodontal ligament cells / tendon / ligament markers / periodontal ligament markers / side population cells / mesenchymal stem cells / potential of multi-lineage differentiation / 軟骨分化誘導 / TGF-β3 / 腱・靭帯マーカー分子 / 幹細胞 / 中胚葉系前駆細胞
Research Abstract

To identify the unknown periodontal ligament-related molecules, we performed the following studies.
1. The changes of the tendon/ligament markers expression by induction of chondrogenic differentiation and TGF-β3 treatment in human periodontal ligament cells (HPLC)
Many tendon/ligament marker molecules may play a role in healing and maintenance of constancy of periodontal ligament as well as tendon/ligament. Further, transforming growth factor-β(TGF-β) stimulates tendon healing. In the present study, we assessed the changes of the tendon/ligament markers expression by induction of chondrogenic differentiation and TGF-β3 treatment in HPLC. When HPLC were aggregated into micropellets and incubated with chondrogenic differentiatin medium with TGF-β3, chondrocyte-like lacunae formation was not detected in HPLC pellets. However, the expression levels of periostin, periodontal ligament associated protein-1 (PLAP-1), biglycan and decorin genes were higher, but growth and differentiation factor- … More 5 (GDF-5) and cartilage oligomeric protein (COMP) gene expression were lower levels, as compared with these pellets cultured with control medium. Further, scleraxis gene expression did not change throughout the culture periods. In monolayer cultures of HPLC, TGF-β3 stimulated expression of periostin, PLAP-1, biglycan, scleraxis and COMP, but suppressed GDF-5 expression, while, this cytokine had no effect on decorin expression. These results demonstrate that the expression of these tendon/ligament marker molecules in HPLC is modulated under the conditions. which induce chondrogenesis. as well as by the TGF-β3 stimulation.
2. Characteristics of side population cells existing in HPLC.
The various types of stem cells exist in side population (SP) effused strongly Hoechst 33342 dye. The SP cells in bone marrow express various mesenchymal stem cell (MSC) markers and are highly enriched for MSC activity. In the present study, we determined the characteristics of SP cells isolated from HPLC. SP cells and non-SP (main population : MP) cells were isolated from HPLC stained with Hoechst 33342 using flowcytometry. The frequency of SP cells existed in HPLC was mean 0.07% of total cells. Then, the gene expression profile, PDL-marker gene expression, activity of cell proliferation and multi-lineage differentiation were determined in SP cells and MP cells. Expression of CD73, a MSC marker gene, in SP cells was higher levels than that in MP cells, while MP cells expressed higher levels of extracellular molecule genes characterized in HPL (type I/III collagen, PLAP-1, periostin, decorin). Further, SP cells had higher cell proliferation activity than MP cells. However, activities of differentiation into osteoblasts and adipocytes were not different between the 2 cell types. Therefore, MSC-like cells may not be enriched in the SP fraction of HPLC. Less

Report

(3 results)
  • 2007 Annual Research Report   Final Research Report Summary
  • 2006 Annual Research Report
  • Research Products

    (8 results)

All 2008 2007

All Journal Article (2 results) (of which Peer Reviewed: 1 results) Presentation (6 results)

  • [Journal Article] 培養ヒト歯根膜細胞における各種腱・靭帯マーカー遺伝子の発現制御.2008

    • Author(s)
      三井将, 小林誠, ら
    • Journal Title

      Dental Med Res 28

      Pages: 137-149

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] The changes of the tendon/ligament markers expression by induction of chondrogenic differentiation and TGF-β3 treatment in human periodontal ligament cells2008

    • Author(s)
      Mitsui M, Kobayashi M, et al.
    • Journal Title

      Dental Med Res 28(3)

      Pages: 137-149

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 培養ヒト歯根膜細胞中に存在するSide Population細胞の特徴.2008

    • Author(s)
      小出容子, 小林誠, ら
    • Organizer
      第7回日本再生医療学会総会
    • Place of Presentation
      名古屋
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Characteristics of side population cells existing in periodontal ligament cells.2008

    • Author(s)
      Koide Y, Kobayashi M, et al.
    • Organizer
      86th General Session & Exhibition of the IADR and 32nd Annual Meeting of the CADR
    • Place of Presentation
      Toronto, Canada
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Characteristics of side population cells existing in human periodontal ligament cells2008

    • Author(s)
      Koide Y, Kobayashi M, et al.
    • Organizer
      The 7^<TH> annual meeting of Japanese Society for regenerative medicine
    • Place of Presentation
      Nagoya, Japan
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Characteristics of side population cells existing in human periodontal ligament cells2008

    • Author(s)
      Koide Y, Kobayashi M, et al.
    • Organizer
      86th General Session & Exhibition of the IADR and 32nd Annual Meeting of the CADR
    • Place of Presentation
      Toronto, Canada
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 培養ヒト歯根膜細胞における各種腱・靱帯マーカー遺伝子の発現制御.2007

    • Author(s)
      三井将, 小林誠, ら
    • Organizer
      第49回日本歯科基礎医学会
    • Place of Presentation
      札幌
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Regulation of expression of tendon/ligament marker molecules in human periodontal ligament cells2007

    • Author(s)
      Mitsui M, Kobayashi M, et al.
    • Organizer
      The 49^<TH> annual meeting of Japanese Association for Oral Biology
    • Place of Presentation
      Sapporo, Japan
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary

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Published: 2006-04-01   Modified: 2016-04-21  

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