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Skin aging and phosphate

Research Project

Project/Area Number 20K17325
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 53050:Dermatology-related
Research InstitutionJichi Medical University

Principal Investigator

Kamiya Koji  自治医科大学, 医学部, 准教授 (90790668)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords皮膚老化 / Klotho欠損マウス / 17型コラーゲン
Outline of Research at the Start

皮膚の上皮である表皮は、表皮幹細胞によって維持されており、幹細胞での17型コラーゲンの発現低下による皮膚老化の病態が明らかになりつつある。老化モデルマウスであるKlotho欠損マウスは、生後早期から各臓器に老化症状をきたし、病態の本質はリン排泄障害によるリン貯留である。われわれはすでにKlotho欠損マウスで皮膚の老化症状を確認している。さらに、Klotho欠損マウスの表皮幹細胞での17型コラーゲンの発現低下を確認している。本研究では、高リン血症による17型コラーゲンの発現低下の過程を明らかにし、高リン血症の改善による17型コラーゲンへの影響と皮膚老化症状の改善の過程を明らかにする。

Outline of Final Research Achievements

The klotho mouse shows multiple phenotypes resembling human aging caused by a defect in klotho gene expression. In the homozygous mutant klotho mice (KL-/-), epidermal and dermal atrophy and hair loss were observed by histopathological analysis. Calciprotein particles were not detected in the skin by von Kossa staining. Immunofluorescence showed the decreased level of type 17 collagen in the epidermal stem cells and type 5 collagen in the papillary dermis. The relative mRNA expression of matrixmetalloproteinase 9, a disintegrin and metalloproteinase 9 (ADAM9), ADAM10, and tissue inhibitor of metalloproteinase 1 was decreased by quantitative PCR. The relative mRNA expression of epidermal growth factor receptor was not decreased, while that of heparin-binding epidermal growth factor-like growth factor and transforming growth factor-α was decreased. Immunofluorescence showed that the expression level of type 17 collagen was maintained in KL-/- mice fed by low phosphate diet.

Academic Significance and Societal Importance of the Research Achievements

ミネラル代謝異常などの内因性ストレスによる皮膚老化の病態は未解明で、これまで皮膚老化に対する有効な治療法はない。本研究では、老化モデルマウスを用いて、体内リン貯留による表皮幹細胞における17型コラーゲンの発現低下を確認した。また、体内リン貯留を抑えることで、表皮幹細胞における17型コラーゲンの発現が維持されることを確認した。ヒトの皮膚老化でも同様の病態が明らかになれば、新たな治療法の開発につながる。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (3 results)

All 2023 2022 2021

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (1 results)

  • [Journal Article] Keratinocyte stem cells: Role in aging.2022

    • Author(s)
      Ansary TM, Kamiya K, Ohtsuki M.
    • Journal Title

      IntechOpen.

      Volume: -

    • DOI

      10.5772/intechopen.102805

    • ISBN
      9781803550992, 9781803551005
    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Inflammatory Molecules Associated with Ultraviolet Radiation-Mediated Skin Aging2021

    • Author(s)
      Ansary Tuba M.、Hossain Md. Razib、Kamiya Koji、Komine Mayumi、Ohtsuki Mamitaro
    • Journal Title

      International Journal of Molecular Sciences

      Volume: 22 Issue: 8 Pages: 3974-3974

    • DOI

      10.3390/ijms22083974

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Induction of Type XVII collagen by Apocynin reduces cellular senescence both in-vitro and in-vivo.2023

    • Author(s)
      Ansary TM, Kamiya K., Kimura M., Hossain MR., Komine M., Ohtsuki M.
    • Organizer
      加齢皮膚医学研究会
    • Related Report
      2023 Annual Research Report

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Published: 2020-04-28   Modified: 2025-01-30  

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