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Characterization of highly proliferative epidermal stem cells during pregnancy and parturition

Research Project

Project/Area Number 19K17796
Research Category

Grant-in-Aid for Early-Career Scientists

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

Principal Investigator

Ichijo Ryo  京都大学, ウイルス・再生医科学研究所, 助教 (50804382)

Project Period (FY) 2019-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2019: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords皮膚 / 幹細胞 / 表皮幹細胞 / 妊娠 / 張力
Outline of Research at the Start

本研究では妊娠・出産に着目し、高い増殖能を有する表皮幹細胞のCharacterizationを解明することを研究目的とする。毛包間表皮幹細胞は単一集団と考えられている。本研究によるSingle cell RNA sequenceによって各細胞集団を特性化していくことで、毛包間表皮幹細胞の異質性(heterogeneity)の可能性を言及できる。高増殖能を有する幹細胞が周囲の細胞にシグナルを伝える、あるいは周囲の細胞外マトリックスを変化させ、増殖ニッチを形成するなどを同定できれば、学術的な意義は高い。

Outline of Final Research Achievements

Stem cell(SC) proliferation and differentiation organize tissue homeostasis. However, how SCs regulate coordinate tissue scaling in dynamic organs remain unknown. We found that interfollicular epidermal SCs (IFESCs) shape basal epidermal proliferating clusters (EPCs) in expanding abdominal epidermis of pregnant mice and proliferating plantar epidermis. Clonal lineage tracing revealed that Tbx3+-BC clones emerge in the abdominal epidermis during pregnancy, followed by differentiation after parturition. In the plantar epidermis, Tbx3+-BCs are sustained as long-lived SCs to maintain EPCs invariably. We showed that Tbx3+-BCs are vasculature-dependent IFESCs and identified mechanical stretch as an external cue for the vasculature-driven EPC formation. Our results uncover vasculature-mediated IFESC regulations, which explain how the epidermis adjusts its size in orchestration with dermal constituents in dynamic skin.

Academic Significance and Societal Importance of the Research Achievements

皮膚は、体の生理変化や体形変化に応じて拡張・収縮するダイナミックな臓器である。このような生理的な皮膚リモデリングは、皮膚組織を構成する多様な細胞の不均一性、階層性、相互作用の時空間的な変化により誘導されると予想されるが、それを担う多細胞ネットワークや制御機構は不明である。本研究により、血管が真皮と表皮のリモデリングを誘導し、体表領域や生理変化に合わせた皮膚の形態や伸展を制御していることが明らかとなった。これらの成果は皮膚の再生医療に貢献できると考えられる。

Report

(3 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • Research Products

    (3 results)

All 2021 2019

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (2 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Vasculature-driven stem cell population coordinates tissue scaling in dynamic organs2021

    • Author(s)
      Ichijo R.、Kabata M.、Kidoya H.、Muramatsu F.、Ishibashi R.、Abe K.、Tsutsui K.、Kubo H.、Iizuka Y.、Kitano S.、Miyachi H.、Kubota Y.、Fujiwara H.、Sada A.、Yamamoto T.、Toyoshima F.
    • Journal Title

      Science Advances

      Volume: 7 Issue: 7

    • DOI

      10.1126/sciadv.abd2575

    • NAID

      120007181742

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 皮膚表皮幹細胞の性質は体表領域により異なる2019

    • Author(s)
      一條遼、佐田亜衣子、山本拓也、豊島文子
    • Organizer
      第42回日本分子生物学会年会
    • Related Report
      2019 Research-status Report
  • [Presentation] Defining the highly proliferative IFE stem cell state in regional skin homeostasis and remodeling2019

    • Author(s)
      yo Ichijo, Aiko Sada, Takuya Yamamoto & Fumiko Toyoshima.
    • Organizer
      Epithelial Differentiation and Keratinization Gordon Research Conference
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2022-01-27  

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