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Analysis of hair disorders caused by mutations in lipid-related genes

Research Project

Project/Area Number 21K08347
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 53050:Dermatology-related
Research InstitutionYamaguchi University

Principal Investigator

Shimomura Yutaka  山口大学, 大学院医学系研究科, 教授 (70397107)

Project Period (FY) 2021-04-01 – 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 2023: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords脂質関連遺伝子 / LSS / 乏毛症 / PLCD1 / 遺伝性毛髪疾患 / 先天性毛髪疾患 / lanosterol synthase / lanosterol / 脂質 / コレステロール
Outline of Research at the Start

まず、近年報告された先天性乏毛症の原因遺伝子であるlanosterol synthase (LSS)遺伝子に着目し、変異が発現・機能に及ぼす影響をin vitroおよびin vivoレベルで解明し、遺伝子型と臨床症状との相関関係について検討を行う。さらに、先天性毛髪疾患の発症に関与する新規の脂質関連遺伝子を同定し、発現・機能解析を行うことで、ヒトにおける脂質代謝系の毛包の発生・分化における役割や意義をさらに明らかにする。

Outline of Final Research Achievements

In this study, we performed detailed expression and functional studies in cultured cells in order to disclose genotype-phenotype correlations for LSS gene mutations, which have been reported to underlie several distinct diseases. We overexpressed wild-type and a total of 6 LSS gene mutants (G12D, R177Q, V487E, P549L, W581R, T705K) in cultured cells and analyzed their expression patterns and the ability to generate lanosterol. However, we did not find obvious differences in either expression or function between the LSS gene mutations analyzed. Nevertheless, we were able to further characterize the hair shaft anomalies resulting from LSS gene mutations. In addition, we reconfirmed that mutations in SREBF1 and PLCD1 genes underlie a congenital hair disorder and a familial hair follicle-derived tumor, respectively. Our data further highlight that lipid-related genes are involved in causing various hair disorders in humans.

Academic Significance and Societal Importance of the Research Achievements

本研究では、LSS遺伝子変異に関するgenotype-phenotype correlationを明確にする知見を得ることはできなかったが、同遺伝子変異による毛髪異常の特徴はかなり明らかになり、診断を決定する際の一助になると思われる。また、SREBF1, PLCD1はともに脂質関連遺伝子であり、それらの異常が先天性毛髪疾患や毛包系腫瘍の発症に関与していることが改めて示された。特に、PLCD1遺伝子におけるmonoallelic two hitsという現象は腫瘍の発生過程としては極めてまれな現象である。本研究は、脂質関連遺伝子の毛包における役割や重要性を解き明かす足がかりになったと思われる。

Report

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

    (17 results)

All 2025 2023 2022 2021

All Journal Article (7 results) (of which Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (10 results) (of which Int'l Joint Research: 1 results,  Invited: 7 results)

  • [Journal Article] Molecular Basis of Hereditary Hair Diseases2025

    • Author(s)
      Shimomura Yutaka
    • Journal Title

      The Keio Journal of Medicine

      Volume: 74 Issue: 1 Pages: 27-36

    • DOI

      10.2302/kjm.2023-0007-IR

    • ISSN
      0022-9717, 1880-1293
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 正常な毛包の特徴を踏まえて脱毛症を理解しよう2023

    • Author(s)
      下村 裕
    • Journal Title

      Visual Dermatology

      Volume: 22 Pages: 1098-1102

    • Related Report
      2023 Annual Research Report
  • [Journal Article] 縮毛症との鑑別を要したMarie-Unna型遺伝性乏毛症の1例2023

    • Author(s)
      駄阿也眞人、青山裕美、下村 裕
    • Journal Title

      Visual Dermatology

      Volume: 22 Pages: 1161-1163

    • Related Report
      2023 Annual Research Report
  • [Journal Article] 皮膚症状からみる遺伝子解析2022

    • Author(s)
      下村 裕
    • Journal Title

      皮膚科

      Volume: 2 Pages: 513-519

    • Related Report
      2022 Research-status Report
  • [Journal Article] Welcome to the hair world!2022

    • Author(s)
      Shimomura Yutaka
    • Journal Title

      The Journal of Dermatology

      Volume: 49 Issue: 1 Pages: 3-3

    • DOI

      10.1111/1346-8138.16234

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Update of recent findings in genetic hair disorders2021

    • Author(s)
      Hayashi Ryota、Shimomura Yutaka
    • Journal Title

      The Journal of Dermatology

      Volume: 49 Issue: 1 Pages: 55-67

    • DOI

      10.1111/1346-8138.16204

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] 遺伝性毛髪疾患の形態学および遺伝学2021

    • Author(s)
      下村 裕
    • Journal Title

      皮膚病診療

      Volume: 43 Pages: 882-888

    • Related Report
      2021 Research-status Report
  • [Presentation] LIPH遺伝子変異の発現機能解析2023

    • Author(s)
      専徳健太、久本岳史、浅野伸幸、井上飛鳥、下村 裕
    • Organizer
      第31回毛髪科学研究会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Let's master one way: A message from an ordinary dermatologist who has continued working on rare genetic hair diseases2023

    • Author(s)
      Yutaka Shimomura
    • Organizer
      第31回毛髪科学研究会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 常染色体劣性縮毛症の新規原因遺伝子の解析2022

    • Author(s)
      下村 裕
    • Organizer
      第78回日本皮膚科学会高知地方会
    • Related Report
      2022 Research-status Report
  • [Presentation] 毛の形態学と疾患2022

    • Author(s)
      下村 裕
    • Organizer
      第54回臨床分子形態学会総会・学術集会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] Analysis of causative genes for autosomal recessive woolly hair2022

    • Author(s)
      Yutaka Shimomura
    • Organizer
      World congress for hair research 2022
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] LIPH遺伝子変異による縮毛症・乏毛症以外の遺伝性毛髪疾患をどう診るか?2022

    • Author(s)
      下村 裕
    • Organizer
      第86回日本皮膚科学会東京支部学術大会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 遺伝性毛髪疾患の患者に遭遇した際にどうするか?2021

    • Author(s)
      下村 裕
    • Organizer
      第37回日本臨床皮膚科医会九州ブロック総会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 小児の脱毛症:遺伝性疾患を疑うとき2021

    • Author(s)
      下村 裕
    • Organizer
      第45回日本小児皮膚科学会学術大会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 脱毛症研究Update2021

    • Author(s)
      下村 裕
    • Organizer
      第85回日本皮膚科学会東京支部学術大会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 遺伝性毛髪疾患のアップデート2021

    • Author(s)
      下村 裕
    • Organizer
      第72回日本皮膚科学会中部支部学術大会
    • Related Report
      2021 Research-status Report
    • Invited

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Published: 2021-04-28   Modified: 2025-01-30  

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