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in vivo and in vitro analysis of LRRTM4 mutation associated with dominant-inherited macular degeneration.

Research Project

Project/Area Number 18K09432
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 56060:Ophthalmology-related
Research Institution独立行政法人国立病院機構(東京医療センター臨床研究センター)

Principal Investigator

Okamoto Akiko  独立行政法人国立病院機構(東京医療センター臨床研究センター), 分子細胞生物学研究部, 研究員 (70450400)

Project Period (FY) 2018-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords遺伝性疾患 / 全エクソーム解析 / 全ゲノム解析 / 変異 / 機能解析 / 疾患モデル動物 / 網膜 / 変性 / 全ゲノム配列解析 / 遺伝性網膜疾患 / 動物モデル / 病態解析 / ゲノム編集 / ノックインマウス / シナプス / 分子生物学 / モデル動物
Outline of Final Research Achievements

We examined the pathogenic effect of LRRTM4 p.C538Y variant which was identified as a candidate causal mutation for autosomal dominant macular dystrophy. Mutant mouse with Lrrtm4 p.C538Y missense mutation was tested. While the patients showed severe macular degeneration and loss of ON-bipolar cell responses, the mutant mice did not show significant differences in the retinal thickness and bipolar cell responses from the wild type littermates up to one year. To examine the possible effect of additional genetic variant(s), we performed whole-genome sequencing of the three patients in a family. From more than 25,000 variants, we selected patient-specific variants that located inside gene(s), and found a tandem duplication of several exons in another gene (gene X). Previous reports showed retinal degeneration in mice with conditional gene X depletion, which suggested possible effect of gene X structural variant on macular degeneration.

Academic Significance and Societal Importance of the Research Achievements

症状と家系情報から遺伝性疾患が疑われるにもかかわらず既知遺伝子変異が検出されない患者に対して、全エクソーム解析および全ゲノム解析をすることで疾患と関連する新規原因遺伝子候補を絞り込むことができた。患者のゲノム情報およびバリアント頻度と有害度予測により可能性の高い疾患原因と予想された変異であっても動物モデル等で患者症状を反映する表現型が得られない場合、生物種間の差だけでなくゲノム解析の方法に依存して検出できなかった変異が影響している可能性が示唆された。ゲノム解析で示される疾患原因変異の適切な解釈には実験系による検討が重要と考えられる。

Report

(6 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (13 results)

All 2023 2022 2021 2020 2019 2018

All Journal Article (5 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (6 results) (of which Int'l Joint Research: 3 results) Book (2 results)

  • [Journal Article] 遺伝性網膜疾患のゲノム解析2023

    • Author(s)
      須賀晶子・吉武和敏・岩田岳
    • Journal Title

      医学のあゆみ

      Volume: 285 Pages: 67-72

    • Related Report
      2022 Annual Research Report
  • [Journal Article] Genetic characterization of 1210 Japanese pedigrees with inherited retinal diseases by whole‐exome sequencing2022

    • Author(s)
      Suga Akiko、Yoshitake Kazutoshi、Fukuchi Takeo、Hatase Tetsuhisa、Horiguchi Masayuki、Shimada Yoshiaki、Tanikawa Atsuhiro、Yamamoto Shuichi、Miura Gen、Ito Nana、Murakami Akira、Fujimaki Takuro、Hotta Yoshihiro、Tanaka Koji、Iwata Takeshi、他
    • Journal Title

      Human Mutation

      Volume: 43 Issue: 12 Pages: 2251-2264

    • DOI

      10.1002/humu.24492

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Binding of Gtf2i-β/δ transcription factors to the ARMS2 gene leads to increased circulating HTRA1 in AMD patients and in?vitro2021

    • Author(s)
      Pan Yang、Iejima Daisuke、Nakayama Mao、Suga Akiko、Noda Toru、Kaur Inderjeet、Das Taraprasad、Chakrabarti Subhabrata、Guymer Robyn H.、DeAngelis Margaret M.、Yamamoto Megumi、Baird Paul N.、Iwata Takeshi
    • Journal Title

      Journal of Biological Chemistry

      Volume: 296 Pages: 100456-100456

    • DOI

      10.1016/j.jbc.2021.100456

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Novel mutations in malonyl-CoA-acyl carrier protein transacylase provoke autosomal recessive optic neuropathy.2020

    • Author(s)
      Li H, Yuan S, Minegishi Y, Suga A, Yoshitake K, Sheng X, Ye J, Smith S, Bunkoczi G, Yamamoto M, Iwata T
    • Journal Title

      Human Molecular Genetics

      Volume: 29 Issue: 3 Pages: 444-458

    • DOI

      10.1093/hmg/ddz311

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] LRRTM4-C538Y novel gene mutation is associated with hereditary macular degeneration with novel dysfunction of ON-type bipolar cells2018

    • Author(s)
      Yuichi Kawamura, Akiko Suga, Takuro Fujimaki, Kazutoshi Yoshitake, Kazushige Tsunoda, Akira Murakami, Takeshi Iwata
    • Journal Title

      Journal of Human Genetics

      Volume: 63 Pages: 893-900

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] The whole exome and genome analysis for inherited retinal diseases in Japanese population2023

    • Author(s)
      Akiko Suga
    • Organizer
      ISER2023
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 劣性遺伝性視神経萎縮症の新規原因遺伝子MCAT変異の同定と機能解析2020

    • Author(s)
      須賀 晶子
    • Organizer
      第68回日本臨床視覚電気生理学会
    • Related Report
      2020 Research-status Report
  • [Presentation] Genome-edited mouse model with Lrrtm4 mutation found in human macular dystrophy patients, showed light-induced photoreceptor degeneration.2019

    • Author(s)
      Akiko Suga
    • Organizer
      ARVO 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 家族性視神経萎縮症の新規原因遺伝子同定と機能解析2019

    • Author(s)
      須賀晶子
    • Organizer
      第12回Retina Research Meeting
    • Related Report
      2019 Research-status Report
  • [Presentation] 劣性遺伝性視神経萎縮症の新規原因遺伝子同定と機能解析2019

    • Author(s)
      須賀晶子
    • Organizer
      第24回眼科分子生物学研究会
    • Related Report
      2019 Research-status Report
  • [Presentation] Novel mutation in LRRTM4 is associated with dominantly inherited macular dystrophy with reduced ON-bipolar cell response.2018

    • Author(s)
      Akiko Suga, Yuichi Kawamura, Kazutoshi Yoshitake, Kazushige Tsunoda, Akira Murakami, Taheshi Iwata
    • Organizer
      ARVO 2018
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Book] Handbook of Laboratory Animal Science: Essential Principles and Practices2021

    • Author(s)
      Akiko Suga and Takeshi Iwata (Edited by Jann Hau and Steven J. Schapiro)
    • Total Pages
      1016
    • Publisher
      CRC Press, Taylor & Francis Group
    • ISBN
      9781138341807
    • Related Report
      2020 Research-status Report
  • [Book] 臨床応用に向けた疾患シーケンス解析(遺伝子医学MOOK34号)2018

    • Author(s)
      須賀晶子・吉武和敏・岩田岳
    • Total Pages
      228
    • Publisher
      メディカルドゥ
    • ISBN
      4944157282
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2024-01-30  

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