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A study to identify causative genes for high salt preference in the spontaneously hypertensive rat, a genetic model rat for hypertension.

Research Project

Project/Area Number 23K21628
Project/Area Number (Other) 21H03374 (2021-2023)
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeMulti-year Fund (2024)
Single-year Grants (2021-2023)
Section一般
Review Section Basic Section 59040:Nutrition science and health science-related
Research InstitutionShimane University

Principal Investigator

Nabika Toru  島根大学, 学術研究院医学・看護学系, 特任教授 (50180534)

Co-Investigator(Kenkyū-buntansha) 横田 茂文  島根大学, 学術研究院医学・看護学系, 准教授 (50294369)
須山 幹太  九州大学, 生体防御医学研究所, 教授 (70452365)
加藤 規弘  国立研究開発法人国立国際医療研究センター, その他部局等, 部長 (80293934)
硲 哲崇  朝日大学, 歯学部, 教授 (90243154)
Project Period (FY) 2024-04-01 – 2025-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2024: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2023: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2021: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
Keywords食塩嗜好性 / QTL解析 / SHR / epithelilal Na channel / 遺伝解析 / epithelial Na Channel / 関連分析 / 高血圧 / epithelial Na channel / 味覚 / 減塩 / 遺伝子
Outline of Research at the Start

本研究の目標は、SHRの食塩嗜好性遺伝子を同定し、塩味が好ましいと感じる遺伝的メカニズムを明らかにすること、その知見を活かして新たな発想にもとづく減塩法の開発につなげることである。本研究では、次世代シークエンス技術を応用した新たなSNPタイピング法を用いることで、従来の10倍の精度での解析を可能にし、候補遺伝子の迅速な同定を達成する。同時に、神経科学的な方法論を用いて、SHRとWKYの塩味に対する反応性の違いを詳細に分析し、得られた遺伝子情報を加味することで、食塩嗜好性の生理メカニズムを明らかにする。得られた情報はヒトでの遺伝解析に応用する。

Outline of Final Research Achievements

The spontaneously hypertensive rat (SHR), a genetic model rat of hypertension, is known to prefer salt water more than does the control Wistar-Kyoto rat (WKY). We conducted genetic as well as physiological experiments to identify the mechanism of the high salt preference in SHR. We found that 1) the causative gene(s) is in the telomeric region of the chromosome (Chr) 3 through a QTL analysis, and the result was confirmed in a congenic rat harboring a WKY fragment of Chr 3 on the SHR background, that 2) amiloride as well as denervation of the tympanic nerve reduced the salt preference in SHR, suggesting the important role of the epithelial Na channel on the tongue, and that 3) pre-LC, a brain nucleus known to drive salt appetite, was less active in SHR compared with WKY. These observations would help to identify the causative gene(s) for salt preference, and to develop a new strategy for reduction of salt intake in humans.

Academic Significance and Societal Importance of the Research Achievements

ヒトは生来、食塩を「美味しい」と感じて摂ろうとする機構を備えている。これは、ナトリウムが必須のミネラルであるのに、摂取することが難しかったために発達した機構であるが、現代社会では、食塩過剰摂取を招き、高血圧をはじめとする生活習慣病の重要な要因となっている。
本研究で、高血圧の遺伝的モデルラットSHRにおける食塩過剰摂取の原因遺伝子のひとつがラットの第3染色体の端に存在することが明らかとなった。また、SHRと対照ラットであるWKYの比較から、舌の塩味受容体や脳のpre-LCが重要な役割を果たしている可能性が示唆された。これらの結果は、食塩嗜好性の生理的機構を明らかにする上で貴重な成果である。

Report

(5 results)
  • 2024 Annual Research Report   Final Research Report ( PDF )
  • 2023 Annual Research Report
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (13 results)

All 2025 2024 2023 2022 2021

All Journal Article (12 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 12 results,  Open Access: 3 results) Presentation (1 results)

  • [Journal Article] NAD+ deficiency plays essential roles in the hyperuricemia of stroke-prone spontaneously hypertensive rat via xanthine dehydrogenase to xanthine oxidase conversion2025

    • Author(s)
      Ferdaus Sara Amelia、Ohara Hiroki、Matsuo Hiroyuki、Kawakami Kohei、Takeuchi Fumihiko、Fujikawa Koichi、Kawakita Emi、Kato Norihiro、Nabika Toru、Kanasaki Keizo
    • Journal Title

      Biochemical and Biophysical Research Communications

      Volume: 744 Pages: 151136-151136

    • DOI

      10.1016/j.bbrc.2024.151136

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A genome-wide association study identifies a locus associated with knee extension strength in older Japanese individuals2024

    • Author(s)
      Ito S、Takuwa H、Kakehi S、Someya Y、Kaga H、Kumahashi N、Kuwata S、Wakatsuki T、Kadowaki M, Yamamoto S、Abe T、Takeda M、Ishikawa Y、Liu X、Otomo N、Suetsugu H、Koike Y、Hikino K、Tomizuka K、Momozawa Y、Ozaki K、Isomura M、Nabika T、Kaneko H、Ishijima M、Kawamori R、Watada H、Tamura Y、Uchio Y, Ikegawa S、Terao C
    • Journal Title

      Communications Biology

      Volume: 7 Issue: 1 Pages: 513-513

    • DOI

      10.1038/s42003-024-06108-6

    • Related Report
      2024 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Association of lysophosphatidic acid molecules with liver fibrosis: different roles indicated2023

    • Author(s)
      Tobita Hiroshi、Sakai Hiromichi、Yamaguchi Akane、Notsu Yoshitomo、Kataoka Masatoshi、Yazaki Tomotaka、Nabika Toru、Ishihara Shunji、Kobayashi Hironori
    • Journal Title

      Journal of Clinical Biochemistry and Nutrition

      Volume: 73 Issue: 3 Pages: 255-261

    • DOI

      10.3164/jcbn.23-58

    • ISSN
      0912-0009, 1880-5086
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Genotypes of Stim1 and the proximal region on chromosome 1 exert opposite effects on stroke susceptibility in stroke-prone spontaneously hypertensive rat2023

    • Author(s)
      Ohara Hiroki、Takeuchi Fumihiko、Kato Norihiro、Nabika Toru
    • Journal Title

      Journal of Hypertension

      Volume: 42 Issue: 1 Pages: 118-128

    • DOI

      10.1097/hjh.0000000000003566

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Associations between dairy consumption and the physical function in Japanese community-dwelling older adults: The Shimane CoHRE study2023

    • Author(s)
      Miyazaki Ryo、Abe Takafumi、Sakane Naoki、Ando Hitoshi、Yano Shozo、Okuyama Kenta、Isomura Minoru、Yamasaki Masayuki、Nabika Toru
    • Journal Title

      Geriatric Nursing

      Volume: 53 Pages: 19-24

    • DOI

      10.1016/j.gerinurse.2023.06.014

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Association between flexibility activity and blood‐pressure change among older adults in Japan: A 5‐year longitudinal study2023

    • Author(s)
      Abe Takafumi、Okuyama Kenta、Kamada Masamitsu、Kitayuguchi Jun、Hamano Tsuyoshi、Waki Hidefumi、Nabika Toru、Isomura Minoru、Sundquist Kristina
    • Journal Title

      Scandinavian Journal of Medicine & Science in Sports

      Volume: 33 Issue: 8 Pages: 1552-1559

    • DOI

      10.1111/sms.14386

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Apolipoprotein E-depletion accelerates arterial fat deposition in the spontaneously hypertensive rat2023

    • Author(s)
      Matsuo Hiroyuki、Kawakami Kohei、Ohara Hiroki、Kaneko Takehito、Mashimo Tomoji、Yamada Takaya、Nabika Toru
    • Journal Title

      Experimental Animals

      Volume: 72 Issue: 4 Pages: 439-445

    • DOI

      10.1538/expanim.23-0012

    • ISSN
      0007-5124, 1341-1357, 1881-7122
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Genetic modifications to alter blood pressure level2022

    • Author(s)
      Ohara H, Nabika T
    • Journal Title

      Biomedicine

      Volume: 10 Issue: 8 Pages: 1855-1855

    • DOI

      10.3390/biomedicines10081855

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Reduced masticatory performance and not using dentures are associated with hypertension in older adults with tooth loss: the Shimane CoHRE study.2022

    • Author(s)
      Abe T, Tominaga K, Ando Y, Hamano T, Yano S, Isomura M, Nabika T.
    • Journal Title

      Hypertens Res

      Volume: 45 Pages: 1553-1562

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A 3-Mbp fragment on rat chromosome 1 affects susceptibility both to stroke and kidney injury under salt loading in the stroke-prone spontaneously hypertensive rat: a genetic approach using multiple congenic strains2022

    • Author(s)
      WANG Mei、OHARA Hiroki、EGAWA Masahiro、FUKUNAGA Shohei、MATSUO Hiroyuki、GE Zhi-Ru、NABIKA Toru
    • Journal Title

      Experimental Animals

      Volume: 71 Issue: 3 Pages: 368-375

    • DOI

      10.1538/expanim.21-0189

    • ISSN
      0007-5124, 1341-1357, 1881-7122
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Milk Fermented with Mushrooms Prevents Stroke in the Stroke-Prone Spontaneously Hypertensive Rats Independently of Blood Pressure2022

    • Author(s)
      Mahal Zinat、Matsuo Hiroyuki、Zahid Hasan M.、Notsu Yoshitomo、Ohara Hiroki、Okamoto Kenji、Nabika Toru
    • Journal Title

      Journal of Stroke and Cerebrovascular Diseases

      Volume: 31 Issue: 5 Pages: 106421-106421

    • DOI

      10.1016/j.jstrokecerebrovasdis.2022.106421

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Associations between physical frailty and living arrangements in Japanese older adults living in a rural remote island: The Shimane <scp>CoHRE</scp> study2022

    • Author(s)
      Miyazaki Ryo、Abe Takafumi、Yano Shozo、Okuyama Kenta、Sakane Naoki、Ando Hitoshi、Isomura Minoru、Yamasaki Masayuki、Nabika Toru
    • Journal Title

      Journal of General and Family Medicine

      Volume: 23 Issue: 5 Pages: 310-318

    • DOI

      10.1002/jgf2.544

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] SHRにおける食塩嗜好性の探索2021

    • Author(s)
      並河徹、Fahadur Reza、吉原美奈子、須山幹太、硲哲崇
    • Organizer
      第57回高血圧関連疾患モデル学会学術総会
    • Related Report
      2021 Annual Research Report

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Published: 2021-04-28   Modified: 2026-01-16  

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