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Elucidation of a Novel Skin-to-Brain Drug Transport Mechanism Independent of the Blood-Brain Barrier

Research Project

Project/Area Number 22K18392
Research Category

Grant-in-Aid for Challenging Research (Pioneering)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 53:Organ-based internal medicine and related fields
Research InstitutionOsaka University

Principal Investigator

Wataya-Kaneda Mari  大阪大学, 大学院 医学系研究科, 寄附講座教授 (70397644)

Co-Investigator(Kenkyū-buntansha) 望月 秀樹  大阪大学, 大学院医学系研究科, 教授 (90230044)
前田 真一郎  大阪大学, 大学院薬学研究科, 講師 (60452398)
小池・熊谷 牧子  大阪大学, 大学院医学系研究科, 寄附講座助教 (30391949)
中村 歩  大阪大学, 医学部附属病院, 薬剤師 (40602686)
Project Period (FY) 2022-06-30 – 2025-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥26,000,000 (Direct Cost: ¥20,000,000、Indirect Cost: ¥6,000,000)
Fiscal Year 2024: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2023: ¥10,400,000 (Direct Cost: ¥8,000,000、Indirect Cost: ¥2,400,000)
Fiscal Year 2022: ¥10,400,000 (Direct Cost: ¥8,000,000、Indirect Cost: ¥2,400,000)
Keywordsシロリムス局所外用剤 / 結節性硬化症 / てんかん / 血液脳関門 / 神経の逆行性軸索輸送 / 新規薬剤輸送機構 / 中枢神経病変治療用外用薬 / mTORC1阻害剤 / シロリムス局所外用療法 / シロリムス
Outline of Research at the Start

結節性硬化症(TSC)はmTORC1(エムトールC1)の恒常的活性化で、全身に腫瘍やてんかんを発症する遺伝性疾患である。TSCの皮膚病変治療薬である、mTORC1阻害薬シロリムスの塗り薬を使用していた患者の中に、皮膚への少量塗布で血中シロリムス濃度の上昇なく、てんかんが改善する患者が現れた。そこでてんかんを有するTSCのモデルマウスで検討したところ、マウスでも同様の結果が得られた。皮膚塗布により、シロリムスが血液を介さずに、脳へ輸送された可能性が考えられた。本研究ではその機構の解明を行う。

Outline of Final Research Achievements

Topical application of the mTORC1 inhibitor sirolimus, used for treating skin lesions in tuberous sclerosis complex (TSC) patients, improved and resolved seizures in a patient without increasing blood sirolimus levels. This suggested a novel blood-independent pathway for sirolimus transport from the skin to the brain. Therefore, we investigated this novel mechanism of drug delivery from the skin to the brain.
In a TSC model mouse, topical application of sirolimus improved seizures. However, when the innervating nerves at the application site were transected, this effect was lost, and the sirolimus concentration in the brain was reduced to zero. These findings confirmed that sirolimus was delivered to the brain and exerted its effects via a novel, nerve-mediated skin-to-brain pathway.

Academic Significance and Societal Importance of the Research Achievements

薬剤が皮膚から脳へ神経細胞を介して輸送されて作用する報告はない。シロリムスの塗り薬の皮膚への少量塗布で神経の軸索輸送を介した脳への薬剤輸送が可能であれば、皮膚と脳を結ぶ新規の経路の解明が期待できる。他の中枢神経疾患治療薬においても同様の機序が期待でき、中枢薬の開発を阻む血液脳関門を介することなく、副作用の少ない中枢神経病変の治療が可能になるだけでなく、現在病態が不明で確立された有効な治療法のない神経変性疾患や認知症の治療のブレークスルーになり、中枢神経病変の研究や治療法の開発を加速させる事ができる。特に認知症の改善治癒が可能になれば、高齢化社会においては社会経済的にも大きな転換を期待できる。

Report

(5 results)
  • 2024 Annual Research Report   Final Research Report ( PDF )
  • 2023 Research-status Report
  • 2022 Comments on the Screening Results   Research-status Report
  • Research Products

    (24 results)

All 2025 2024 2023 2022

All Journal Article (15 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 15 results,  Open Access: 4 results) Presentation (3 results) (of which Int'l Joint Research: 3 results) Book (6 results)

  • [Journal Article] Tuberous Sclerosis Complex2025

    • Author(s)
      Wataya-kaneda Mari
    • Journal Title

      The Keio Journal of Medicine

      Volume: 74 Issue: 1 Pages: 42-51

    • DOI

      10.2302/kjm.2023-0011-IR

    • ISSN
      0022-9717, 1880-1293
    • Related Report
      2023 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Distribution of shagreen patches and fibrous cephalic plaques in patients with tuberous sclerosis complex: A retrospective cohort study2024

    • Author(s)
      Takahashi Aya、Hattori Satoshi、Sakai Ena、Yang Lingli、Katayama Ichiro、Fujimoto Manabu、Wataya-Kaneda Mari
    • Journal Title

      Journal of the American Academy of Dermatology

      Volume: 90 Issue: 4 Pages: 849-852

    • DOI

      10.1016/j.jaad.2023.11.061

    • Related Report
      2023 Research-status Report
    • Peer Reviewed
  • [Journal Article] Distinct Transcriptional Profiles in the Different Phenotypes of Neurofibroma from the Same Subject with Neurofibromatosis 12024

    • Author(s)
      Wang Wei-Ning、Koguchi-Yoshioka Hanako、Nimura Keisuke、Watanabe Rei、Tanemura Atsushi、Fujimoto Manabu、Wataya-Kaneda Mari
    • Journal Title

      Journal of Investigative Dermatology

      Volume: 144 Issue: 1 Pages: 133-141.e4

    • DOI

      10.1016/j.jid.2023.03.1688

    • Related Report
      2023 Research-status Report
    • Peer Reviewed
  • [Journal Article] Validation of the Index for Facial Angiofibromas: Data analysis from a randomized controlled trial of sirolimus gel treatment in patients with tuberous sclerosis complex2024

    • Author(s)
      Hamada Izumi、Yukutake Yoshinori、Morita Yusuke、Ishikawa Norifumi、Shimizu Kenji、Wataya‐Kaneda Mari
    • Journal Title

      The Journal of Dermatology

      Volume: ー Issue: 6 Pages: 752-758

    • DOI

      10.1111/1346-8138.17220

    • Related Report
      2023 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Pilot Study for the Treatment of Cutaneous Neurofibromas in Neurofibromatosis Type 1 Patients Using Topical Sirolimus Gel2023

    • Author(s)
      Wataya-Kaneda M*, Watanabe Y, Nakamura A, Yamamoto K, Okada K, Maeda S, Nimura K, Saga K, Katayama I
    • Journal Title

      Journal of the American Academy of Dermatology

      Volume: 88 Pages: 877-880

    • Related Report
      2023 Research-status Report
    • Peer Reviewed
  • [Journal Article] Verification of the efficacy of topical sirolimus gel for systemic rare vascular malformations: a pilot study2023

    • Author(s)
      Wataya‐Kaneda Mari、Maeda Shinichirou、Nakamura Ayumi、Hayashi Misa、Fujimoto Manabu
    • Journal Title

      The Journal of Dermatology

      Volume: 50 Issue: 12 Pages: 1619-1624

    • DOI

      10.1111/1346-8138.16930

    • Related Report
      2023 Research-status Report
    • Peer Reviewed
  • [Journal Article] Pilot study for the treatment of cutaneous neurofibromas in neurofibromatosis type 1 patients using topical sirolimus gel2023

    • Author(s)
      Wataya-Kaneda Mari、Watanabe Yoshiyuki、Nakamura Ayumi、Yamamoto Kouji、Okada Kiyoshi、Maeda Shinichiro、Nimura Keisuke、Saga Kotaro、Katayama Ichiro
    • Journal Title

      Journal of the American Academy of Dermatology

      Volume: 88 Issue: 4 Pages: 877-880

    • DOI

      10.1016/j.jaad.2022.08.066

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Author reply to "WNT10A variant and severe scoliosis?"2022

    • Author(s)
      Koguchi-Yoshioka H, et al. Among authors: katayama i.
    • Journal Title

      J Dermatol.

      Volume: 49 Issue: 11

    • DOI

      10.1111/1346-8138.16560

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Validation of the Index for Facial Angiofibromas: A new scoring tool to assess facial angiofibromas in the tuberous sclerosis complex2022

    • Author(s)
      Dill Patricia Elsa、Bessis Didier、Guidi Beatrice、Hadj-Rabia Smail、Itin Peter、Koenig Mary Kay、Moreno-Artero Ester、Erlanger Tobias E.、Cattaneo Marco、Weber Peter、Wataya-Kaneda Mari
    • Journal Title

      Journal of the American Academy of Dermatology

      Volume: 87 Issue: 6 Pages: 1448-1450

    • DOI

      10.1016/j.jaad.2022.07.041

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Abnormal White Matter Microstructure in the Limbic System Is Associated With Tuberous Sclerosis Complex-Associated Neuropsychiatric Disorders2022

    • Author(s)
      Sato, Akemi Tominaga, Koji Iwatani, Yoshiko Kato, Yoko Wataya-Kaneda, Mari Makita, Kai Nemoto, Kiyotaka Taniike, Masako Kagitani-Shimono, Kuriko
    • Journal Title

      Frontiers in Neurology

      Volume: 13 Pages: 1-15

    • DOI

      10.3389/fneur.2022.782479

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Familial Michelin tire baby syndrome.2022

    • Author(s)
      [Mami Hayashi,Mari Wataya-Kaneda,Hanako Koguchi-Yoshioka,Noriko Arase,Tateki Kubo,Hajime Nakano,Manabu Fujimoto]
    • Journal Title

      The Journal of dermatology

      Volume: - Issue: 7

    • DOI

      10.1111/1346-8138.16346

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Sirolimus relieves seizures and neuropsychiatric symptoms via changes of microglial polarity in tuberous sclerosis complex model mice2022

    • Author(s)
      Makiko Koike-Kumagai, Manabu Fujimoto, Mari Wataya-Kaneda
    • Journal Title

      Neuropharmacology

      Volume: 218 Pages: 1-16

    • DOI

      10.1016/j.neuropharm.2022.109203

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Sirolimus relieves seizures and neuropsychiatric symptoms via changes of microglial polarity in tuberous sclerosis complex model mice2022

    • Author(s)
      Makiko Koike-Kumagai, Mari Wataya-Kaneda*
    • Journal Title

      J Exp Neurol.

      Volume: 3 Pages: 63-70

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Clinical practice guidelines for pseudoxanthoma elasticum (2017)2022

    • Author(s)
      Iwanaga Akira、Utani Atsushi、Koike Yuta、Okubo Yumi、Kuwatsuka Yutaka、Endo Yuichiro、Tanizaki Hideaki、Wataya‐Kaneda Mari、Hatamochi Atsushi、Minaga Kosuke、Ogi Tomoo、Yamamoto Yosuke、Ikeda Satoshi、Tsuiki Eiko、Tamura Hiroshi、Maemura Koji、Kitaoka Takashi、Murota Hiroyuki
    • Journal Title

      The Journal of Dermatology

      Volume: 49 Issue: 3 Pages: 91-98

    • DOI

      10.1111/1346-8138.16301

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Distribution of hypomelanotic macules in tuberous sclerosis complex: A retrospective cohort study2022

    • Author(s)
      Takahashi A, et al. Among authors: katayama i,
    • Journal Title

      J Am Acad Dermatol.

      Volume: 87 Issue: 1 Pages: 237-240

    • DOI

      10.1016/j.jaad.2021.07.071

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Presentation] Distinct transcriptional profiles in the different phenotypes of neurofibroma from the same neurofibromatosis 1 subject2023

    • Author(s)
      Wei-Ning Wang1, Hanako Koguchi-Yoshioka, Rei Watanabe, Manabu Fujimoto, and Mari Wataya-Kaneda
    • Organizer
      1st International Societies for Investigative Dermatology Meeting
    • Related Report
      2023 Research-status Report
    • Int'l Joint Research
  • [Presentation] Epilepsy and TAND in the tuberous sclerosis complex are caused by an alteration in microglial polarity to M1 and sirolimus cures them by returning microglial polarity to M2.2023

    • Author(s)
      Emi Kaeda, Makiko Koike-Kumagai, Mari Wataya-Kaneda
    • Organizer
      2023 International TSC Research Conference
    • Related Report
      2023 Research-status Report
    • Int'l Joint Research
  • [Presentation] Sirolimus alters microglial polarity leading to improvement of neuropsychiatric symptoms of tuberous sclerosis complex mice model.2023

    • Author(s)
      Makiko Koike-Kumagai, Mari Wataya-Kaneda
    • Organizer
      1 st. International Conference of Neuroscience and Neurology. Hybrid event in Dubai, UAE
    • Related Report
      2023 Research-status Report
    • Int'l Joint Research
  • [Book] 結節性硬化症2023

    • Author(s)
      金田 眞理
    • Total Pages
      6
    • Publisher
      (株)総合医学社
    • ISBN
      9784883784691
    • Related Report
      2023 Research-status Report
  • [Book] 結節性硬化症の治療の進歩2023

    • Author(s)
      金田 眞理
    • Total Pages
      8
    • Publisher
      科学評論社
    • Related Report
      2023 Research-status Report
  • [Book] プライマリケアで重要な皮膚症状とその対応 白斑2023

    • Author(s)
      金田 眞理
    • Total Pages
      6
    • Publisher
      診断と治療社
    • Related Report
      2023 Research-status Report
  • [Book] 結節性硬化症の皮膚病変に対するシロリムスゲルの効果および今後の問題点2023

    • Author(s)
      金田 眞理
    • Total Pages
      6
    • Publisher
      マルホ株式会社
    • Related Report
      2023 Research-status Report
  • [Book] 「皮膚科の臨床」臨時増刊号2022

    • Author(s)
      金田眞理
    • Total Pages
      5
    • Publisher
      金原出版
    • Related Report
      2022 Research-status Report
  • [Book] 皮膚アレルギーフロンティア 2022.5 Vol,20 No.12022

    • Author(s)
      金田眞理
    • Total Pages
      1
    • Publisher
      (株)メディカルレビュー社
    • Related Report
      2022 Research-status Report

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Published: 2022-07-05   Modified: 2026-01-16  

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