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TRP-channelタンパクの歯髄感覚受容における機能解明

Research Project

Project/Area Number 19659495
Research Category

Grant-in-Aid for Exploratory Research

Allocation TypeSingle-year Grants
Research Field Conservative dentistry
Research InstitutionTokyo Medical and Dental University

Principal Investigator

池田 英治  Tokyo Medical and Dental University, 歯学部附属病院, 講師 (20222896)

Project Period (FY) 2007 – 2008
Project Status Completed (Fiscal Year 2008)
Budget Amount *help
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 2008: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2007: ¥1,300,000 (Direct Cost: ¥1,300,000)
KeywordsTRP受容器タンパク / イオンチャンネル / カプサイシン / 歯痛 / 侵害受容性 / TRPA受容器 / TRPM受容器 / TRPV受容器 / 歯髄 / 痛み / TRP super-family / TRPV1 / 温度感受性 / チャンネルタンパク / 伝導速度
Research Abstract

1. TRPV1受容器タンパクのヒト歯髄内局在を免疫組織学的に検出すると
(1) N52とNFH陽性歯髄神経線維が、コンフォーカル顕微鏡で歯髄表層に豊富に認められた。
(2)髄鞘のないN52陽性歯髄神経線維にTRIPV1の発現が強く認められた。
(3) S-100で同定したシュワン細胞にTRIPV1の発現が強く認められた。
2. ヒト炎症歯髄と健康歯髄のソディウムチャンネルの相違をみると
(1) Sodium channel Nav 1.6がコンフォーカル顕微鏡を用いて、ヒトの炎症歯髄で正常歯髄より多く検出された。
3. RT-PCR法により各種TRP受容体の有無をヒト歯髄で確認すると
(1) TRPV1, TRPV2, TRPM8, TRPA1の発現はヒト象牙芽細胞では見られなかったが、TRPC1, TRPV4は認められた。
4. 歯髄感覚A線維のカプサイシン受容性をネコ歯髄で電気生理学的に検出すると
(1) 歯髄内TRP-channel受容体に起因すると考えられるカプサイシン受容性が歯髄感覚神経のポリモーダル性のAδ線維とC線維にあることは十分予測され、その通りカプサイシンによって初期興奮性に、後に抑制性に働くことが単離した感覚神経で電気生理学的に証明された。
(2) しかし、併せて、もっと伝導速度の速いAβ領域の感覚線維の終末分岐部においてカプサイシンが抑制性に働くことが示された。

Report

(2 results)
  • 2008 Annual Research Report
  • 2007 Annual Research Report
  • Research Products

    (35 results)

All 2009 2008 2007 Other

All Journal Article (12 results) (of which Peer Reviewed: 9 results) Presentation (19 results) Book (4 results)

  • [Journal Article] 歯内治療に関連する慢性痛(侵害受容性疼痛と因性疼痛)について2008

    • Author(s)
      池田英治
    • Journal Title

      日本歯内療法学会雑誌 vol29, no2

      Pages: 107-112

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Functional syncitium through gap-junctional communication between human odontoblasts.2008

    • Author(s)
      Ikeda H, Suda H
    • Journal Title

      J Dental Research (In press)

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 初期う蝕下の狭窄した象牙細管における細管内容液の外向き流の変化が細菌性LPSの歯髄内拡散に及ぼす影響2007

    • Author(s)
      池田英治, 須田英明
    • Journal Title

      日歯保存誌 51

      Pages: 9-16

    • NAID

      110007151152

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Gap-junctionを介した象牙芽細胞複合体の電気的・化学的細胞間連絡の解析2007

    • Author(s)
      池田英治、須田英明
    • Journal Title

      日本歯科保存学会雑誌 春季特別号

      Pages: 37-37

    • Related Report
      2007 Annual Research Report
  • [Journal Article] Age-related Difference of Transjunctional Communication between Fresh Human Odontoblasts2007

    • Author(s)
      Ikeda H, Suda H
    • Journal Title

      J Dental Research Spec Iss

      Pages: 234-234

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Transjunctional Propagation of Electrical Signals with Little Attenuation between Fresh Human Odontoblasts2007

    • Author(s)
      Ikeda H, Suda H
    • Journal Title

      International Endodontic Journal Spec Iss

      Pages: 316-316

    • Related Report
      2007 Annual Research Report
  • [Journal Article] ヒト象牙芽細胞が刺激センサーとして働く可能性について2007

    • Author(s)
      池田英治、須田英明
    • Journal Title

      日本歯科保存学会雑誌 秋季特別号

      Pages: 45-45

    • NAID

      10019830709

    • Related Report
      2007 Annual Research Report
  • [Journal Article] Transjunctional Propagation of Electrical Signals with Little Attenuation between Fresh Human Odontoblasts2007

    • Author(s)
      Ikeda H, Suda H
    • Journal Title

      J Dental Research Spec Iss

      Pages: 453-453

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Microcirculation of the Pulp

    • Author(s)
      Ikeda H
    • Journal Title

      Microcirculation of the pulp (In press)

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 歯内治療に関与する歯の形態異常

    • Author(s)
      池田英治
    • Journal Title

      日本歯科医学会雑誌 (In press)

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Lack of evidence for a role of human odontoblasts as sensory receptor cells

    • Author(s)
      Ikeda H, Suda I
    • Journal Title

      J Endodontics (In press)

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Dens invaginatus coexisting with dens evaginatus in a mandibular lateral incisor-An effort to preserve tooth vitality-

    • Author(s)
      Ikeda H, Suda H
    • Journal Title

      Australian Endodontic J (In press)

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Presentation] Functional Syncitium of Human Odontoblasts2009

    • Author(s)
      Ikeda H
    • Organizer
      Biological Approach of Dental Pain (From Molecular to System)
    • Place of Presentation
      大韓民国ソウル市
    • Year and Date
      2009-03-07
    • Related Report
      2008 Annual Research Report
  • [Presentation] Electrophysiological Approach for Odontoblast Cell Membrane2009

    • Author(s)
      Ikeda H
    • Organizer
      Pulp Biology Meeting, Thai Association for Dental Research
    • Place of Presentation
      タイ王国ナレースワン市
    • Year and Date
      2009-01-10
    • Related Report
      2008 Annual Research Report
  • [Presentation] Facilitated chemical delivery through human enamel/dentin with AC-iontophoresis2008

    • Author(s)
      Ikeda H
    • Organizer
      Japanese Association for Dental Research
    • Place of Presentation
      愛知学院大学(名古屋市)
    • Year and Date
      2008-11-30
    • Related Report
      2008 Annual Research Report
  • [Presentation] Drug delivery through human enamel by AC-iontophoresismeasured with conductometry2008

    • Author(s)
      Ikeda H
    • Organizer
      KACD-JSCD 10th Joint Meet ing
    • Place of Presentation
      大韓民国ソウル市
    • Year and Date
      2008-11-28
    • Related Report
      2008 Annual Research Report
  • [Presentation] 歯内治療に関与する歯の形態異常2008

    • Author(s)
      池田英治
    • Organizer
      歯科医学会総会学術大会
    • Place of Presentation
      横浜市
    • Year and Date
      2008-11-11
    • Related Report
      2008 Annual Research Report
  • [Presentation] 三次元的なヒト象牙芽細胞問カップリングネットワーク2008

    • Author(s)
      池田英治
    • Organizer
      日本歯科保存学会 秋季
    • Place of Presentation
      富山市
    • Year and Date
      2008-11-07
    • Related Report
      2008 Annual Research Report
  • [Presentation] Functional Syncitium through Gap Junction in the Human Odontoblastic Layer2008

    • Author(s)
      Ikeda H
    • Organizer
      国際疼痛学会シンポジウム
    • Place of Presentation
      連合王国エジンバラ市
    • Year and Date
      2008-08-08
    • Related Report
      2008 Annual Research Report
  • [Presentation] Direct Cell-to-cell Coupling Network in Human Odontoblasts in Sectioned Tooth Disk2008

    • Author(s)
      Ikeda H
    • Organizer
      International Association for Dental Research
    • Place of Presentation
      カナダ国トロント市
    • Year and Date
      2008-07-03
    • Related Report
      2008 Annual Research Report
  • [Presentation] 電気伝導度測定を用いて計測したヒトェナメル質の物質透過性2008

    • Author(s)
      池田英治
    • Organizer
      日本歯科保存学会 春季
    • Place of Presentation
      新潟市
    • Year and Date
      2008-06-05
    • Related Report
      2008 Annual Research Report
  • [Presentation] Microcirculation of Dental Pulp2008

    • Author(s)
      Ikeda H
    • Organizer
      Pulp Biology Meeting, Korean Association for Dental Research
    • Place of Presentation
      大韓民国デグ市
    • Year and Date
      2008-04-29
    • Related Report
      2008 Annual Research Report
  • [Presentation] Electrophysiological Evidence of Functional Syncitium in the Human Odontoblastic Layer2008

    • Author(s)
      Ikeda H
    • Organizer
      Pulp Biology Meeting, Korean Association for Dental Research
    • Place of Presentation
      大韓民国デグ市
    • Year and Date
      2008-04-28
    • Related Report
      2008 Annual Research Report
  • [Presentation] Human Odontoblasts Communi cate with Each Other throughCe11-to-ce11 Coup ling2008

    • Author(s)
      Ikeda H
    • Organizer
      Korean Association of Endodont ics
    • Place of Presentation
      大韓民国光州市
    • Year and Date
      2008-04-26
    • Related Report
      2008 Annual Research Report
  • [Presentation] Odontoblasts talk with each other through electrical coupling2008

    • Author(s)
      池田英治
    • Organizer
      歯髄細胞 ソウル大学主催サテライトシンポジウム
    • Place of Presentation
      大韓民国ソウル市
    • Year and Date
      2008-03-08
    • Related Report
      2007 Annual Research Report
  • [Presentation] A Transjunctional Propagation of Electrical Signals with Little Attenubetween Fresh Human Odontoblasts2007

    • Author(s)
      Ikeda H, Suda H
    • Organizer
      Japanese Association for Dental Research
    • Place of Presentation
      横浜市
    • Year and Date
      2007-11-17
    • Related Report
      2007 Annual Research Report
  • [Presentation] ヒト象牙芽細胞が刺激センサーとして働く可能性について2007

    • Author(s)
      池田英治、須田英明
    • Organizer
      日本歯科保存学会秋季学術大会
    • Place of Presentation
      岡山市
    • Year and Date
      2007-11-09
    • Related Report
      2007 Annual Research Report
  • [Presentation] Transjunctional Propagation of Electrical Signals with Little Attenuation between Fresh Human Odontoblasts2007

    • Author(s)
      Ikeda H, Suda H
    • Organizer
      13th Biennial Congress of the European Society of Endodontology
    • Place of Presentation
      Istanbul, Turkey
    • Year and Date
      2007-09-07
    • Related Report
      2007 Annual Research Report
  • [Presentation] Gap-junctionを介した象牙芽細胞複合体の電気的・化学的細胞間連絡の解析2007

    • Author(s)
      池田英治、須田英明
    • Organizer
      日本歯科保存学会春季学術大会
    • Place of Presentation
      さいたま市
    • Year and Date
      2007-06-07
    • Related Report
      2007 Annual Research Report
  • [Presentation] 根管充填及び歯冠修復の質と根尖歯周組織病変の関係 -X線写真による評価-2007

    • Author(s)
      池田英治, 篠澤美佐江, 須田英明
    • Organizer
      日本歯内療法学会
    • Place of Presentation
      広島市
    • Year and Date
      2007-05-26
    • Related Report
      2007 Annual Research Report
  • [Presentation] Chronic Pain Associated with Endodontic Treatment2007

    • Author(s)
      Ikeda H, Suda H
    • Organizer
      日本歯内療法学会
    • Place of Presentation
      広島市
    • Year and Date
      2007-05-26
    • Related Report
      2007 Annual Research Report
  • [Book] Seltzer and Bender's The Dental Pulp(Chapter 6, Circulation of the pulp)2009

    • Author(s)
      Ikeda H, Suda H
    • Total Pages
      498
    • Publisher
      Qu intessence International Publisher
    • Related Report
      2008 Annual Research Report
  • [Book] 『口腔顎顔面痛のガイドライン』改訂版(Chapter7, Intraoral Pain Disorder)2009

    • Author(s)
      Ikeda H, Suda H
    • Total Pages
      450
    • Publisher
      Quintessence International Publisher
    • Related Report
      2008 Annual Research Report
  • [Book] Seltzer and Bender's The Dental Pulp2008

    • Author(s)
      Ikeda H, Suda H
    • Total Pages
      423
    • Publisher
      Quintessence Publishing
    • Related Report
      2007 Annual Research Report
  • [Book] 教科書にはない臨床テクニック&トラブル解決法象牙質知覚過敏症の診断と治療方針2007

    • Author(s)
      池田英治
    • Total Pages
      2
    • Publisher
      デンタルダイアモンド社
    • Related Report
      2007 Annual Research Report

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Published: 2007-04-01   Modified: 2016-04-21  

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