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Analysis of molecular target for oral squamous cell carcinoma.

Research Project

Project/Area Number 20592329
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Surgical dentistry
Research InstitutionOsaka University

Principal Investigator

MATSUOKA Yudai  Osaka University, 大学院・歯学研究科, 招聘教員 (50448148)

Co-Investigator(Kenkyū-buntansha) NAKAHARA Hirokazu  大阪大学, 大学院・歯学研究科, 招聘教員 (70324796)
KOGO Mikihiko  大阪大学, 大学院・歯学研究科, 教授 (20205371)
Project Period (FY) 2008 – 2010
Project Status Completed (Fiscal Year 2010)
Budget Amount *help
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2010: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2009: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2008: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Keywords口腔外科学一般 / 口腔扁平上皮癌 / アポトーシス / 低分子Gたんばく質 / Rac / 低分子Gたんぱく質
Research Abstract

Among Rho family members, Rac has been implicated in the regulation of cell survival and apoptosis. However, the mechanisms underlying this process have not been fully elucidated. Here, we report that inhibition of Rac by a Rac-specific small molecule inhibitor, NSC23766, or transfection of dominant negative Rac (Rac-DN) elicits apoptosis in highly malignant oral squamous carcinoma cells (OSC-19 cells). Upon suppression of Rac, we observed up-regulation of c-Jun N-terminal kinase (JNK) and condensation of nuclei, leading to caspase-dependent apoptosis. Pretreatment with a JNK-specific inhibitor, SP600125, decreased the effect of Rac inhibition on apoptosis, indicating that activation of JNK strongly correlates with apoptosis. Protein phosphatase 5 (PP5) has recently been reported as a downstream effector of Rac signaling. Stimulation of PP5 rescued apoptosis caused by Rac inhibition by dephosphorylating JNK. These results demonstrate that inhibition of Rac activity leads to the suppression of PP5 activity, which results in extensive activation of JNK and caspase-dependent apoptosis. Taken together, Rac inhibition may represent a novel therapeutic approach for oral squamous carcinoma.

Report

(4 results)
  • 2010 Annual Research Report   Final Research Report ( PDF )
  • 2009 Annual Research Report
  • 2008 Annual Research Report
  • Research Products

    (18 results)

All 2011 2010 2009 2008

All Journal Article (9 results) (of which Peer Reviewed: 9 results) Presentation (9 results)

  • [Journal Article] FDG-positive Warthin's tumor in a neck node mimicking metastasis in primary intraosseous left posterior mandibular cancer staging with PET/CT.2011

    • Author(s)
      Enomoto A, Nakahara H, Uchihashi T, Tsuji H, Hamada S
    • Journal Title

      J Oral Maxillofacial. Surg.

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Adenomatoid hyperplasia of salivary gland at the uvula : Case report.2011

    • Author(s)
      Nakano Y, Nakahara H, Isomura(Tanaka) E, Fukuda Y, Uchihashi T, Kogo M
    • Journal Title

      J.Osaka Univ.Dent.Soc. 55

      Pages: 111-114

    • NAID

      10028162072

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Adenomatoid hyperplasia of salivary gland at the uvula: Case report.2011

    • Author(s)
      Nakano Y, Nakahara H, et al.
    • Journal Title

      J Osaka Univ.Dent.Soc.

      Volume: 56(In press)

    • NAID

      10028162072

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] FDG-positive Warthin's tumor in a neck node mimicking metastasis in primary intraosseous left posterior mandibular cancer staging with PET/CT.2011

    • Author(s)
      Enomoto A, Nakahara H, et al.
    • Journal Title

      J Oral Maxillofacial.Surg.

      Volume: (In press)

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Osteoplastic ameloblastoma ; Acase report and Literature review.2011

    • Author(s)
      Taniguchi Y, Nakahara H, et al.
    • Journal Title

      Oral Surg.Oral Med.Oral Pathol.Oral Radiol.

      Volume: (In press)

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] RPAP3 interacts witu Reptin to regulate UV-induced phosporylation of H2AX and DNA damage.2009

    • Author(s)
      Ni L, Saeki M, Xu L, Nakahara H, Saijo M, Tanaka K, Kamisaki Y
    • Journal Title

      J Cell Biochem. 106

      Pages: 920-928

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Molecular cloning of novel Monad binding protein containing tetratricopeptide repeat domains.2008

    • Author(s)
      Itsuki Y, Saeki M, Nakahara H, Egusa H, Irie Y, Terao Y, Kawabata S, Yatani H, Kamisaki Y
    • Journal Title

      FEBS Letters 267

      Pages: 58-63

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Inhibition of Rac Induces Hyper- Activation of c-Jun N-Terminal Kinase and Caspase-Dependent Apoptosis.2008

    • Author(s)
      Matsuoka Y, Nakahara H, Nozaki S, Otani T, Kogo M
    • Journal Title

      Oral Science International 5

      Pages: 52-62

    • NAID

      10024185946

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] 線維芽細胞との混合培養下での口腔扁平上皮癌細胞の浸潤制御2008

    • Author(s)
      松岡裕大、中原寛和、久島潔、大谷朋弘、能崎晋一、平岡慎一郎、永田雅英、相川友直、山本悦秀、古郷幹彦
    • Journal Title

      日口外誌 54

      Pages: 44-49

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Presentation] 著明な骨形成を伴う線維形成型エナメル上皮腫2011

    • Author(s)
      伊東優子、中原寛和, 他
    • Organizer
      第29回日本口腔腫瘍学会総会
    • Place of Presentation
      熊本(崇城大学市民ホール)
    • Year and Date
      2011-01-27
    • Related Report
      2010 Final Research Report
  • [Presentation] reptin遺伝子による口腔癌細胞基底膜浸潤の制御2010

    • Author(s)
      徳宮元富、中原寛和, 他
    • Organizer
      第54回日本口腔科学会総会
    • Place of Presentation
      札幌
    • Year and Date
      2010-04-26
    • Related Report
      2010 Annual Research Report
  • [Presentation] 口腔乾燥症患者の乾燥症状の日内変動-口腔乾燥症患者に関する報告第一報-2010

    • Author(s)
      栗本聖之、中原寛和, 他
    • Organizer
      第55回日本口腔科学会総会
    • Place of Presentation
      千葉(幕張メッセ)
    • Related Report
      2010 Final Research Report
  • [Presentation] 顎関節転移病巣から発見にいたった悪性黒色腫の一例2010

    • Author(s)
      濱田傑、森本泰成、小倉孝文、中原寛和, 他
    • Organizer
      第64回日本口腔科学会学術集会
    • Place of Presentation
      札幌(札幌プリンスホテル)
    • Related Report
      2010 Final Research Report
  • [Presentation] 三叉神経中脳路核ニューロンにおけるナトリウム電流の発達2010

    • Author(s)
      榎本明史、田中晋、山西整、岡本怜子、辻忠孝、中原寛和, 他
    • Organizer
      第64回日本口腔科学会学術集会
    • Place of Presentation
      札幌(札幌プリンスホテル)
    • Related Report
      2010 Final Research Report
  • [Presentation] ヒト口腔扁平上皮癌の浸潤能へのreptin遺伝子の影響2010

    • Author(s)
      徳宮元富、中原寛和、松岡裕大、古郷幹彦
    • Organizer
      第64回日本口腔科学会学術集会
    • Place of Presentation
      札幌(札幌プリンスホテル)
    • Related Report
      2010 Final Research Report
  • [Presentation] オトガイ孔近傍に発生した顎骨中心性血管腫の一例2009

    • Author(s)
      栗本聖之、中原寛和, 他
    • Organizer
      第21回NPO法人日本口腔科学会近畿地方会
    • Place of Presentation
      奈良(奈良県橿原文化会館)
    • Year and Date
      2009-11-14
    • Related Report
      2010 Final Research Report
  • [Presentation] 下顎骨に発生した乳頭状角化エナメル上皮腫の一例2009

    • Author(s)
      内橋俊大、中原寛和, 他
    • Organizer
      第21回NPO法人日本口腔科学会近畿地方会
    • Place of Presentation
      奈良(奈良県橿原文化会館)
    • Year and Date
      2009-11-14
    • Related Report
      2010 Final Research Report
  • [Presentation] 同種骨髄移植後に発生した口腔腫瘍3例2009

    • Author(s)
      濱田傑、中原寛和, 他
    • Organizer
      第54回(社)日本口腔外科学会総会
    • Place of Presentation
      札幌(札幌コンベンションセンター)
    • Related Report
      2010 Final Research Report

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Published: 2008-04-01   Modified: 2016-04-21  

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