• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

14-3-3σによる上皮細胞の最終分化、G2/M期調節機構の解明

Research Project

Project/Area Number 13780510
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field Functional biochemistry
Research InstitutionShowa University

Principal Investigator

大場 基  昭和大学, 腫瘍分子生物学研究所, 助手 (70297018)

Project Period (FY) 2001 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 2002: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 2001: ¥900,000 (Direct Cost: ¥900,000)
KeywordsPKC / 14-3-3 / 老化 / 細胞周期 / ケラチノサイト / CDK / アポトーシス
Research Abstract

重層扁平上皮を構成する主要な細胞ケラチノサイトを用いて、上皮特異的プロテインキナーゼC : PKCηとその結合蛋白質14-3-3σの増殖阻害、老化誘導作用機構の解明を進めた。
PKCηは、CbK2/CyclinE/p21と相互作用し、G1期停止を誘導する。
1)PKCη/CDK2/CyclinE複合体のアダプター蛋白質として、14-3-3ζ及び14-3-3σを同定した。
2)14-3-3ζがPKCα,PKCδ,PKCζとも相互作用するのに対して、14-3-3σはPKCη特異的に結合した。またその結合部位は、PKCηC末端領域であった。
3)14-3-3σとPKcηCDK2/CyclinEとの結合は、試験管内で再構成された。
4)14-3-3σはPKCηと同様、表皮有棘層、顆粒層に限局して発現する。細胞内ではPKCηと同様、核周辺部に存在した。しかし、ケラチノサイトの分化に伴い、14-3-3σは核移行した。局在変化は、14-3-3のリン酸化レベルに依存していることが示された。
5)14-3-3σの核移行に伴い、細胞は老化様形態を示し、老化マーカー:senescence assooiated β-galactosidase活性(SA-β-gal)が誘導された。
また上記以外の研究成果として、PKCηが紫外線誘導性アポトーシスの誘導を抑制することを見いだした。

Report

(2 results)
  • 2002 Annual Research Report
  • 2001 Annual Research Report
  • Research Products

    (11 results)

All Other

All Publications (11 results)

  • [Publications] Ohba, M.: "Induction of differentiation in normal human keratinocytes by adenovirus-mediated introduction of the eta and delta isoforms of protein kinase C"Mol.Cell.Biol.. 18. 5199-5207 (1998)

    • Related Report
      2002 Annual Research Report
  • [Publications] Kuroki, T.: "Adenovirus-mediated gene transfer to keratinocytes. -A Review-"J.Invest.Dermatol.Symp.Proc.. 4. 153-157 (1999)

    • Related Report
      2002 Annual Research Report
  • [Publications] Alt, A.: "Protein kinase Cσ mediated phosphorylation of α6β4 is associated with reduced integrin localization to the hemidesmosome and decreased keratinocyte attachment"Cancer Res.. 61. 4591-4598 (2001)

    • Related Report
      2002 Annual Research Report
  • [Publications] Efimova, T.: "Novel PKC isoforms regulate human keratinocyte differentiation activating a p38d MAPK cascade that targets C/EBPα."J.Biol.Chem. 277. 31753-31760 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Matsumura, M.: "The η isoform of protein kinase C inhibits UV-induced activation of caspase-3 in normal human keratinocytes"Biochem.Biophys.Res.Commun.. (In press). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] Ohba, M., et. al: "Induction of differentiation in normal human keratinocytes by adenovirus mediated introduction of the η and δ isoforms of protein kinase C"Mol. Cell. Biol.. 18. 5199-5207 (1998)

    • Related Report
      2001 Annual Research Report
  • [Publications] Kashiwagi, M. et. al: "PKCη associates with cyclin E/cdk2/p21 complex, phosphorylates p21 and inhibits cdk2 kinase in keratinocytes"Oncogene. 19. 6334-6341 (2000)

    • Related Report
      2001 Annual Research Report
  • [Publications] Shlomzion Shen, S. et. al: "PKCδ activation : a divergence point in the signaling of insulin and IGF-1 induced proliferation of skin keratinocytes"Diabetes. 50. 255-264 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Alt, A. et. al: "Protein kinase Cδ mediated phosphorylation of α6β4 is associated with reduced integrin localization to the hemidesmosome and decreased keratinocyte attachment"Cancer Res.. 61. 4591-4598 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Braiman, L. et. al: "Activation of protein kinase Cζ induces serine phosphorylation of vamp2 in the glut4 compartment and increases glucose transport in skeletal muscle"Mol. Cell. Biol.. 21. 7852-7861 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Garcia-Bermejo, M. L. et.al: "DAG-lactones, a new class of PKC agonists, induce apoptosis in LNCaP prostate cancer cells by selective activation of PKC"J. Biol. Chem.. 277. 645-655 (2002)

    • Related Report
      2001 Annual Research Report

URL: 

Published: 2001-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi