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発癌過程ならびに癌細胞形質の発現におけるプロテインホスファターゼの意義

Research Project

Project/Area Number 06281101
Research Category

Grant-in-Aid for Scientific Research on Priority Areas

Allocation TypeSingle-year Grants
Research InstitutionHokkaido University

Principal Investigator

菊地 九二三  北海道大学, 免疫科学研究所, 教授 (20006117)

Co-Investigator(Kenkyū-buntansha) 日野田 裕治  札幌医科大学, 医学部, 講師 (10165128)
菅沼 雅美  埼玉県立がんセンター, 研究所, 研究員 (20196695)
島 礼  国立がんセンター, 研究所, 室長 (10196462)
田村 眞理  東北大学, 加齢医学研究所, 教授 (20124604)
武田 誠郎  広島大学, 医学部, 教授 (40030853)
Project Period (FY) 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥16,100,000 (Direct Cost: ¥16,100,000)
Fiscal Year 1994: ¥16,100,000 (Direct Cost: ¥16,100,000)
Keywordsプロテインホスファターゼ / セリン / スレオニンホスファターゼ / チロシンホスファターゼ / 発癌 / 癌形質 / 細胞増殖 / 蛋白脱リン酸 / 遺伝子発現
Research Abstract

菊地は,肝/肝癌系でPP1,PP2A,PP2Cの癌性異変を系統的に解析し,また正常肝細胞での動態を検討した。腹水肝癌細胞では,検索した十数種の細胞株全てにおいて,例外なくPP1特にその1イソホームPP1αの特異的なmRNAおよび酵素蛋白の増量を認めた。PP2Aは大方不変,PP2Cは逆に減少していた。これに対し,肝細胞では,EGF刺激により,G1/S期に核内PP1活性が約2.5倍に特異的に上昇し,この上昇は,増殖を抑制するTGFβの存在下で完全に抑えられた。このPP1活性の上昇は,酵素蛋白の上昇を伴わず,翻訳後の修飾あるいは調節サブユニットの影響が考えられる。武田は,PP2Aの72-74kDa調節サブユニットの組織分布を調べた(未発表)。田村は,マウスのPP2Cα cDNA,およびマウスのPP2Cβの5種類のイソホーム(PP2Cβ-1,-2,-3,-4,-5)をコードするcDNAを単離し,それらの解析を行った。伊藤は,新しいホロエンザイムPP1-Mを精製し,cDNAクローニングによるアミノ酸一次構造を決定した。菅沼は,海綿(Agelas axifera)の抽出物がPP2Aのアッセイ系で約3倍に脱リン酸化を亢進することを認め,これをagelasine-Bと同定した。島は,ラット脳から新しいプロテインホスファターゼPPHのcDNAと考えられるクローン(2.1kb)を単離した。久野は,選択的スプライシングにより生じるカルシニューリン(PP2B)制御サブユニットのcDNAクローニングを行った。日野田は,新しいPTP,LC-PTPをクローニングした。矢倉は,Bリンパ球のシグナル伝達におけるチロシンホスファターゼの役割を解析した。野口は,新種のPTPase,RKPTPの全翻訳領域を含むcDNAを解析した。武内は,新規のBand4.1型チロシンホスファターゼを3分子同定することに成功した。揚河は,肺癌患者におけるサイトカインネットワークの解析を行った。

Report

(1 results)
  • 1994 Annual Research Report
  • Research Products

    (27 results)

All Other

All Publications (27 results)

  • [Publications] Kakinoki,Y.: "TGFβ1 suppresses EGF-induced increase in nuclear type 1 protein phosphatase activity at the G1/S transition of hepatocyte proliferation." FEBS Lett.352. 356-360 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Takizawa,N.: "Selective increases in isoform PP1α of type-1 protein phosphatase in ascites hepatoma cells." Jpn.J.Cancer Res.85. 274-278 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Saadat,M.: "Gene expressin of protein phosphatases in rat ascites hepatoma cell lines." Cancer Detect.Prev.18. 115-122 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Takizawa,N.: "Tissue distribution of isoform of type-1 Protein phosphatase PP1 in mouse tissues and its diabetic alterations." J.Biochem.116. 411-415 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Igarashi,H.: "B cell Ag receptor mediates different types of signals in the protein kinase activity between immature B cell mature B cell." J.Immunol.153. 2381-2393 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Matsuzawa,S.: "TGFβ1 suppresses EGF-induced increase in nuclear type 1 protein phosphatase Thyrsiferyl 23-acetate is a novel specific inhibitor of protein phosphatase PP2A." FEBS Lett.356. 272-274 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Murakami,T.: "Characterization of multiple molecular forms of Mg^<2+>-dependent protein phosphatase from Saccharomyces cerevisiae." J.Biochem.115. 762-766 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Kato,S.: "The cDNA sequence encoding mouse Mg^<2+>-dependent protein phosphatase α." Gene. 145. 311-312 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Yokoyama,N.: "Involvement of type 2C phosphatase in the dephosphorylation of 26kDa phosphoprotein in rat parotid acinar cells." Biochem.Biophys.Res.Commun.200. 467-503 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Simizu,H.: "Characterization of the myosin-binding subunit of smooth muscle myosin phosphatase." J.Biol.Chem.269. 30407-30411 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Inagaki,N.: "Spatiotemporal distribution of protein kinase and phosphatase activites." Trends.Biochem.Sci.277. 448-452 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Fujiki,H.: "Tumor necrosis factor-α、a new tumor promoter,engendered by biochemical studies of okadaic acid." J.Biochem.115. 1-5 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Nishiwaki,R.: "Two significant aspects of microcystin-LR:specific binding and liver specificity." Cancer Lett.83. 283-289 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Ohta,T.: "Nodularin,a potent inhibitor of protein phosphatases 1 and 2A,is a new environmental carcinogen in male F344 rat liver." Cancer Res.54. 4448-4453 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Chun,Y.S.: "PP1y2,a testis specific serine/threonine protein phosphatase type 1 catalytic subunits,is associated with GRP 78,a member of hsp 70 family." Proc.Natl.Acad.USA. 91. 3319-3323 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Zhang,Z.: "A mutant of protein phosphatase-1 that exhibits altered toxin sensitivity." J.Biol.Chem.269. 16997-17000 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Shima,H.: "Detection of PP2A α gene mutation in okadaic acid resistant cell line." Proc.Natl.Acad.Sci.USA. 91. 9267-9271 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Chang,C,-D.: "cDNA cloning of an altematively spliced isoform of the regulatory subunit of Ca^<2+>/calmodulin-dependent protein phosphatase(calcineurin B α 2)." Biochim.Biophys.Acta. 1217. 174-180 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Tamura,K.: "Interaction of tacrolimus(FK506) and its metabolites with FKBP and calcineurin." Biochem.Biophys.Res.Commun.202. 437-443 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Takekawa,M.: "Chromosomal localization of the protein tyrosine phosphatase G1 gene and characterzation of the aberrant transcripts in human colon cancer cells." FEBS Lett.339. 222-228 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Adachi,M.: "Induction of protein tyrosine phosphatase LC-PTP by IL-2 in human T cells." FEBS Lett.338. 47-52 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Ikuta,S.: "Expression of cytoskeletal-assosiated protein tyrosine phosphatase PTPH1 mRNA in human hepatocellular carcinoma." J.Gastroenterol. 29. 727-732 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Yakura,H.: "The role of protein tyrosine phosphatases in lymphocyte activation and differentiation." Crit.Rev.Immunol.印刷中.

    • Related Report
      1994 Annual Research Report
  • [Publications] Mizuno,K.: "Developmental regulation of gene expression for the MPTP δ isoforms in the central nervous system and the immune system." FEBS Lett.355. 223-228 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Moriyama,T.: "cDNA cloning of a cytosolic protein tyrosine phosphatase(RKPTP)from rat kidney." FEBS Lett.353. 305-308 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Takeuchi,K.: "Pertubation of cell adhesion and microvilli formation by antisense oligonucleotides to ERM family members." J.Cell.Biol.125. 1371-1384 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] Yanagawa,H.: "Serum levels of interleukin-6 in patients with lung cancer." Brit.J.Cancer. (印刷中).

    • Related Report
      1994 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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