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視蓋の誘導・位置特異性決定の分子機構

Research Project

Project/Area Number 10220201
Research Category

Grant-in-Aid for Scientific Research on Priority Areas

Allocation TypeSingle-year Grants
Review Section Biological Sciences
Research InstitutionTohoku University

Principal Investigator

仲村 春和  東北大学, 大学院・生命科学研究科, 教授 (90079690)

Co-Investigator(Kenkyū-buntansha) 佐藤 達也  東北大学, 大学院・生命科学研究科, 日本学術振興会特別研究員
渡邉 裕二  東北大学, 大学院・生命科学研究科, 助手 (80301042)
舟橋 淳一  東北大学, 加齢医学研究所, 助教授 (00270827)
荒木 功人  東北大学, 加齢医学研究所, 助手 (90281998)
Project Period (FY) 1998 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥86,500,000 (Direct Cost: ¥86,500,000)
Fiscal Year 2003: ¥13,500,000 (Direct Cost: ¥13,500,000)
Fiscal Year 2002: ¥13,500,000 (Direct Cost: ¥13,500,000)
Fiscal Year 2001: ¥16,000,000 (Direct Cost: ¥16,000,000)
Fiscal Year 2000: ¥16,000,000 (Direct Cost: ¥16,000,000)
Fiscal Year 1999: ¥13,500,000 (Direct Cost: ¥13,500,000)
Fiscal Year 1998: ¥14,000,000 (Direct Cost: ¥14,000,000)
Keywords視蓋 / ニワトリ胚 / エレクトロポレーション / En2 / cHes5 / siRNA / 遺伝子発現阻害 / chimerin / オーガナイザー / Fgf8 / Lmx1b / Wnt1 / Grg4 / 網膜視蓋投射 / 中脳視蓋 / 領域 / Pax2 / 5 / En / Otx2 / Gbx2 / Egf8 / in ovo エレクトロポレーション / Pax 2 / 誘導 / pcx-s / Otx・2
Research Abstract

1.これまで、ニワトリ胚での遺伝子発現阻害実験は困難であったが、標的遺伝子とマッチする21ベースのヘアピン型RNA発現ベクターをエレクトロポレーションにより導入することによって可能となった。現在、この方法を用いて視蓋の領域形成のさらなる解析を行っている。
2.中脳胞領域でEnによりその発現が抑制される遺伝子のスクリーニングの過程でcHes5が単離された。,cHes5は中脳胞前側で強く発現しており、En2の発現の強い峡部ではその発現が見られない。実際En2によりcHes5の発現は抑制された。またEn2に対するsiRNAを導入し、En2の発現を抑制すると、峡部でcHes5の発現が誘導されたことから、cHes5は視蓋の極性形成に関与している可能性が示唆された。
3.同じくEnにより発現が抑制される遺伝子としてb2-chimerinが単離された。これも中脳胞領域で興味深い発現をしているので現在機能解析を続けている。
4.ゼブラフィシュでislet3によりその発現が制御され、峡部オーガナイザー活性と関係のある分子としてcanopyファミリーが同定された。ニワトリ胚のCanopy遺伝子の単離を試み、canopy2が得られた。Canpy2は中脳胞前域をカバーするように発現していることから、エレクトロポレーションにより現在その解析を進めている。
6年間の研究期間を通じて、中脳、後脳の領域形成のメカニズムの理解が深まったが、3,4のようにこれからの課題もできたのでさらに研究を展開していく心づもりである。

Report

(6 results)
  • 2003 Annual Research Report
  • 2002 Annual Research Report
  • 2001 Annual Research Report
  • 2000 Annual Research Report
  • 1999 Annual Research Report
  • 1998 Annual Research Report
  • Research Products

    (38 results)

All Other

All Publications (38 results)

  • [Publications] Katahira, T., Nakamura, H.: "Gene silencing in chick embryos with vector-based small interfering RNA system."Develop.Growth Differ.. 45・3. 361-367 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Watanabe, Y., Toyoda, R., Nakamura, H.: "Navigation of Trochlear axons along the midbrain-hindbrain boundary to neuropilin-2"Development. 131・3. 681-692 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Nakamura, H., Sugiyama, S.: "Polarity and laminar formation of the optic tectum in relation to retinal projection."J.Neurobiol.. 59・1. 48-56 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Kimura, J., Katahira, T., Araki, I., Nakamura, H.: "Possible role of Hes5 for the rostrocaudal polarity formation of the tectum"Dev.Growth Differ.. 46・3(in press). (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Nakamura., H., Watanabe, Y.: "Isthmus organizer and regionalization of the mesencephalon and metencephalon."Int.J.Dev.Biol.. (in press). (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Nakamura, H., Katahira, T., Watanabe, Y., Funahashi, J.: "Gain and loss of function in chick embryos by electroporation"Mech.Dev.. (in press). (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] 仲村春和, (伊藤正男監修, 金澤一郎, 篠田義一, 広川信隆, 御子柴克彦, 宮下保司編): "脳神経科学"三輪書店. 841 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Sugiyama, S., Nakamura, H.: "The role of Grg4 in tectal laminar formation"Development. 130. 451-462 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] Matsunaga, E., Katahira, T., Nakamura, H.: "Role of Lmx1b and Wnt1 in mesencephalon and metencephalon development"Development. 129. 5269-5277 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Kishimoto, K.N., Watanabe, Y., Nakamura, H., Kokubun, S.: "Ectopic bone formation by electroporatic transfer of bone morphogenetic protein-4 gene"Bone Aug.. 31・2. 340-347 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 松永英治, 仲村春和: "視蓋領域形成におけるPax6とPax3/7の役割"実験医学増刊. 20・5. 34-40 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 仲村春和: "中枢神経系の領域はどのようにして形成されるか"実験医学増刊. 20・5. 12-20 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 佐藤達也, 仲村春和: "視蓋/小脳の分化とFGFシグナル"実験医学増刊. 20・2. 213-220 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Sato, T., Araki, I., Nakamura, H.: "Inductive signal and tissue responsiveness to define the tectum and the cerebellum"Development. 128. 2461-2469 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Matsunaga, E., Araki, I., Nakamura, H: "Role of Pax3/7 in the tectum regionalization"Development. 128. 4069-4077 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Ye, W., Bouchard, M., Stone, D., Liu, X., Vella, F., Lee, J., Nakamura, H., Ang.SL, Busslinger, M., Rosenthal, A.: "Distinct regulators control the expression of the midhindbrain organizer signal FGF8"Nat Neurosci.. 4. 1175-1181 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Nakamura, H.: "Regionalisation of the optic tectum : Combination of the gene expression that defines the tectum"Trends Neurosci. 24. 32-39 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Nakamura, H., Funahashi, J.: "Introduction of DNA into chick embryos by in ovo elecroporation"Methods.. 24. 43-48 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Nakamura, H.: "Regionalisation and polarity formation of the optic tectum"Prog. Neurobiol.. 65. 473-488 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Sugiyama,S.,Funahashi,J.and Nakamura,H.: "Antagonizing activity of chick Grg4 against tectum-organizing activity."Dev.Biol.. 221. 168-180 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Matsunaga,E.,Araki,I.and Nakamura,H.: "Pax6 defines the di-mesencephalic boundary by repressing Enl and Pax2"Development. 127. 2357-2365 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Fujii,T.,Funahashi,J.,Matsuura,R..,Izaki T.,Nakamura,H.,Mikawa,T.and Tanaka,H.: "Axonal growth of the spinal cord interneurons expressing a homophilic adhesion molecule SCI ectopically."Neurosci.Res.. 38. 175-81 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Nakamura,H.: "Regionalisation of the optic tectum : Combination of the gene expression that defines the tectum."Trends Neurosci.. 24. 32-39 (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] Nakamura,H.: "Regionalisation and polarity formation of the optic tectum."Prog.Neurobiol.. (in press). (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] Nakamura,H and Funahashi,J.: "Introduction of DNA into Chick Embryos by in Ovo Electroporation."Methods.Enzymol.. (in press). (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] T.Okafuji,J.Funahashi,H.Nakamura: "Roles of Pax-2 in inflation of the chick tectal development"Dev.Brain Res.. 116. 41-49 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] I.Araki,H.Nakamura: "Engrailed defines the position of dorsal di-mosencephalic boundary by repressing diencephalic fate"Development. 126. 5127-5135 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] T.Katahira,T.Sato,S.Sujiyama,T.Okafuji,I.Araki,J.Funabashi,H.Nakamura: "Interaction between Otx2 and Gbx2 defines the organizing center for the optic tectum"Mech.Dev.. (in press). (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] Y.Watanabe,H.Nakamura: "Control of chick tectum territory along dorsoventral axis by sonic hedgehog"Development. 127. 1131-1140 (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] K.Koshiba-Takeuchi,J.K.Takeuchi,K.Matsumoto,T.,Momose,K.Uno,V.Hoepker,K.Ogura,N.Takahashi,H.Nakamura,K.Yasuda T.Ogura: "Tbx5 and the retinotectam projection"Science. 287. 134-137 (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] S.sugiyama,J.Funahashi,H.Nakamura: "Antagonizing activity of chick Gry4 against tectum-organizing activity"Dev.Biol.. 91. 43-52 (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] 仲村春和(生塩之敬、山浦晶編): "神経堤由来組織の腫瘍性病変"三輪書店. 136 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] S.Sugiyama,J.Funakoshi,J.Kishiwaki,H.Nakamura: "Cross regulation between En-2 and Wnt-1 in the chick tectol development" Level.Growth Differ.40. 157-166 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] J.Funakoshi,T.Okafuji,H.Ohuchi,S.Noji,H.Tanaka H.Nakamura: "Role of Pcx-5 in the regulation of a mid-hindbreln orgonizer's activity" Level.Growth.Differ. 41(11. 59-72 (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] K.Sakamoto,H.Nakamura,M.Takagi,S.Takeda,K.Katsube: "Ectopic Expression of lunatic fringe leads to down-regulation of Serrate-1 in the developing chick neural-tube-analysis using in ovo electroporation transfection Technigue" FEBS Let.426. 337-341 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] M.Tanaka,Y.Shigetani,S.Sugiyama,K.Tamura,H.Nakamura,H.Ide: "Apical ectodermel ridge induction by transplantation of En-1 overexpressing ectoderm in chick limbbnd" Level.Gowth.Differ. 40. 423-429 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 仲村春和(石川春律他編): "標準細部生物学" 医学書院, 361 (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] Larsen(仲村春和他訳): "ラーセン「最新人体発生学」第2版" 西村書店, 504 (1999)

    • Related Report
      1998 Annual Research Report

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Published: 1998-04-01   Modified: 2018-03-28  

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