Updated on 2025/09/30

写真a

 
YANAGIDA YASUKO
 
Organization
Institute of Integrated Research Laboratory for Future Interdisciplinary Research of Science and Technology Professor
Title
Professor
External link

Degree

  • 博士(工学) ( 東京工業大学 )

Research Areas

  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Biofunction and bioprocess engineering

  • Nanotechnology/Materials / Nano/micro-systems

Research History

  • Tokyo Institute of Technology   Institute of Innovative Research   Professor

    2017.9

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  • Tokyo Institute of Technology   Precision and Intelligence Laboratory

    2003.4 - 2007.3

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  • Tokyo Institute of Technology   Graduate School of Bioscience and Biotechnology, Department of Biological Information   Lecturer

    2002.3 - 2003.3

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  • Tokyo Institute of Technology   Graduate School of Bioscience and Biotechnology, Department of Biological Information

    1999.4 - 2002.2

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  • Tokyo Institute of Technology   School of Bioscience and Biotechnology

    1996.1 - 1999.3

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Papers

  • Formation Mechanism Analysis of Shear‐Induced Microgel Filaments during Microfluidic Gelation Reviewed

    Shuhei Fukushima, Yuriko Takayama, Eri Nasuno, Yasuko Yanagida, Norihiro Kato

    Macromolecular Materials and Engineering   2000586 - 2000586   2020.12

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    Publishing type:Research paper (scientific journal)   Publisher:Wiley  

    DOI: 10.1002/mame.202000586

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    Other Link: https://onlinelibrary.wiley.com/doi/full-xml/10.1002/mame.202000586

  • Localized pours silicon sructure by patterned illumination using shadowmasks Reviewed

    Jongho Park, Beomjoon Kim, Yasuko YANAGIDA, TAKESHI HATSUZAWA

    p. 132   2018.11

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  • ナノインプリント法を用いた温度応答性フォトニック結晶の作製 Reviewed

    櫻井 友紀也, 朴 鍾淏, 初澤 毅, 栁田 保子

    第65回応用物理学会春季学術講演会誌   2018.3

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  • 薬物の高容量搭載を目的とした新しいマイクロニードルアレイ製作法の提案 Reviewed

    朴 鍾淏, 金 正東, 鄭 道鉉, 栁田 保子, 初澤 毅

    2018.3

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  • Quantitative analysis of cell adhesion under shear stress using microfluidic devices

    Koji Fujimoto, Yasuhiro Okawa, Yoshiomi Hiroi, Junko Katayama, Takashi Funakoshi, Yasuko Yanagida, Takayuki Ohba

    22nd International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2018   4   2472 - 2473   2018

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    Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:Chemical and Biological Microsystems Society  

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  • Localized porous silicon structure by patterned illumination using shadow masks Reviewed

    Jongho Park, Beomjoon Kim, Yasuko Yanagida, Takeshi Hatsuzawa

    2017.11

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  • Cell adhesion on gel filaments fabricated by co-flow microfluidic device Reviewed

    Yuriko Takayama, Yasuko Yanagida, Norihiro kato

    2017.11

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  • Aspherical Lens Design Using Computational Lithography Reviewed

    Seiro Murakami, Yasuko Yanagida, Takeshi Hatsuzawa

    PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY   50   372 - 379   2017.10

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.precisioneng.2017.06.011

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  • A Silicon Bioreactor with Three-Dimensional Flow-Focusing Structure to Generate Platelets Reviewed

    Koji Fujimoto, Yasuhiro Okawa, Yoshiomi Hiroi, Junko Katayama, Takashi Funakoshi, Yasuko Yanagida, Takayuki Ohba

    2017.10

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  • 裏面露光による電極アレー構造の製作(第2報)熱処理による金薄膜の密着性向上 Reviewed

    黒坂幹哉, 朴鍾淏, 栁田保子, 初澤毅

    2017.9

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  • ヒドロゲルファイバー表面形状形成のためのマイクロノズル作製 Reviewed

    陳 政霖, 松谷 晃宏, 西岡 國生, 朴 鍾淏, 初澤 毅, 栁田 保子

    第78回応用物理学会秋季学術講演会集   2017.9

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  • 温度応答性高分子を用いたフォトニック結晶の作製 Reviewed

    櫻井友紀也, 朴鍾淏, 初澤毅, 栁田保子

    2017.9

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  • Fabrication of Bundled Gel Fibres and Their Application for Cell Adhesion Reviewed

    Yuriko Takayama, Yasuko Yanagida, Norihiro Kato

    2017.8

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  • Microorganisms driven micro actuation mechanisms for the kinetic energy harvesting Reviewed

    Takeshi Hatsuzawa, Yasuko Yanagida, Takasi Nisisako

    TRANSDUCERS 2017 - 19th International Conference on Solid-State Sensors, Actuators and Microsystems   2067 - 2070   2017.7

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    Language:English   Publishing type:Research paper (international conference proceedings)   Publisher:Institute of Electrical and Electronics Engineers Inc.  

    DOI: 10.1109/TRANSDUCERS.2017.7994480

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  • Micro-rotary rachets driven by migratory phytoplankton with phototactic stimulus Reviewed

    Takeshi Hatsuzawa, Daishin Ito, Takasi Nisisako, Yasuko Yanagida

    Precision Engineering   vol. 48   pp. 107 - 113   2017.1

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  • Development of a cartridge-type cell culture device combined with poly(n-isopropylacrylamide) coated substrates Reviewed

    Yumiko Kinoshita, Jongho Park, Yasuko Yanagida, Takeshi Hatsuzawa

    IEEJ Transactions on Sensors and Micromachines   137 ( 3 )   78 - 83   2017

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Institute of Electrical Engineers of Japan  

    DOI: 10.1541/ieejsmas.137.78

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  • MEMS/NEMS-based Devices for Bio-measurements

    YANAGIDA Yasuko

    Electrochemistry   85 ( 9 )   572 - 579   2017

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    Language:English   Publisher:The Electrochemical Society of Japan  

    Recently, the development of fabrication technology has simplified the construction of micro/nano electrical-mechanical systems (MEMS/NEMS). For example, bottom-up techniques allowing the deposition of atoms and molecules to fabricate nanostructures have been studied. Molecular self-assembly using biomolecules has become an important process for the fabrication of nanostructures through bottom-up techniques. Of the various biomolecules, DNA has several advantages such as ease of synthesis, and well-developed cut-and-paste techniques that are suitable for nanostructure fabrication. Also, analytical methods that enable detection of the activity of living cells and biomolecules are critical for biomedical sensing applications because these substrates are the basis of life. MEMS/NEMS technologies enable the micro/nanometer-scale construction of many types of devices and thus hold great potential for biotechnology and biomedical sensing applications. Consequently, numerous studies have been performed using cell-based micro-devices based on MEMS/NEMS technologies. BioMEMS/NEMS devices will become powerful tools for the measurement of biological and biomedical functions.

    DOI: 10.5796/electrochemistry.85.572

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  • Fabrication of p-type porous silicon using double tank electrochemical cell with halogen and LED light sources Reviewed

    Jongho Park, Yasuko Yanagida, Takeshi Hatsuzawa

    SENSORS AND ACTUATORS B-CHEMICAL   233   136 - 143   2016.10

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.snb.2016.04.058

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  • Separation of viable and nonviable mammalian cells using a deterministic lateral displacement microfluidic device Reviewed

    Naotomo Tottori, Takasi Nisisako, Jongho Park, Yasuko Yanagida, Takeshi Hatsuzawa

    BIOMICROFLUIDICS   10 ( 1 )   2016.1

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1063/1.4942948

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  • A Deterministic Lateral Displacement Microfluidic Device for Continuous Separation of Satellite Droplets

    Tottori Naotomo, Nisisako Takashi, Yanagida Yasuko, Hatsuzawa Takeshi

    Proceedings of JSPE Semestrial Meeting   2016   327 - 328   2016

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    Language:Japanese   Publisher:The Japan Society for Precision Engineering  

    DOI: 10.11522/pscjspe.2016S.0_327

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  • Thermally tunable deterministic lateral displacement through hydrogel micro pillar arrays

    N. Tottori, Y. Sakurai, T. Nisisako, Y. Yanagida, T. Hatsuzawa

    20th International Conference on Miniaturized Systems for Chemistry and Life Sciences, MicroTAS 2016   140 - 141   2016

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  • Design and evaluation of Artemia-driven micro ratchet gears Reviewed

    Takeshi Hatsuzawa, Atsushi Yamazaki, Takashi Nisisako, Yasuko Yanagida

    SENSORS AND ACTUATORS A-PHYSICAL   235   182 - 186   2015.11

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.sna.2015.10.011

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  • DLDを用いた生死細胞分離デバイス

    鳥取 直友, 朴 ちょんほ, 柳田 保子, 初澤 毅

    精密工学会学術講演会講演論文集   2015   791 - 792   2015

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    近年,死細胞が生細胞に悪影響を与えることから,誘電泳動や音響泳動を用いた生死細胞分離のためのマイクロ流体デバイスの研究が行われている.しかし,誘電泳動では生細胞への電気的な影響が懸念され,音響泳動では増幅器など大型の装置が必要という課題がある.そこで,本研究では細胞死の経路の一つであるアポトーシスにて生じる細胞収縮に着目し,粒子径の違いに基づき分離可能なDeterministic Lateral Displacement(DLD)による生死細胞分離を行った.

    DOI: 10.11522/pscjspe.2015A.0_791

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  • エピジェネティクス解析のためのマイクロナノ流体デバイス(第2報)

    竹山 輝, 朴 ちょんほ, 柳田 保子, 初澤 毅

    精密工学会学術講演会講演論文集   2015   787 - 788   2015

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    Language:Japanese   Publisher:公益社団法人 精密工学会  

    本研究はDNA鎖のメチル化部位を特定する、エピジェネティクス解析に応用可能な流体デバイスの開発を目的としている。高感度なメチル化部位の特定には一分子DNAの伸長化が重要である。本報ではDNAの電気泳動を用いてDNAをナノ流路に導入することで、一分子DNAの可視化に成功した。また、DNA片末端へのマイクロビーズの固定化を行った.DNA片末端をナノ流路入口に固定することで,流路内の流れを用いた一分子DNAの伸長化について検討した。

    DOI: 10.11522/pscjspe.2015A.0_787

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  • 植物プランクトンによる歯車駆動

    伊藤 大心, 柳田 保子, 西迫 貴志, 初澤 毅

    精密工学会学術講演会講演論文集   2015   787 - 788   2015

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    現在,非枯渇性資源としてバイオ燃料など微生物を利用したエネルギーが注目されている.本研究では,光合成によりエネルギーを生産できるボルボックスやユードリナなどの植物プランクトンのランダムな運動エネルギーを,フォトリソグラフィにより作製した微小な歯車の回転エネルギーに変換するメカニズムを提案した.また,植物プランクトンの走光性により,運動方向が変化する性質を利用して歯車の回転制御を試みた.

    DOI: 10.11522/pscjspe.2015S.0_787

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  • エピジェネティクス解析のためのマイクロナノ流体デバイス(第1報)

    竹山 輝, 朴 ちょんほ, 柳田 保子, 初澤 毅

    精密工学会学術講演会講演論文集   2015   775 - 776   2015

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    近年,DNAのメチル化異常が発がんの一つの原因となることが明らかとされている.がんの診断や予防のため,DNAのメチル化のシステムであるエピジェネティクス解析が盛んに行われている.本研究では,エピジェネティクス解析のための電気浸透流を用いる流体デバイスを提案する.エッチングを用いた従来のプロセスと異なり,シリコン基板上のレジストモールドを利用し,マイクロナノ複合構造を有するPDMSデバイスの製作,評価を行った.

    DOI: 10.11522/pscjspe.2015S.0_775

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  • プランクトン駆動型回転アクチュエータ 第一報 光刺激による回転実現

    山崎 敦史, 柳田 保子, 西迫 貴志, 初澤 毅

    精密工学会学術講演会講演論文集   2015   789 - 790   2015

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    プランクトンや微生物の刺激応答性を利用したアクチュエータ開発が注目されている.本研究では,アルテミア幼生が光に集まる習性を利用し,樹脂性の微小歯車を回転させ,光の照射により歯車の回転制御が可能な駆動系を構成した.直系5mm厚さ1mmの微小歯車を作製し,これに光刺激用のシェードを設置した.約50匹のアルテミア幼生を入れたシャーレ水面に歯車を設置後,上部から照射した光のON/OFFにより回転運動と停止の実験系を構成した.

    DOI: 10.11522/pscjspe.2015S.0_789

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  • シリコンの異方性エッチングを用いた細胞破砕デバイスの作製

    宮川 雄太, 柳田 保子, 初澤 毅

    精密工学会学術講演会講演論文集   2015   797 - 798   2015

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    現在,DNA等の細胞内容物の分析のために,細胞の破砕および,内容物の抽出が行われている.細胞破砕手段として,物理的,化学的,電気的手法が存在するが,大型装置の必要性や破砕時の細胞変質といった問題点が存在する.本研究ではその中で細胞変質が小さいとされる物理的手法に着目し,流路の狭隘部による破砕を行うため,シリコンの異方性ウェットエッチングにより流路形状の整ったデバイスを作製した.

    DOI: 10.11522/pscjspe.2015A.0_797

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  • プランクトン駆動型回転アクチュエータ 第二報 光刺激による回転制御

    山崎 敦史, 西迫 貴志, 柳田 保子, 初澤 毅

    精密工学会学術講演会講演論文集   2015   801 - 802   2015

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    海洋性プランクトンの一種であるアルテミア幼生が光に集まる習性を利用し,樹脂製の小型歯車(直径5mm厚さ1mm)を回転させて,光の照射により歯車の回転制御が可能なプランクトン駆動型回転アクチュデータを構成した.本報では歯車の停止制御の手法を提案するとともに,流体シミュレーションによる歯車回転抵抗から,駆動力の推定を試みた.測定データとシミュレーション値の相関を見ることで最適な駆動系の提案を行う.

    DOI: 10.11522/pscjspe.2015A.0_801

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  • 決定論的横置換法を用いた粒子分離デバイスの開発

    鳥取 直友, 朴 ちょんほ, 柳田 保子, 初澤 毅

    精密工学会学術講演会講演論文集   2015   743 - 744   2015

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    近年マイクロ流体デバイスを用いた粒子分離技術が注目を集めている。既存の技術と比較して分離デバイスの小型化、分離の迅速化、低コスト化などの利点がある。本研究では、流路内にマイクロサイズの構造物を規則的に配列させることによって生じる連続的な流れの方向の違いを利用する決定論的横置換法を用い、粒子分離デバイスの設計、シミュレーション、作製デバイスによる粒子分離効率の検討を行った。

    DOI: 10.11522/pscjspe.2015S.0_743

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  • 温度応答性高分子を用いたキネシン・微小管系の往復運動デバイスの作製

    楠田 周, 朴 ちょんほ, 柳田 保子, 初澤 毅

    精密工学会学術講演会講演論文集   2015   813 - 814   2015

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    Language:Japanese   Publisher:公益社団法人 精密工学会  

    近年,化学エネルギーを運動エネルギーに変換するキネシン・微小管系の運動能を応用したデバイスが提案されている.これらの多くは一方向性の不可逆的な運動を主としている.本研究では,Si基板上に微細構造と局所加熱用の電熱線を作製した.その上に温度応答性高分子を塗布し基板の表面特性を局所的に変化させ,キネシンと微小管の結合状態を制御することで,キネシンによって駆動する微小管を往復運動させるデバイスを作製する.

    DOI: 10.11522/pscjspe.2015A.0_813

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  • Bio-device Fabrication by Precision Engineering

    HATSUZAWA Takeshi, YANAGIDA Yasuko

    Journal of the Japan Society for Precision Engineering   80 ( 4 )   365 - 368   2014

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    Language:Japanese   Publisher:The Japan Society for Precision Engineering  

    DOI: 10.2493/jjspe.80.365

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    Other Link: https://jlc.jst.go.jp/DN/JALC/10032834580?from=CiNii

  • 微生物によるマイクロ回転モータ(第1報)

    中村 太一, 柳田 保子, 初澤 毅

    精密工学会学術講演会講演論文集   2013   907 - 908   2013

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    Language:Japanese   Publisher:公益社団法人 精密工学会  

    現在,微生物から取り出せるエネルギーはバイオ燃料や葉緑体発電などによる化学・電気的エネルギーに留まっている.本研究では,微生物の運動エネルギーを利用した電源不要の新たなアクチュエータとして,ミドリムシ(~50μm)が光に集まる習性を利用して微小歯車を回転させ機械的エネルギーを取り出し,光で歯車の回転制御可能な駆動装置を提案する.直径1mm厚さ50μmの微小歯車を作製し,107cells/mLのミドリムシにて歯車回転を試みた.

    DOI: 10.11522/pscjspe.2013A.0.907.0

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  • 温度応答性高分子を用いたデバイスによる細胞継代培養法

    木下 裕美子, 柳田 保子, 初澤 毅, 朴 チョンホ

    精密工学会学術講演会講演論文集   2013   897 - 898   2013

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    Language:Japanese   Publisher:公益社団法人 精密工学会  

    細胞を扱う研究では,細胞培養の際に,空間や栄養の面から,増殖した細胞を定期的に間引きする必要がある.本研究では,薬品処理による強制的な剥離を行わずに細胞を間引きする手法を提案し,培養デバイスを作製した.培養基板に塗布した高分子の温度応答により細胞接着面の親水度が変化するため,細胞が自発的に基板から剥離する.細胞膜の損傷が抑えられ,実験操作も簡便になるため,細胞,実験者ともに有益であると考えられる.

    DOI: 10.11522/pscjspe.2013A.0.897.0

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  • 遠心力を用いた単一細胞破砕デバイス(第2報)

    小谷 祐喜, 西迫 貴志, 柳田 保子, 初澤 毅

    精密工学会学術講演会講演論文集   2013   895 - 896   2013

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    本研究では単一細胞を対象とし,細胞変質の少ない破砕・内容物抽出が可能なバイオチップの開発を目的としている.第一報においてはマイクロ流路をもつデバイスにおいて遠心力による複数細胞の破砕を実現した.本報ではデバイスに細胞を単一に配置・破砕する構造を加え,サイフォンを応用し,一定水位の維持,試薬の入れ替えが可能となるよう改良した.試作デバイスにおいて植物細胞の配置及び破砕を試みた.

    DOI: 10.11522/pscjspe.2013A.0.895.0

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  • 個別配置機能を有する細胞培養チップの作製(第2報)

    雨宮 航, 朴 チョンホ, 柳田 保子, 初澤 毅

    精密工学会学術講演会講演論文集   2013   887 - 888   2013

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    本研究では、負の誘電泳動を用いた細胞の個別配置および同一基板上での細胞培養が可能なチップの開発を目的としている。前報では提案したチップにより細胞を個別に配置し、細胞の滴下数による細胞配置率の測定を行ったが、チップ作製の再現性に課題が残った。そこで本報では、マイクロチャンバをKMPRフォトレジストを用いて作製し、電極をエッチング法により作製する事で再現性を向上させるとともに、長期使用の可能性を示す。

    DOI: 10.11522/pscjspe.2013A.0.887.0

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  • メニスカスを利用したDNAナノワイヤ整列装置 第2報

    畑山 純平, 柳田 保子, 初澤 毅

    精密工学会学術講演会講演論文集   2013   881 - 882   2013

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    ナノテクノロジーを応用した加工手法の1つとして,DNAを鋳型とした電子配線であるDNAナノワイヤを構築する研究が近年盛んに行われている.本研究では,DNAナノワイヤの実用化に向け,第1報のメニスカスを応用した手法に加え,電気泳動を組み合わせた電極間へのDNA架橋手法を提案する.片末端をチオール基で修飾したλ-DNAと,Si基板上に作製したAu電極を用いてDNAの電極間架橋を行い,蛍光観察により電極間へのDNA架橋を実験的に確認した.

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  • ポーラスシリコンを用いたタンパク質検出デバイス

    舟木 勇矢, 朴 チョンホ, 柳田 保子, 初澤 毅

    精密工学会学術講演会講演論文集   2013   905 - 906   2013

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    シリコン基板をHF溶液中で陽極酸化することによって,多孔質化されたポーラスシリコン(PSi)を得ることができる.PSiは,その表面の反応特性や発光特性など多機能で,コンパクトに作製できることからバイオセンサなどのバイオデバイスへの応用が期待されている.本研究では,タンパク質を電気的に検出することへの利用を考え,PSiを用いてImmunoglobulin G (IgG)の測定を可能にするためのPSiデバイスを提案し,PSiの作製条件を検討した.

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  • Nanowire Fabrication by DNA Metallization and Positioning Reviewed

    Hongwei Guan, Sichen Liu, Yasuko Yanagida, Takeshi Hatsuzawa

    EMERGING TECHNOLOGY IN PRECISION ENGINEERING XIV   523-524   604 - +   2012

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    DOI: 10.4028/www.scientific.net/KEM.523-524.604

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  • Fabrication of Anchor and DNA for Nanowire Bridging

    Kann Koui, Yanagida Yasuko, Hatsuzawa Takeshi

    Proceedings of JSPE Semestrial Meeting   2012   857 - 858   2012

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    In this research, we propose a new method to apply DNA for the formation of nano-wires. Nano-oxidation experiments were conducted on a silicon substrate by atomic force microscopy (AFM) to produce nano-dots as anchors for DNA fixing. After the substrate was treated with a solution containing 2 μm DNAs modified with thiol at the both ends, which can chemically connect with the dots, the anchors were bridged by the DNAs. The DNA nanowires were observed by AFM.

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  • Design and fabrication of Deterministic Lateral Displacement device for separation of blood cells

    Tsukahara Seiya, Hatsuzawa Takeshi, Yanagida Yasuko

    Proceedings of JSPE Semestrial Meeting   2012   861 - 862   2012

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    The separation of blood cells is an important process in diagnosis, and is classified typically by centrifugation. Recently, needs for miniaturization, low cost of the diagnostic devices and fast separation are highly demanded. In this study, we utilize a laminar flow generated by an array of posts in a micro channel, which is analyzed by a simulation. After that, we experimentally investigate the behavior of the device and flow in the micro channel.

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  • Study of electrical field distribution of gold-capped nanoparticle for excitation of localized surface plasmon resonance Reviewed

    Endo, Tatsuro, Takizawa, Hikaru, Imai, Yasunori, Yanagida, Yasuko, Hatsuzawa, Takeshi

    APPLIED SURFACE SCIENCE   257 ( 7 )   2560 - 2566   2011.1

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    DOI: 10.1016/j.apsusc.2010.10.022

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  • Alignment and plating of DNA nanowire

    Sichen Liu, Yanagida Yasuko, Hatsuzawa Takeshi

    Proceedings of JSPE Semestrial Meeting   2011   375 - 376   2011

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    DOI: 10.11522/pscjspe.2011A.0.375.0

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  • Label-Free Detection of Oligosaccharide-Lectin Interaction Using Plasmonic Optical Device for Glycomics Application Reviewed

    Endo, Tatsuro, Matsuda, Sayoko, Obara, Takakiyo, Chuma, Yasushi, Ogata, Makoto, Yanagida, Yasuko, Hatsuzawa, Takeshi, Usui, Taichi

    SENSORS AND MATERIALS   23 ( 2 )   135 - 146   2011

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  • Localized surface plasmon resonance optical characteristics for hydrogen peroxide using polyvinylpyrrolidone coated silver nanoparticles Reviewed

    Endo, Tatsuro, Shibata, Akinobu, Yanagida, Yasuko, Higo, Yakichi, Hatsuzawa, Takeshi

    MATERIALS LETTERS   64 ( 19 )   2105 - 2108   2010.10

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    DOI: 10.1016/j.matlet.2010.06.054

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  • Reflectometric detection of influenza virus in human saliva using nanoimprint lithography-based flexible two-dimensional photonic crystal biosensor Reviewed

    Endo, Tatsuro, Ozawa, Satoshi, Okuda, Norimichi, Yanagida, Yasuko, Tanaka, Satoru, Hatsuzawa, Takeshi

    SENSORS AND ACTUATORS B-CHEMICAL   148 ( 1 )   269 - 276   2010.6

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  • Fabrication of core-shell Structured nanoparticle layer substrate for excitation of localized surface plasmon resonance and its optical response for DNA in aqueous conditions Reviewed

    Endo, Tatsuro, Ikeda, Daisuke, Kawakami, Yukari, Yanagida, Yasuko, Hatsuzawa, Takeshi

    ANALYTICA CHIMICA ACTA   661 ( 2 )   200 - 205   2010.2

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  • DNA force-extension curve under uniaxial stretching Reviewed

    Hamid Dalir, Takasi Nisisako, Yasuko Yanagida, Takeshi Hatsuzawa

    MOLECULAR SIMULATION   36 ( 3 )   221 - 228   2010

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    DOI: 10.1080/08927020903193812

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  • Multipolar Electrical Forces for Microscale Particle Manipulation Reviewed

    Hamid Dalir, Yasuko Yanagida, Takeshi Hatsuzawa

    JOURNAL OF COMPUTATIONAL AND THEORETICAL NANOSCIENCE   6 ( 3 )   505 - 513   2009.3

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  • Probing DNA mechanical characteristics by dielectrophoresis Reviewed

    Hamid Dalir, Yasuko Yanagida, Takeshi Hatsuzawa

    SENSORS AND ACTUATORS B-CHEMICAL   136 ( 2 )   472 - 478   2009.3

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    DOI: 10.1016/j.snb.2008.11.004

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  • Enhancement of thermal properties of polyvinylpyrrolidone (PVP)-coated silver nanoparticles by using plasmid DNA and their localized surface plasmon resonance (LSPR) characteristics Reviewed

    Tatsuro Endo, Yasuko Yanagida, Takeshi Hatsuzawa

    Nanobiotechnology   4 ( 1-4 )   36 - 42   2008.12

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    DOI: 10.1007/s12030-009-9023-7

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  • DNA binding and bending protein-based DNA actuator and its practical realization Reviewed

    Tatsuro Endo, Hiroki Yoda, Yasuko Yanagida, Takeshi Hatsuzawa

    Nanobiotechnology   4 ( 1-4 )   43 - 49   2008.12

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    DOI: 10.1007/s12030-009-9025-5

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  • Quantitative determination of hydrogen peroxide using polymer coated Ag nanoparticles Reviewed

    Endo, Tatsuro, Yanagida, Yasuko, Hatsuzawa, Takeshi

    MEASUREMENT   41 ( 9 )   1045 - 1053   2008.11

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    DOI: 10.1016/j.measurement.2008.03.004

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  • Design and fabrication of nanostructures based on DNA ring-protein complex Reviewed

    Furukawa, Hideki, Endo, Tatsuro, Yanagida, Yasuko, Hatsuzawa, Takeshi

    JAPANESE JOURNAL OF APPLIED PHYSICS   47 ( 6 )   4810 - 4814   2008.6

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    DOI: 10.1143/JJAP.47.4810

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  • Stimuli-responsive hydrogel-silver nanoparticles composite for development of localized surface plasmon resonance-based optical biosensor Reviewed

    Endo, Tatsuro, Ikeda, Ryuzoh, Yanagida, Yasuko, Hatsuzawa, Takeshi

    ANALYTICA CHIMICA ACTA   611 ( 2 )   205 - 211   2008.3

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    DOI: 10.1016/j.aca.2008.01.078

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  • Fabrication of DEP Device for Cell Positioning and its Cell Viability Test

    TANAKA Yasuhiro, YANAGIDA Yasuko, HATSUZAWA Takeshi

    The Journal of the Institute of Electrical Engineers of Japan   128 ( 2 )   59 - 63   2008.2

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    Studies pertaining cell chips require a cell positioning technique for the application of cell engineering such as single cell analysis, etc. Dielectrophoresis (DEP) is one of the promising methods to realize simultaneous multi-cell positioning. Previously, several research groups performed DEP-based cell manipulation, for example, cell separation, sorting, and positioning. In this study, we verify cell viability after positioning by DEP. We have fabricated a saw-shaped electrode on a glass chip and demonstrated simultaneous multi-cell positioning wherein cells are arranged between electrodes using the negative DEP principle. We describe the designs of two types of electrodes as well as their electric field simulations. The test chips were fabricated by the standard microelectromechanical system (MEMS) technology, and the experiments were performed for both polystyrene beads and living cells. To investigate the influence of DEP on the cell, the viability of the cells after the positioning was examined using a fluorescent dye. The results of this examination confirmed that no cytotoxicity was observed in the case of negative DEP positioning. Consequently, it was shown that the principle of negative DEP can be applied to achieve cell positioning without having a hazardous effect on living cells.

    DOI: 10.1541/ieejsmas.128.59

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  • Construction of a Biosensor Operating on the Combined Principles of Electrochemical Analysis and Localized Surface Plasmon Resonance for Multiple Detection of Antigen-Antibody and Enzymatic Reactions on the Single Biosensor Reviewed

    Endo, Tatsuro, Takizawa, Hikaru, Yanagida, Yasuko, Hatsuzawa, Takeshi, Tamiya, Eiichi

    SENSORS AND MATERIALS   20 ( 6 )   255 - 265   2008

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  • On-chip single-cell lysis for extracting intracellular material Reviewed

    Norifumi Ikeda, Nobuaki Tanaka, Yasuko Yanagida, Takeshi Hatsuzawa

    JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS   46 ( 9B )   6410 - 6414   2007.9

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    DOI: 10.1143/JJAP.46.6410

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  • Colorimetric detection of volatile organic compounds using a colloidal crystal-based chemical sensor for environmental applications Reviewed

    Endo, Tatsuro, Yanagida, Yasuko, Hatsuzawa, Takeshi

    SENSORS AND ACTUATORS B-CHEMICAL   125 ( 2 )   589 - 595   2007.8

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    DOI: 10.1016/j.snb.2007.03.003

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  • High Speed Surface Micro-Polishing for Spurious Reduction of Small Quartz Crystal Blanks

    HATSUZAWA Takeshi, HAMANO Hisashi, SAITO Masashi, YANAGIDA Yasuko

    The Journal of the Institute of Electrical Engineers of Japan   127 ( 1 )   37 - 41   2007.1

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    Surface polishing is required for small crystal blanks to eliminate frequency spurious generated by the infinite rectangular shape. From the productivity viewpoint, bi-convex or plano-cylindrical surface are generally used to realize the energy trapping at the central part of the blanks. So far barrel polishing is the common fabrication technology to obtain bi-convex surface, however, the surface is finished insufficiently and fabrication process takes longer time as the blank size becomes small. To solve this difficulty, two types of new surface micro-polishing mechanisms with fixed abrasive and arrayed blank arrangement are experimentally examined to obtain plano-cylindrical surface. The fastest finishing time of 10 s for a blank is achieved together with the spurious elimination.

    DOI: 10.1541/ieejsmas.127.37

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  • Design and Fabrication of DNA-based Nanostructures using Plasmid-Protein Complex for Bio Device Reviewed

    Furukawa, Hideki, Endo, Tatsuro, Yanagida, Yasuko, Hatsuzawa, Takeshi

    2007 7TH IEEE CONFERENCE ON NANOTECHNOLOGY, VOL 1-3   154 - +   2007

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  • Photonic Crystal based Optical Chemical Sensor for Environmental Monitoring Reviewed

    Endo, Tatsuro, Yanagida, Yasuko, Hatsuzawa, Takeshi

    2007 7TH IEEE CONFERENCE ON NANOTECHNOLOGY, VOL 1-3   951 - +   2007

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  • Nano-Patricle Positioning on DNA Strand (2nd Report) : Long Chain Fabrication with Gold Nano-Beads by Base Sequence and Hybridize Improvement

    HATSUZAWA Takeshi, OSANAI Hiroshi, YANAGIDA Yasuko

    Journal of the Japan Society for Precision Engineering. Supplement. Contributed papers   72 ( 11 )   1407 - 1410   2006.11

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    DNA is one of the promising material for creating nano-mechanisms, because of its self positioning characteristics and well-developed handling technology. So far, a linear DNA periodic structure is realized, however, its length is limited in the range of sub μm. In this paper, fabrication process of the DNA chain is improved for longer periodic structure. Single strand DNA base sequence is optimized by a computer simulation so that it can be hybridized more efficiently in forming double strand DNA sub units. Also, for more free pitch design of the labeling period, spacer DNA for longer pitch is introduced in addition to the labeled DNA. To link the spacer and labeled DNAs in a designed order, non-palindrome cohesive ends are introduced for each unit blocks. The improved process enabled the DNA to form more than 7000bp (2.3μm) chains, which is 20 times as long as those obtained in the 1st report. Experimental results of electrophoresis and AFM micrographs are shown.

    DOI: 10.2493/jspe.72.1407

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  • Fabrication of periodic nano-structure using DNA fractions

    Takeshi Hatsuzawa, Yasuko Yanagida

    Proceedings of the 21st Annual ASPE Meeting, ASPE 2006   2006

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  • Electrochemical evaluation of cellular physiological status under stress in Escherichia coli with the rpoS-lacZ reporter gene Reviewed

    H Funabashi, M Ishikawa, M Mie, F Takahashi, Y Yanagida, M Aizawa, E Kobatake

    BIOTECHNOLOGY AND BIOENGINEERING   90 ( 4 )   509 - 515   2005.5

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    DOI: 10.1002/bit.20459

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  • Translational control by internal ribosome entry site in Saccharomyces cerevisiae. Reviewed

    Seino A, Yanagida Y, Aizawa M, Kobatake E

    Biochimica et biophysica acta   1681 ( 2-3 )   166 - 174   2005.1

  • On-chip biosensing of estrogen receptor-alpha at single molecular level Reviewed

    DHB Wicaksono, T Ebihara, H Funabashi, M Mie, Y Yanagida, M Aizawa, E Kobatake

    BIOSENSORS & BIOELECTRONICS   19 ( 12 )   1573 - 1579   2004.7

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    DOI: 10.1016/j.bios.2003.12.028

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  • Nano-Patricle Positioning on DNA Strand (1st Report) : Proposal of Basic Principle and Experimental Verification

    HATSUZAWA Takeshi, MORI Hiromitsu, YANAGIDA Yasuko

    Journal of the Japan Society for Precision Engineering. Supplement. Contributed papers   70 ( 6 )   863 - 866   2004.6

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    A novel nano-mechanism assemble technique using DNA strand and chemically modified gold nano-particles has been proposed. Four types of DNA short single strand have been synthesized and hybridized to form a unit-block of the nano-mechanism. One of the DNA strand is labeled by gold nano-particle so that each unit-block of the DNA works as a carrier and positioner of the particle. After ligating the unit-blocks by ligase, a long strand of DNA chain with periodic nano-particle can be assembled. A positioning resolution of 0.332nm, which is the helical pitch of the nuculic acid in solution, can be obtained in this technique. An experiment has been performed using three types of 33bp(base-pair) DNA and a 99bp DNA to form the unit-block, as well as avidin-biotin labeling technique for the nano-particle coupler. AFM micrographs show serial nano-particle chains with pitches of 31.3-32.8nm, which is almost the same as the theoretical values. This result indicates the usefulness of the proposed technique for nano-mechanism assembling.

    DOI: 10.2493/jspe.70.863

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  • Combined effect of electrical stimulation and cisplatin in HeLa cell death Reviewed

    M Manabe, M Mie, Y Yanagida, M Aizawa, E Kobatake

    BIOTECHNOLOGY AND BIOENGINEERING   86 ( 6 )   661 - 666   2004.6

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  • The construction of endothelial cellular biosensing system for the control of blood pressure drugs Reviewed

    K Kamei, T Haruyama, M Mie, Y Yanagida, M Aizawa, E Kobatake

    BIOSENSORS & BIOELECTRONICS   19 ( 9 )   1121 - 1124   2004.4

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    DOI: 10.1016/j.bios.2003.06.001

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  • Intracellular delivery of antibodies using TAT fusion protein A Reviewed

    M Mie, F Takahashi, H Funabashi, Y Yanagida, M Aizawa, E Kobatake

    BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS   310 ( 3 )   730 - 734   2003.10

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    DOI: 10.1016/j.bbrc.2003.09.071

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  • Development of immune cellular biosensing system for assessing chemicals on inducible nitric oxide synthase signaling activator Reviewed

    K Kamei, T Haruyama, M Mie, Y Yanagida, M Aizawa, E Kobatake

    ANALYTICAL BIOCHEMISTRY   320 ( 1 )   75 - 81   2003.9

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    DOI: 10.1016/S0003-2697(03)00360-9

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  • The secretory response through electric stimulation of differentiated PC12 rat pheochromocytoma cells transfected with neuropeptide Y fused with enhanced green fluorescent protein Reviewed

    A Mizuno, M Mie, Y Yanagida, M Aizawa, E Kobatake

    BIOTECHNOLOGY LETTERS   25 ( 7 )   547 - 552   2003.4

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    DOI: 10.1023/A:1022894220755

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  • Cellular biosensing system for assessing immunomodulating effects on the inducible nitric oxide synthase (iNOS) cascade Reviewed

    K Kamei, T Haruyama, M Mie, Y Yanagida, E Kobatake, M Aizawa

    BIOTECHNOLOGY LETTERS   25 ( 4 )   321 - 325   2003.2

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    DOI: 10.1023/A:1022339929026

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  • Induction of neural differentiation by electrically stimulated gene expression of NeuroD2 Reviewed

    M Mie, T Endoh, Y Yanagida, E Kobatake, M Aizawa

    JOURNAL OF BIOTECHNOLOGY   100 ( 3 )   231 - 238   2003.2

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    DOI: 10.1016/S0168-1656(02)00284-5

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  • Atomic force microscopy identification of transcription factor NF kappa B bound to streptavidin-pin-holding DNA probe Reviewed

    GH Seong, Y Yanagida, M Aizawa, E Kobatake

    ANALYTICAL BIOCHEMISTRY   309 ( 2 )   241 - 247   2002.10

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    DOI: 10.1016/S0003-2697(02)00303-2

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  • Non-destructive monitoring of rpoS promoter activity as stress marker for evaluating cellular physiological status Reviewed

    H Funabashi, T Haruyama, M Mie, Y Yanagida, E Kobatake, M Aizawa

    JOURNAL OF BIOTECHNOLOGY   95 ( 1 )   85 - 93   2002.4

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  • Ribosome display for selection of active dihydrofolate reductase mutants using immobilized methotrexate on agarose beads Reviewed

    F Takahashi, T Ebihara, M Mie, Y Yanagida, Y Endo, E Kobatake, M Aizawa

    FEBS LETTERS   514 ( 1 )   106 - 110   2002.3

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    DOI: 10.1016/S0014-5793(02)02334-7

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  • Fluorescent Monitoring of Cellular Physiological Status Depending on The Accumulation of ppGpp Reviewed

    Hisakage Funabashi, Masayasu Mie, Yasuko Yanagida, Eiry Kobatake, Masuo Aizawa

    Biotechnology Letters   24 ( 4 )   269 - 273   2002

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  • Genetically fused protein A-luciferase for immunological blotting analyses

    Xiao-Mei Zhang, Eiry Kobatake, Kiyoaki Kobayashi, Yasuko Yanagida, Masuo Aizawa

    Analytical Biochemistry   282 ( 1 )   65 - 69   2000.6

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    DOI: 10.1006/abio.2000.4584

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  • Catalytic activity of Teflon particle-immobilized protease in aqueous solution

    R Afrin, T Haruyama, Y Yanagida, E Kobatake, M Aizawa

    JOURNAL OF MOLECULAR CATALYSIS B-ENZYMATIC   9 ( 4-6 )   259 - 267   2000.4

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    DOI: 10.1016/S1381-1177(99)00104-6

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  • Single-molecular AFM probing of specific DNA sequencing using RecA- promoted homologous pairing and strand exchange

    Gi Hun Seong, Tomohisa Niimi, Yasuko Yanagida, Eiry Kobatake, Masuo Aizawa

    Analytical Chemistry   72 ( 6 )   1288 - 1293   2000.3

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  • Assembling of engineered IgG-binding protein on gold surface for highly oriented antibody immobilization

    S Kanno, Y Yanagida, T Haruyama, E Kobatake, M Aizawa

    JOURNAL OF BIOTECHNOLOGY   76 ( 2-3 )   207 - 214   2000.1

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  • Disposable creatinine sensor based on thick-film hydrogen peroxide electrode system

    EJ Kim, T Haruyama, Y Yanagida, E Kobatake, M Aizawa

    ANALYTICA CHIMICA ACTA   394 ( 2-3 )   225 - 231   1999.8

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    DOI: 10.1016/S0003-2670(99)00308-6

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  • Electrically stimulated modulation of cellular function in proliferation, differentiation, and gene expression

    M Aizawa, S Koyama, K Kimura, T Haruyama, Y Yanagida, E Kobatake

    ELECTROCHEMISTRY   67 ( 2 )   118 - 125   1999.2

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  • Design of a thermostable cell adhesion protein

    E Kobatake, K Onoda, Y Yanagida, T Haruyama, M Aizawa

    BIOTECHNOLOGY TECHNIQUES   13 ( 1 )   23 - 27   1999.1

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1023/A:1008809415499

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  • Site-directed lipid modification of IgG-binding protein by intracellular bacterial lipoprotein process

    SHIGEMATSU H, EBIHARA T, YANAGIDA Y, HARUYAMA T, KOBATAKE E, AIZAWA M

    J. Biotechnol.   75 ( 1 )   23 - 31   1999

  • Two types of electrochemical nitric oxide (NO) sensing systems with heat-denatured Cyt C and radical scavenger PTIO

    T Haruyama, S Shiino, Y Yanagida, E Kobatake, M Aizawa

    BIOSENSORS & BIOELECTRONICS   13 ( 7-8 )   763 - 769   1998.10

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    DOI: 10.1016/S0956-5663(98)00040-2

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  • Electrochemical nitric oxide (NO) sensing system with spin-trap reagent PTIO Reviewed

    T Haruyama, K Kamei, E Kobatake, Y Yanagida, M Aizawa

    TECHNICAL DIGEST OF THE SEVENTH INTERNATIONAL MEETING ON CHEMICAL SENSORS   259 - 261   1998

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  • Electrically induced neurite outgrowth of PC12 cells on the electrode surface

    Keisei Kimura, Yasuko Yanagida, Tetsuya Haruyama, Eiry Kobatake, Masuo Aizawa

    Medical and Biological Engineering and Computing   36 ( 4 )   493 - 498   1998

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Peter Peregrinus Ltd  

    DOI: 10.1007/bf02523221

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  • Novel electrochemical measurement of nitric oxide (NO) using spin-trap reagent

    T Haruyama, S Shiino, E Kobatake, Y Yanagida, M Aizawa

    PROCEEDINGS OF THE SYMPOSIUM ON CHEMICAL AND BIOLOGICAL SENSORS AND ANALYTICAL ELECTROCHEMICAL METHODS   97 ( 19 )   556 - 562   1997

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  • Molecular Mechanisms of Electrically Stimulated NGF Expression and Secretion by Astrocytes Cultured on the Potential Controlled Electrode Surface

    Sumihiro Koyama, Tetsuya Haruyama, Yasuko Yanagida, Eiry Kobatake, Masuo Aizawa

    Cellular Engineering   1(5)   189 - 194   1996

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MISC

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Research Projects

  • PDMSマイクロ流路を用いたCO2平衡器の最適化と小型海洋CO2センサへの応用

    Grant number:24K01091  2024.4 - 2028.3

    日本学術振興会  科学研究費助成事業  基盤研究(B)

    柳田 保子, 中野 善之, 三輪 哲也

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    Grant amount:\18590000 ( Direct Cost: \14300000 、 Indirect Cost:\4290000 )

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  • 口腔マイクロバイオームの新・存在意義~全身・口腔健康に寄与する亜硝酸産生の全容~

    Grant number:24K02657  2024.4 - 2028.3

    日本学術振興会  科学研究費助成事業  基盤研究(B)

    鷲尾 純平, 高橋 信博, 安彦 友希, 互野 亮, 佐藤 拓一, 柳田 保子

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    Grant amount:\18460000 ( Direct Cost: \14200000 、 Indirect Cost:\4260000 )

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  • 脱灰およびタンパク質分解抑制に基づく新たな根面齲蝕マネジメント法の創出

    Grant number:23K09452  2023.4 - 2026.3

    日本学術振興会  科学研究費助成事業  基盤研究(C)

    真柳 弦, 柳田 保子

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    Grant amount:\4680000 ( Direct Cost: \3600000 、 Indirect Cost:\1080000 )

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  • 海洋CO2センサの小型化を実現するマイクロ流路の作製とCO2平衡化特性

    Grant number:20H02363  2020.4 - 2024.3

    日本学術振興会  科学研究費助成事業  基盤研究(B)

    柳田 保子, 中野 善之, 三輪 哲也

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    Grant amount:\17810000 ( Direct Cost: \13700000 、 Indirect Cost:\4110000 )

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  • 脱灰・タンパク質分解包括モデルによる根面う蝕機序解明と予防・治療法の検討

    Grant number:19K10418  2019.4 - 2023.3

    日本学術振興会  科学研究費助成事業  基盤研究(C)

    真柳 弦, 柳田 保子, 鷲尾 純平, 高橋 信博

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    Grant amount:\4290000 ( Direct Cost: \3300000 、 Indirect Cost:\990000 )

    う蝕の予防法および治療法を検討するには、pHに加えカルシウムやフッ素など、複数のイオン濃度を同時かつ連続的に測定できる装置の開発が必要である。今年度は口腔内微小環境下で連続的にCa2+濃度を測定可能なマイクロデバイスの開発を目的とし、全固体イオン選択電極とマイクロ流路の統合について検討を行った。全固体イオン選択電極の小型化のために、PETフィルム上に金を蒸着し、直径3 mmの穴を開けたラミネートフィルムで金電極をラミネート加工した。センサ部分に導電性ポリマPEDOT(PSS)を滴下して加熱硬化し、さらにカルシウムイオノフォアETH129を含むイオン選択膜を滴下・風乾して成膜した。またマイクロ流路に小型化した全固体イオン選択電極を組み込むために、ポリカーボネート上に金を蒸着し、同様の手順でイオン選択電極を作製した後、流路を切削したアクリル板を接着して流路デバイスを作製した。小型化した全固体イオン選択電極とイオン濃度に対する電位応答は26.6 mV/decの感度を示し、理論的なネルンスト応答に近い応答を示すことから、口腔内のカルシウムイオン濃度範囲を測定することが可能と考えられる。また、全固体イオン選択電極を流路デバイスへ組み込んだ場合、0.01 Mナトリウムイオンを含むカルシウムサンプル溶液で、10-5から10-3 Mの範囲で電位依存性が確認され、部分的にネルンスト応答を示すことが分かった。
    さらに前年度に構築したタンパク質分解酵素に特異的な蛍光試薬と蛍光実体顕微鏡を用いて、酸により脱灰した歯根面からのタンパク質分解酵素を検出したモデルにより、種々の材料、薬剤等のタンパク質分解酵素の抑制作用についても検討した。その結果、フッ化ジアンミン銀にタンパク質分解酵素活性抑制効果があることが示唆された。

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  • Devices on molecular and DNA levels

    Grant number:13GS0017  2001 - 2005

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Creative Scientific Research

    FUJIHIRA Masamichi, KOBATAKE Eiri, YANAGIDA Yasuko, TSUKADA Masaru, WADA Yasuo, SAKOMURA Masaru

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    Grant amount:\403000000 ( Direct Cost: \335500000 、 Indirect Cost:\67500000 )

    Properties of functional molecules for electronics and photonics and those of biological supramolecules such as DNA and proteins have been studied for a long time as their average properties of a large number of molecules. The study of an isolated single molecule has recently begun by the use of spectroscopic methods or various scanning probe microscopes.
    In this study, a variety of devices on molecular and DNA levels will be pursued by i) exploring novel electronic, optic, chemical, and mechanical functions of single molecules experimentally, ii) envisaging application of such novel functions to various single molecular devices, iii) developing new processes and fabrication methods of nanostructures for the devices, iv) characterizing the nanostructures and measuring device characteristics, and v) rationalizing the device characteristics and in addition predicting unknown device characteristics theoretically.
    Through the five years projects, almost all of the above-described purposes in the present study have been realized under the strong cooperative research activities among the team members. The results obtained during the projects have been reported as 102 of original papers, review articles, and book chapters including 31 representative original papers. In particular, the followings are prominent achievements of the project. i) isolation of single functional molecules in matrices of a self-assembled monolayer (SAM) of a newly synthesized spherical hydrocarbon (BCO) thiol derivative on Au(111) and observation of their behavior with a scanning tunneling microscope (SPM), ii) discovery of effect of conformational change (trans to gauche) in an alkyl (or alkylene) chain of alkane thiol (or dithiol) on their single molecular conductance and the theoretical interpretation, iii) detailed researches on the effect of binding modes on single molecular conductance, iv) observation of terminal groups at atomic or molecular resolution in a mixed SAM using a non-contact AFM modified with a tip with a CaF_2 nano-crystal, v) fabrication of planer nano-gap electrodes for single molecular devices, vi) prediction of quantum loop current in a single molecular junction, and vii) theoretical study of electron-vibration coupling on carrier transfer in molecular bridges.

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  • 電極-細胞間シンクロナイゼーションに基づく細胞内遺伝情報発現制御とその応用

    Grant number:13022216  2001 - 2002

    日本学術振興会  科学研究費助成事業  特定領域研究

    柳田 保子

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    Grant amount:\13400000 ( Direct Cost: \13400000 )

    平成14年度は、電極-細胞間シンクロナイゼーションに基づく培養細胞の遺伝情報発現制御を、細胞機能変換の手段として応用した、培養細胞による細胞デバイス作製や細胞分化誘導への展開を行った。
    hsp70プロモーターの下流に、酵素、サイトカイン、ペプチドホルモン類のような生体有用物質の遺伝子を連結したプラスミドを作成し、形質導入した細胞は電位印加による有用物質産生制御が可能な細胞デバイスとなりうる。本年度はその例として、低周波・微小電位印加による分泌タンパク質産生細胞デバイスの作成を試みた。レポータータンパク質として分泌型アルカリフォスファターゼ(SEAP)を採用した。hsp70プロモーターの下流にSEAP遺伝子を組みこんだプラスミドを作成し、これを用いて筋芽細胞であるC2C12細胞に形質導入して安定発現株を得た。この細胞に熱刺激、または電気刺激を印加すると、培地中に活性型SEAPが安定的に分泌されることが明らかとなった。
    またhsp70プロモーターの下流に、神経細胞特異的分化誘導転写因子であるNeuroD2遺伝子、IRES領域、そしてEGFP遺伝子を連結したプラスミドを作成した。これを用いて神経芽細胞腫由来N1E-115細胞に形質導入した。この細胞は熱刺激および電位印加により神経突起を伸長し、神経細胞様へと分化することを、細胞形態変化および細胞内に発現したEGFPの蛍光観察により確認した。このことから電極-細胞間シンクロナイゼーションに基づく細胞分化誘導系を構築可能であることが示された。

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  • Design and construction of cell device for inslin release to control of glycemia

    Grant number:12358015  2000 - 2001

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

    AIZAWA Masuo, YANAGIDA Yasuko, TAJIMA Naoko, SASAKI Takashi, OHNO Tsuneya, NAKAMURA Mariko

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    Grant amount:\42720000 ( Direct Cost: \38400000 、 Indirect Cost:\4320000 )

    The research group in Jikei University has focused on generatio of novel cell lines that secrete insulin. Murine preadipocytes and myoblasts were engineered by the modified insulin cDNA with a recombinant retroviral vector whose proinsulin could be processed by ubiquitous convertase furin. Human insulin was detected by a human-specific immunoassay in culture media, and also by immunocytostaining.
    Tokyo Tech. research group have discovered that the 10 Hz frequency 0 to 0.3 V sine wave potential of electric stimulation one of the very slight physical stresses could induce the promoter activation of heat shock 70 (hsp70) promoter. Using this property, we constructed the expression vector containing engineered insulin cDNA under the control of hsp70 promoter. When transfected C2C12 myoblast cells were cultured under heat shock condition or electric stimulation the insulin contraining cultured medium was increased at 24 hour after stimulation.
    To accomplish our objectives "In vitro insulin production and secretion system", we have designed a basic diagram of the cell device to appropriate production of insulin by transformants celles in an environment of separatio from host immune systems and tried to produce the prototype by coordination with the scientists of In Vitrogen. In Vitro testing on cell chamber dummies for mid term stability, insulin passage, antibody passage and glucose passage before and after cell growth in the internal chamber. Furthermore, to quantitative the amount of insulin produced precisely, we evaluated a micro assay to quantificate the amount of insulin molecules by ELISA and BIACORE. When the cells were transplanted to diabetic mice with immunoisolating chamber, glucose level was recovered to near normal, demonstrating the biological potency of transplantation of the engineered cells. In addition to this, we found that insulin secretion from differentiated cells showed ten times larger than that from undifferentiated cells.

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  • Construction and Characterization of Micro-Structures Brains

    Grant number:11694137  1999 - 2001

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    AIZAWA Mauso, KOBATAKE Eiry, YANAGIDA Yasuko, HARUYAMA Tetsuya, COOPER J.M., CASS A.E.G.

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    Grant amount:\8500000 ( Direct Cost: \8500000 )

    We have developed engineered cell based outer cell potential measurement to monitor agonist-dependent cellular responses in order to monitor a function of post-synaptic receptor. Ion gate function give rise a potentiometric change on an attached electrode. As the GluR is largely expressed in insect cell and is exhibited on a cellular surface in huge population, change of outer cell potential can be obtained drastically when a ligand is Applied. Application of a natural agonist, induced a complex and robust potentiometric response in cell expressing glutamate (natural agonist) receptor. The outer cell potential profile of ligand-gated ion channel over expressed cell is affected by agonists and antagonists. Furthermore, several pharmacological agonists of the receptor also produced the potentiometric response. The observation cleary indicated that the cellular responses and engineered cells reflect post-synaptic receptor function. This novel approach should be applicatable to other ligand gated ion channel and holds promise as a cell-based biosensor for drug screening and other applications.

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  • RNA配列の選択的認識能を保持する新規タンパク質の作製

    Grant number:09780566  1997 - 1998

    日本学術振興会  科学研究費助成事業  奨励研究(A)

    柳田 保子

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    Grant amount:\2100000 ( Direct Cost: \2100000 )

    HnRNP D0タンパク質には、二つのRNA結合ドメイン(RBD)と、そのC末端側にグリシンに富む領域、という3つのRNA結合領域が存在し、UUAGGG繰り返し配列を有するRNAと特異的に結合するが、繰り返し配列中で一塩基置換されたRNAとは有意な結合活性を示さないという、厳密なRNA塩基配列特異的結合能をを特徴とするRNA結合タンパク質である。
    平成10年度は、前年の研究に引き続き、In vitro Amplification and Selection法を用いて、hnRNP D0タンパク質のC末端側RBD(D2)が特異的に認識するRNA配列について検討を行った。その結果、D2タンパク質が認識するRNA配列中には、4nt程度の短い共通配列がいくつか見出された。これらの配列は、N末端側RBDが特異的に認識するRNA配列に含まれるものとは異なることから、hnRNP D0タンパク質全体のRNA認識能の特異性に関して考察するためには、RBDのどのRNA認識能を優先して機能するか、など、さらに詳細な検討を行う必要があることが明らかとなった。
    また、これらのRBDと他の活性を有する酵素と組み合わせることにより、多機能を有するRNA結合タンパク質を作製したときに、これが高いRNA認識能を保持するかどうかを確認するために、これらのドメインとGFPとの融合タンパク質の、大腸菌または動物細胞による大量発現系を作製した。現在大腸菌発現系により得られたタンパク質を用いて、SELEX法により見出された共通配列を有するRNAや、UUAGGG配列を含むRNA、またその他のRNAとの結合活性を検討するとともに、HeLa細胞内でこれらの融合タンパク質を発現させることによるタンパク質の局在化や細胞機能への影響について検討中である。

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  • RNA結合蛋白質hnRNPDの配列特異的一本鎖核酸認識機構の解明

    Grant number:09249101  1997

    日本学術振興会  科学研究費助成事業  重点領域研究

    石川 冬木, 柳田 保子, 栗原 靖之

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    Grant amount:\1600000 ( Direct Cost: \1600000 )

    1.D1Hの溶液構造を高分解能(r.m.s.d=0.41オングストローム)で決定した。その結果、βαββαβフォールディング構造に加えて以下の構造が形成されていることがわかった。
    1)αヘリックスのN末端の構造を安定化するNキャッピング構造がα1及びα2に形成されている。
    2)α1にはαヘリックスのC末端側の構造を安定化するCキャッピング構造が形成されている。
    3)β2にはβバルジ構造が形成されている。
    4)二次構造を形成していないループ領域のうちloop1とloop5に含まれるアミノ酸の側鎖間に水素結合が見つかった。これらのloop1及びloop5はRNAと相互作用するloop3の真下に位置することから、RNAが結合する際にloop3を下から支えている可能性がある。
    2.RNAとの複合体に関して三重共鳴NMR測定を行い主鎖の帰属を行なった。その結果RNAとの相互作用部位がより正確になった。また、RNAが結合した状態でもD1Hの二次構造が保持されていることがわかった。
    3.複合体形成にともなうD1Hの主鎖の運動性をT1,T2及び15N-NOEを用いて調べた。相互作用に関与するloop3は、RNAが結合していないときは運動性が高いが、結合すると運動性が低くなることからinducedfitしている可能性がある。
    4.一方、D2の構造も二次構造を決定した。現在立体構造を求めるために解析を続けている。

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