JP5241209B2 - 試料前処理用デバイス及び試料分析方法 - Google Patents
試料前処理用デバイス及び試料分析方法 Download PDFInfo
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Description
図1は,本発明の試料前処理用デバイスを用いた分析手順の説明図である。本実施例では,基板上への疎水性シート吸着による微量反応槽の形成(S11),酵素,抗体等の平面基板上への固定化(S12),反応槽中への試料溶液の添加(S14),基板上に固定化した分子と試料との反応(S14),試料溶液の回収及び分析(S15)の順番で作業を進める。ただし本発明は本実施例のみに限定されるものではない。本実施例では試料前処理用デバイスの他,マイクロピペッター,密封容器,気相インキュベーター,洗浄容器を用いる。また必要に応じて,反応槽内の試料を撹拌するための撹拌装置(小型振動モーター)を用いる。
図2(b)に示すように,平面基板201上に深さ0.2〜0.5mmの溝を有した反応槽シート202を吸着させ,平面基板201と反応槽シート202の間に,試料や試薬を平面基板上に保持するための反応槽203を有する試料前処理用デバイス200を形成する。
図2(b)に示すように,固定化する試薬をマイクロピペッター205を使用して,試料前処理用デバイス200の平面基板201上に形成された反応槽203内部に流入口204より添加する。次に,図2(c)に示すように,試料前処理用デバイス200を水滴206とともに密封容器207中に設置し,気相インキュベーター208内で保温して平面基板201上への結合反応を行う。密封容器207中に,試料前処理用デバイス200を少量の水滴306と共に密封することにより,容器の内部の湿度を長時間保ち,平面基板上の試料や試薬の蒸発を防ぐことができる。その後,図2(d)に示すように,試料前処理用デバイスから反応槽シート202を取り外した後,試薬が固定化された平面基板201を,洗浄溶液を満たした洗浄容器209中で振盪し,未結合の分子を取り除く。
図2(e)に示すように,反応槽シート202を再度平面基板201上に吸着させて試料前処理用デバイス200を組み立て,マイクロピペッター205により血液等の試料溶液を,反応槽中の流入口204から添加する。
図2(f)に示すように,試料を反応槽203内に保持した状態で試料前処理用デバイスを水滴206とともに密封容器207中に設置し,気相インキュベーター208内で一定時間インキュベートし,固定化した分子と試料との反応を行う。必要に応じて撹拌装置(小型振動モーター)210を用い,反応槽内部の試料を撹拌する。
図2(g)に示すように,試料前処理用デバイス200の反応槽203中の試料を,マイクロピペッター205を用いて回収し,分析装置211によって分析する。
図5を用いて,本発明の試料前処理用デバイスを用いた実験例について説明する。本実験例では,平面基板上にタンパク質分解酵素の一種であるトリプシンを固定化し,PDMSによって作製した反応槽シートを基板上に吸着させ,反応槽内部にタンパク質の一種であるBSAを導入し,導入した試料に振動を与えて反応槽内部で撹拌し,試料が固定化したトリプシンによって消化されたことをHPLCによって確認した。
反応槽シートは縦35mm×横85mm×厚さ2mmのPDMS製シートであり,反応槽となる溝が3mm間隔で6個形成されている。溝は直径8mmの円二つが幅3.5mm,長さ3mmの流路によって連結された構造を持ち,深さは0.3mmである。反応槽内部の容量は40μLである。反応槽の両端には内部に試料を注入するための,直径1mmの流入口及び流出口が設けられている。
振動撹拌ユニットは,平面基板と反応槽シートを密着させて構成される試料前処理用デバイスを保持するためのホルダ401,振動モーター405を備えた振動ユニット404から構成される。ホルダは下部ホルダ402と上部ホルダ403から構成される。上部ホルダは枠状の形状で開口部を有し,枠部分で試料前処理用デバイスを保持するとともに,開口部から試料前処理用デバイスに形成された反応槽の流入口にアクセスすることができる。
本実験では,平面基板としてProteoChip(TypeA,Proteogen)を用いた。ProteoChipは,カリックスクラウン誘導体の一種であるタンパク質結合試薬‘ProLinker’をスライドグラス(縦26mm×横76mm)上にコーティングしたプロテインチップであり,ProLinkerとの相互作用によってタンパク質を表面に固定化することができる。
BSA(A9647,SIGMA)は,変性用バッファー(6M塩酸グアニジン,2.5mMEDTAを含む200mM Tris−HCl,pH 8.5)を用いて1mg/mLに調製した。1mLのタンパク質溶液に対し1μLの還元溶液(60mg/mL DTTを含む滅菌水)を添加し,溶液表面を窒素ガスによって30秒間静かに吹いた後,37℃で3時間静置してタンパク質を変性及び還元処理した。反応後,氷上で5分間冷却して液温を下げ,20μLのアルキル化溶液(50mg/mLヨードアセトアミドを含む変性用バッファー)を添加した。溶液表面を窒素ガスによって30秒間静かに吹いた後,室温・遮光条件下で1時間静置して還元後のシステイン側鎖をアルキル化した。最後に200mLの反応バッファー(Tris−HCl,pH8.5)に対して4℃で2時間の透析を3回繰り返し,溶液中の塩酸グアニジンを取り除いた。
トリプシン固定化済み平面基板に反応槽シート202を吸着させ,振動撹拌ユニットのホルダ402,403によって固定した後,反応槽内部に0.2mg/mLに調製した還元アルキル化済みBSAを注入した。振動ユニット404をセットし,37℃で30分間振動を添加することで消化反応を行った。
回収した消化済みBSAを逆相HPLC解析に供試し,未消化のBSAに相当するピークの減少から消化を確認した。測定条件は以下のとおりである。
カラム:CAPCELLPAK C18 MG(内径2mm×75mm,粒子径3μm,資生堂)
移動相A液:0.1%TFAを含む2%アセトニトリル
移動相B液:0.1%TFAを含む98%アセトニトリル
グラジエント:測定開始後5分間,A液比率100%で送液の後,5〜60分間でA液比率100%から40%(B液比率0%から60%)のリニアグラジエント
流速:0.2mL/分
検出:紫外部(214nm)の吸光度
図3に302として示した形状の反応槽を用いた場合のHPLC解析の結果を図6に示す。未消化BSAに相当するピークの消失(実線,保持時間50分)及び生成したペプチドに相当するピークの出現(破線,保持時間5〜40分)が確認された。図3に303として示した形状の反応槽を用いた場合にも,気泡形成が起こらないため同等の結果が得られる。
202:反応槽シート
203:溝(反応槽)
204:流入口/流出口
205:マイクロピペッター
206:水滴
207:密封容器
208:インキュベーター
209:洗浄容器
210:撹拌装置(小型振動モーター)
211:分析装置
402:下部ホルダ
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Claims (2)
- 高さに比して幅が広く上下面及び側面を壁面で囲まれた複数の扁平な反応槽と,
前記反応槽の上面の一端に設けられた試料注入口と,
前記反応槽の上面の前記試料注入口と反対側の端部に設けられた流出口とを有し,
前記反応槽は,前記試料注入口の付近における幅が最も狭く,前記試料注入口から前記反応槽の中央部付近までの第1の領域において,前記流出口に向かって幅が勾配的に広がる形状を有し,かつ,前記反応槽の中央部付近よりも前記流出口側の第2の領域の幅は,前記第1の領域付近から前記流出口に向かって勾配的に更に広がり、前記反応槽における最も幅が広い部分を前記反応槽の中央部付近よりも前記流出口側に有する
ことを特徴とする試料前処理用デバイス。 - 一端側に試料注入口が設けられ、その反対側の端部に流出口が設けられた反応槽を有する反応槽シートであって,前記反応槽は,前記試料注入口の付近における幅が最も狭く,前記試料注入口から前記反応槽の中央部付近までの第1の領域において,前記試料注入口から前記流出口に向かって,幅が勾配的に広がる形状を有し,かつ,前記反応槽の中央部付近よりも前記流出口側の第2の領域の幅は,前記第1の領域付近から前記流出口に向かって勾配的に更に広がり、前記反応槽における最も幅の広い部分を前記反応槽の中央部付近よりも前記流出口側に有する前記反応槽シートを平面基板上に吸着させ,前記平面基板と樹脂製の前記反応槽シートの間に複数の前記反応槽を形成する工程と,
前記試料注入口から各反応槽に固定化試薬を注入する工程と,
前記平面基板から前記反応槽シートを取り外し,前記平面基板を洗浄して当該平面基板に未結合の試薬を除去する工程と,
前記洗浄した平面基板に前記反応槽シートを再度吸着させて前記複数の反応槽を形成する工程と,
前記複数の反応槽に前記試料注入口から試料を注入し,前記試薬と反応させる工程と,
前記複数の反応槽から内部の試料を回収する工程と,
回収した試料を分析する工程と,
を有することを特徴とする試料分析方法。
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JP2007304905A JP5241209B2 (ja) | 2007-11-26 | 2007-11-26 | 試料前処理用デバイス及び試料分析方法 |
US12/323,490 US20090170217A1 (en) | 2007-11-26 | 2008-11-26 | Device for sample pretreatment, reactor sheet, and method of sample analysis |
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JP2007304905A JP5241209B2 (ja) | 2007-11-26 | 2007-11-26 | 試料前処理用デバイス及び試料分析方法 |
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Cited By (3)
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US8547629B2 (en) | 1998-03-19 | 2013-10-01 | Fujitsu Limited | Gain and signal level adjustments of cascaded optical amplifiers |
US8553319B2 (en) | 1996-05-02 | 2013-10-08 | Fujitsu Limited | Controller which controls a variable optical attenuator to control the power level of a wavelength-multiplexed optical signal when the number of channels are varied |
US8699126B2 (en) | 1996-05-28 | 2014-04-15 | Fujitsu Limited | Multi-wavelength light amplifier |
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JP6966266B2 (ja) * | 2017-09-05 | 2021-11-10 | 日本電波工業株式会社 | 感知センサの製造方法 |
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US5230866A (en) * | 1991-03-01 | 1993-07-27 | Biotrack, Inc. | Capillary stop-flow junction having improved stability against accidental fluid flow |
US5503985A (en) * | 1993-02-18 | 1996-04-02 | Cathey; Cheryl A. | Disposable device for diagnostic assays |
JPH0915116A (ja) * | 1995-06-29 | 1997-01-17 | Olympus Optical Co Ltd | 洗浄装置 |
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JP2005513441A (ja) * | 2001-02-07 | 2005-05-12 | バイオマイクロ システムズ インコーポレイテッド | 受動流体制御構造を組込んだ三次元マイクロフルイディクス |
JP2004163319A (ja) * | 2002-11-14 | 2004-06-10 | Sysmex Corp | 液体容器ユニットおよび接続機構 |
US20040101439A1 (en) * | 2002-11-21 | 2004-05-27 | Fusco Adam J | Biological and chemical reaction devices and methods of manufacture |
JP2005111567A (ja) * | 2003-10-02 | 2005-04-28 | Kobe Steel Ltd | 接合基板とその接合方法 |
JP2005168455A (ja) * | 2003-12-15 | 2005-06-30 | Olympus Corp | 細胞アレイ基板作製装置及び細胞アレイ基板の作製方法 |
JP4646204B2 (ja) * | 2005-01-27 | 2011-03-09 | ブラザー工業株式会社 | 検査対象受体、分取装置、及び分取方法 |
JP4372701B2 (ja) * | 2005-02-21 | 2009-11-25 | アイダエンジニアリング株式会社 | マイクロチップ |
WO2007001084A1 (ja) * | 2005-06-28 | 2007-01-04 | Kabushikikaisya Advance | 生化学分析装置及び生化学分析装置用担体 |
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JP2007113979A (ja) * | 2005-10-19 | 2007-05-10 | Ebara Corp | マルチ分光分析装置 |
JP2007212285A (ja) * | 2006-02-09 | 2007-08-23 | Enplas Corp | 流体取扱装置 |
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2007
- 2007-11-26 JP JP2007304905A patent/JP5241209B2/ja not_active Expired - Fee Related
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2008
- 2008-11-26 US US12/323,490 patent/US20090170217A1/en not_active Abandoned
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8553319B2 (en) | 1996-05-02 | 2013-10-08 | Fujitsu Limited | Controller which controls a variable optical attenuator to control the power level of a wavelength-multiplexed optical signal when the number of channels are varied |
US8699126B2 (en) | 1996-05-28 | 2014-04-15 | Fujitsu Limited | Multi-wavelength light amplifier |
US8547629B2 (en) | 1998-03-19 | 2013-10-01 | Fujitsu Limited | Gain and signal level adjustments of cascaded optical amplifiers |
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US20090170217A1 (en) | 2009-07-02 |
JP2009128247A (ja) | 2009-06-11 |
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