JP4783422B2 - プロテオリピド膜及び脂質膜バイオセンサー - Google Patents
プロテオリピド膜及び脂質膜バイオセンサー Download PDFInfo
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- JP4783422B2 JP4783422B2 JP2008506705A JP2008506705A JP4783422B2 JP 4783422 B2 JP4783422 B2 JP 4783422B2 JP 2008506705 A JP2008506705 A JP 2008506705A JP 2008506705 A JP2008506705 A JP 2008506705A JP 4783422 B2 JP4783422 B2 JP 4783422B2
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- biosensor
- silane
- lipid
- titanium
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Images
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/543—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals
- G01N33/54313—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals the carrier being characterised by its particulate form
- G01N33/5432—Liposomes or microcapsules
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/543—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals
- G01N33/54366—Apparatus specially adapted for solid-phase testing
- G01N33/54373—Apparatus specially adapted for solid-phase testing involving physiochemical end-point determination, e.g. wave-guides, FETS, gratings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/543—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals
- G01N33/551—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals the carrier being inorganic
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/92—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving lipids, e.g. cholesterol, lipoproteins, or their receptors
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Immunology (AREA)
- Engineering & Computer Science (AREA)
- Molecular Biology (AREA)
- Chemical & Material Sciences (AREA)
- Biomedical Technology (AREA)
- Hematology (AREA)
- Urology & Nephrology (AREA)
- Physics & Mathematics (AREA)
- Microbiology (AREA)
- Cell Biology (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Biotechnology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Pathology (AREA)
- Inorganic Chemistry (AREA)
- Biophysics (AREA)
- Endocrinology (AREA)
- Apparatus Associated With Microorganisms And Enzymes (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
- Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
- Medicinal Preparation (AREA)
- Steroid Compounds (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Description
本出願は、2005年4月12日に提出された、米国特許出願番号 第60/670,524号の利点をクレームするものであり、その全文は参照により本願に援用される。
我々は、膜タンパク質の付着を制御できるであろうことを種々の単一及び二重層の作成により実証してきた。脂質、ヘテロ及びホモ機能性脂質、リン脂質、コレステロール、単鎖及び二重鎖両親媒性物質、ミセル形成組成物、リポソーム形成物質、イオン性洗剤、陰イオン性洗剤、カチオン性洗剤、両性イオン性洗剤及びその他の試薬であって、膜結合タンパク質の付着及び折り畳みを可能とするための適切な環境の作成に必要とされるものを含むが、これに制限されることのない、様々な疎水性物質などの代替試薬を使用する当業者にとって、本発明は直接または前もってタンパク質に固定化された生体分子、小分子または試験用試薬の、該膜状環境におけるバイオセンサーに対する付着、折り畳み、ならびに結合性試験のためのツールとなるものである。
安定した疎水性比色共鳴バイオセンサー表面は、撥水シラン(Amersham Biosciences 17−1332−01)を、比色共鳴バイオセンサーTiO表面を含むウェル、例えば、96−ウェルプレートに注入することにより調製することができる。7分間インキュベーションを行なう。90μlのヘキサン(無水)(Sigma 227064)を各ウェルに注入する。90μlのシラン混合物を、マルチチャンネルピペットを用いて吸引する。90μlのヘキサン(第2回目の注入)をウェルに注入する。90μlのシラン混合物(第2回目の吸引)を、マルチチャンネルピペットを用いて吸引する。90μlのヘキサン(第3回目の注入)をウェルに注入する。ウェルに残っている全溶液を、真空ポンプに接続した8チャンネルステンレススチール製の多岐管を用いて吸引する。最終吸引後、バイオセンサーを空気中に戻す。100μlのPBSでプレートを二回洗浄した後、プレートに100μlのPBSを充填する。エネルギーをプレート中にわたって均一に分散させるために超音波処理浴内でプレートを前後に動かしながら、5乃至10秒間、プレートを超音波処理する。N2ガンを使用し、プレートの裏面を乾燥させる。
撥水処理の前に、バイオセンサープレートをO2プラズマ処理した。バイオセンサープレートの直径6mmウェル内で、50μlの撥水シランによる7分間のインキュベーション処理を行なった。残存するシランを吸引し、90μlのヘキサンでバイオセンサーを3回洗浄した。最終ヘキサン洗浄後、バイオセンサープレートを5分間処理した。バイオセンサープレートをpH7.4のPBSで3回洗浄した。pH6.0、7.4、9.0及び10.1の10mM NaH2PO3緩衝液中において、0.1mg/ml PPL溶液を調製したが、これらの緩衝液は、pH4.0の11mM NaH2PO3緩衝液を1MのNaOHで調節することにより調製された。40mlのPPL溶液をバイオセンサープレートのウェルに加え、室温で一晩乾燥させた。バイオセンサープレートをPBSで3回洗浄した。図6は、モデルタンパク質であるPPLの捕捉を改善することを目的とした、疎水性コーティングの最適化の結果である。
撥水処理前に、バイオセンサーにO2プラズマ処理を行なった。バイオセンサー物質の一部分に、撥水シランによる7分間のインキュベーション処理を行なった。残存するシランを吸引し、バイオセンサーをヘキサンで3回洗浄した。最終ヘキサン洗浄後、バイオセンサーを5分間処理した。その後バイオセンサーををpH7.4のPBSで3回洗浄した。水接触角測定を、AST製品(Billerica、MA)である水接触角測定装置を使用して行なった。図7を参照されたい。
PLURONIC(登録商標)界面活性剤の1%溶液を水中で作製した。この溶液の100μlを非加工TiOもしくは疎水性TiO(撥水シラン修飾)ウェルに分注する。この界面活性剤を2時間かけてセンサー表面に吸収させた。その後バイオセンサーを水で3回洗浄した。
0.1mg/mlでストレプトアビジン溶液を含むPBSを作製した。この溶液の100μlをウェルに分注した。ウェル内の溶液を1時間インキュべートした。結合しなかった物質を除去してバイオセンサーをPBSで3回洗浄した。
1mg/ml乃至0.001mg/mlの様々な濃度のPLURONIC(登録商標)F127を水中で作製した。100μlのPLURONIC(登録商標)溶液を、疎水性処理済みTiO(撥水シラン修飾)ウェルに分注した。この界面活性剤を2時間かけてセンサー表面に吸収させた。液体界面活性剤を除去し、バイオセンサーを水で3回洗浄した。100μlのストレプトアビジン溶液(PBS中1mg/ml)を、PLURONIC(登録商標)でコーティングしたウェルに分注して、1時間インキュベートした。ストレプトアビジンを除去してバイオセンサーをPBSで3回洗浄した。
X 図8は、界面活性剤(ポリプロピレンオキシド)の疎水性ブロックと疎水性撥水表面との好ましい相互作用に起因した、より多量のPLURONIC(登録商標)界面活性剤結合を示している。PLURONIC(登録商標)ウェルに対してはN=24、ならびに、対照ウェルに対してはN=8。
図9は、PLURONIC(登録商標)界面活性剤の分子量の関数として、非加工TiOに対するストレプトアビジン結合の減少を示している。バイオセンサーへのPLURONIC(登録商標)洗剤吸着の効果、ならびに、撥水層の表面上におけるPLURONIC(登録商標)層の形成、したがって、バイオセンサー上に二重の層(すなわち、撥水性の疎水性層及びPLURONIC(登録商標)の疎水性層)が形成されたことを実証している。このことは、二重層に修飾されたセンサー表面に対するタンパク質の付着及び付着密度の制御能をさらに実証している。PLURONIC(登録商標)ウェルに対してはN=24、ならびに、対照ウェルに対してはN=8。
図10は、より高密度のPLURONIC(登録商標)を吸着した表面は、その下の疎水性TiO表面に対するストレプトアビジン結合を低下させることを示している。対照表面には非加工TiO及び撥水修飾TiOが含まれる。PLURONIC(登録商標)ウェルに対してはN=24、ならびに、対照ウェルに対してはN=8。
PLURONIC(登録商標)界面活性剤は、撥水修飾表面に対するタンパク質結合量を制御するために使用できる。吸着されたPLURONIC(登録商標)層であって、その中に分散させたタンパク質を含むものは、対象のタンパク質を正確に選択することによって、ならびに、吸着された界面活性剤層中の隙間のタンパク質に適するようにPLURONIC(登録商標)層の密度を注意深く操作することによって、膜結合タンパク質のためのモデルシステムとして使用することができるであろう。表11は種々のPLURONIC(登録商標)修飾表面に対するストレプトアビジン結合を示している。タンパク質の結合量は、PLURONIC(登録商標)密度の低下にしたがって、特定の臨界濃度に減少し、その後PLURONIC(登録商標)コーティングの完全性/連続性の関数として増加する。
pH7.4のPBSでバイオセンサープレートを3回洗浄した。PBSを除去し、新たな溶液を加えて25乃至40分間インキュべートを行なった。
a PBS
b 2.5%のDMSOを含むPBS
c 2.5%のグリセロールを含むPBS
d 0.5%のTWEEN(登録商標)20を含むPBS
e 5%のDMSOを含むPBS
プレートはPBSで10回洗浄した。
リン酸を含む環境は、生体脂質の重要な特性である。これらは一般的に脂質のヘテロ機能要素として発見されるものであり、非極性区画を隔離するように脂質を隔離し、正しく位置づける。本実施例では、バイオセンサーと膜状環境との結合した成分を保持していることが示されており、とりわけ、これは脂質試験の支持表面である、シラン機能性を有するリン酸塩の二層構造に関連している。
TiO2コート化BIND BIOSENSOR(登録商標)試料を、0.0145MのH3PO4溶液を含む水中で、様々な期間で浸した。バイオセンサー試料をリン酸浴から取り除き、水で十分に洗浄した。試料を80℃で18時間乾燥させ、さらなる解析及び修飾まで貯蔵した。アミノプロピルトリメトキシシランの1%溶液を、95%エタノール中で新たに作成した。新たに作成したアミノプロピルトリメトキシシラン溶液を含む95%エタノール中に、バイオセンサーストリップを一分間浸し、エタノールで4回洗浄して窒素下で乾燥させた。バイオセンサーストリップを、アルミ箔パッケージ中で65%の相対湿度にて一晩貯蔵した。表5は、TiP及びシラン修飾TiP表面のXPS結果を示す。
Claims (13)
- バイオセンサーの表面が酸化チタン、二酸化チタンまたはリン酸チタンであり、酸化チタン、二酸化チタンまたはリン酸チタン表面をシランで被覆して、酸化チタン−シラン、二酸化チタン−シランまたはリン酸チタン−シラン表面を形成するとともに、脂質二分子層または脂質単分子層が、酸化チタン−シラン、二酸化チタン−シランまたはリン酸チタン−シラン表面に固定化されている、比色共鳴バイオセンサーまたは格子型導波路バイオセンサー。
- バイオセンサーが、マイクロタイタープレートの底部に組み込まれる、またはマイクロアレイフォーマット内にある、請求項1に記載のバイオセンサー。
- バイオセンサーは、マイクロタイタープレートの底部に組み込まれるものであり、マイクロタイタープレートの各ウェルが約5mm2乃至約50mm2である、請求項2に記載のバイオセンサー。
- 脂質二分子層または脂質単分子層は、標識を有さない、請求項1に記載のバイオセンサー。
- バイオセンサーが、一種またはそれ以上の界面活性剤でさらに被覆されている、請求項1に記載のバイオセンサー。
- 酸化チタン−シラン表面、二酸化チタン−シラン表面またはリン酸チタン−シラン表面を、PEO(a)−PPO(b)−PEO(a)の形状でポリエチレンオキシド及びポリプロピレンオキシドとのブロック共重合体で被覆した、請求項1に記載のバイオセンサー。
- 比色共鳴バイオセンサーまたは格子型導波路バイオセンサーを用いた、脂質二分子層または脂質単分子層における化学的あるいは物理的相互作用を分析する方法であって、脂質層を種に接触させること、ならびに、(a)光の波長がシフトすると種が脂質層と相互に作用する場合には、バイオセンサーの照射に使用される光の反射波長における最大値または伝送波長における最小値を検出することにより、あるいは、(b)屈折率の変化が、種が脂質層と相互に作用したことを示した場合には、バイオセンサーの照射に使用される光の屈折率の変化を検出することにより、脂質層と種の相互作用を分析することが含まれるものであり、ここで、バイオセンサーは酸化チタン−シラン、二酸化チタン−シランまたはリン酸チタン−シラン表面を含み、脂質二分子層または脂質単分子層が酸化チタン−シラン、二酸化チタン−シランまたはリン酸チタン−シラン表面上に固定化されている、該方法。
- バイオセンサーが、マイクロタイタープレートの底部に組み込まれる、またはマイクロアレイフォーマット内にある、請求項7に記載の方法。
- バイオセンサーは、マイクロタイタープレートの底部に組み込まれるものであり、マイクロタイタープレートの各ウェルが約5mm2乃至約50mm2である、請求項8に記載の方法。
- 約300またはそれ以上の試料を約10分またはそれ以内で分析することが可能である、請求項7に記載の方法。
- 脂質層は、静止状態で種に接触する、請求項7に記載の方法。
- 脂質層と種との相互作用が、静止状態で分析される、請求項7に記載の方法。
- 脂質層及び種は、無標識である、請求項7に記載の方法。
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US20090192049A1 (en) | 2009-07-30 |
EP1872129B1 (en) | 2010-07-28 |
WO2006127167A3 (en) | 2007-03-22 |
CA2604099C (en) | 2011-02-15 |
US20060275825A1 (en) | 2006-12-07 |
WO2006127167A2 (en) | 2006-11-30 |
CA2604099A1 (en) | 2006-11-30 |
CN101180541A (zh) | 2008-05-14 |
AU2006249657B2 (en) | 2011-02-10 |
DE602006015793D1 (de) | 2010-09-09 |
HK1109804A1 (en) | 2008-06-20 |
NZ562794A (en) | 2010-07-30 |
ATE475886T1 (de) | 2010-08-15 |
AU2006249657A1 (en) | 2006-11-30 |
EP1872129A2 (en) | 2008-01-02 |
JP2008536148A (ja) | 2008-09-04 |
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