JP5661795B2 - 診断用素子、及び診断用素子を含む診断装置 - Google Patents
診断用素子、及び診断用素子を含む診断装置 Download PDFInfo
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Description
ヒドロゲル形成
次の成分を含む組成物が本発明の診断用ゲルを形成するために使用された:12.3マイクロリッター(μl)のポリエチレン−ジアクリレート−700(PEG−DA−700)(Sigma Aldrichから入手)、0.4μlの光開始剤DAROCUR(R)1173、5ミリグラム(mg)のNaHCO3(0.62M)及び87μlのリン酸緩衝生理的食塩水(PBS)。曝露条件:10秒。光強度25〜200mW/cm2。H=75マイクロメートル(μm)。W=200−400μm。長方形状マスクが曝露の際に使用された。本発明の診断用ゲルの寸法は次の通りであった:300μm長さ、200μm幅及び75μm厚さ。図14は、数字102で表される、本発明の診断用ゲルの写真を示す。前記ポロゲンで生成される孔はここで明瞭に見ることができる。
装置を、SU−8ほとレジスト((Microchem)でパターン化されたポジ型チャンネルを含むシリコンウェハ上にポリジメチルシロキサン(PDMS、Sylgard(R)184、Dow Corning)を流しこんで作成された。前記PDMS装置の厚さは、常に5mm以上が維持された。装置は、外科メスでPDMSチャンネルから切り出して製造し、入口ポートを作るために生検パンチを用いて1端部に孔を開けた。PDMS装置はその後、ガラススライドへ密閉された。前記ガラススライドは前記チャンネルだけの上、及び前記チャンネルの下に置かれる前記ガラススライドの領域上にPDMSの薄い犠牲層を置いた後にPDMSでスピンコーティングされている。このことは、前記オリゴマーが非プラズマ処理PDMS表面へのみ曝露されることを確実にし、一方で前記装置がなお効果的に密閉されることを確実にする。
マイクロ流体装置の設計は図2に示される。前記マイクロ流体装置は、3つの入口(タンパク質の多重性のための)を持ち、これらは1つのチャンネル及び他の端部で1つの出口を形成するように組み合わされている。前記チャンネル寸法は、5000μm長さ、300μm幅及び75μm高さであった。前記チャンネル幅は、構成領域又は前記ゲルを押し込むための入口通路として呼ばれる1端部でくびれている。前記くびれ部の左側はゲル形成領域、又は調製ポートとされ、多孔性ゲルを形成するために層流理論を用いて多重様式で重合される。前記ゲルは前記くびれ部に押し込まれ、捕捉領域又は保持ポートとされるくびれ部の他の側に捕捉される。異なる幅のくびれ部、即ち200μm、150μm及び100μmを持つ3つの異なる装置が設計された。前記出口チャンネルの幅は、前記くびれ部領域チャンネルの幅の半分であり、即ち100μm、75μm及び50μmである。
ヒドロゲルから発光される蛍光シグナルの検出は、Coolsnap EZ CCDカメラ (Photometries、Singapore)を用いて撮影された画像を用いて測定された。それぞれのストリップからのシグナル強度は定量化する前にImageJ softwareを用いて平均化された。
ヒドロゲルの捕捉は、ある最小閾値圧力(Pmin)が前記構造をその幅よりも小さいチャンネルを通って絞り込まれるためには要求される、という前提に依存する。さらに一度捕捉されると前記粒子は、反対方向に搾り出される前に、ある最大閾値圧力(Pmax)に耐え得る。従って前記製造プロセスにおいて、圧力Pmanが使用され、ここで(Pmin<Pman<Pmax)である。前記アッセイの間、前記使用圧力(Peli)は、前記粒子がそれが入った方向へ絞り出されないようにする必要があり、従ってPeli<Pminである。前記記載された閾値圧力は、ヒドロゲルの機械的性質及び前記チャンネル構造の立体構造の関数となる。これらのパラメータへの前記閾値圧力の定量的依存性を記述する式は、ユーザの知識と熟練度、装置経験及びデータ履歴に基づいて導き出され得る。
ここで説明された包埋スキームは、包埋ヒドロゲルを含む多数のチャンネルを製造することに拡張され得る。1つの例では前記PDMSガスケットが使用され、かつ別々のチャンネルで制御されて圧力及び真空が前記ガスケットをそれぞれ閉じかつ開くことが望まれるように適用される。圧力又は真空は、超小型3方向セレノイドバルブ(Pneumadyne)を介して適用され、Labview(TM)で書かれたプログラムを用いて制御された。
Claims (12)
- 診断用素子であり、前記診断用素子は:
入口通路;
孔を含む診断用ゲルを包埋する保持ポート;及び
出口通路;
を含み、前記入口通路及び前記出口通路が前記保持ポートのそれぞれ異なるいずれかの側にあり、
さらに、前記入口通路上に位置する第1の凹部を含む、診断用素子。 - 請求項1に記載の診断用素子であり、前記診断用ゲルが、5ナノメートルから1000ナノメートルの範囲のサイズを持つ孔を含む、診断用素子。
- 請求項1に記載の診断用素子であり、前記診断用ゲルが、PEG−ジアクリレート系材料である、診断用素子。
- 請求項1に記載の診断用素子であり、さらに、前記出口通路上に第2の凹部を含む、診断用素子。
- 請求項1に記載の診断用素子であり、前記診断用素子が環状オレフィン系ポリマーで形成された、診断用素子。
- 請求項1に記載の診断用素子を含む、診断装置。
- 診断装置であり、前記診断装置が:
少なくとも1つの入口ポート;
調製ポート;
入口通路であり、前記入口ポートと前記入口通路が前記調製ポートのそれぞれ異なるいずれかの側にある、入口通路;
孔を含む診断用ゲルを含む少なくとも1つの保持ポート;
出口通路であり、前記入口通路と前記出口通路が前記少なくとも1つの保持ポートのそれぞれ異なるいずれかの側にある、出口通路;及び
前記出口通路に隣接する出口ポート;
を含み、
さらに、前記入口通路上に位置する第1の凹部を含む、診断装置。 - 請求項7に記載の診断装置であり、前記診断用ゲルが、5ナノメートルから1000ナノメートルの範囲のサイズを持つ孔を含む、診断装置。
- 請求項8に記載の診断装置であり、前記診断用ゲルがPEG−ジアクリレート系材料である、診断装置。
- 請求項7に記載の診断装置であり、さらに、前記出口通路上に第2の凹部を含む、診断装置。
- 請求項7に記載の診断装置であり、前記少なくとも1つの入口ポートのうち少なくとも1つの入口ポートが、サンプル導入ポートである、診断装置。
- 請求7に記載の診断装置であり、前記診断装置が環状オレフィン系ポリマー材料である、診断装置。
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US9297784B2 (en) * | 2012-12-05 | 2016-03-29 | Caliper Life Sciences, Inc. | Device and method for extracting target objects from a sample |
US20140151229A1 (en) | 2012-12-05 | 2014-06-05 | Caliper Life Sciences, Inc. | Manipulation of objects in microfluidic devices using external electrodes |
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