JP5360366B2 - 共有ゾーンを有する分析デバイス - Google Patents
共有ゾーンを有する分析デバイス Download PDFInfo
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- JP5360366B2 JP5360366B2 JP2008213632A JP2008213632A JP5360366B2 JP 5360366 B2 JP5360366 B2 JP 5360366B2 JP 2008213632 A JP2008213632 A JP 2008213632A JP 2008213632 A JP2008213632 A JP 2008213632A JP 5360366 B2 JP5360366 B2 JP 5360366B2
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Description
(a)各々標識付き結合剤を固定化するための検出ゾーンを有する流路を含み、1つまたは両方の検出ゾーンでの標識付き結合剤の検出が1種以上の分析物の存在および/または量を示す第1および第2分析部と、
(b)共有参照ゾーンと、
(c)検出ゾーンおよび参照ゾーンを照明するための1つ以上の光源と、
(d)検出ゾーンおよび参照ゾーンからの光を検出するための1つ以上の光検出器であって、大きさが検出された光の量に関連する信号を発生する、光検出器と、
(e)光検出器からの信号を処理するための信号処理手段とを含む。
(a)検出ゾーンおよび共有参照ゾーンを照明するための1つ以上の光源と、
(b)検出ゾーンおよび参照ゾーンからの光を検出するための1つ以上の光検出器であって、大きさが検出された光の量に関連する信号を発生する、光検出器と、
光検出器からの信号を処理するための信号処理手段とを含み、共有参照ゾーンから得た信号は検出ゾーンから得た信号の値を補償するために用いられる。
(a)各々標識付き結合剤を固定化するための検出ゾーンを有する流路を含み、1つまたは両方の検出ゾーンでの標識付き結合剤の検出が1種以上の分析物の存在および/または量を示す第1および第2分析部と、
(b)共有対照ゾーンと、
(c)検出ゾーンおよび対照ゾーンを照明するための1つ以上の光源と、
(d)検出ゾーンおよび対照ゾーンからの光を検出するための1つ以上の光検出器であって、大きさが検出された光の量に関連する信号を発生する、光検出器と、
(e)光検出器からの信号を処理するための信号処理手段とを含む。
標識付き結合剤を固定化するための検出ゾーンを有する流路を含み、1つまたは両方の検出ゾーンでの標識付き結合剤の検出は1種以上の分析物の存在および/または量を示す第1および第2分析部と、共有対照ゾーンとを含み、この分析読み取り機は、
(a)検出ゾーンおよび共有対照ゾーンを照明するための1つ以上の光源と、
(b)記憶された対照信号閾値と、
(c)検出ゾーンおよび対照ゾーンからの光を検出するための1つ以上の光検出器であって、大きさが検出された光の量に関連する対照信号および検出信号を発生する、光検出器と、
(d)光検出器からの信号を処理して対照ゾーンから得た信号を対照信号閾値と比較し、対照信号が対照信号閾値と等しいか対照信号閾値より大きければ、両方の分析部が正確に行われたことを決定する信号処理手段とを含む。
低感度試験ゾーン(高濃度の分析物の測定用)および高感度試験ゾーン(低濃度の分析物の測定用)を含む分析デバイス用のそれぞれのゾーンから決定された信号値は、以下の信号演算手段によって求められる。
各時間点tについて、各窓の窓比は次のように計算される。
Ref比t=(フィルタリングされた参照窓の値)時間=0/(フィルタリングされた参照窓の値)時間=t
HS比t=(フィルタリングされたHS試験窓の値)時間=0/(フィルタリングされたHS試験窓の値)時間=t
LS比t=(フィルタリングされたLS試験窓の値)時間=0/(フィルタリングされたLS試験窓の値)時間=t
Ctrl比t=(フィルタリングされたCtrl試験窓の値)時間=0/(フィルタリングされたCtrl試験窓の値)時間=t
正規化された相対減衰パーセント(%A)は、参照(ref.)窓の窓比と考えている窓比(対照または試験窓)との差を参照窓の窓比で除し、100%を掛けることによって与えられる。
HSt(%A)=[(参照比t−HS試験比t)/参照比t]×100%
LSt(%A)=[(参照比t−LS試験比t)/参照比t]×100%
Ctrlt(%A)=[(参照比t−Ctrl試験比t)/参照比t]×100%
本発明の第1態様による分析デバイスは、検出ゾーンの上流に提供された標識付き結合剤を含む第1分析試験ストリップと、分析物用の標識付き結合剤および第2(スカベンジャー)結合剤、ならびに検出ゾーンおよび対照ゾーンの上流に提供された対照ゾーン用の標識付き結合剤を含む第2分析試験ストリップを含んで構成された。
検出ゾーンは、PBSAバッファー中の濃度3mg/mlの抗β−hCG抗体(インハウスクローン3468)のラインを、1μl/cmの速度で長さ350mm×幅40mm(Whatman)、厚さ90から100ミクロンの175ミクロンの裏打ち層に積層された8ミクロンの孔サイズを有する寸法のニトロセルロース帯上に分配することによって調製した。抗β−hCG抗体は、Biodot xyz3050分配プラットフォームを用いて、ライン幅約1.2mmおよび長さ約300mmとしてニトロセルロースの長さに沿って10mmの位置に加えた。
標識付き結合剤を以下の計画にしたがって調製した。
(1)Duke Scientific製の青ラテックス粒子(直径400nm、10%固体(w/v)のDB1040CB)を100mMの四ホウ素二ナトリウムバッファーpH8.5(BDH AnalaR 102676G)(DTB)で2%固体(w/v)に希釈する。
(2)2つのEppendorf遠心チューブ中の体積2mlの希釈ラテックスを17000rpm(25,848rcf)で10分間、Heraeus Biofuge 17RS遠心機で遠心して希釈ラテックスを洗浄する。上澄み液を除去して廃棄し、ペレットを100mMのDTB中に再懸濁させて1mlの総体積中に4%固体(w/v)を得る。
(3)エタノールと酢酸ナトリウム(5%w/vの酢酸ナトリウムSigmaS−2889と95%エタノールBDH AnalaR 104766P)の混合物を調製する。
(4)100μlのエタノール−酢酸ナトリウム溶液をステップ2で洗浄したラテックスに加える(これはラテックス体積の10%である)。
(5)抗体株(インハウスクローン3299)を希釈してDTB中の約1200μg/mlの抗体を得る。
(6)ステップ5で希釈した抗体1ml体積を41.5℃に設定した水浴で約2分間加熱する。また、ステップ4の洗浄したラテックス+エタノール−酢酸ナトリウムを同じ水浴で2分間加熱する。
(7)希釈抗体をラテックス+酢酸エタノールに加えて良く混合し、磁気攪拌装置と混合物中に置いた磁気攪拌棒(magnetic flea)を用いて混合しながら41.5℃に設定した水浴中で1時間インキュベートする。
(8)40mg/mlのBovine Serum Albumin(BSA)溶液(脱イオン水中のIntergen W22903)を調製する。40mg/mlのBSAと等しい体積をラテックス/抗体/酢酸エタノールの混合物に加えることによってラテックスを遮断し、連続的に攪拌しながら水浴中で41.5℃で30分間インキュベートする。
(9)ステップ2のように混合物を17000rpmで10分間遠心する(体積をEppendorfチューブ間で1mlのロットに分割する)。上澄み液を除去して廃棄し、ペレットを100mMのDTB中に再懸濁させる。ステップ2の遠心を繰り返し、上澄み液を除去して廃棄し、Air Brushing Buffer(20%(w/v)のスクロースSigma S8501、100mMのTrizma Base Sigma T1503 pH9中の10%のBSA(w/v))中でペレットを再懸濁させる。Air Brushing Bufferを加えて4%(w/v)固体ラテックスを得る。
検出ゾーンは以下のように調製した。
PBSAバッファー中のMAbマウス抗ヒトβ−hCG抗体(クローン3468)3mg/mlをBiodot XYZ3050分配プラットフォームを用いてニトロセルロース(第1分析部による種類と寸法)上10mmの位置に1μl/cmでプロットし、第1分析部用の単一の検出ゾーンを提供した。
PBSAバッファー中2mg/mlのヤギ抗ウサギ抗体(Lampire)を第2分析部に使用したものと同じニトロセルロース上にBiodot XYZ3050分配プラットフォームを用いて13mmの位置に1μl/cmでプロットし、分析デバイス用の単一の対照ゾーンを提供した。
10 デバイス
11 ケーシング
12 多孔質サンプル受容器
15 LCDディスプレイ
20、40 分析デバイス
21 サンプル添加領域
22 第1分析部
23 第2分析部
24、25、26、27 ゾーン
31、41、45 LED
42、46 ストリップ
47、56 分割器
48、53 傾斜部材
49 表面
54 LEDバッフル
57 軸
61 試験ストリップ
62 アパーチャ
63 位置決めピン
Claims (28)
- 液体サンプル中の1種以上の分析物の存在および/または量を決定するための分析デバイスであって、
(a)各々が、標識付き結合剤を固定化するための検出ゾーンを有する流路を含み、1つまたは両方の検出ゾーンでの標識付き結合剤の検出が1種以上の分析物の存在および/または量を示す、第1および第2分析部と、
(b)共有参照ゾーンであって、共有参照ゾーンから得られる信号が、各検出ゾーンから得られる信号の値を補償するため、すなわち、発生し得る信号のバックグラウンド読み取りにおける変動を可能にするために用いられる、該共有参照ゾーンと、
(c)各検出ゾーンおよび参照ゾーンを照明するための1つ以上の光源と、
(d)各検出ゾーンおよび参照ゾーンからの光を検出するための1つ以上の光検出器であって、大きさが検出された光の量に関連する信号を発生する、該光検出器と、
(e)光検出器からの信号を処理するための信号処理手段とを含む、前記分析デバイス。 - 第1および/または第2分析部が、デバイスの使用の前に乾燥状態で検出ゾーンの上流に移動可能な形で提供される分析物または類似分析物用の標識付き結合剤を含む、請求項1に記載の分析デバイス。
- 第1および/または第2分析部が、検出ゾーンで固定化された形で提供される分析物用結合剤または標識付き結合剤を含む、請求項1または2に記載の分析デバイス。
- 共有参照ゾーンが第1または第2分析部のいずれかの部分として含まれる、請求項1から3のいずれか一項に記載の分析デバイス。
- 分析が正しく行われたこと、すなわち、流体サンプルがデバイスに供給されて標識付き結合剤が流路に沿って移動したことを示す、共有対照ゾーンをさらに含む、請求項1から4のいずれか一項に記載の分析デバイス。
- 対照ゾーンが第1または第2分析部のいずれかの部分として含まれる、請求項5に記載の分析デバイス。
- 対照ゾーンが1つの分析部の部分として含まれ、共有参照ゾーンが他の分析部の部分として含まれる、請求項5または6に記載の分析デバイス。
- 第1および第2分析部が異なる濃度範囲の分析物の存在を検出することができる、請求項1から7のいずれか一項に記載の分析デバイス。
- 第1および第2分析部の流路が各々多孔質担体を含む、請求項1から8のいずれか一項に記載の分析デバイス。
- 多孔質担体がニトロセルロースを含む、請求項9に記載の分析デバイス。
- 第1および第2分析部の上流に提供された単一の多孔質サンプル受容器を含む、請求項1から10のいずれか一項に記載の分析デバイス。
- 分析流路の末端部に提供されたシンクをさらに含む、請求項1から11のいずれか一項に記載の分析デバイス。
- 第1および第2分析部が各々異なる量の標識付き結合剤を含む、請求項1から12のいずれか一項に記載の分析デバイス。
- 低い範囲の分析物の検出用の第1分析部および高い範囲の分析物の検出用の第2分析部を含む、請求項1から13のいずれか一項に記載の分析デバイス。
- 第2分析部が第1分析部よりも多量の標識付き結合剤を有する、請求項14に記載の分析デバイス。
- 第1分析部が検出ゾーンの上流に提供された分析物用の標識付き結合剤を含み、第2分析部が検出ゾーンの上流に提供された分析物用の標識付き結合剤と、分析物用の第2結合剤とを含む、請求項1から15のいずれか一項に記載の分析デバイス。
- 第1分析部が共有参照ゾーンを含み、第2分析部が共有対照ゾーンを含む、請求項15および16に記載の分析デバイス。
- 参照ゾーンが検出ゾーンの下流に提供される、請求項17に記載の分析デバイス。
- 対照ゾーンが検出ゾーンの下流に提供される、請求項17および18に記載の分析デバイス。
- 光検出器が複数のゾーンからの光を検出する、請求項1から19のいずれか一項に記載の分析デバイス。
- 2つの検出ゾーン、参照ゾーン、および対照ゾーンからの光を検出する単一の光検出器を含む、請求項4から20に記載の分析デバイス。
- 2つの検出ゾーン、参照ゾーン、および対照ゾーンを照明する4つの光源を含む、請求項4から21に記載の分析デバイス。
- 光検出器によって検出された検出ゾーンおよび参照ゾーンからの光の量が分析デバイスにサンプルを添加する前および分析デバイスにサンプルが添加された後に再び測定され、2つの測定の比が各ゾーンについて計算される、請求項1から22のいずれか一項に記載の分析デバイス。
- 正規化された相対減衰パーセント(%A)が、検出および/または対照ゾーンについて計算され、
HSt(%A)=[(参照比t−HS試験比t)/参照比t]×100%
LSt(%A)=[(参照比t−LS試験比t)/参照比t]×100%
Ctrlt(%A)=[(参照比t−対照比t)/参照比t]×100%
である、請求項20に記載の分析デバイス。 - 光源が1つ以上のLEDを含む、請求項1から24のいずれか一項に記載の分析デバイス。
- 決定される分析物がhCGである、請求項1から25のいずれか一項に記載の分析デバイス。
- 液体サンプルが尿である、請求項1から26のいずれか一項に記載の分析デバイス。
- 液体サンプル中の分析物の存在および/または量を決定するために分析を行う方法であって、方法がサンプルを請求項1から27のいずれか一項に記載の分析デバイスに接触させるステップを含む、方法。
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- 2008-08-19 CA CA2638861A patent/CA2638861C/en active Active
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HK1167715A1 (zh) | 2012-12-07 |
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AU2008207371B2 (en) | 2014-05-22 |
CA2638861A1 (en) | 2009-03-01 |
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US20090061534A1 (en) | 2009-03-05 |
US7879624B2 (en) | 2011-02-01 |
BRPI0804853A2 (pt) | 2009-09-29 |
NZ570601A (en) | 2009-11-27 |
US20120015448A1 (en) | 2012-01-19 |
US20160123977A1 (en) | 2016-05-05 |
EP2469269B1 (en) | 2016-03-30 |
GB2454296A (en) | 2009-05-06 |
DE102008045070A1 (de) | 2009-03-05 |
EP2031376B1 (en) | 2016-03-16 |
BRPI0804853B1 (pt) | 2017-11-28 |
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