JP6886668B2 - 医療用検査装置及び細胞検査方法 - Google Patents
医療用検査装置及び細胞検査方法 Download PDFInfo
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- JP6886668B2 JP6886668B2 JP2019082075A JP2019082075A JP6886668B2 JP 6886668 B2 JP6886668 B2 JP 6886668B2 JP 2019082075 A JP2019082075 A JP 2019082075A JP 2019082075 A JP2019082075 A JP 2019082075A JP 6886668 B2 JP6886668 B2 JP 6886668B2
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- XZLXGTUBUCMRCH-UHFFFAOYSA-N tungsten zinc Chemical compound [Zn].[W] XZLXGTUBUCMRCH-UHFFFAOYSA-N 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Description
前記分離液の密度が1.060〜1.115g/mLであることが好ましい。
本発明は、ウェル部を有する医療用検査装置であって、前記ウェル部の内面の少なくとも一部に親水性シラン化合物層が形成されている医療用検査装置である。前記医療用検査装置は、前記親水性シラン化合物層にフィブロネクチンが吸着されていることが好ましい。
医療用検査装置としては、マルチウェルプレート(図1−1(a))、スライドチャンバー(図1−2(b))、シングルウェル(シャーレ、(図1−2(c)))等を用いた装置が挙げられ、がん細胞、幹細胞等の特定細胞を捕捉する目的で使用できる。
R11 kSi(OR12)4−k (1)
(式中、各々のR11、R12は、同一若しくは異なって、炭素数1〜8の飽和又は不飽和炭化水素基を表し、R11とR12は同一の基でも異なる基でもよい。kは0〜3の整数を表す。)
なかでも、2個以上のアルコキシ基を有する化合物が好ましく、3個以上のアルコキシ基を有する化合物がより好ましい。
(R21O)mSi(OR22)n (2)
(式中、R21及びR22は、同一若しくは異なって、炭素数1〜8の飽和又は不飽和炭
化水素基を表す。平均値として、m+n=4、m≧n≧0である。)
式(2−1)
(H3C−CH2−CH2−CH2−O−)m−Si−(O−CH2−CH3)n
(式中、平均値として、m+n=4、m>n>0である。)
式(I)において、nは、1〜3が好ましく、2〜3がより好ましい。
なお、式(I)において、R11、R12、R13、X11、X12の置換基は、特に限定されず、水酸基などの官能基が挙げられる。
(1)、(2)の保持時間は、ウェル11の大きさ、導入する液種、等により適宜設定すれば良いが、5分〜10時間が好ましく、10分〜5時間がより好ましく、15分〜2時間が更に好ましい。保持後、適宜、余分な親水性シラン化合物溶液・分散液を排出し、乾燥してもよい。
本発明の細胞検査方法は、前述の医療用検査装置を用いて、血液又は体液中の細胞を調べる細胞検査方法である。前記のとおり、本発明の医療用検査装置は、がん細胞、幹細胞等の特定細胞の捕捉性が向上すると共に、血小板等の捕捉性が低下し、特定細胞の選択的な捕捉効果が得られるため、これを用いて血液又は体液中の細胞を調べることで、前述のがん治療効果の確認、体の外での抗がん剤等の効き目の確認、抗がん剤等の選定、等が期待できる。
なお、水の接触角は、容器の内表面に蒸留水2μlを滴下し、30秒後の接触角をθ/2法(室温)で測定することで測定できる。
遠心分離は、遠心力200〜3000G(×G)の条件下で実施することが好ましい。200G以上であると、血球細胞の分離が良くなると同時に、特定細胞のロス(赤血球等と同じ分画に入るなどによるロス)が減るため、特定細胞の選択的な捕捉効果を奏する。一方、3000G以下であると、特定細胞へのストレスが抑制され、本来の細胞の性質が維持される。より好ましくは300〜2800G、更に好ましくは400〜2500Gである。
Gelest社製の「SIM6492.7」(2−[メトキシ(ポリエチレンオキシ)プロピル]トリメトキシシラン、CH3O−(CH2CH2O)6−9−(CH2)3Si(OCH3)3)の水/メタノール(50質量%/50質量%)の0.25質量%溶液を作製した。
スランドチャンバー(スライドガラス部:ソーダ石灰ガラス、チャンバーサイズ:20mm×20mm)に、前記溶液を100μl注入して、室温で静置した(17時間)。その後、50℃6時間で真空乾燥した後、水で洗浄することで、親水性シラン化合物層が形成された検査装置を作製した。
Gelest社製の「SIM6492.7」をGelest社製の「SIM6492.72」(2−[メトキシ(ポリエチレンオキシ)プロピル]トリメトキシシラン、CH3O−(CH2CH2O)9−12−(CH2)3Si(OCH3)3)に変更した以外は、実施例1と同様に検査装置を作製した。
Gelest社製の「SIM6492.7」をGelest社製の「SIM6492.73」(2−[メトキシ(ポリエチレンオキシ)プロピル]トリメトキシシラン、CH3O−(CH2CH2O)21−24−(CH2)3Si(OCH3)3)に変更した以外は、実施例1と同様に検査装置を作製した。
Gelest社製の「SIM6492.7」をGelest社製の「SIM6493.4」(メトキシトリエチレンオキシプロピルトリメトキシシラン、CH3O−(CH2CH2O)3−(CH2)3Si(OCH3)3)に変更した以外は、実施例1と同様に検査装置を作製した。
Gelest社製の「SIM6492.7」をGelest社製の「SIM6493.7」(メトキシトリエチレンオキシウンデシルトリメトキシシラン、CH3O−(CH2CH2O)3−(CH2)11Si(OCH3)3)に変更した以外は、実施例1と同様に検査装置を作製した。
Gelest社製の「SIM6492.7」(2−[メトキシ(ポリエチレンオキシ)プロピル]トリメトキシシラン、CH3O−(CH2CH2O)6−9−(CH2)3Si(OCH3)3)の水/メタノール(50質量%/50質量%)の0.25質量%溶液を作製した。
スランドチャンバー(スライドガラス部:ソーダ石灰ガラス、チャンバーサイズ:20mm×20mm)に、前記溶液を100μl注入して、室温で静置した(17時間)。その後、50℃6時間で真空乾燥した後、水で洗浄することで、親水性シラン化合物層が形成された。
更に、形成した親水性シラン化合物層の表面に、フィブロネクチンを吸着させた。具体的にはフィブロネクチンのPBS溶液(リン酸緩衝生理食塩水)200μg/mlを作製し、40℃1時間放置した後、PBS溶液で洗浄することで検査装置を作製した。
スランドチャンバー(スライドガラス部:ソーダ石灰ガラス、チャンバーサイズ:20mm×20mm)を使用した(未処理)。
ウェル内面の親水性シラン化合物層の膜厚は、TEMを使用し、加速電圧15kV、1000倍で測定(撮影)した。
染色をしたヒト結腸癌由来上皮細胞(HT−29)を全血に100個/血液1mLになる様に懸濁させた(スパイク血)。これに等量の液体培地を入れて希釈した(希釈スパイク血)。次に15mLの遠心分離管に、分離液(LymphoPrep:密度1.077±0.001g/mL)を入れて、その上に上記希釈スパイク血を入れて、800G20分(室温:23℃)の条件で遠心分離を行った。そして単核球層を分離した。分離した単核球層にリン酸バッファー(PBS)溶液を添加して、遠心分離を再度行い、濃縮を行った。遠心分離後の最下層にできた塊をFBS(ウシ胎児血清)10%添加液体培地(最初の全血量と同じ液量)で懸濁させた。この懸濁液を用いて、スライドチャンバーに1mlずつ注入し、37℃で1時間接着させた。その後、PBS溶液で未接着の細胞を洗浄した。次いで、蛍光顕微鏡で接着したがん細胞数をカウントトした。なお、比較例1の接着数を100として、相対値で比較した。
2 スライドチャンバー
3 シングルウェル(シャーレ)
11 ウェル
21 親水性シラン化合物層
31 フィブロネクチン
Claims (10)
- 前記mが、1〜25を表す請求項1又は2記載の医療用検査装置。
- 前記親水性シラン化合物層にフィブロネクチンが吸着されている請求項1〜3のいずれかに記載の医療用検査装置。
- 前記親水性シラン化合物層の膜厚が、1〜30nmである請求項1〜4のいずれかに記載の医療用検査装置。
- 請求項1〜5のいずれかに記載の医療用検査装置を用いて、血液又は体液中の細胞を調べる細胞検査方法。
- 血液又は体液を遠心分離により分画して前記血液又は前記体液中に含まれる特定細胞を回収し、次いで、前記医療用検査装置を用いて、得られた回収液中に含まれる特定細胞を親水性シラン化合物層に捕捉し、前記特定細胞を調べる請求項6記載の細胞検査方法。
- 前記遠心分離時に分離液を用いて分画する請求項7記載の細胞検査方法。
- 前記分離液の密度が1.060〜1.115g/mLである請求項8記載の細胞検査方法。
- 前記遠心分離に用いる容器は、内表面の少なくとも一部の水の接触角が30度以下である請求項7〜9のいずれかに記載の細胞検査方法。
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