JP5733986B2 - 細胞の付着、培養、及び剥離のための方法、表面改質されたプレート、並びに組成物 - Google Patents
細胞の付着、培養、及び剥離のための方法、表面改質されたプレート、並びに組成物 Download PDFInfo
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Description
別の例として、Sidhuら(Stem Cells Dev.15:61〜69,2006)は、フローサイトメトリーによる単一細胞調製物の選別によって親細胞株hES3から誘導された3つのヒトES細胞クローンhES3.1、3.2、及び3.3について最初に報告している。
a.細胞の懸濁液を得る工程と、
b.細胞の懸濁液を、Rhoキナーゼ活性の阻害能を有する化合物、及びRho活性の阻害能を有する化合物からなる群から選択される少なくとも1つの化合物で処理する工程と、
c.細胞の懸濁液を表面に加えて細胞を付着させる工程と、を含む方法を提供する。
a.細胞の懸濁液を得る工程と、
b.細胞の懸濁液を表面に加えて細胞を付着させる工程と、を含む方法を提供する。
本明細書で言うところの「吸着層」とは、共有結合(グラフトとしても知られる)又は非共有結合(吸着としても知られる)によって固体基質の表面上に分子を付着させることによって表面上に形成された層を指して言う。吸着層の形成に用いられる分子は、例えば細胞外マトリクスタンパク質、アミノ酸などを含むタンパク性分子、及び例えばポリエチレンイミンなどの非生体分子であってよい。
a.細胞の懸濁液を得る工程と、
b.細胞の懸濁液を表面に加えて細胞を付着させる工程と、を含む方法を提供する。
a.細胞の懸濁液を得る工程と、
b.細胞の懸濁液を、Rhoキナーゼ活性の阻害能を有する化合物、及びRho活性の阻害能を有する化合物からなる群から選択される少なくとも1つの化合物で処理する工程と、
c.細胞の懸濁液を表面に加えて細胞を付着させる工程と、を含む方法を提供する。
本発明における使用に適した表面改質プレートは、その表面が少なくとも約0.5%の窒素を含有し、酸素と窒素の合計量が17.2%以上であり、接触角が少なくとも約13.9°であるように改質された容器であってよい。また、例えばこの表面は細胞が付着できる多孔質の足場のような3次元のマトリクスであってもよい。
一実施形態では、表面改質プレートの表面の元素組成は、X線光電子分光法(XPS)によって分析することができる。XPSは、化学分析用電子分光法(Electron Spectroscopy for Chemical Analysis(ESCA))としても知られ、固体基質の表面にどのような元素又は原子が存在するかを調べ(水素及びヘリウムを除き、0.1原子%未満の濃度のすべての元素を検出可能)、こうした元素又は原子の結合環境を調べるための方法として用いられる。一例として、ポリスチレン(炭素と水素のみを含む)固体試料のXPS分析により、通常、97%よりも多い炭素、3%未満の酸素、及び0%の窒素という結果が得られる(水素は検出されない。例えば放射線照射による滅菌の結果として表面のポリスチレン鎖の酸化のために異なる濃度の酸素が検出されうる。)(Brevig et al.,Biomaterials 26:3039〜3053,2005;Shen and Horbett,J.Biomed.Mater.Res.57:336〜345,2001)。
多能性幹細胞の特性評価
多能性幹細胞は、発生段階特異的胚性抗原(SSEA)3及び4の1つ以上、及びTra−1−60及びTra−1−81と呼ばれる抗体を用いて検出可能なマーカーを発現しうる(Thomson et al.,Science 282:1145,1998)。インビトロで多能性幹細胞を分化させると、SSEA−4、Tra−1−60、及びTra−1−81の発現が消失し(存在する場合)、SSEA−1の発現が増大する。未分化の多能性幹細胞は通常アルカリホスファターゼ活性を有し、これは、細胞を4%パラホルムアルデヒドで固定し、次いで製造業者(Vector Laboratories,Burlingame Calif.)によって述べられるようにVectorRedを基質として現像することによって検出することができる。未分化の多能性幹細胞は、RT−PCRによって検出されるOct−4及びTERTを通常更に発現している。
使用が可能な多能性幹細胞の種類としては、妊娠期間中の任意の時期(必ずしもではないが、通常は妊娠約10〜12週よりも前)に採取した前胚性組織(例えば胚盤胞等)、胚性組織、胎児組織等の、妊娠後に形成される組織に由来する多能性細胞の株化細胞系が含まれる。非限定的な例としては、例えばヒトES細胞株H1、H7及びH9(WiCell)等のヒトES細胞又はヒト胚性生殖細胞の株化細胞系がある。更に、こうした細胞の初期の株化又は安定化の際に本開示の組成物を使用することも考えられるが、その場合は、供給源となる細胞は供給源組織から直接採取される1次多能性細胞である。フィーダー細胞の非存在下で既に培養された多能性幹細胞集団から得られる細胞も、フィーダー細胞の存在下で既に培養された多能性幹細胞集団と同様、好適である。例えば、BG01v(BresaGen,Athens,GA)等の変異型ヒトES細胞株も好適である。例えば、Takahashiら(Cell 131:1〜12(2007))によって開示される細胞のような成人ヒト体細胞から誘導される細胞も好適である。
一実施形態では、多能性幹細胞を、本発明の方法にしたがって培養するのに先立って、様々な点で多能性幹細胞を支持するフィーダー細胞又は細胞外マトリクスタンパク質の層上で培養する。例えば、多能性幹細胞を、細胞を大きく分化させることなく多能性幹細胞の増殖を支持するフィーダー細胞層上で培養する。フィーダー細胞層上での分化をともなわない多能性幹細胞の増殖は、(i)フィーダー細胞層を含んだ培養容器を得て、(ii)別の細胞型と予め培養することによって調整した培地、又は、例えば無血清又は更には化学合成培地などの非条件培地を用いることで支持される。
本発明の一実施形態では、多能性幹細胞をその多能性を維持しつつ培養中で増殖させる。細胞の多能性の時間による変化を、多能性に関連したマーカーの発現レベルの変化を検出することによって調べることができる。また、多能性の変化を、分化に関連したマーカー又は別の細胞型に関連したマーカーの発現レベルの変化を検出することによって監視することもできる。
ヒト胚性幹細胞の細胞塊としての継代及び維持
ヒトES細胞株H1及びH9をマイトマイシンCで不活化した初代マウス胚線維芽細胞(MEF)上で最初に維持した。このヒトES細胞をMEFフィーダーからMatrigel(商標)(Becton−Dickinson,Bedford,MA)に切り換えて繰り返し継代を行った。
ヒト胚性幹細胞の単一細胞としての継代
細胞株H9のヒトES細胞をLifeScan Inc.に譲渡された米国特許出願LFS5163USPSPに開示される方法にしたがって単一細胞として増殖させた。細胞をTrypLE(商標)Expressで37℃で5分間処理することによって継代し、基質表面1cm2当たり10,000個の細胞となるように播種した。
細胞外マトリクスタンパク質/成分及びフィーダー細胞を欠いた表面改質プレートを用いたヒト胚性幹細胞の付着、培養及び多能性の維持
継代数49の細胞株H1のヒトES細胞を、実験前に希釈率1:30の増殖因子低減Matrigel(商標)で処理したNunclon Delta(商標)プレート上でMEF調整培地中に維持した。細胞を1mg/mLのコラゲナーゼ解離処理、又は手による掻き落としによって継代のために表面から解離させた。
細胞外マトリクスタンパク質/成分及びフィーダー細胞を欠いた表面改質プレート上でのヒト胚性幹細胞の付着、培養及び多能性の維持:Rho阻害及びRhoキナーゼ阻害の影響
継代数49の細胞株H1のヒトES細胞を、実験前に希釈率1:30の増殖因子低減Matrigel(商標)で処理したNunclon Delta(商標)プレート上でMEF調整培地中に維持した。細胞を1mg/mLのコラゲナーゼ解離処理によって継代のために表面から解離させた。
Rhoキナーゼ阻害を介したヒト胚性幹細胞の付着及び剥離
継代数40のH9株のヒトES細胞を、実験前に希釈率1:30の増殖因子低減Matrigel(商標)で処理したNunclon Delta(商標)プレート上でMEF調整培地中に維持した。細胞を1mg/mLのコラゲナーゼ解離処理、又は手による掻き落としによって継代のために表面から解離させた。
表面改質プレート上でTrypLE(商標)Expressにより継代したH9ヒトES細胞は、Y−27632による接着性が向上する。
表面改質プレート上でTrypLE(商標)Expressとともに継代したH9単一ヒト胚性幹細胞は多能性を維持する。
Rhoキナーゼ阻害は、表面改質プレート上で単一細胞として増殖させたヒト胚性幹細胞株H9からの細胞のMatrigel(商標)からの移行時の接着及び増殖を促進する。
表面改質プレートを使用して化合物をスクリーニングすることができる。
表面改質プレート上で培養した単一胚性幹細胞は胚体内胚葉への分化能を有する。
表面改質プレート上で培養した単一胚性幹細胞は膵臓内胚葉への分化能を有する。
H1及びH9ヒトES細胞は表面改質プレートに接着し、接着性は細胞をY−27632で処理することによって向上する。
ヒト胚性幹細胞株H1及びH9からの細胞はY−27632の存在下で表面改質プレート上に異なる速度で付着し、コロニーを形成する。
合成培地を用いた表面改質プレートへのヒトES細胞の付着
継代数49のH9ヒトES細胞を、Matrigel(商標)処理したプラスチック容器上で合成培地であるmTeSR(商標)中で2回継代した。次いで細胞をリベラーゼ処理し、mTeSR(商標)培地中、表面改質プレートであるNunc4上に播種した。細胞は20μMのY−27632の存在下又は非存在下で培地に播種した。細胞を播種する30分前に各ウェルを異なるタンパク質(非処理、0.1%ゼラチン、2%BSA、0.34mg/mLのラットコラーゲンI、1:1000のMatrigel(商標)、又は1:5000のMatrigel(商標))で更に処理することによってこれらのタンパク質がY−27632の存在下又は非存在下で合成培地中でヒトES細胞の接着性を促進するか否かを調べた(図28)。我々は、Y−27632の非存在下では、合成培地中で表面改質プレート上に播種されたヒトES細胞は、コラーゲンI又は1:1000のMatrigel(商標)などの細胞外マトリクスタンパク質の存在下であっても付着しないことを観察した。しかしながら、20μMのY−27632を合成培地であるmTeSR(商標)培地に加えた場合には、ヒトES細胞は表面Nunc4に接着した。更に、この接着性は非処理のウェルと、0.1%ゼラチン、2%BSA、及び0.34mg/mLのラットコラーゲンIで処理したウェルとで同等であった。低濃度のMatrigel(商標)(希釈率1:1000及び1:5000)を用いたウェルではヒトES細胞の付着性にある程度の増大が認められたが、これらの濃度のMatrigel(商標)はY−27632の非存在下で接着性を促進するには不充分であった。これらの結果は、ROCK阻害剤であるY−27632の存在下では、ヒトES細胞を合成培地中で改質されたプラスチック基質上で培養することが可能であり、約1:1000又は1:5000の低濃度のMatrigel(商標)がこの接着性を高めうることを示すものである。
フラスコ形式の表面改質プレートはヒトES細胞の付着並びに胚体内胚葉及び膵臓内胚葉への分化を促進しうる。
表面処理及び表面改質プレート
コロナプラズマ処理又はマイクロ波プラズマ処理を用いて射出成形された成形物を処理することによって表面改質プレートを作製した(表6)。射出成形に用いたポリマー材料は、ポリスチレン、ポリカーボネート、ポリカーボネートとポリスチレンとの配合物、及び環状オレフィンコポリマーであった。これらの表面改質プレートを個別にプラスチックバッグに入れ、γ線照射(25kGy)によって滅菌し、最後に細胞培養又は表面の特性評価を行う実験で使用するまで室温で保存した。表面改質プレート18、30及び31〜32は、それぞれ表面改質プレート19、33及び34と同じポリマー材料を用いて成形したがプラズマ処理は行わなかった。表面14及び31はγ線照射を行わなかった。
本発明の表面改質プレートの表面の特性評価
水接触角
表面改質プレート1〜4及び13を個別にプラスチックバッグに入れ、滅菌し、試験期間全体を通じて室温で保存した。接触角を表面処理及び滅菌1週間後に最初に測定し、図29に示した各時点で再び測定した。すべての接触角の測定は、静的固着液滴法及びFIBRO Systems AB,Swedenより販売されるPG−X測定ヘッド(ビデオカメラとコンピューターソフトウェア(v.3.1)からなる角度計)を用いて行った。接触角の計算には接線法(tangent leaning method)を用いた。4.0μLのMilliQ水の水滴を、自動液滴塗布装置を製造者の指示にしたがって静止モードで使用して付着させた。各水滴の接触角を1回ずつ測定した(各試料にそれぞれの時点で7滴を付着させた)。前の測定からの影響を防止するために各時点で新しい試料を使用した。Nuclon Delta(商標)及びCellBIND(商標)表面上での測定は、表面1〜4及び13上での測定と同じ実験条件下で行ったが、表面処理及び滅菌は最初の測定の12週間よりも前に行った(Nunclon Delta(商標)*は最初の測定の1週間前に滅菌した)。図29は、表面改質プレート1〜4及び13は同様の親水性を有し、Nuclon Delta(商標)及びCellBIND(商標)表面よりも親水性が高い(水接触角がより小さい)ことを示している。表面改質プレート1〜4及び13の親水性は、表面処理及び滅菌後少なくとも12週間にわたって安定であった。
表面改質プレート1〜4及び13、Nunclon Delta(商標)表面、CellBIND(商標)表面、Primaria(商標)表面、Falcon(商標)表面、並びに非処理(ただし滅菌した)ポリスチレン表面(いずれも3cm径の培養皿形式)上の負電荷の密度を調べた。3mLのクリスタルバイオレット水溶液(0.015%w/v)を各培養皿に入れ、培養皿を静かに震盪(50rpm)しながら室温で60分インキュベートした。表面に結合しなかったクリスタルバイオレットを除去するため、培養皿を3mLのMilliQ水で3回洗浄した後、60℃で一晩乾燥させた。表面に結合したクリスタルバイオレットは1.5mLの0.1M塩酸/エタノール溶液(99%)を加え、培養皿を静かに震盪しながら(50rpm)室温で2分間インキュベートすることによって脱着させた。脱着されたクリスタルバイオレットを含む塩酸/エタノール溶液の吸光度をEnVision2100マイクロプレートリーダー(Perkin Elmer;Waltham,MA,USA)を用いて590nmにて測定した。吸光度の値は塩酸/エタノール溶液のバックグラウンド吸光度に対して補正した。負電荷の密度を1つの表面につき3個の培養皿で測定し、吸光度の測定を各培養皿について3重に行った。
表面改質プレート1〜4及び13〜15、並びにNunclon Delta(商標)、Costar(商標)、Falcon(商標)、CellBIND(商標)及びPrimaria(商標)表面を有するプレートをXPS法を用いて分析した。各プレートから切片を切断し、これをステンレス鋼の試料ホルダー上にバネクリップにより装着することによってX線源に曝した。各試料にAl kα線(1486eV)を照射した。試料と分析機との間の角度を45°として分析を行った。スペクトルは機器の販売者であるPhysical Electronicsによって提供されるソフトウェアパッケージを使用してカーブフィットした。このソフトウェアは市販のMatlab(商標)ルーチンを利用してデータ処理を行うものである。分析で使用した機器はPhysical Electronicsモデル5400X腺光電子分光計である。各プレートの表面処理した部分の直径約1mmの領域において最も外側の深さ2〜5nmを、1つの表面につき2個のプレートのそれぞれで分析した。
表面改質プレート1〜4及び13、並びにNunclon Delta(商標)及びCellBIND(商標)表面を有するプレートをAFMを用いて分析した。試料は、Digital Instruments製マルチモード原子間力顕微鏡をタッピングモードで使用して分析した。使用した先端部はタッピングモード先端部(タイプTESP7)である。試料は両面粘着テープで試料ディスクに取り付けた。各プレートの表面処理した部分の10μm×10μm及び500nm×500nmの領域を分析した。ナノメートルの単位で表わした表面の平均粗さ(Ra)及び最大高さ(Rmax)を表10に示す。Nunclon Delta(商標)及びCellBIND(商標)表面を有するプレートと同様、表面改質プレート1〜4及び13は比較的平滑であり、Ra及びRmaxは2回の走査のいずれにおいても表面処理時間との相関は見られなかった。細胞培養を目的とした非処理のポリスチレン及び酸化ポリスチレン表面、並びにPrimaria(商標)表面の分析についてはShen及びHorbett(J.Biomed.Mater.Res.57:336〜345,2001)によって述べられている(3つの表面すべてで表面粗さは約4nm)。
ヒトES細胞の付着及びコロニー形成に関連しての表面の元素組成及び接触角
表面の元素組成のXPS分析、表面接触角の測定、及びヒトES細胞の付着及びコロニー形成実験の結果の概要を表11に示す。
Y−27632による処理は表面改質プレートへのHEK293細胞の付着を促進する。
Y−27632及びH−1152による処理は、表面改質プレート上でのHEK293細胞の増殖を促進する。
H−1152による処理は表面改質プレートへのHEK293細胞の増殖及び付着を促進する。
Y−27632による処理は、表面改質プレート上で3回の継代にわたってHEK293細胞の増殖を促進する。
細胞外マトリクスタンパク質/成分及びフィーダー細胞を欠いた表面改質プレート4、18、及び19を用いたヒト胚性幹細胞の付着、培養及び維持
1:30のMATRIGELでコーティングしたプラスチック容器上、8ng/mLのbFGFを添加したMEF調整培地中で維持した継代数42のH1 hES細胞をLIBERASE(商標)酵素処理によって浮かせ、8ng/mLのbFGFを添加したMEF調整培地中、1:2の希釈率で表面改質された96ウェル形式のプレートに播種した。細胞は改質表面4、18若しくは19、又はPrimaria(商標)上に播種した。改質表面への結合に対するRhoキナーゼ阻害の影響を調べるため、10μMのRhoキナーゼ阻害剤Y−27632、又は3μM若しくは10μMのRhoキナーゼ阻害剤H−1152グリシルのいずれかで細胞を処理した。非処理の細胞をコントロールとした。24時間の培養後、各ウェルを吸引し、細胞を乾燥して、各ウェルをクリスタルバイオレットで染色した。
細胞外マトリクスタンパク質/成分及びフィーダー細胞を欠いた表面改質プレート30、31、32、33及び34を用いたヒト胚性幹細胞の付着、培養及び維持
1:30のMATRIGELでコーティングしたプラスチック容器上、8ng/mLのbFGFを添加したMEF調整培地中で維持した継代数47のH1 hES細胞をTrypLE(商標)酵素処理によって浮かせ、8ng/mLのbFGFを添加したMEF調整培地中、1:3の希釈率で表面改質された96ウェル形式のプレートに播種した。細胞は改質表面30、31、32、33又は34に播種した。改質表面への結合に対するRhoキナーゼ阻害の影響を調べるため、3μMのRhoキナーゼ阻害剤H−1152グリシルで細胞を処理した。非処理の細胞をコントロールとした。更に、細胞を、Matrigel(商標)で前処理した表面改質プレートのウェルに播種した。播種24時間後、培地を8ng/mLのbFGFを添加した新鮮なMEF調整培地に交換し、Rhoキナーゼ阻害剤の存在下で播種した細胞については培地に3μMのH−1152グリシルを添加した。48時間の培養後、各ウェルを吸引し、細胞を乾燥して、各ウェルをクリスタルバイオレットで染色した。
細胞外マトリクスタンパク質/成分及びフィーダー細胞を欠いた表面改質プレート22、23、24又は29を用いたヒト胚性幹細胞の付着、培養及び維持
1:30のMATRIGELでコーティングしたプラスチック容器上、8ng/mLのbFGFを添加したMEF調整培地中で維持した継代数46のH1 hES細胞をLiberase(商標)酵素処理によって浮かせ、8ng/mLのbFGFを添加したMEF調整培地中、1:3の希釈率で表面改質された60mm径の培養皿に播種した。細胞は表面改質プレート3、4、22、23、24及び29に播種した。改質表面への結合に対するRhoキナーゼ阻害の影響を調べるため、3μMのRhoキナーゼ阻害剤H−1152グリシルで細胞を処理することによって細胞を播種した。細胞の播種24時間後に、8ng/mLのbFGF及び1μMのRhoキナーゼ阻害剤H−1152グリシルを添加した新鮮なMEF調整培地に培地を交換した。改質表面3、4又はmatrigel(商標)コーティングしたプラスチックに播種された細胞をコントロールとした。各プレートを播種24時間及び48時間後に位相差顕微鏡によって観察した。我々は、48時間の培養後、Rhoキナーゼ阻害剤の存在下又は非存在下で播種したES細胞のコロニーは、表面改質プレート22、23、24又は29に付着しなかったが、Rhoキナーゼ阻害剤の存在下で表面改質プレート3又は4に播種した細胞は付着して増殖したことを観察した。
本発明の表面改質プレートの更なる表面特性評価
水接触角
表面改質プレート1〜4及び13を個別にプラスチックバッグに入れ、滅菌し、40週間の試験期間全体を通じて室温で保存した。接触角を表面処理及び滅菌の1週間後に最初に測定し、図41に示した各時点で再び測定した。すべての接触角の測定は実施例17で述べたのと同様にして行った。Nuclon Delta(商標)及びCellBIND(商標)表面上での測定は、表面1〜4及び13上での測定と同じ実験条件下で行ったが、表面処理及び滅菌は最初の測定の12週間よりも前に行った(Nuclon Delta(商標)*は最初の測定の1週間前に滅菌した)。図41は、表面改質プレート1〜4及び13は同様の親水性を有し、Nuclon Delta(商標)及びCellBIND(商標)表面よりも親水性が高い(水接触角がより小さい)ことを示している。表面改質プレート1〜4及び13の親水性は、表面処理及び滅菌後少なくとも41週間にわたって安定であった。
表面改質プレート5〜12(いずれも5cm径の培養皿形式)、18、19、30、32、33及び34(いずれもマイクロウェル形式)、表面改質プレート22〜24及び29(いずれも6cm径の培養皿形式)、並びにCellBIND(商標)表面(3cm径の培養皿形式)、Primaria(商標)表面(マルチディッシュ6形式)並びにNunclon Delta(商標)表面(3cm径の培養皿形式)上の負電荷の密度を調べた。過剰量のクリスタルバイオレット水溶液(0.015%w/v)を各形式に入れ(培養皿形式では0.34mL/cm2、及びマイクロウェル形式では0.13mL/cm2)、静かに震盪(50rpm)しながら室温で60分インキュベートした。表面に結合しなかったクリスタルバイオレットを除去するため、培養皿形式については培養皿を3mLのMilliQ水で3回洗浄し、マイクロウェル形式では350μlのMilliQ水で3回洗浄してから、60℃で一晩乾燥させた。表面に結合したクリスタルバイオレットは、0.17mL/cm2の0.1M塩酸/エタノール溶液(99%)を加え、培養皿を静かに震盪しながら(50rpm)室温で2分間インキュベートすることによって脱着させた。脱着されたクリスタルバイオレットを含む塩酸/エタノール溶液の吸光度をEnVision 2100マイクロプレートリーダー(Perkin Elmer;Waltham,MA,USA)を用いて590nmにて測定した。吸光度の値は塩酸/エタノール溶液のバックグラウンド吸光度に対して補正した。負電荷密度を、表面改質プレート5〜12、22〜24、29、CellBIND(商標)、Primaria(商標)、及びNunclon Delta(商標)について3個の培養皿で測定し、吸光度の測定を各培養皿について3重に行った。表面改質プレート18、19、30、32、33及び34については、1つの試料に3重の測定を行って試験した。
表面改質プレート5〜12、18、19、22〜24、29、30、31〜34を実施例17で述べたのと同様にしてXPSを用いて分析した。原子%の単位で表わした表面の元素組成を表12に示す。窒素を含有していなかった表面改質プレート31及び32(プラズマ処理していない)を除き、すべての表面が炭素、酸素、及び窒素を含有していた(水素はXPSでは検出されない)。表面改質プレート5〜12の酸素含量は表面改質プレート1〜4及び13よりも小さかったが、Costar(商標)、Falcon(商標)、及びNunclon Delta(商標)表面よりも大幅に大きかった(表7に示す)。表面改質プレート5〜12はマイクロ波プラズマ処理によって作製したものであるのに対して、表面改質プレート1〜4及び13はコロナプラズマ処理によって作製したものである。コロナプラズマ処理によって作製したが(表面改質プレート1〜4及び13の作製に用いた)ポリスチレン以外のポリマーから射出成形された表面改質プレート19、33及び34の酸素含量は、表面改質プレート1〜4及び13の酸素含量と同等であった。表面改質プレート22〜24の酸素含量は、表面改質プレート1〜4及び13よりも小さかった。表面改質プレート29の酸素含量は表面改質プレート1〜4及び13と同等であった。表面改質プレート5〜12、19、33及び34の窒素含量は表面改質プレート1〜4及び13よりも小さかったが、Costar(商標)、Falcon(商標)、及びNunclon Delta(商標)表面よりも大きかった(表7に示す)。表面改質プレート29の窒素含量は、Primaria(商標)表面を含む分析を行った他の表面よりも大幅に大きかった。
**官能基は1つの試料においてのみ特定された。
「+」、「++」、及び「+++」は、それぞれ、一部(10cm2につき15個以上のコロニー)、それよりも多い、及び最も多いヒトES細胞の付着及びコロニー形成を意味する。
「RI」は、Rhoキナーゼ阻害剤、「ND」は実験が行われなかったことを意味する。
「PS」はポリスチレンを意味し、「PC」はポリカーボネートを意味し、「PS/PC」はポリスチレンとポリカーボネートの配合物を意味し、「COC」は環状オレフィンコポリマーを意味し、「CP」はコロナプラズマを意味し、「MP」はマイクロ波プラズマを意味する。
*ヒトES細胞は付着し、約3回継代可能なコロニーに増殖した(その後増殖速度は自然に低下した)。
**ヒトES細胞は付着し、最初の継代前に自然に分化するコロニーに増殖した。
***ヒトES細胞は付着し、コロニーに増殖した(継代は試験しなかった)。
****分析に使用可能な試料は1つのみであった。
Claims (8)
- 少なくとも1.3%の窒素を含有し、酸素と窒素の合計量が24.9%以上であり、接触角が少なくとも20.7°であり、フィーダー細胞層を欠く表面への細胞の付着を促進するための方法であって、
a.前記細胞の懸濁液を得る工程と、
b.前記細胞の懸濁液を、Rhoキナーゼ活性の阻害能を有する化合物、及びRho活性の阻害能を有する化合物からなる群から選択される少なくとも1つの化合物で処理する工程と、
c.前記細胞の懸濁液を前記表面に加えて前記細胞を付着させる工程と、を含む方法。 - 前記表面が吸着層を有する、請求項1に記載の方法。
- 前記表面に前記細胞が付着した後に前記細胞が培養中に維持される、請求項1に記載の方法。
- 前記細胞が前記表面に付着した後に前記少なくとも1つの化合物が除去される、請求項3に記載の方法。
- 前記少なくとも1つの化合物を除去することによって前記細胞が前記表面から剥離される、請求項1に記載の方法。
- 前記細胞の懸濁液が細胞の塊の懸濁液である、請求項1に記載の方法。
- 前記細胞の懸濁液が単一細胞の懸濁液である、請求項1に記載の方法。
- 前記表面が容器又はマトリクスの一部である、請求項1に記載の方法。
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US10066203B2 (en) | 2018-09-04 |
KR20160023920A (ko) | 2016-03-03 |
CN105886459A (zh) | 2016-08-24 |
RU2010138801A (ru) | 2012-03-27 |
AU2009215516A1 (en) | 2009-08-27 |
CA2959401C (en) | 2021-12-07 |
CN102046779A (zh) | 2011-05-04 |
KR101597731B1 (ko) | 2016-02-26 |
KR102026622B1 (ko) | 2019-09-30 |
KR20170129293A (ko) | 2017-11-24 |
EP2254990B1 (en) | 2020-04-15 |
CA2715878A1 (en) | 2009-08-27 |
BRPI0908033A2 (pt) | 2015-08-04 |
WO2009105570A3 (en) | 2010-04-15 |
KR20190057164A (ko) | 2019-05-27 |
WO2009105570A2 (en) | 2009-08-27 |
AU2009215516B2 (en) | 2014-12-18 |
EP2254990A2 (en) | 2010-12-01 |
US20090215177A1 (en) | 2009-08-27 |
MX2010009251A (es) | 2010-11-25 |
CA2959401A1 (en) | 2009-08-27 |
US11001802B2 (en) | 2021-05-11 |
RU2551772C2 (ru) | 2015-05-27 |
BR122017025207B1 (pt) | 2021-03-16 |
KR20170001727A (ko) | 2017-01-04 |
JP2011512797A (ja) | 2011-04-28 |
US20190249138A1 (en) | 2019-08-15 |
KR101731474B1 (ko) | 2017-05-11 |
KR20100125311A (ko) | 2010-11-30 |
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