JP5916256B2 - 細胞培養のための合成組成物および被覆 - Google Patents
細胞培養のための合成組成物および被覆 Download PDFInfo
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- JP5916256B2 JP5916256B2 JP2014508877A JP2014508877A JP5916256B2 JP 5916256 B2 JP5916256 B2 JP 5916256B2 JP 2014508877 A JP2014508877 A JP 2014508877A JP 2014508877 A JP2014508877 A JP 2014508877A JP 5916256 B2 JP5916256 B2 JP 5916256B2
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Description
本出願は配列リストを含む。その配列リストに含まれる情報がここに引用される。
成分1は、ポリマー主鎖にコンジュゲートした架橋剤部分およびポリマー主鎖にコンジュゲートした陽イオン部分を有するプレポリマーである。この陽イオン部分は、細胞培養pH、例えば、7から7.7で正に帯電している。この架橋剤部分は、例えば、UV光などの電磁放射線に曝露された際に、成分1のプレポリマーを、成分2のペプチド含有ポリマー、およびいくつかの実施の形態において、細胞培養物品の表面に架橋させることができる。成分1のプレポリマーは、少なくとも1つの陽イオンモノマーおよび少なくとも1つの架橋剤含有モノマーの重合によって調製されることが好ましい。あるいは、陽イオン基または光反応性基が、反応性基を含むポリマー主鎖にコンジュゲートされてもよい。
架橋剤モノマー115を形成するために、または既存のポリマーにコンジュゲートするために、どのような適切な架橋剤部分110を使用してもよい。架橋剤部分110は、光反応性部分または熱反応性部分であってもよい。例えば、架橋剤部分は、α,β不飽和ケトン光反応性部分であってよい。光反応性基は、光に曝露された際に、非常に反応性である種を形成する分子または部分である。光反応性基の例としては、アリールアジド、ジアザレン、ベータカルボニルジアゾおよびベンゾフェノン、アセトフェノン、およびその誘導体が挙げられる。反応性種としては、ニトレン、カルベンなどが挙げられる。反応性種は、一般に、共有結合を形成できる。例えば、実施の形態において、感光性部分は、ベンゾフェノン含有部分、置換アリールアジド含有部分、またはトリフルオロメチルアリールジアジリン含有部分である。
陽イオンモノマー125を形成するために、または既存のポリマーにコンジュゲートするために、どのような適切な陽イオン部分120を使用してもよい。実施の形態において、陽イオン部分120は、第一級、第二級または第三級アミノ基などのアミン基を含む。陽イオン基は、親の第三級アミンの第四級化によって生成された第四級アミンであってもよい。様々な実施の形態において、陽イオン部分120は、一または二置換C1〜C4アルキルアミン、もしくは一または二置換C1〜C4アルカノールアミンなどの、第三級アルキルアミンまたは第三級アルカノールアミンである。
親水性モノマー135を形成するために、または既存のポリマーにコンジュゲートするために、どのような適切な親水性部分130を使用してもよい。親水性部分130またはモノマー135は、細胞培養pHで負に帯電していても、細胞培養pHで帯電していなくてもよい。多くの実施の形態において、親水性部分130またはモノマー135は細胞培養pHで帯電していない。成分1のプレポリマー100の電荷密度を調節するために、または結果として得られたポリマーにヒドロゲル挙動を与えるために、親水性部分130またはモノマー135を利用してもよい。
上述したように、成分1のプレポリマー100は、適切な部分をホモポリマーまたはコポリマーにコンジュゲートすること、またはモノマーにコンジュゲートした適切な部分を有するモノマーの混合物を重合することなどにより、どのような適切な様式で合成してもよい。
成分2は、ポリマー主鎖にコンジュゲートしたポリペプチドを有するポリマーである。このポリペプチドは、どのような適切な様式でポリマーにコンジュゲートしてもよい。いくつかの実施の形態において、モノマーは、ポリペプチドを含むように誘導体化されており、それゆえ、ポリペプチドは、ポリマーが形成されているときにポリマーに取り込まれる。いくつかの実施の形態において、ポリペプチドは、ポリマーが形成された後にポリマーにグラフトされる。
式1: Rm−Sp−Cap
により記載される。
陽イオンの架橋剤官能化プレポリマー(「成分1」)およびペプチド官能化ポリマー(「成分2」)は、どのような適切な量および比で被覆組成物において組み合わされてもよい。
成分1のプレポリマーおよび成分2のペプチドポリマーは、どのような適切な様式で細胞培養物品上に配置してもよい。一般に、先に記載したような、成分1のプレポリマーおよび成分2のペプチドポリマーを含有する溶液は、細胞培養物品の表面上に配置される。その溶液は、その物品の表面に吹き付けても、または物品の表面に注ぐなどしてもよい。いくつかの実施の形態において、その物品は、溶液に沈められ、そこから取り出される。
ここに記載された被覆は、6,12,96,384および1536ウェルプレートなどのシングルおよびマルチウェルプレート、瓶、ペトリ皿、フラスコ、ビーカー、プレート、ローラーボトル、区画および多区画培養スライドなどのスライド、試験管、カバースリップ、バッグ、膜、中空繊維、ビーズおよびマイクロキャリア、カップ、スピナーボトル、潅流チャンバ、バイオリアクタ、CellSTACK(登録商標)(コーニング社)および発酵槽などの任意の適切な細胞培養物品の表面に結合させてもよい。
上述したような被覆を有する細胞培養物品に細胞を播種してよい。細胞はどのような細胞タイプのものであってもよい。例えば、細胞は、上皮細胞、内皮細胞、肝細胞、骨格筋細胞、平滑筋細胞、心筋細胞、腸細胞、腎臓細胞、または他の臓器からの細胞、幹細胞、島細胞、血管細胞、白血球、癌細胞などの結合組織細胞であってよい。細胞は、哺乳類細胞、好ましくはヒト細胞であってよいが、細菌、酵母、または植物細胞などの非哺乳類細胞であってもよい。
第1の態様において、高分子細胞培養表面を形成するための組成物は、(i)ポリマー主鎖、その主鎖にコンジュゲートした陽イオン部分、および主鎖にコンジュゲートした架橋剤部分を含むプレポリマー、および(ii)ポリマー主鎖およびその主鎖にコンジュゲートした細胞接着ペプチドを含むペプチドポリマーを含む。
工程a:塩化4−ベンゾイルベンゾイルの合成 手短に言えば、5グラムの4−ベンゾイル安息香酸を100mlの丸底フラスコに入れ、そこに塩化チオニル(15ml)を加えた。結果として得られた懸濁液を加熱して、1時間に亘り還流し、この最中に全ての固体が溶解した。回転蒸発により、揮発性化合物を除去した。残留物をトルエン中に溶解させ、再び蒸発させた。塩化チオニルを全て除去するために、この操作を二回行った。粗製化合物は、石油エーテルからの再結晶化によりさらに精製できる(溶解度が100ml当たり約1gであることに留意)。この生成物は白色粉末である、Mp.95℃(Lit;:98〜99℃)。1H−NMRは文献データに対応する。1H NMR (400 MHz, CDCl3) δ 8.20 (d, J = 7.5, 2H), 7.86 (d, J = 7.4, 2H), 7.78 (d, J = 7.4, 2H), 7.61 (d, J = 6.7, 1H), 7.49 (t, J = 7.4, 2H) ppm. 13C NMR (101 MHz, CDCl3) δ 195.31, 167.85, 143.27, 136.36, 135.75, 133.34, 131.15, 130.09, 130.01, 128.59 ppm。=O信号が170.42ppmである炭素スペクトルに、加水分解が容易に見られることに留意。
図10に与えられた反応にしたがって、Photo−DMAEを調製した。手短に言えば、2−(ジメチルアミノ)エチルメタクリレート(DMEMA)、0.42g(2.67ミリモル)および2−ヒドロキシエチルメタクリレート、0.983g(7.55ミリモル)を、撹拌子を備えた琥珀色のフラスコ内に秤量した20mlのジメチルスルホキシド(DMSO)に加え、これに、N−(3−メタクリルアミドプロピル)−4−ベンゾイルベンズアミド、0.17g(0.48ミリモル)を加え、この溶液中に溶解させた。溶解後、2,2’−アゾビス−(2−メチルブチロニトリル)、40mg(0.21ミリモル)を加え、溶解が完了するまで撹拌した。この溶液を1分間に亘りアルゴンのバブリングを使用して酸素を除去した。次いで、密封したフラスコを、撹拌しながら68℃で20時間に亘り加熱し、光から保護した。室温まで冷却した後、ポリマーを、250mlの脱イオン水中の沈殿によって単離した。収集した粘着性ポリマーをエタノール中に溶解させ、ジイソプロピルエーテル中に沈殿させた。得られた固体をジイソプロピルエーテルで3回洗浄し、次いで、真空乾燥して、微細な白色生成物を得た。
工程A:(MAA−PEG 4 −VN)の合成: VNペプチド(KGGPQVTRGDVFTMP配列番号27)は、以下のプロセスによって、合成されたものであり、カリフォルニア州、サニーベール所在のAmerican Peptide社により提供された。
Sigma Aldrich社から市販されているトリフルオロエタノール(TFE)中1mg/ml総固形分で、成分(i)としての40質量%のPhoto−DMAEおよび成分(ii)としての60質量%のポリ(HEMA−co−VNPEGMAA)をブレンドすることによって、被覆配合物を調製した。
TFE中1mg/ml総固形分で、成分(i)としての40質量%のPhoto−DMAEおよび成分(ii)としての60質量%のポリ(HEMA−co−VNPEGMAA)をブレンドすることによって、40mlの被覆組成物配合物を調製した。
紫外線硬化を、0.6m/分のベルト速度での0、1、2または3回追加、もしくは1.2m/分のベルト速度での1回通過で行ったことを除いて、実施例3に記載されたように、6ウェルプレートを調製した。洗浄後、固定化されたペプチドをBCAにより定量化した。その結果が図12に示されており、この図は、明白な紫外線線量応答を示す。
2010年7月28日に出願した国際特許出願第PCT/IB2010/002160号明細書に記載されたように、トリフルオロエタノール中10mg/ml総固形分で、成分(i)としての10質量%のPhoto−HMAEおよび成分(ii)としての90質量%のポリ(HEMA−co−VNPEGMAA)をブレンドすることによって、被覆配合物を調製した。6ウェルプレートを、上の実施例3に記載したようにこの溶液で調製した。
トリフルオロエタノール中1mg/ml総固形分で、成分(i)としての40質量%のPhoto−HMAEおよび成分(ii)としての60質量%のポリ(HEMA−co−VNPEGMAA)をブレンドすることによって、被覆配合物を調製した。6ウェルプレートを、上の実施例3に記載したようにこの溶液で調製した。固定化されたペプチドの量をBCAにより定量化した。結果が図11に示されている。
ヒト骨髄間葉幹細胞(hBM−MSC)をStemcell technologies社(MSC−001F)を通じて得た。細胞を、製造業者の推奨にしたがって、「MesenCult」基質(参照番号05424)で被覆された培養プレート上において「MesenClut−XF」培地(参照番号05420)中で増殖させた。
ES−D3(ATCC番号CRL−11632)を、ATCCにより推奨されるように、15%のFBSおよび0.1mMのベータ−メルカプトエタノールを添加したDMEM培地中で増殖させた。細胞を、コンフルエンシーに到達する前に、トリプシン処理し、希釈した。
110,115 架橋剤部分
120 陽イオン部分
125 陽イオンモノマー
130,230 親水性部分
135,235 親水性モノマー
140,240 ポリマー主鎖
145,245 重合部分
200 成分2のポリマー
210 ペプチド結合部分
215 ペプチドモノマー
300 架橋ポリマー
400 細胞培養物品
Claims (5)
- 高分子細胞培養表面を形成するための組成物であって、
ポリマー主鎖、該主鎖にコンジュゲートした陽イオン部分、および該主鎖にコンジュゲートした架橋剤部分を含むプレポリマー、および
ポリマー主鎖および該主鎖にコンジュゲートした細胞接着ペプチドを含むペプチドポリマー、を含み、
前記陽イオン部分が、モノアルキルアミノアルキル(メタ)アクリレートモノマーまたはジアルキルアミノアルキル(メタ)アクリレートモノマーである、組成物。 - 前記ポリマー主鎖にコンジュゲートした前記陽イオン部分が、2−(ジメチルアミノ)エチルメタクリレート(DMEMA)モノマーの前記プレポリマーへの重合から生じる、請求項1記載の組成物。
- 前記プレポリマーが、該プレポリマーの前記ポリマー主鎖にコンジュゲートした親水性部分をさらに含む、請求項1または2記載の組成物。
- 前記ポリマー主鎖にコンジュゲートした親水性部分が、モノマーの前記プレポリマーへの重合から生じ、該モノマーが、2−カルボキシエチルメタクリレート、2−カルボキシエチルアクリレート、アクリル酸、メタクリル酸、ヒドロキシプロピルメタクリレート、2−ヒドロキシエチルメタクリレート(HEMA)、2−ヒドロキシエチルアクリレート、グリセロールメタクリレート、ヒドロキシプロピルアクリレート、4−ヒドロキシブチルアクリレート、2−カルボキシエチルアクリルアミド、アクリルアミドグリコール酸、N−(ヒドロキシメチル)アクリルアミド、N−[トリス(ヒドロキシメチル)メチル]アクリルアミド、3−アクリロイルアミノ−1−プロパノール、N−アクリルアミド−エトキシエタノール、およびN−ヒドロキシエチルアクリルアミドからなる群より選択される、請求項3記載の組成物。
- 前記架橋剤部分がベンゾフェノン部分である、請求項1から4いずれか1項記載の組成物。
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