JP2023508478A - 細胞培養基材及びその製造方法 - Google Patents
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Abstract
Description
滅菌処理された平均直径が260nmのPVDF繊維から形成され、坪量が4.5g/m2、厚さが5μmの繊維ウェブを準備した。以後、下記の準備例で製造された細胞培養コーティング組成物をピペットエイドを用いて繊維ウェブの表面に分注した後、30℃恒温培養器で1時間反応して繊維ウェブの表面に細胞培養コーティング層を形成させた。以後、3次蒸留水を用いて5分ずつ3回洗浄した後、クリーンベンチ内でプレート蓋を開けたまま、空気中で乾燥させて細胞培養基材を製造した。
実施例1と同様に実施して製造するが、繊維ウェブを平均直径が500nmのPVDF繊維で形成し、坪量が5.8g/m2、厚さが3μmの繊維ウェブを用いて細胞培養基材を製造した。
実施例1と同様に実施して製造するが、細胞培養コーティング組成物でコーティングしない繊維ウェブを細胞培養基材として使用した。
実施例2と同様に実施して製造するが、細胞培養コーティング組成物でコーティングしない繊維ウェブを細胞培養基材として使用した。
実施例1~2及び比較例1~2による細胞培養基材の表面に対するSEM写真を撮影し、これを図1~3に示した。
比較例1による細胞培養基材に細胞培養用コーティング組成物として市販中のMatrigel、Vitronectin-XFTMを当該コーティング組成物メーカーのプロトコルに基づいてコーティングさせて細胞培養基材を製造した。
実施例1、比較例3及び4による細胞培養基材に誘導多能性幹細胞を同量を分注した後、 幹細胞培養培地(StemMACSTM)条件で培養後、DAPI、NANOG、SOX2、Mergeマーカーの発現の有無を観察し、その結果を図5(実施例1)、図6(比較例3)、図7(比較例4)に示した。
実施例1及び比較例3による細胞培養基材に誘導多能性幹細胞を同量分注した後、幹細胞培養培地(StemMACSTM)条件で培養後、培養された細胞の継代1(P1)と継代13(P13)のモホロジーを細胞染色法で細胞培養の有無を確認して図8に示した。また、時間別増殖率を吸光度分析を通じて確認し、その結果を図9に示した。また、継代3(P3)及び継代9(P9)に対するOCT4マーカーの発現を免疫細胞化学法(Immunocytochemistry)で確認して評価した写真をそれぞれ図10に示した。また、誘導多能性幹細胞を幹細胞培養培地(StemMACSTM)条件で5日間培養後、Oct4マーカーに対する発現程度を評価し、その結果を図11(実施例1)及び図12(比較例3)に示した。
比較例3と同様に実施して製造するが、比較例4の繊維ウェブに変更して細胞培養基材を製造した。
比較例4と同様に実施して製造するが、比較例4の繊維ウェブに変更して細胞培養基材を製造した。
実施例1、実施例2、比較例3~6による細胞培養基材を下記の方法で医療機器有効期間設定及び安定性評価によるガイドラインに従って加速老化試験を行った後、誘導多能性幹細胞を培養させて細胞培養基材の保存安定性を評価した。
Claims (12)
- 繊維が集積された繊維ウェブと、
前記繊維ウェブの一表面に位置する繊維の少なくとも一部の繊維の間を連結するコーティング膜を含む細胞培養コーティング層を備え、前記細胞培養コーティング層は、機能性ペプチドがムール貝接着タンパク質に結合された細胞培養用融合タンパク質から形成された、細胞培養基材。 - 前記機能性ペプチドは、細胞の付着、移動、増殖及び分化のいずれか1つ以上を促進させる機能を有することを特徴とする、請求項1に記載の細胞培養基材。
- 前記繊維ウェブは、ポリスチレン(PS)、ポリエステル、ポリエーテルスルホン(PES)、ポリビニリデンフルオライド(PVDF)、ポリジメチルシロキサン(PDMS)、ポリアミド、ポリイミド、ポリエチレン及びポリプロピレンからなる群から選ばれたいずれか一つ以上の成分を含むことを特徴とする、請求項1に記載の細胞培養基材。
- 前記ムール貝接着タンパク質は、配列番号1~配列番号14のアミノ酸配列からなる群から選ばれたいずれかのタンパク質または前記群から選ばれた1種以上のアミノ酸配列が連結されたタンパク質であることを特徴とする、請求項1に記載の細胞培養基材。
- 前記機能性ペプチドは、RGD配列を含むことを特徴とする、請求項1に記載の細胞培養基材。
- 前記機能性ペプチドは、配列番号15~配列番号18のアミノ酸配列からなる群から選ばれたいずれか1つ以上のペプチドまたは前記群から選ばれた1種以上のアミノ酸配列が連結されたペプチドであることを特徴とする、請求項1に記載の細胞培養基材。
- 前記繊維ウェブの一面に対向する他面に配置された支持体をさらに含むことを特徴とする、請求項1に記載の細胞培養基材。
- 前記繊維ウェブは、平均直径が200~1000nmであり、厚さが2~20μmであり、坪量が3~20g/m2であることを特徴とする、請求項1に記載の細胞培養基材。
- (1)カルボジイミド系カップリング剤及び反応剤を含む活性溶液と機能性ペプチドがムール貝接着タンパク質に結合された細胞培養用融合タンパク質を準備する段階と、
(2)準備された活性溶液と細胞培養用融合タンパク質を混合して細胞培養コーティング組成物を製造する段階と、
(3)細胞培養コーティング組成物を繊維ウェブの表面に処理して細胞培養コーティング層を形成させる段階と、を含む細胞培養基材の製造方法。 - 前記カルボジイミド系カップリング剤は、1-エチル-3-(3-ジメチルアミノプロピルカルボジイミド塩酸塩(EDC)またはN,N'-ジシクロヘキシルカルボイミド(DCC)であり、前記反応剤は、N-ヒドロキシスルホスクシンイミド(Sulfo-NHS)であることを特徴とする、請求項9に記載の細胞培養基材の製造方法。
- 前記カルボジイミド系カップリング剤と反応剤は、1:0.1~10重量比で活性溶液に含まれ、
前記細胞培養コーティング組成物は、細胞培養用融合タンパク質100重量部に対して、カルボジイミド系カプリング剤が1~100重量部で混合されることを特徴とする請求項9に記載の細胞培養基材の製造方法。 - 多孔性細胞培養基材の表面の少なくとも一部の気孔を閉塞するコーティング膜を形成する細胞培養コーティング組成物であって、前記細胞培養コーティング組成物は、機能性ペプチドがムール貝接着タンパク質に結合された細胞培養用融合タンパク質、カルボジイミド系カップリング剤及び反応剤を含むことを特徴とする、多孔性細胞培養基材用細胞培養コーティング組成物。
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