JP6568299B2 - バイオ印刷のための回転装置およびその使用方法 - Google Patents
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Description
本発明は、組織工学の分野におけるバイオエンジニアリング製造技術に関し、より詳細には、3Dバイオ印刷のための回転ロッド、栄養を供給するための3Dバイオ印刷プラットフォーム、及びそのプラットフォームを使用する管状組織を印刷する方法に関する。
我々の生物でジグザグする血管は、臓器の正常な動作を保証するために必要な栄養物質を輸送し、毒性廃棄物を排泄する役割を果たす。新しい人工血管を開発することは、常に長年の問題であった。老齢人口の増加に伴い、腹部大動脈瘤や血管塞栓術などの状況が次第に悪化し、人工血管の需要が高まっており、様々なタイプの人工血管も順次存在している。現代のバイオエンジニアリングと材料科学の発展により、多くの新しい人工材料と技術が血管手術の分野で広く応用されている。現在、人工血管を製造するために一般的に使用されている材料は、ナイロン、オーロン(Orlon)、イバロン(Ivalon)、ダクロン、テフロン(登録商標)、ePTFE、シルクなどのポリマーまたは合成材料であるが、これらのタイプの材料は、低生体適合性、サービス寿命の短さ、6mm以下になりにくい血管径、及び血管塞栓症への脆弱性などの状況が全てに存在する。
本発明の目的、技術的解決法及び利点をさらに説明するために、本発明を図面と組み合わせて以下のようにさらに詳細に説明する。本明細書に記載された実施形態は、本発明の範囲を限定するのではなく、本発明を説明するためだけに使用されることに留意されたい。
Claims (21)
- 3Dバイオ印刷用回転ロッドであって、
ここで、前記回転ロッドは水平に配置され、かつ、回転駆動するものであり、前記回転ロッドは中空構造を有し、その表面に少なくとも1つの孔が設けられており、
3Dバイオ印刷プロセスの間、栄養溶液が前記中空構造を通過し、前記栄養溶液の一部は、前記少なくとも1つの孔を介して滲出することを特徴とする、回転ロッド。 - 前記回転ロッドが、制御可能な回転速度を有するモータによって回転可能に駆動されるものであって、前記回転ロッドの少なくとも一端が着脱可能である、請求項1に記載の回転ロッド。
- 前記回転ロッドの表面が、少なくとも1層の液体透過性の生体適合性物質でコーティングされている、請求項1に記載の回転ロッド。
- 前記生体適合性物質が、生体適合性ハイドロゲルまたは多孔性ポリマーフィルムを含む、請求項3に記載の回転ロッド。
- 前記生体適合性ハイドロゲルが、温度制御、pH調整、酵素分解および化学反応を含む生物学的、物理的または化学的方法によって除去可能または分離可能である、請求項4に記載の回転ロッド。
- 前記生体適合性物質が、化学修飾、共重合、物理的混合または表面修飾によって、以下の物質:ゼラチン物質およびその複合体、飽和脂肪酸、ポリ(N,N−ジエチルアクリルアミド)、ヒドロキシプロピルメチルセルロース、ポリ乳酸、ポリカプロラクトン、ポリ(ラクチド−co−グリコリド)、ポリ(N−イソプロピルアクリルアミド)、ポリ(2−(N,N−ジメチルアミノ)エチルメタクリレート)、ポリ(エチレンオキシド)、およびそれらの誘導体、の1つ以上から形成される、請求項3に記載の回転ロッド。
- 前記回転ロッドが、機械的強度を示し、印刷される必要がある管状組織に基づいてその形状、構造、長さおよび開口サイズを個々に有する物質である、請求項1に記載の回転ロッド。
- 栄養を供給するための3Dバイオ印刷プラットフォームであって、請求項1に記載の回転ロッドと、栄養供給システムとを含み、ここで、3Dバイオ印刷プロセスの間、前記栄養供給システムは、栄養溶液を前記回転ロッドへと送達することにより、前記栄養溶液が前記回転ロッドの中空構造を通過し、前記栄養溶液の一部が前記回転ロッドの表面の少なくとも1つの孔を介して滲出することを特徴とする、3Dバイオ印刷プラットフォーム。
- 前記回転ロッドが、第1端部および第2端部を有し、
前記栄養供給システムが:
栄養溶液容器;栄養溶液容器へと及ぶ一端部と、前記回転ロッドの前記第1端部に至る他端部とを有する栄養溶液送達チューブ;
前記回転ロッドの前記第2端部に至る一端部と、前記栄養溶液容器へと至る他端部とを有する栄養溶液返還チューブ;及び、
前記栄養溶液送達チューブのラインに配置されたポンプ、
を備え、3Dバイオ印刷プロセス中において、前記栄養溶液が、前記ポンプによって前記栄養溶液チューブへと吸引され、前記回転ロッドの前記中空構造へ入り、それにより前記中空構造の前記栄養溶液の一部が、前記回転ロッドの表面の少なくとも1つの孔を介して滲出し、前記栄養溶液の他の部分は、前記中空構造および前記栄養溶液返還チューブを通って前記栄養溶液容器へと再循環されることを特徴とする、請求項8に記載の3Dバイオ印刷プラットフォーム。 - 前記栄養溶液の流速が制御可能である、請求項9に記載の3Dバイオ印刷プラットフォーム。
- 前記栄養溶液返還チューブの前記ラインに濾過手段が設けられている、請求項9に記載の3Dバイオ印刷プラットフォーム。
- 前記3Dバイオ印刷プラットフォームの温度が制御可能である、請求項8に記載の3Dバイオ印刷プラットフォーム。
- 請求項8に記載の3Dバイオ印刷プラットフォームを用いた管状組織を印刷する方法であって、以下の工程:
回転ロッドを回転駆動する工程;及び
栄養溶液が前記回転ロッドの中空構造を通過し、前記栄養溶液の一部が前記回転ロッドの表面の少なくとも1つの孔を介して滲出するように、3Dバイオ印刷プロセス中に栄養供給システムによって前記回転ロッドに前記栄養溶液を送達する工程、
を含む、前記方法。 - 身体パラメータまたは直接3Dモデリングにしたがってモデリングすることによって回転ロッドの設計を補助するコンピュータを利用する工程、及び回転ロッドを作製する工程、
をさらに含む、請求項13に記載の方法。 - 回転ロッドの設計を補助するコンピュータを利用する工程が、3Dモデリングソフトウェアおよび/またはシミュレーション技術を利用して、前記回転ロッドの機械的強度、直径、長さ、管壁の厚さ、屈曲および表面の粗さ、前記回転ロッドの表面の孔の形状、多孔度、孔分布、および孔の開口サイズを含むパラメータを設定することを含む、請求項14に記載の方法。
- 前記回転ロッドの表面に、少なくとも1層の液体透過性の生体適合性物質をコーティングする工程をさらに含む、請求項14に記載の方法。
- 前記栄養溶液が前記回転ロッドの表面の少なくとも1つの孔を介して前記生体適合性物質から滲出する間に、バイオインクを印刷する工程をさらに含む、請求項16に記載の方法。
- 前記栄養溶液の流速が、ポンプによって制御される、請求項17に記載の方法。
- 前記栄養溶液を、外部から前記回転ロッドの表面に噴霧する工程をさらに含む、請求項13に記載の方法。
- 管状組織を次元印刷(dimensional printing)した後に、前記回転ロッドの表面から前記生体適合性物質を除去または分離し、前記回転ロッドから管状組織を取り外し、培養を行う工程をさらに含む、請求項17に記載の方法。
- 管状組織を次元印刷した後に前記管状組織を有する前記回転ロッドを取り外して培養し、続いて培養後に前記回転ロッドから前記管状組織を取り外す工程をさらに含む、請求項17に記載の方法。
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