JP7400145B1 - 複数の電界紡糸繊維からなる綿形状の構造を有する骨再生用材料 - Google Patents
複数の電界紡糸繊維からなる綿形状の構造を有する骨再生用材料 Download PDFInfo
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- JP7400145B1 JP7400145B1 JP2023183097A JP2023183097A JP7400145B1 JP 7400145 B1 JP7400145 B1 JP 7400145B1 JP 2023183097 A JP2023183097 A JP 2023183097A JP 2023183097 A JP2023183097 A JP 2023183097A JP 7400145 B1 JP7400145 B1 JP 7400145B1
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Abstract
Description
を脅かす可能性がある。(Aaron W. James et al., “A review of the Clinical Side Effects of Bone Morphogenetic Protein-2,” Tissue Eng. Part B Rev., 2016, 22(4): 284-297) 従って、BMPを治療部位に閉じ込めることが不可欠である。例えば、BMP-2を骨代替/修復材料に確実に結合させ、BMP-2を治療部位から離れて拡散させないようにすることが不可欠である。
糸することによって、より太く電界紡糸された繊維を得た。カルシウム化合物粒子の量が増加するにつれて、電界紡糸繊維の直径はさらに太くなり、最終的に直径は60μmを超えることになる。電界紡糸法は極めて細いナノファイバーを製造する方法として知られているので、Orthorebirth社が太い生分解生繊維を製造するために用いる方法は独特である。2019年9月13日出願のPCT/JP2019/036052に、Orthorebirth社の方法の詳細が記載されている。この太い電界紡糸された生分解性繊維を製造することにより、本発明者らは、繊維上に粒子が露出するように、繊維中に多量のカルシウム化合物粒子を含有させることが可能となった。また、太い繊維は、骨修復部位に埋植した後に繊維の形状を維持する機械的強度を有する。
調製方法の例
7. Loading 30分間結合させる。 (結合は20分ほどで終了する);結合しなかった成分の回収8. 小型遠心機により最高回転速度で4-5分間、チューブを遠心する。9. Non-bound(Flow Through) チューブ内の上部の上清にピペットを挿入し、結合していない成分をピペットで取り除く。(注: ピペットチップの先端からReBOSSISが入らないように注意し、チューブ下部に先端を置き、残りを廃棄する。);洗浄10. Wash PBS又は洗浄用酢酸緩衝液のいずれか500μLを加える;11. 穏やかにボルテックスする。5分間くり返し混合した後、再び穏やかにボルテックスする。;12. 小型遠心機により最高回転速度でチューブを4-5分間遠心し、洗浄バッファーを除く。洗浄を更に2回繰り返す。溶出13. Elution 164μlの非還元1×SDS PAGEゲル色素(BMP-2ダイマーを破壊するため、β-メルカプトエタノールは含まない)を添加することによって溶出させる;14. 穏やかにボステックスし、5分間インキュベートした後、再びボルテックスを行う。;15. 小型遠心機により最高速度で4~5分間チューブを遠心し、溶出物を回収する。;16. 以下のようにゲルをロードする: ReBOSSIS(登録商標) Load:10 μl, Non-Bound 10 μl, Wash 10μl, Elution 11 μl。
PLGA:乳酸・グリコール酸共重合体
SiV:シロキサン含有バテライト(炭酸カルシウム(CaCO3)の結晶相の一つ)
β-TCP:β相リン酸三カルシウム
Claims (9)
- ターゲット型骨形成タンパク質-2(tBMP-2)と、複数の電界紡糸された生分解性繊維から形成された綿形状足場材料を含む骨誘導性骨再生用材料であって、
前記電界紡糸された生分解性繊維は、前記骨誘導性骨再生用材料が十分な機械的強度を有し、尚且つ体液が前記骨再生用材料を通して浸透するための十分なスペースを前記複数の電界紡糸された生分解性繊維の繊維間に有しており、
前記電界紡糸された生分解性繊維はβ―TCP粒子を25~65vol%含んでおり、前記β―TCP粒子の径は1-5μmであり、前記β―TCP粒子は、粒子の一部が前記電界紡糸された生分解性繊維の表面上に露出し、粒子の残りの部分は前記電界紡糸された生分解性繊維内に埋め込まれており、
前記綿形状足場材料を酢酸緩衝液に含まれた前記tBMP-2に所定時間接触させることによって前記電界紡糸された生分解性繊維の表面上に露出した前記β―TCP粒子に前記tBMP-2が特異的に結合されており、
前記tBMP-2は、BMP-2に融合されたβ-TCP結合ペプチドを含み、前記β-TCP結合ペプチドは、LLADTTHHRPWT (SEQ ID NO: 1), GQVLPTTTPSSP (SEQ ID NO: 2), VPQHPYPVPSHK (SEQ ID NO: 3), HNMAPATLHPLP (SEQ ID NO: 4), QSFASLTNPRVL (SEQ ID NO: 5), HTTPTTTYAAPP (SEQ ID NO: 6), QYGVVSHLTHTP (SEQ ID NO: 7), TMSNPITSLISV (SEQ ID NO: 8), IGRISTHAPLHP (SEQ ID NO: 9), MNDPSPWLRSPR (SEQ ID NO: 10), QSLGSMFQEGHR (SEQ ID NO: 11), KPLFTRYGDVAI (SEQ ID NO: 12), MPFGARILSLPN (SEQ ID NO: 13), QLQLSNSMSSLS (SEQ ID NO: 14), TMNMPAKIFAAM (SEQ ID NO: 15), EPTKEYTTSYHR (SEQ ID NO: 16), DLNELYLRSLRA (SEQ ID NO: 17), DYDSTHGAVFRL (SEQ ID NO: 18), SKHERYPQSPEM (SEQ ID NO: 19), HTHSSDGSLLGN (SEQ ID NO: 20), NYDSMSEPRSHG (SEQ ID NO: 21), 及び ANPIISVQTAMD (SEQ ID NO: 22) からなる群から選択されるアミノ酸配列を有しており、
前記骨誘導性骨再生用材料を患者の骨欠損部に埋植すると、間葉系幹細胞を含む体液が前記綿形状足場材料を形成する複数の繊維間の間隙に浸透し、前記β―TCP粒子と結合した前記tBMP-2に接触して、前記骨欠損部において骨形成が誘導される、
前記骨誘導性骨再生用材料。
- 前記電界紡糸された生分解性繊維の径は10~100μmである、請求項1に記載の骨誘導性骨再生用材料。
- 前記電界紡糸された生分解性繊維は40~60vol%のβ-TCP粒子を含有する、請求項1又は2に記載の骨誘導性骨再生用材料。
- 前記電界紡糸された生分解性繊維に含まれる生分解性ポリマーが乳酸・グリコール酸共重合体 (PLGA)である、請求項1又は2に記載の骨誘導性骨再生用材料。
- 前記電界紡糸された生分解性繊維は、ケイ素がドーピングされたバテライト相炭酸カルシウム(SiV)をさらに含む、請求項1又は2に記載の骨誘導性骨再生用材料。
- 電界紡糸された生分解性繊維から形成された綿形状骨誘導性骨再生用材料を製造する方法であって、前記方法は、
電界紡糸法を用いて紡糸された生分解性繊維から形成された綿形状足場材料を作製し、前記電界紡糸された生分解性繊維はβ―TCP粒子を25~65vol%含んでおり、前記β―TCP粒子の径は1-5μmであり、粒子の一部が前記生分解性繊維の表面上に露出し、粒子の残りの部分は前記電界紡糸された生分解性繊維内に埋め込まれており、繊維と繊維の間に体液が浸透するための十分なスペースが形成されており、
前記綿形状足場材料を酢酸緩衝液に含まれたターゲット型骨形成タンパク質-2(tBMP-2)に所定時間接触させることによって、前記電界紡糸された生分解性繊維の表面に露出している前記β-TCP粒子に前記tBMP-2を特異的に結合させ、前記tBMP-2は、BMP-2に融合されたβ-TCP結合ペプチドを含み、前記β-TCP結合ペプチドは、LLADTTHHRPWT (SEQ ID NO: 1), GQVLPTTTPSSP (SEQ ID NO: 2), VPQHPYPVPSHK (SEQ ID NO: 3), HNMAPATLHPLP (SEQ ID NO: 4), QSFASLTNPRVL (SEQ ID NO: 5), HTTPTTTYAAPP (SEQ ID NO: 6), QYGVVSHLTHTP (SEQ ID NO: 7), TMSNPITSLISV (SEQ ID NO: 8), IGRISTHAPLHP (SEQ ID NO: 9), MNDPSPWLRSPR (SEQ ID NO: 10), QSLGSMFQEGHR (SEQ ID NO: 11), KPLFTRYGDVAI (SEQ ID NO: 12), MPFGARILSLPN (SEQ ID NO: 13), QLQLSNSMSSLS (SEQ ID NO: 14), TMNMPAKIFAAM (SEQ ID NO: 15), EPTKEYTTSYHR (SEQ ID NO: 16), DLNELYLRSLRA (SEQ ID NO: 17), DYDSTHGAVFRL (SEQ ID NO: 18), SKHERYPQSPEM (SEQ ID NO: 19), HTHSSDGSLLGN (SEQ ID NO: 20), NYDSMSEPRSHG (SEQ ID NO: 21), 及び ANPIISVQTAMD (SEQ ID NO: 22) からなる群から選択されるアミノ酸配列を有しており、
前記tBMP-2が前記電界紡糸された生分解性繊維の表面に露出している前記β-TCP粒子に特異的に結合した前記綿形状足場材料を、洗浄用緩衝液を用いて洗浄する、工程を含む、
前記電界紡糸された生分解性繊維から形成された綿形状骨誘導性骨再生用材料を製造する方法。
- 前記洗浄用緩衝液はPBS又は洗浄用酢酸緩衝液である、請求項6に記載の方法。
- 前記電界紡糸された生分解性繊維はPLGAを含む、請求項6又は7に記載の方法。
- 前記電界紡糸された生分解性繊維は、ケイ素がドーピングされたバテライト相炭酸カルシウム(SiV)をさらに含む、請求項6又は7に記載の方法。
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PCT/US2019/068509 WO2020139901A1 (en) | 2018-12-25 | 2019-12-25 | A bone regeneration material having a cotton-wool like structure formed of a plurality of electrospun fibers |
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JP2022511160A (ja) | 2022-01-31 |
EP3902572A4 (en) | 2022-08-31 |
JP2023012540A (ja) | 2023-01-25 |
KR20210107082A (ko) | 2021-08-31 |
JP7128902B2 (ja) | 2022-08-31 |
JP7174880B2 (ja) | 2022-11-17 |
SG11202106161PA (en) | 2021-07-29 |
WO2020139901A1 (en) | 2020-07-02 |
CA3124677A1 (en) | 2020-07-02 |
US20210023269A1 (en) | 2021-01-28 |
JP7381692B2 (ja) | 2023-11-15 |
JP2022130517A (ja) | 2022-09-06 |
MA54618A (fr) | 2021-11-03 |
JP2024010091A (ja) | 2024-01-23 |
US20240108787A1 (en) | 2024-04-04 |
US20220395610A1 (en) | 2022-12-15 |
EP3902572A1 (en) | 2021-11-03 |
AU2019416205A1 (en) | 2021-08-12 |
CN113226386A (zh) | 2021-08-06 |
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