JP6588450B2 - 骨移植片ならびに骨移植片を作製及び使用する方法 - Google Patents
骨移植片ならびに骨移植片を作製及び使用する方法 Download PDFInfo
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Description
本発明は、概して、骨移植片ならびにそれを作製及び使用する方法に関する。より具体的には、本発明は、骨誘導性脱塩骨と骨伝導性皮質骨−海綿骨チップとの混合物中に骨原性幹細胞を含む、骨原性骨移植片に関する。本骨移植片を有するキット及びインプラント、ならびに本骨移植片を作製及び使用する方法が、さらに含まれる。
〔背景技術〕
骨は、一般に、例えば骨折の後に、完全に再生する能力を有するが、再生するためには非常に小さな骨折空間または何らかの足場を必要とする。骨移植は、失われた骨を置き換えて、非常に複雑、適切に治癒できない、または著しい健康上の危険性を患者に呈する骨折を修復する、外科的処置である。
〔発明の概要〕
非限定的な例示的な実施形態によると、本発明は、骨誘導性脱塩骨と骨伝導性皮質骨−海綿骨チップとの混合物中に骨原性幹細胞を含む、骨治癒を促進するための骨移植片を提供する。
〔図面の簡単な説明〕
非限定的な実施形態が、以下の添付の図面を参照して本明細書に記載される。
〔発明を実施するための形態〕
本発明は、骨移植片ならびにそのような骨移植片を作製及び使用するための方法、ならびにそれを含むキット及びインプラントまたは他のデバイスを対象とする。
(A)海綿骨チップを0.3〜0.5%の生理食塩水で処理し、生理食塩水で処理したチップをリン酸緩衝食塩水(PBS)ですすぎ(例えば、2回以上)、チップを凍結培地(例えば、最小必須培地(MEM))及び10%ジメチルスルホキシド(DMSO)と混合し、チップを培地で凍結させ、−80℃から−180℃の温度で保管すること、
(B)海綿骨チップを0.3〜0.5%の生理食塩水で処理し、生理食塩水で処理したチップをリン酸緩衝食塩水(PBS)ですすぎ(2〜3回以上)、チップを最大10日間(例えば、最小必須培地で)培養し、培養期間後にチップを凍結培地と混合し、チップを培地で凍結させ、−80℃から−180℃の温度で保管すること、
(C)海綿骨チップを37℃及び5%CO2に設定したインキュベータにおいて周期的に撹拌しながらコラゲナーゼ(1mg/ml〜10mg/ml)で1〜3時間処理し、70ミクロンの細胞濾過器を通して上清を濾過し、結果として得られた細胞懸濁液を遠心分離して細胞ペレットを形成し、細胞ペレットを細胞培養培地で再構成して組織培養フラスコに播種し、細胞を例えば37℃で最大10日間培養し、トリプシン等の解離剤を用いて細胞を分離させて海綿骨チップに再播種して、細胞富化海綿骨チップを形成し、細胞富化海綿骨チップを凍結培地と混合し、−80℃から−180℃の温度で保管すること、あるいは、
(D)海綿骨チップを上述の選択肢(A)のように生理食塩水で処理した後、チップを上述の選択肢(c)のようにコラゲナーゼで処理及び加工すること。
(A)海綿骨チップを0.3〜0.5%の生理食塩水で処理し、生理食塩水で処理したチップをリン酸緩衝食塩水(PBS)ですすぎ、チップを培地において−80℃から−180℃の温度で凍結させること、
(B)海綿骨チップを0.3〜0.5%の生理食塩水で処理し、生理食塩水で処理したチップをリン酸緩衝食塩水(PBS)ですすぎ、チップを最大10日間(例えば、最小必須培地で)培養し、凍結培地を添加し、チップを培地において−80℃から−180℃で凍結させること、
(C)海綿骨チップをコラゲナーゼ(1mg/ml〜10mg/ml)で最大3時間処理し、上清を濾過し、遠心分離して細胞ペレットを得、細胞ペレットを細胞培養培地で最大10日間、例えば37℃で再構成し、細胞を海綿骨チップ上に再播種すること、あるいは
(D)海綿骨チップを上述の選択肢(A)のように生理食塩水で処理した後、チップを上述の選択肢(c)のようにコラゲナーゼで処理及び加工すること。
脱塩皮質骨チップと細胞富化海綿骨チップとを、1:1〜2:1の比で混合する。最後のステップは図1に示されていない。この方法により、有利なことに、骨原性、骨誘導性、かつ骨伝導性である、骨移植片材料が得られる。例示的な実施形態によると、骨移植片における骨原性細胞の濃度は、最終生成物1cc当たり20,000個を上回る細胞となり得る。
本骨移植片のいずれかを、骨移植片を必要とする哺乳動物に挿入することを含む方法もまた、本明細書に提供される。例として、本骨移植片は、本骨移植片のうちの1つ以上を、それを必要とする哺乳動物、例えば哺乳動物に挿入することによって、哺乳動物に挿入または適用され得る。骨移植片は、例えば、例として切片、パテ、ゲル、及び/またはスポンジの形態の移植片により挿入または適用されてもよく、あるいは骨移植片は、インプラントと共に、例えば、その中または上に(例えばコーティングとして)組み込まれた状態でも、利用可能であり得る。骨移植片は、骨移植片の必要性、骨移植片の種類、及び患者を考慮して医師により決定される、有効量で挿入され得る。
なおもさらなる例示的な実施形態は、本明細書に提供される骨移植片のうちの1つ以上を含むインプラントまたは他のデバイスもしくは製品を対象とし、本骨移植片はインプラントの中もしくは上に組み込まれるか、または製品もしくはインプラントと共に使用される。例えば、本骨移植片代替物は、インプラント内への、またはその中の移植片として使用することができる。非限定的な例として、骨移植片は、圧迫骨折の治療のための椎体間スペーサと共に使用することができる。
なおもさらなる実施形態は、本骨移植片のうちの1つ以上またはその1つ以上の構成要素もしくは要素を含む、キットを対象とする。
〔実施例〕
実施例1
本実施例は、本発明の非限定的な例示的な実施形態による、骨誘導性脱塩骨と骨伝導性皮質骨−海綿骨チップとの混合物中に、骨原性幹細胞を含む、例示的な骨移植片を作製する方法を示す。
(a)海綿骨チップを、0.3〜0.5%の生理食塩水で処理してもよい。生理食塩水で処理したチップを、次いで、リン酸緩衝食塩水ですすいでもよい(2回以上)。チップを、凍結培地(最小必須培地(MEM))及び10%ジメチルスルホキシド(DMSO)と混合し、−80℃から−180℃で凍結させてもよい。
本実施例は、本発明の非限定的な例示的な実施形態による、骨誘導性脱塩骨と骨伝導性皮質骨−海綿骨チップとの混合物中に、骨原性幹細胞を含む、例示的な骨移植片を作製する方法に関する別の実施形態を示す。
Claims (8)
- (A)骨髄から皮質骨を分離し、前記皮質骨をすすぎ、粉砕して繊維にして、この皮質骨繊維を処理して、前記繊維が含まれている水のpHを6.5〜7になるように調節して脱塩皮質骨繊維を形成することによって、脱塩皮質骨繊維を取得及び調製することと、
(B)ボーンミルを用いて顆部を粉砕して、0.05〜1.5mmの範囲の海綿骨チップを得ることによって新鮮凍結顆部から海綿骨チップを得、
(1)前記海綿骨チップを0.3〜0.5%の生理食塩水で処理し、前記生理食塩水で処理したチップをリン酸緩衝食塩水ですすぎ、前記チップを凍結培地及びジメチルスルホキシド(DMSO)と混合し、前記チップを培地で凍結させ、前記チップを保管することによって細胞富化海綿骨チップを形成すること、
(2)前記海綿骨チップを0.3〜0.5%の生理食塩水で処理し、前記生理食塩水で処理したチップをリン酸緩衝食塩水ですすぎ、前記チップを最大10日間培地で培養し、前記培養期間後に、前記チップを凍結培地と混合し、前記チップを培地で凍結させ、前記チップを保管することによって細胞富化海綿骨チップを形成すること、
(3)前記海綿骨チップを37℃及び5%O2でインキュベータにおいて周期的に撹拌しながらコラゲナーゼで1〜3時間処理し、上清を形成させ、フィルタを通して前記上清を濾過し、結果として得られる細胞懸濁液を5〜15分間遠心分離して細胞ペレットを形成し、前記細胞ペレットを細胞培養培地で再構成して組織培養フラスコに播種し、前記細胞を最大10日間培養し、解離剤を用いて前記細胞を分離させて前記海綿骨チップに再播種して、細胞富化海綿骨チップを形成し、前記細胞富化海綿骨チップを凍結培地と混合し、前記チップを保管すること、ならびに
(4)前記海綿骨チップを0.3〜0.5%の生理食塩水で処理した後、前記生理食塩水で処理したチップを(3)のようにコラゲナーゼで処理及び加工することによって細胞富化海綿骨チップを形成すること、からなる群から選択される方法によって処理することと、
(C)前記脱塩皮質骨繊維と前記細胞富化海綿骨チップとを約1:1〜2:1の比で混合し、それによって骨原性、骨誘導性、かつ骨伝導性である骨移植片材料を得ることと、を含む、骨移植片を作製する方法。 - 前記細胞富化海綿骨チップが、−80℃から−180℃の温度で保管される、請求項1に記載の方法。
- 前記骨移植片中の骨原性細胞の濃度が、最終生成物1cc当たり20,000個を上回る細胞である、請求項1に記載の方法。
- 前記皮質骨繊維が、5:1〜500:1の長さ対幅の比まで粉砕される、請求項1に記載の方法。
- 前記皮質骨繊維が、凍結乾燥され、室温で保管される、請求項1に記載の方法。
- 前記海綿骨チップが、長骨の新鮮凍結顆部から得られる、請求項1に記載の方法。
- 前記皮質骨繊維が、250ミクロン〜3mmのサイズを有する、請求項1に記載の方法。
- 前記骨移植片材料がパテの形態である、請求項1に記載の方法。
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EP3102251A1 (en) | 2016-12-14 |
WO2015120221A1 (en) | 2015-08-13 |
US20170119929A1 (en) | 2017-05-04 |
EP3102251A4 (en) | 2017-02-22 |
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