JP2015503367A - 架橋脱水された胎盤組織移植片ならびにそれを作製および使用する方法 - Google Patents
架橋脱水された胎盤組織移植片ならびにそれを作製および使用する方法 Download PDFInfo
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- JP2015503367A JP2015503367A JP2014549057A JP2014549057A JP2015503367A JP 2015503367 A JP2015503367 A JP 2015503367A JP 2014549057 A JP2014549057 A JP 2014549057A JP 2014549057 A JP2014549057 A JP 2014549057A JP 2015503367 A JP2015503367 A JP 2015503367A
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Abstract
Description
本明細書では、架橋剤で脱水された胎盤組織移植片と接触することから生じる組織移植片を開示する。本明細書で記載される組織移植編は、1つまたは複数の胎盤構成要素で構成される。本明細書において用いられる用語「胎盤の構成要素」は、任意の材料または胎盤および臍帯に存在する組織を含む。一態様では、胎盤の構成要素は、限定されないが、羊膜(amnion membrane)、羊膜、絨毛膜、ウォートン・ジェリー(Wharton’s jelly)、胎盤ディスク、またはそれらの任意の組み合わせを含む。
組織移植片を生産するために用いられる構成要素は、胎盤に由来する。胎盤の起源は変更することができる。一態様では、胎盤は、ヒトのような哺乳類に由来し、制限されないが、ウシ、ブタなどを含む他の動物をここで用いることができる。ヒトの場合、胎盤の回収は、帝王切開の出産中にそれが採取される病院で行われる。出産間近の母親を指すドナーは、移植が可能な最も安全な組織を提供するために設計された総合的なスクリーニングプロセスを自主的に受ける。スクリーニングプロセスは、好ましくは、ヒト免疫不全ウイルス1型および2型に対する抗体(抗−HIV−1および抗−HIV−2)、B型肝炎ウイルス B型肝炎表面抗原(HBsAg)に対する抗体(抗−HBV)、C型肝炎ウイルスに対する抗体(抗−HCV)、ヒトT−リンパ向性ウイルスI型およびII型に対する抗体(抗−HTLV−I、抗−HTLV−II)、CMV、および梅毒に対する抗体、および、ヒト免疫不全ウイルス1型(HIV−1)およびC型肝炎ウイルス(HCV)を検査する核酸に関して、従来の血清検査を用いて検査する。上記の検査リストは単に例示的であり、当業者により理解されるように、より多くの、より少ない、または異なる検査が、経時的にまたは移植片の使用目的に基づいて、所望され、または、必要とされてよい。
処理センターまたは実験室への到着時に、輸送物は開封されて、滅菌輸送バッグ/容器が、なお密封されてかつ冷却されているか、適切なドナー書類が存在するか、そして書類上のドナー番号が、組織を含む滅菌輸送バッグ上の番号と一致するか、確認される。組織を含む滅菌輸送バッグはそれから、さらなる処理の準備が整うまで、冷蔵庫内で保管される。
組織をさらに処理する準備が整ったら、胎盤組織をさらに処理するために必要な滅菌用品が制御環境中のステージングエリアに集められて、制御環境の中へ導入するために準備がされる。一態様では、胎盤は室温で処理される。制御環境が製造フードならば、滅菌用品は開封されて従来の滅菌技術を用いてフード内へ置かれる。制御環境がクリーンルームならば、滅菌用品は開封されて滅菌ドレープで覆われたカート上に置かれる。作業表面全体は、従来の滅菌技術を用いて、一枚の滅菌ドレープで覆われており、滅菌用品および処理装置は、同様に従来の滅菌技術を用いて、滅菌ドレープ上に置かれる。
本明細書で述べた胎盤組織のいずれかは、以下に記載されている技術を用いて化学的に除染できる。一態様では、胎盤組織は室温で除染される。一態様では、ステップ130で生産される羊膜(amnion membrane)は、次のステップのために滅菌ナルジェンジャー中に置くことができる。一態様では、次の方法は、羊膜(amnion membrane)を清浄化するために用いることができる。各ナルジェンジャーは無菌的に18%の高張生理食塩水で満たされて密封される(または蓋で封がされる)。ジャーはそれから、ロッカープラットフォーム上に置かれて、30〜90分間撹拌されて、羊膜(amnion membrane)から汚染物質をさらに取り除く。ロッカープラットフォームが臨界的環境(例えば、製造フード)内でなかった場合は、ナルジェンジャーは制御/滅菌環境へ戻されて開封される。滅菌鉗子を用いて、または無菌的に中身を静かに移して、羊膜(amnion membrane)は、18%高張生理食塩水を含むナルジェンジャーからやさしく取り出されて、空のナルジェンジャー中に置かれる。羊膜(amnion membrane)を有する、この空のナルジェンジャーは、それから、無菌的に、予め混合された抗生物質溶液で満たされる。一態様では、予め混合された抗生物質溶液は、硫酸ストレプトマイシンおよび硫酸ゲンタマイシンのような抗生物質の混合物からなる。ポリミキシンB硫酸塩およびバシトラシンのような他の抗生物質、または、現在利用可能または将来利用可能である同様の抗生物質もまた、適切である。加えて、抗生物質溶液は、羊膜(amnion membrane)の温度を変化させないように、添加時に室温であることが好ましく、さもなければ羊膜(amnion membrane)を傷つける。羊膜(amnion membrane)および抗生物質を含む、このジャーまたは容器はそれから、密封され、または密閉されて、ロッカープラットフォーム上に置かれて、好ましくは60〜90分間、撹拌される。抗生物質溶液内での羊膜(amnion membrane)のそのような振動または撹拌は、組織から汚染物質および細菌をさらに取り除く。場合により、羊膜(amnion membrane)は、洗浄剤で洗浄することができる。一態様では、羊膜(amnion membrane)は、0.1〜10%、0.1〜5%、0.1〜1%、または0.5%のTriton−X洗浄液で洗浄することができる。
上述の準備された1つまたは複数の胎盤組織は、脱水された胎盤組織移植片を生産するために脱水することができる。2つまたはそれ以上の胎盤組織が用いられる場合、組織移植片は積層である。例えば、羊膜、羊膜(amnion membrane)、絨毛膜、ウォートン・ジェリー、またはこれらの組み合わせからなる積層を生産することができる。一態様では、組織移植片は羊膜/絨毛膜の積層である。別の態様では、組織は少なくとも2つの絨毛膜の層、少なくとも2つの羊膜の層、または少なくとも1つの絨毛膜の層および羊膜を有する。さらなる態様では、胎盤組織は複数の絨毛膜および/または羊膜(amnion membrane)を有する。積層された組織移植片を生産するための技術は、当技術分野において既知である。
胎盤組織移植片が脱水された後、移植片は架橋剤に接触される。理論に束縛されるものではないが、脱水された組織移植片を架橋することは、水和した組織移植片を架橋することと比べて高密度化および小さくなった孔径サイズを有する移植片を生産する。このことは図2に示されていて、胎盤組織20は脱水された組織移植片22を生産するために脱水される。脱水された組織移植片22の架橋は、組織移植片24を生産し、組織移植片24は水和した組織移植片28から架橋した組織移植片26と比べてより小型で、高密度で、多孔質でない。多孔率を低減して高密度の組織移植片を生産することの重要性は、以下で論じられる。
いったん架橋後に組織移植片が十分に脱水されたら、組織移植片はそれから、特定の商品サイズに切断される準備がされて、保管、最終的な滅菌および後の外科的使用のために、適切に梱包される。生産されるべき移植片の数は、乾燥用固定具(単数または複数)上の組織のサイズおよび形状に基づいて見積もられる。また、それぞれの組織移植片に対して一つの、適切な数のポーチが、滅菌/制御環境の中に導入される。
本明細書に記載の移植片は、対象の創傷治癒を含む様々な医学的用途で使用し得る。上記のとおり、本明細書に記載の架橋された組織移植片は、架橋された水和した胎盤組織と比べてより小型で高密度である。加えて、本明細書に記載の組織移植片の多孔率は、架橋された、水和した組織移植片と比べるとより低い。本明細書に記載の組織移植片は、創傷をより早く治癒するように、創傷に生物活性剤を局所的に保つことが望ましい創傷治癒の適用に有用である。さらに、生物活性剤が有毒物質であるなら、対象の全身至る所に広がる場合、本明細書に記載の組織移植片は生物活性剤が創傷から移動するのを防ぐ効果的な、不透過性のバリアを提供することができる。
Claims (29)
- 脱水された胎盤組織移植片を架橋剤と接触させることを含む方法によって生産される胎盤組織移植片。
- 前記胎盤組織移植片が、1つまたは複数の胎盤の構成要素を含む、請求項1に記載の移植片。
- 前記胎盤の構成要素が、羊膜、羊膜(amnion membrane)、絨毛膜、ウォートン・ジェリー、またはこれらの任意の組み合わせを含む、請求項2に記載の移植片。
- 前記胎盤組織移植片が、羊膜/絨毛膜の積層を含む、請求項1に記載の移植片。
- 前記胎盤組織移植片が、少なくとも2つの絨毛膜の層、少なくとも2つの羊膜の層、または少なくとも1つの絨毛膜の層および羊膜を含む、請求項1に記載の移植片。
- 前記胎盤組織移植片が、お互いに貼り付けられた複数の絨毛膜および/または羊膜(amnion membrane)を有する、請求項1に記載の移植片。
- 前記脱水された胎盤組織移植片が、化学的に脱水されまたは熱的に脱水される、請求項1〜6のいずれか一項に記載の移植片。
- 前記架橋剤が糖、ジアルデヒド、エポキシド、ヒドラジド、またはカルボジイミドを含む、請求項1〜7のいずれか一項に記載の移植片。
- 前記糖が、D−リボース、グリセロース、アルトロース、タロース、エルセオース、グルコース、リキソース、マンノース、キシロース、グロース、アラビノース、イドース、アロース、ガラクトース、マルトース、ラクトース、スクロース、セロビオース、ゲンチオビオース、メリビオース、ツラノース、トレハロース、イソマルトース、またはそれらの任意の組み合わせを含む、請求項8に記載の移植片。
- ステップ(a)の前に、前記胎盤組織移植片を架橋する、請求項1〜9のいずれか一項に記載の移植片。
- 胎盤組織移植片を生産するための方法であって、前記方法は、脱水された胎盤組織移植片を架橋剤と接触させることを含むことを特徴とする方法。
- 請求項1〜10のいずれか一項に記載の組織移植片を含む創傷被覆材。
- 請求項1〜10のいずれか一項に記載の組織移植片を創傷に適用することを含む、対象での創傷治癒を高めるための方法。
- 脳硬膜の修復、歯周形成外科的(perioplastic)処置、小帯牽引の除去、失われた膝蓋骨組織の再生、洞腔中のシュナイダー膜の修復、歯科インプラント周囲の軟組織、口腔前庭形成術、組織再生誘導法においての請求項1〜10のいずれか一項に記載の組織移植片の使用。
- 外科的処置後の脊椎の上または付近の瘢痕形成を予防する又は軽減させるための方法であって、前記方法は、対象に、請求項1〜10のいずれか一項に記載の組織移植片を、対象の脊髄硬膜または脊椎付近の領域に直接適用することを含むことを特徴とする、方法。
- 前記外科的処置が後処置を含む、請求項15に記載の方法。
- 前記後処置が椎弓切除術または椎間板切除術を含む、請求項16に記載の方法。
- 前記後処置が前方腰椎椎体間固定術(ALIF)および経椎間孔椎体間固定術(TLIF)である、請求項16に記載の方法。
- 前記外科的処置が前処置を含む、請求項15に記載の方法。
- 対象での硬膜裂傷を治療するための方法であって、前記方法は、請求項1〜10のいずれか一項に記載の組織移植片を硬膜裂傷に直接適用することを含むことを特徴とする方法。
- 歯科の適用において請求項1〜10のいずれか一項に記載の組織移植片の使用。
- 整形外科の適用において請求項1〜10のいずれか一項に記載の組織移植片の使用。
- 耳鼻咽喉科の適用において請求項1〜10のいずれか一項に記載の組織移植片の使用。
- 眼科の適用(例えば、眼表面修復のオン−レイ(on−lay)移植片)において請求項1〜10のいずれか一項に記載の組織移植片の使用。
- 婦人科の適用において請求項1〜10のいずれか一項に記載の組織移植片の使用。
- 泌尿器科の適用において請求項1〜10のいずれか一項に記載の組織移植片の使用。
- 全身の手術において請求項1〜10のいずれか一項に記載の組織移植片の使用。
- 心臓の適用において請求項1〜10のいずれか一項に記載の組織移植片の使用。
- 形成手術後の瘢痕形成を軽減するまたは予防するための請求項1〜10のいずれか一項に記載の組織移植片の使用。
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