JP7559144B2 - 脂肪組織製品および製造方法 - Google Patents
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- A61L27/3604—Materials for grafts or prostheses or for coating grafts or prostheses containing ingredients of undetermined constitution or reaction products thereof, e.g. transplant tissue, natural bone, extracellular matrix characterised by the human or animal origin of the biological material, e.g. hair, fascia, fish scales, silk, shellac, pericardium, pleura, renal tissue, amniotic membrane, parenchymal tissue, fetal tissue, muscle tissue, fat tissue, enamel
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- A61L27/3683—Materials for grafts or prostheses or for coating grafts or prostheses containing ingredients of undetermined constitution or reaction products thereof, e.g. transplant tissue, natural bone, extracellular matrix subjected to a specific treatment prior to implantation, e.g. decellularising, demineralising, grinding, cellular disruption/non-collagenous protein removal, anti-calcification, crosslinking, supercritical fluid extraction, enzyme treatment
- A61L27/3691—Materials for grafts or prostheses or for coating grafts or prostheses containing ingredients of undetermined constitution or reaction products thereof, e.g. transplant tissue, natural bone, extracellular matrix subjected to a specific treatment prior to implantation, e.g. decellularising, demineralising, grinding, cellular disruption/non-collagenous protein removal, anti-calcification, crosslinking, supercritical fluid extraction, enzyme treatment characterised by physical conditions of the treatment, e.g. applying a compressive force to the composition, pressure cycles, ultrasonic/sonication or microwave treatment, lyophilisation
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- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/40—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material
- A61L27/44—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material having a macromolecular matrix
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Description
脂肪組織マトリックス材料を製造するために、ブタ脂肪組織を最初に2インチのストリップにスライスし、食品グレードのミートチョッパで粗く細断した。細断した脂肪組織は、さらに処理する準備ができていない場合は、-80℃で凍結するようにしてもよい。凍結材料は、一晩で室温または4℃で解凍することができる。前処理した材料は、RETSCH(登録商標)GM300(GRINDOMIX)により2000rpmで粗粉砕し、その後、4000rpmでさらに粉砕して、固体マトリックスからオイルの相分離を行った。脂肪マトリックス固形分を遠心分離により採取し、緩衝液で洗浄した。マトリックス材料を、室温で一晩、EDTA-Triton溶液で脱細胞化し、4時間毎に溶液を交換した。マトリックスタンパク質を再び洗浄した。洗浄中、マトリックスペレットを遠心分離して組織マトリックスをペレット化し、使用済み溶液をデカントした。懸濁液を再び機械的に粉砕して、マトリックス繊維をさらに分解した。洗浄後、マトリックスペレットを、約2~3%w/wの固形分濃度で20%のPBSに再懸濁した。スラリーを金属トレイに入れ、凍結乾燥してスポンジを形成し、DHT処理を行って材料を安定化させた。その後、安定化させたスポンジを粉砕して、篩にかけ、流動性/注入可能なブタ無細胞組織スラリー(PATS)材料として所望のサイズの粒子を得た。粒子状物質は、5~15%のペーストになり、電子ビームによる最終滅菌を受けた。
上記プロセスで製造した組織製品を、走査型電子顕微鏡(SEM)および原子間力顕微鏡(AFM)による分析にかけた。その結果は、組織製品が、図6に示すように、構造、多孔性などを含む典型的なコラーゲンバンディングパターンを有するコラーゲン材料を含む多孔性足場であることを示していた。顕微鏡は、正常なバンディングパターンを持つ無傷のコラーゲンを示している。
説明したように製造したサンプルは、図8Aに示すように、ヘマトキシリンおよびエオシン染色(「H&E」)を受け、図8Bに示すように、DNAおよび脂質含量分析を受け、(組織マトリックス対天然脂肪対照を示す)図8Cに示すように、MHCIおよびII成分の免疫染色を受けた。H&E組織学では、組織製品が細胞の兆候のない多孔質構造を示した。この観察結果と一致して、組織製品の残留DNAと遊離オイルは非常に少なくなっていた。免疫染色により、組織製品はMHC-1およびII染色の効果がなく、記載のプロセスが脱細胞化に効率的であることを示している。
組織を、I型、III型およびIV型を含む主要な細胞外マトリックスタンパク質の免疫組織学的分析にかけた。図9を参照すると、脂肪組織製品(下段)は、天然脂肪マトリックス(上段)の元の特性を保持していた。
組織製品スポンジが脂肪組織、脈管構造、および真皮組織のような他の結合組織の成長を支援する潜在能力があるかどうかを試験するために、3つの異なる細胞タイプを選択した。具体的には、脂肪生成間葉系幹細胞、内皮細胞および真皮線維芽細胞など、正常なヒト個体から単離した一次細胞をすべて試験した。それら組織から単離した細胞を組織製品に播種し、1、7、16日間培養した。細胞増殖は、細胞増殖アッセイキットで定量化した。CyQUANT(登録商標)Cell Proliferation Assay Kitを使用して、蛍光色素によりDNA含有量で細胞増殖を定量化した。組織製品を細胞増殖について分析した。図10に示すように、細胞播種足場が生死染色液で染色され、蛍光顕微鏡下で細胞の生存率と成長が観察された。組織製品は、インビトロで3種類すべての細胞増殖を支援する。
製品の生物学的性能を、皮下ヌードラットモデルで試験した。図11に示すように、この研究は製品の様々な配合を試験するために設計した。
図15は、1.5年間保存された組織マトリックスと比較した、新鮮な脂肪組織マトリックスの画像を提供しており、両方とも実施例Aに記載されるように調製されたものである。それら画像は様々な倍率で提供されている。図示のように、10%の固形物を含む湿潤構成の脂肪組織マトリックス材料は、1.5年間の保存後に凝集体を形成した。生物学的試験は、凝集がヌードラットの皮下領域における体積保持や脂肪組織の内殖などの材料の生物学的性能に影響を与えないことを示している。しかしながら、臨床環境での非侵襲的送達の場合、10%の脂肪組織製品には注入性を促進するために担体が必要になることがある。
Claims (15)
- 組織製品組成物であって、
多孔質スポンジに形成された後に粒子状組織組成物に形成された脂肪無細胞組織マトリックスを含み、前記粒子状組成物が、5重量%~15重量%の脂肪組織マトリックスの粒子を含み、当該粒子は、当該粒子が製造された前記多孔質スポンジに由来する微多孔質構造を含むことを特徴とする組織製品組成物。 - 請求項1に記載の組織製品組成物において、
前記粒子が、乾燥していることを特徴とする組織製品組成物。 - 請求項1または2に記載の組織製品組成物において、
当該組成物が、5重量%~15重量%の固体の脂肪無細胞組織マトリックスを含むことを特徴とする組織製品組成物。 - 請求項1乃至3のいずれか1項に記載の組織製品組成物において、
前記粒子が、0.05mm~4mmの最長寸法を有することを特徴とする組織製品組成物。 - 請求項4に記載の組織製品組成物において、
脂肪組織マトリックスの前記粒子が、50ミクロン~4mmの最長寸法を有することを特徴とする組織製品組成物。 - 請求項4に記載の組織製品組成物において、
脂肪組織マトリックスの前記粒子が、1mm~1.5mmの最長寸法を有することを特徴とする組織製品組成物。 - 請求項4に記載の組織製品組成物において、
脂肪組織マトリックスの前記粒子が、2mm~3.5mmの最長寸法を有することを特徴とする組織製品組成物。 - 請求項1に記載の組織製品組成物において、
脂肪組織マトリックスの前記粒子が、2mm~3mmの最長寸法を有することを特徴とする組織製品組成物。 - 請求項1に記載の組織製品組成物が、さらに、流動性担体を含むことを特徴とする組織製品組成物。
- 請求項9に記載の組織製品組成物において、
前記流動性担体が、水性流体を含むことを特徴とする組織製品組成物。 - 請求項10に記載の組織製品組成物において、
前記流動性担体が、生理食塩水を含むことを特徴とする組織製品組成物。 - 請求項10または11に記載の組織製品組成物において、
当該組成物が、80重量%~95重量%の水を含むことを特徴とする組織製品組成物。 - 請求項9または10に記載の組織製品組成物において、
前記流動性担体が、流動性ヒアルロン酸担体であることを特徴とする組織製品組成物。 - 請求項13に記載の組織製品組成物において、
ヒアルロン酸が、架橋されていないことを特徴とする組織製品組成物。 - 請求項13に記載の組織製品組成物において、
ヒアルロン酸が、架橋されていることを特徴とする組織製品組成物。
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EP3697460A1 (en) * | 2017-10-18 | 2020-08-26 | LifeCell Corporation | Adipose tissue products and methods of production |
US11246994B2 (en) | 2017-10-19 | 2022-02-15 | Lifecell Corporation | Methods for introduction of flowable acellular tissue matrix products into a hand |
CN111225690A (zh) | 2017-10-19 | 2020-06-02 | 生命细胞公司 | 可流动无细胞组织基质产品以及产生方法 |
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CA3075099A1 (en) | 2019-04-25 |
AU2018351051A1 (en) | 2020-03-19 |
CN111201046A (zh) | 2020-05-26 |
JP7297739B2 (ja) | 2023-06-26 |
EP3697460A1 (en) | 2020-08-26 |
AU2024205150A1 (en) | 2024-08-15 |
US20190111183A1 (en) | 2019-04-18 |
US20250065018A1 (en) | 2025-02-27 |
US10821205B2 (en) | 2020-11-03 |
CN111201046B (zh) | 2022-06-28 |
CN115252910A (zh) | 2022-11-01 |
US20210038767A1 (en) | 2021-02-11 |
WO2019079570A1 (en) | 2019-04-25 |
JP2023123578A (ja) | 2023-09-05 |
JP2021500091A (ja) | 2021-01-07 |
JP2025011092A (ja) | 2025-01-23 |
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