JP2018143249A - 工業規模の散布のためのバイオマトリックス足場 - Google Patents
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Abstract
【解決手段】本発明の方法は、結合性マトリックス成分ならびに成熟細胞と幹/前駆細胞細胞集団の系統限定の両方に総合的により再現性があり強力な分化作用を発揮する、マトリックス結合性ホルモン、増殖因子およびサイトカインを含む、組織のコラーゲンの大部分が富化した組織特異的抽出物の製造をもたらす。
【選択図】なし
Description
本願は、35 U.S.C § 119(e)に基づき、2010年7月2日出願の米国仮出願出願番号61/360,939による優先権を主張するものであり、その全内容は、参照により本願に組み込まれる。
本発明の側面は、米国国立衛生研究所(National Institutes of Health)(NIH)助成金番号AA014243およびIP30-DK065933、国立糖尿病・消化器・腎疾病研究所(National Institute of Diabetes and Digestive and Kidney Diseases)(NIDDK)助成金番号DK34987、米国立癌研究所(National Cancer Institute)(NCI)助成金番号CA016086ならびに国立歯科・頭蓋顔面研究所(National Institute of Dental and Craniofacial Research)番号DE019569の下に政府の支援を受けて行われた。アメリカ合衆国政府は本発明に一定の権利を有する。
本発明は、バイオマトリックス足場、バイオマトリックス足場の製造方法および、無傷の足場としてのあるいは特定の実験および臨床用途のために切片化されるかまたは粉砕されさまざまに分散された足場としての、様々な用途におけるバイオマトリックス足場の使用に関する。
ここで、本発明を以下にさらに詳細に説明する。しかしながら、本発明は、他の形態で実施することが可能であり、本発明を本明細書に示す実施形態に限定するものと解釈してはならない。むしろ、これらの実施形態は、本開示を詳細かつ完全なものにするために、かつ本発明の範囲を当業者に十分に伝えるために提供されるものである。
a)本発明の方法によってバイオマトリックス足場を製造し;b)(a)のバイオマトリックス足場と細胞培養培地を培養装置内で接触させ;c)(b)のバイオマトリックス足場に腫瘍細胞を播種し;d)(c)のバイオマトリックス足場を培養条件下に維持し;e)(d)のバイオマトリックス足場での腫瘍細胞集団を確立すること;を含み、それによって宿主動物への移植のための腫瘍移植片を製造する前記方法を提供する。いくつかの実施形態において、本方法は、宿主動物に腫瘍移植片を移植する段階をさらに含むことができる。種々の実施形態において、腫瘍移植片は宿主動物に対して同系、同種または異種であることができる。
組織特異的バイオマトリックス足場によって、ヒト肝幹細胞の成熟運命への系統限定が効率的となる
要約。幹細胞の分化のための現行のプロトコルは、可溶性シグナルおよび/またはマトリックス因子の複数の処理を利用し、一般的には、成人組織特異的遺伝子の過小発現または過剰発現を伴う成熟細胞への部分的分化をもたらす。本発明において、目的とする成人細胞型に合わせた、無血清ホルモン添加培地(HDM)と組み合わせた、バイオマトリックス足場の基材である細胞外マトリックスの富化した組織特異的抽出物と関連する増殖因子およびサイトカインとを用いる、幹細胞の迅速かつ効率的な分化のための戦略が開発された。本明細書に記載の研究は、ヒト肝幹細胞(hHpSC)を成熟運命に分化させることおよび、成熟実質細胞を完全に機能するように長期間維持することにおける本発明のバイオマトリックス足場の有効性を明らかにしている。バイオマトリックス足場は、すべてのコラーゲンタイプを不溶性に保つように設計された条件を用いる新規4段階潅流脱細胞化プロトコルによって製造された。この足場は、天然組織構造、親血管、おおよそ1%の組織タンパク質(ただし組織のコラーゲンは95%を超える)、組織のコラーゲン結合性マトリックス成分の大部分ならびに生理的レベルのマトリックス結合性増殖因子およびサイトカインを維持していた。コラーゲンは、ほとんど検出できないレベルから足場のタンパク質の15%を超えるレベルまで増加し、残りは、組織構造と関連したパターンでラミニン、フィブロネクチン、エラスチン、ナイドジェン/エンタクチン、プロテオグリカンならびにマトリックス結合性サイトカインおよび増殖因子を含んでいた。肝臓バイオマトリックス足場に播種され、成人肝臓細胞に合わせたHDMに入れられたヒト肝幹細胞(hHpSC)は、おおよそ1週間で幹細胞マーカーを消失し、機能しうる成熟実質細胞に分化し、8週間を超えて生存し、安定な成熟細胞表現型を維持していた。従って、本発明のバイオマトリックス足場は、系統が限定された幹細胞の生物学的および医薬研究に、成熟細胞の維持に、そして操作された植込み型血管化組織または臓器に用いることができる。
(1).潅流洗浄および潅流リンス:無血清基礎培地(例えば、RPMI-1640);
(2).洗浄剤での潅流:36単位/L PLA2+1%SDC;
(3).高塩での潅流:0.1mg/ml大豆トリプシンインヒビターを含む3.4M NaCl;
(4).ヌクレアーゼでの潅流:5mg/100ml RNアーゼ、1mg/100ml DNアーゼおよび0.1mg/ml大豆トリプシンインヒビター(例えば、RPMI 1640で調製)。
1)培養選択。10cm組織培養ディッシュのKM中におおよそ3x105細胞をプレーティングした。培地を3日毎に交換した。コロニーは5〜7日以内に形成され、これを3ヶ月目まで観察した。14〜18日後に、倒立顕微鏡(1X-FLAIII;Olympus社、日本およびメルヴィル、ニューヨーク)を用いて、コロニーを手で拾った。
2)多能性肝前駆細胞サブ母集団(hHpSCおよびhHB)の磁気免疫選択は、製造業者による使用説明書50に従って、Miltenyi Biotech MACSシステム(ベルギッシュ・グラートバッハ、ドイツ)による磁性ビーズ免疫選択技術を用いて、上皮細胞接着分子(EpCAM、CD326)に陽性な細胞を選択することによって達成した。簡潔に言えば、磁気マイクロビーズに結合させたEpCAM抗体と共に解離した細胞を4℃で30分間インキュベートし、製造業者の推奨する手順に従って、Miltenyi製の磁気カラム分離システムを用いて分離した。
バイオマトリックス足場の工業規模の散布のための方法
GigaCyte, LLC社(ブランフォード、コネチカット州)において、粉砕後にディッシュ上にバイオマトリックス足場を散布する追加の方法が開発された。大きな哺乳動物を含む任意の組織(例えば、ヒト、ブタ、ウシ組織など)からのバイオマトリックス足場を用いることができる。ブタおよびウシの組織は、USDA認定食肉処理施設から入手し、RPMI 1640に移した。この培地は、間質液の成分を真似する組成を有し、250〜350mOsm/Kgの範囲の重量オスモル濃度を有する任意の培地であることができる。次いで、本明細書に記載されるように組織を処理して、バイオマトリックス足場を製造する。
1000x大豆トリプシンインヒビター
・最終濃度0.1mg/ml
組織輸送用溶液
・RPMI 1640またはカルシウムおよびマグネシウムを含むリン酸緩衝化生理食塩水などの基礎培地
・抗生物質/抗真菌薬100x溶液(Gibco#15240-112)
・ゲンタマイシン(25ug/ml)(Gibco#15710-072)
溶液1:組織混合用溶液
・3.4M NaCl
・0.1mg/ml大豆トリプシンインヒビター(Gibco#17075-029)
溶液2:脱脂溶液
・溶液1と1:1PBS(w/Ca&Mg)との混合物(1:2、1:3、1:4の比率も選択できる)あるいはRPMI 1640などの基礎培地
・0.1%デオキシコール酸ナトリウム(Sigma D6750-100g)
・36u/LホスホリパーゼA2(Sigma P9279-25mg)
・0.1mg/ml大豆トリプシンインヒビター(Gibco#17075-029)
溶液3:ヌクレアーゼ溶液
・RPMI 1640などの基礎培地
・5mg/100ml RNアーゼ(Sigma R6513-1g)
・1mg/100ml DNアーゼ(DN25-1g)
・0.1mg/ml大豆トリプシンインヒビター
溶液4:高塩溶液
・3.M NaCl
溶液5:塩の除去&粉砕溶液
・ウイリアムE
・抗生物質/抗真菌薬(100x)
・ゲンタマイシン(30ug/ml)
大きな臓器のためのバイオマトリックス単離プロセス段階
1.高塩での組織のホモジナイズ
2.脱細胞化および脱脂
3.ヌクレアーゼ除去
4.高塩洗浄
5.塩の除去
6.バイオマトリックスの粒度減少
7.バイオマトリックスでのプレートのコーティング
1.0 組織破砕
1.1 USDA認定食肉処理施設から臓器組織を入手
1.2 USDA施設からGigaCyte研究室まで、プラスチック容器に入れた組織輸送用溶液に入れた臓器組織を輸送
1.3 潅流またはホモジナイズのために組織を調製
1.3.1 マルチウェルプレートでのin vitro用途にホモジナイズは好ましい
2.0 組織のホモジナイズ
2.1 無菌的に、手術用ナイフNo.22で組織を小片(〜3x3cm)に切断し、組織輸送用溶液に入れて血液を除く
2.2 組織片を組織輸送用溶液に入れて3〜4回リンスし、血液をできるだけ除く
2.3 〜400gの組織を同容量の溶液1中で混合物が均一になるまで(〜3〜5分間)ホモジナイズする
2.4 脱細胞化のために、ホモジナイズした組織溶液を2Lのローラーボトルに注ぐ
2.5 組織片の全バッチに関して繰り返す
3.0 脱細胞化および脱脂
3.1 同容量の溶液2を加えて、ローラーボトル中で組織をホモジナイズする
3.2 ボトル数回逆さにすることによって十分に混合し、次いで15〜30分間放置する
3.3 浮揚性のあるマトリックス物質は上部まで上昇し、肝臓色の溶液の上部に明るいマトリックス物質の明瞭な分離が生じる
3.4 浮揚性のあるマトリックス物質をピペットで吸い取り、他のローラーボトルに移す
3.5 複数のホモジナイズからのマトリックスをプールする
3.6 〜375mlマトリックス物質を750ml遠心ボトルに移し、各ボトルに同容量の溶液2を加え、〜1分間激しく振り動かして、十分な脱細胞化および脱脂を確実にする
3.7 高速度(3750RPM)で10分間遠心分離してペレット化し、次いで上清を除く
3.8 このプロセスをもう一回繰り返す(全部で2回)
4.0 ヌクレアーゼ除去
4.1 最終脱細胞化洗浄後に、バイオマトリックスペレットを乱さないように注意して上清を取り除く
4.2 各ボトルに同容量の溶液3を加え、1分間激しく振り動かして、すべての材料が懸濁液中にあり、ヌクレアーゼが完全に除去されるのを確実にする
4.3 高速度(3750RPM)で10分間遠心分離してペレット化し、次いで上清を取り除く
4.4 このプロセスをもう一回繰り返す(全部で2回)
5.0 高塩洗浄
5.1 最終ヌクレアーゼ洗浄後に、バイオマトリックスペレットを乱さないように注意して上清を取り除く
5.2 各ボトルに同容量の溶液4を加え、すべての材料が懸濁液中にあることを確実にするように注意して激しく振り動かす
5.3高速度(3750RPM)で10分間遠心分離してペレット化し、次いで上清を取り除く
5.3.1 この段階では、バイオマトリックスは十分にペレット化せず、遠心分離後に浮揚性がある
5.3.2 ピペットで上清を取り除き、ナイロンフィルターに通過させて浮揚性のある材料を回収する
5.3.3 採取した浮揚性のあるマトリックスを遠心ボトルに戻す
5.4 停止の前に、このプロセスを少なくとも2回繰り返す
5.4.1 最終の塩洗浄後に上清はわずかに黄褐色から澄明である
5.5 2回目の高塩洗浄後は、遅めの時間の場合は、良い停止点である
5.6 すべての遠心ボトルの内容物を1つのローラーボトルに注ぎ、溶液4を上部まで継足し、次いでバイオマトリックスを4℃で終夜放置する
5.7 翌日、残りの塩洗浄を続ける
5.8 バイオマトリックスボトルを激しく振り動かしてバイオマトリックス材料を十分に混合し、次いでバイオマトリックスを遠心ボトルに移し、3〜4回さらに塩洗浄を続ける
5.9 できるだけ少ないボトルにバイオマトリックスを圧縮し、塩洗浄が可能なように、それぞれ最大の半分まで充填する
6.0 塩の除去
6.1 最終塩洗浄後に、バイオマトリックスペレットを乱さないように注意して上清を取り除く
6.2 同容量の溶液5を加え、激しく振り動かして、すべてのバイオマトリックス材料が懸濁液中にあることを確実にする
6.3 高速(3750RPM)で10分間遠心分離してペレット化し
6.4. 上清を取り除き、同容量の溶液5を加え、ついで激しく振り動かす
6.5. 2回繰り返して(合計で3回)、上清が澄明であることを確実にする
6.5.1 バイオマトリックスは、各遠心分離によってさらにしっかりとペレット化する
6.5.2 最終洗浄後に色は無く、上清は澄明なはずである
6.6 最終の溶液5洗浄後に、各ボトルからのマトリックスペレットの容量を記録する
6.7 移し、すべてのバイオマトリックスペレットを新規のローラーボトルにプールする
6.8 バイオマトリックス材料の容量を測定する
6.9 プールしたバイオマトリックスを溶液5で1:6に希釈する
6.9.1 必要な溶液5の量を算出する
6.9.1.1 例:200mlバイオマトリックスx6=1,200
6.9.1.2 1Lの溶液5を200mlのバイオマトリックスに加えて1:6のバイオマトリックス懸濁液を調製する
6.10 30mlバイオマトリックスの1:6懸濁液を等分して前もってレベルしたフリーザーバッグに入れる
6.11 バイオマトリックスのバッグを-80℃で凍結させ、粉砕するまで保存する
6.12 新規バイオマトリックスロットのために“バイオマトリックスロット粉砕データシート”を作成する
6.12.1 この新規バッチから製造されたバッグの番号を記録する
6.12.2 各バッグは、同じロットからの別々のすりつぶしである
6.13 このバッチから製造されたバイオマトリックス材料は1つのロットとみなす
6.14 バッチにロット番号を割り当てる
7.0 バイオマトリックスの粒度減少
7.1 LN2を有する粉砕ミル(Spex Sample Prep 6870)を準備し、粉砕チャンバーを冷やす
7.2 フリーザーから凍結したバイオマトリックスバッグを取り除く
7.3 小片に砕く
7.4 凍結したバイオマトリックス片を予備冷却した粉砕ミルチャンバーに移す
7.5 クライオミルにおいて、それぞれ48分、粉砕を2回運転する(1回の運転は、12x2分の粉砕であり、それぞれ2分間のクールダウンが続く)
7.6 粉砕されたバイオマトリックスを、ロット番号およびバッグ番号(バッグ番号により、粉砕した日がわかる)が前もってラベルされた100mlのボトルに移す
7.7 プレートのコーティングの準備ができるまで、-80℃で凍結しておく
8.0 プレートのコーティングのためのバイオマトリックスの製造
8.1 37℃の水浴中で迅速解凍法でバイオマトリックスのボトルの1つを解凍する
8.2 解凍したバイオマトリックス懸濁液を測定する(〜30ml±2mlのはずである)
8.3 溶液5で1:24に希釈(図17を参照)
8.3.1 1:6バイオマトリックス懸濁液に加えるための溶液5の容量を算出する
8.3.1.1 バイオマトリックス懸濁液の容量に3を掛ける
8.3.1.2その容量を、1:24希釈のために1:6懸濁液に加える
8.4直ちにプレートをコーティングする(希釈したバイオマトリックスを放置すると凝集が生じる)
9.0バイオマトリックスでのプレートのコーティング
9.1コーティングされるプレート数を決定する。プレーティング容量に関して表8を参照する
・パッケージングからプレートを無菌的に取り除き、層流フード内に配置する
・必要に応じて多チャネルピペットを用い、各ウェルにバイオマトリックス懸濁液の適切な量を移す。プレーティング容量に関しては、表1を参照する
・必要に応じて、懸濁液をウェルタッププレートに均等に分配されるのを確実にするが、フードの平らな表面からは除去しない
・終夜、プレートをそのままにしておく
・翌日、最初に各ウェルから溶液を取り除く
マトリックスコーティングが乱れないように注意深くプレートを扱う
フードの表面からプレートの縁を取り除くことなく、プレートをあなたの方に傾ける。これにより、バイオマトリックスがプレートから落下する痙攣様の動きを防ぐためにプレートを安定化する
小さなチップピペットを備えた吸引装置を用いて、各ウェルから全溶液を吸引する。ピペットでマトリックス表面に触れないこと!!!
プレートを穏やかに置き、ふたを取り除き、十分に乾燥させる(〜2時間)
まだ湿った状態でプレートを動かすと、バイオマトリックスコーティングが乱れる
マトリックスが乾燥するまでプレートを動かさないこと
十分に乾燥したら、ふたを戻し、品質を試験する
なめらかなコーティングを有するプレートをプレートポーチに置く
ポーチにシールをし、ラベルを貼る
γ線照射(5,000rad)で滅菌する
コーティングしたプレートを4℃で保存する
コーティングしたプレートをパックを氷冷しながら、5のパックにして発送する
10.0 バイオマトリックスプレートの使用
10.1 パッケージングからプレートを無菌的に取り除き、生物学的安全キャビネットに置く
10.2 各ウェルに培地を加え、使用前に少なくとも2時間インキュベーターに入れる
10.3 細胞をプレーティングする準備ができたら、再水和培地を取り除き、組織培養培地で1回洗浄する
10.4細胞を加える
〔1〕培養装置への工業規模の散布のための、生体組織からのバイオマトリックス足場の製造方法であって、
a)塩濃度約3.5M NaCl〜約4.5M NaClを含む緩衝液で生体組織を灌流するかまたは生体組織をホモジナイズし;
b)第1培地にリパーゼおよび/または洗浄剤を含む脱脂緩衝液で段階(a)の生体組織を灌流するかまたは段階(a)のホモジネートを抽出し、ここで前記第1培地の重量オスモル濃度は約250mOsm/kg〜約350mOsm/kgであり、前記第1培地は無血清かつ中性pHであり;
c)中性pHかつ約2.0M NaCl〜約5.0M NaClの塩濃度であって、生体組織内で同定されるコラーゲンを不溶性に保つように選択された塩濃度を含む緩衝液で段階(b)の組織を灌流するかまたは段階(b)のホモジネートを抽出し;
d)緩衝液中、RNアーゼおよびDNアーゼで段階(c)の組織を灌流するかまたは段階(c)のホモジネートを抽出し;
e)中性pHかつ無血清であり、約250mOsm/kg〜約350mOsm/kgの重量オスモル濃度を有する第2培地で段階(d)の組織またはホモジネートをリンスし、それによって、生体組織から、無傷のまたはホモジナイズしたバイオマトリックス足場であって、コラーゲンの少なくとも95%および生体組織のコラーゲン結合性マトリックス成分およびマトリックス結合性増殖因子、ホルモンおよびサイトカインの大部分を含む前記足場を製造し;
f)基礎培地でバイオマトリックス足場を希釈し;
g)約-80℃で(f)のバイオマトリックス足場を凍結し;
h)大きさが約1μm〜約100μmのバイオマトリックス粒子に低温粉砕することによって(g)のバイオマトリックス足場を粉砕し;
i)(h)のバイオマトリックス粒子を基礎培地中、懸濁状態で解凍し;
j)段階(i)のバイオマトリックス粒子を培養装置に散布すること
を含み、それによって、培養装置への工業規模の散布のための、生体組織からのバイオマトリックス足場を製造する前記方法。
〔2〕バイオマトリックス足場を滅菌する段階をさらに含む、前記〔1〕に記載の方法。
〔3〕滅菌する段階がγ線照射によって行われる、前記〔3〕に記載の方法。
〔4〕(f)のバイオマトリックス足場が約1:6比で基礎培地に希釈される、前記〔1〕に記載の方法。
〔5〕(i)のバイオマトリックス粒子が約1:24比で基礎培地に希釈される、前記〔1〕に記載の方法。
〔6〕第1培地が塩、ミネラル、アミノ酸、ビタミンおよび糖を含む、前記〔1〕に記載の方法。
〔7〕第1培地が基礎培地である、前記〔1〕に記載の方法。
〔8〕基礎培地がRPMI1640、DME/F12、DME、F12、ウェイマウス培地およびウィリアム培地からなる群から選択される、前記〔7〕に記載の方法。
〔9〕第2培地が、間質液に存在する成分の少なくとも1つを含む、前記〔1〕に記載の方法。
〔10〕段階(b)の脱脂緩衝液が、第1培地に、約20単位/L〜約50単位/LのホスホリパーゼA2および約1%のデオキシコール酸ナトリウムを含む、前記〔1〕に記載の方法。
〔11〕段階(c)の緩衝液の塩濃度が、成人肝臓からの足場製造に用いる場合、約3.4M NaCl〜約3.5M NaClであり、胎児肝臓からの足場製造に用いる場合、約4.0M NaCl〜約4.5M NaClである、前記〔1〕に記載の方法。
〔12〕段階(c)の緩衝液が、プロテアーゼインヒビターをさらに含む、前記〔1〕に記載の方法。
〔13〕プロテアーゼインヒビターが大豆トリプシンインヒビターである、前記〔12〕に記載の方法。
〔14〕段階(d)の緩衝液が、プロテアーゼインヒビターをさらに含む、前記〔1〕に記載の方法。
〔15〕プロテアーゼインヒビターが大豆トリプシンインヒビターである、前記〔13〕に記載の方法。
〔16〕段階(a)〜(e)のすべての培地および緩衝液が、細胞外マトリックス成分を分解する酵素の検出可能な量を含まない、前記〔1〕に記載の方法。
〔17〕生体組織が、肝臓組織、肺組織、膵臓組織、甲状腺組織、腸管組織、皮膚組織、血管組織、膀胱組織、心臓組織および腎組織からなる群から選択される、前記〔1〕に記載の方法。
〔18〕生体組織が哺乳動物由来である、前記〔1〕に記載の方法。
〔19〕前記〔1〕〜〔18〕のいずれかに記載の方法によって製造されるバイオマトリックス足場。
Claims (19)
- 培養装置への工業規模の散布のための、生体組織からのバイオマトリックス足場の製造方法であって、
a)塩濃度約3.5M NaCl〜約4.5M NaClを含む緩衝液で生体組織を灌流するかまたは生体組織をホモジナイズし;
b)第1培地にリパーゼおよび/または洗浄剤を含む脱脂緩衝液で段階(a)の生体組織を灌流するかまたは段階(a)のホモジネートを抽出し、ここで前記第1培地の重量オスモル濃度は約250mOsm/kg〜約350mOsm/kgであり、前記第1培地は無血清かつ中性pHであり;
c)中性pHかつ約2.0M NaCl〜約5.0M NaClの塩濃度であって、生体組織内で同定されるコラーゲンを不溶性に保つように選択された塩濃度を含む緩衝液で段階(b)の組織を灌流するかまたは段階(b)のホモジネートを抽出し;
d)緩衝液中、RNアーゼおよびDNアーゼで段階(c)の組織を灌流するかまたは段階(c)のホモジネートを抽出し;
e)中性pHかつ無血清であり、約250mOsm/kg〜約350mOsm/kgの重量オスモル濃度を有する第2培地で段階(d)の組織またはホモジネートをリンスし、それによって、生体組織から、無傷のまたはホモジナイズしたバイオマトリックス足場であって、コラーゲンの少なくとも95%および生体組織のコラーゲン結合性マトリックス成分およびマトリックス結合性増殖因子、ホルモンおよびサイトカインの大部分を含む前記足場を製造し;
f)基礎培地でバイオマトリックス足場を希釈し;
g)約-80℃で(f)のバイオマトリックス足場を凍結し;
h)大きさが約1μm〜約100μmのバイオマトリックス粒子に低温粉砕することによって(g)のバイオマトリックス足場を粉砕し;
i)(h)のバイオマトリックス粒子を基礎培地中、懸濁状態で解凍し;
j)段階(i)のバイオマトリックス粒子を培養装置に散布すること
を含み、それによって、培養装置への工業規模の散布のための、生体組織からのバイオマトリックス足場を製造する前記方法。 - バイオマトリックス足場を滅菌する段階をさらに含む、請求項1に記載の方法。
- 滅菌する段階がγ線照射によって行われる、請求項3に記載の方法。
- (f)のバイオマトリックス足場が約1:6比で基礎培地に希釈される、請求項1に記載の方法。
- (i)のバイオマトリックス粒子が約1:24比で基礎培地に希釈される、請求項1に記載の方法。
- 第1培地が塩、ミネラル、アミノ酸、ビタミンおよび糖を含む、請求項1に記載の方法。
- 第1培地が基礎培地である、請求項1に記載の方法。
- 基礎培地がRPMI1640、DME/F12、DME、F12、ウェイマウス培地およびウィリアム培地からなる群から選択される、請求項7に記載の方法。
- 第2培地が、間質液に存在する成分の少なくとも1つを含む、請求項1に記載の方法。
- 段階(b)の脱脂緩衝液が、第1培地に、約20単位/L〜約50単位/LのホスホリパーゼA2および約1%のデオキシコール酸ナトリウムを含む、請求項1に記載の方法。
- 段階(c)の緩衝液の塩濃度が、成人肝臓からの足場製造に用いる場合、約3.4M NaCl〜約3.5M NaClであり、胎児肝臓からの足場製造に用いる場合、約4.0M NaCl〜約4.5M NaClである、請求項1に記載の方法。
- 段階(c)の緩衝液が、プロテアーゼインヒビターをさらに含む、請求項1に記載の方法。
- プロテアーゼインヒビターが大豆トリプシンインヒビターである、請求項12に記載の方法。
- 段階(d)の緩衝液が、プロテアーゼインヒビターをさらに含む、請求項1に記載の方法。
- プロテアーゼインヒビターが大豆トリプシンインヒビターである、請求項13に記載の方法。
- 段階(a)〜(e)のすべての培地および緩衝液が、細胞外マトリックス成分を分解する酵素の検出可能な量を含まない、請求項1に記載の方法。
- 生体組織が、肝臓組織、肺組織、膵臓組織、甲状腺組織、腸管組織、皮膚組織、血管組織、膀胱組織、心臓組織および腎組織からなる群から選択される、請求項1に記載の方法。
- 生体組織が哺乳動物由来である、請求項1に記載の方法。
- 請求項1〜18のいずれかに記載の方法によって製造されるバイオマトリックス足場。
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