JP2017095493A - 心臓治療のための組成物及び方法 - Google Patents
心臓治療のための組成物及び方法 Download PDFInfo
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Abstract
Description
本出願は、2010年8月24日出願の米国仮特許出願第61/376,654号の利益を主張するものであり、それは、その全体において引用により本明細書に組み込まれる。
本明細書において言及される全ての出版物、特許、及び特許出願は、あたかも個々の出版物、特許、又は特許出願が、引用により組み込まれるべきものと具体的及び個々に示されたかのように同じ程度まで、その全体において引用により本明細書に組み込まれる。
この研究の目的は、インビボでの細胞の粘着、成長、成熟及び送達のための成長プラットフォームとしてゲルの使用を試験することである。本来の心臓細胞外マトリックス組織からなるゲルが、細胞生存の促進により心臓の組織再生を援助できることが規定される。
ここで、細胞コーティングの使用を、脱細胞化され可溶性にされた成人の心室の本来の心臓細胞外マトリックスのために調査した。利点は、本来の心臓ECMが、従来の細胞コーティングより多くの成分を有し、他の細胞タイプによる前処理よりも容易に、使用するために利用可能であり得ることである。
左の下行前動脈の閉塞によって、虚血−再かん流モデルを25分使用して、心筋梗塞をネズミに引き起こした。1週間後MIにて、基線機能をMRI画像から計算した。ブタの心筋のECMを、小片中で、数日間1%のSDSにおいて脱細胞化し、その後、一晩中DIリンスを行い、凍結乾燥及び粉砕を行い、粉末を作成した。消化を、ペプシンを備えた0.1MのHC1中で行い、材料の可溶化した形態を作成した。
拡張終期及び収縮終期の容積も、ECMを注入された動物において保存した。
現在、幹細胞及び他の細胞タイプは、27Gのカテーテルによる心筋の壁への送達による心不全の処置のための、臨床試験中にある。ブタの心室の組織を、SDS洗剤を使用して脱細胞化し、マトリックスの可溶化された形態を形成するために処理し、生理学的なpHにまで中和し、注入のため6mg/mLまで希釈した。
ブタの心室の心筋を脱細胞化し、細胞除去を、冷凍されたばかりの脱細胞化した組織切片のヘマトキシリン及びエオシン(H&E)の染色によって確認する。この脱細胞化手順に従い、ECMを凍結乾燥し、その後、粉砕して微細な微粒子にする。心筋のECM粉末を、タンパク質とプロテオグリカンの同定を可能にする、液体クロマトグラフィー質量分析(LC−MS/MS)を使用して特徴づけた。LC−MS/MSは様々なECMタンパク質を明らかにし、脱細胞化の後に保持されたタンパク質含有量を示した。ECMタンパク質、糖タンパク質、及び同定されたプロテオグリカンは:I型、III型、IV型、V型、及びVI型のコラーゲン、エラスチン、フィブリノーゲン、ルミカン、パールカン、フィビュリン及びラミニンを含む。脱細胞化された心筋のECM内でのこれらの成分の同定は、タンパク質とプロテオグリカンの保持された複合体の組み合わせを示す。
液体の組成物を、NaOHと10XのPBSの追加により生理学的なpHまでもたらし、IX PBSにより、その終濃度にまで希釈した。この時点で、製品をすぐに使用し、又は凍結乾燥し、冷凍保存し、使用前に滅菌水により再水和することができる。
実施例5及び6に従って調製された組成物(この実施例において「組成物」と称する)を、本実施例において使用した。組成物(n=6)又は食塩水(n=6)を、梗塞の2週間後に、メスのSprague DawleyラットのLV自由壁に注入した。磁気共鳴画像(MRI)を使用し、前処置の基線として、MIの1週間後に、及びMIの6週間後に、心臓機能及びLV幾何学を評価した。注入後の4週間でのLV容積及び駆出分画の両方は、組成物を注入された動物における基線測定と統計的に等しいままであったが、一方で、その両方は、表1で実証されるような食塩水の対照動物(saline control animal)において悪化した。注入後の4週間でのLV容積及び駆出分画は、注入された動物における基線測定と統計的に等しいままであったが、一方で、その両方は、食塩水の対照動物において悪化した(図3)。図3は、食塩水(a、b)並びに組成物(c、d)の、注入前及び注入後を実証する(基線と比較して*P<0.05;§P=0.054)。EFと容積において変更された割合において、改善の傾向もあった。
ブタの心室の心筋を脱細胞化し(図4A)、細胞除去を、凍結されたばかりの脱細胞化された組織切片のヘマトキシリン及びエオシン(H&E)の染色によって、Hoechst 33342による染色、及びDNEasyキットによって確認する。この脱細胞化手順の後、ECMを凍結乾燥し、その後、粉砕して、微細な微粒子にする(図4B)。心筋のECM粉末を、タンパク質とプロテオグリカンの同定を可能にする、液体クロマトグラフィー質量分析(LC−MS/MS)を使用して特徴づけた。LC−MS/MSは様々なECMタンパク質を明らかにし、脱細胞化の後に保持されたタンパク質含有量を示した。ECMタンパク質、糖タンパク質、及び同定されたプロテオグリカンは、制限無しで:I型、III型、IV型、V型、及びVI型のコラーゲン、エラスチン、フィブリノーゲン、ルミカン、パールカン、フィビュリン及びラミニンを含む。これらの成分の同定は、タンパク質とプロテオグリカンの保持された複合体の組み合わせを示す。
Claims (13)
- 心臓の組織に由来する消化され脱細胞化された細胞間マトリックスを含む組成物であって、
前記組成物は当該組成物の1mg当たり約5乃至約25μgの範囲の濃度のグリコサミノグリカンを含み、
前記組成物は、消化され脱細胞化された細胞間マトリックスを含む、凍結乾燥されたパウダーから再構成されてなる、ことを特徴とする組成物。 - 内因的な心筋細胞および心臓の細胞の生存を促進する、水、発育因子、合成ポリマー、天然由来のポリマー、セルロース、アルギナート、生物学的適合性の金属又は要素を含む、請求項1に記載の組成物。
- 前記組成物はさらに少なくとも1つの消化酵素を含む請求項1に記載の組成物。
- 前記少なくとも1つの消化酵素はペプシンである請求項3に記載の組成物。
- 前記少なくとも1つの消化酵素はマトリックスを切断して、20℃を超える温度でゲル化し、或いは前記少なくとも1つの消化酵素はマトリックスを切断して、約30分未満でゲル化する請求項3に記載の組成物。
- 消化され脱細胞化された細胞間マトリックスは300未満kDaの分子量の材料を含む請求項1に記載の組成物。
- 消化され脱細胞化された細胞間マトリックスは20未満kDaの分子量の材料を含む請求項1に記載の組成物。
- 前記組成物は当該組成物の1mg当たり約10乃至約20μgの範囲の濃度でグリコサミノグリカンを含む請求項1に記載の組成物。
- 心臓の組織に由来する、消化され脱細胞化された細胞間マトリックスを含む組成物を製造する方法であって、
a.脱細胞化された細胞間マトリックスを得るために細胞外マトリックス成分および非細胞外マトリックス成分を持っている心臓の組織試料を処理する工程;
b.脱細胞化された細胞間マトリックスを凍結乾燥し微粉砕してパウダーにする工程;
c.液体中の脱細胞化された細胞間マトリックスを含む組成物を生成する工程;
d.マトリックス減成酵素を使用して、脱細胞化された細胞間マトリックスを消化する工程;
e.消化され脱細胞化された細胞間マトリックスのpHを中和する工程;及び
f.消化され脱細胞化された細胞間マトリックスを凍結乾燥する工程、
を含んでなる、心臓の組織に由来する、消化され脱細胞化された細胞間マトリックスを含む組成物を製造する方法。 - 前記組成物は当該組成物の1mg当たり約5乃至約25μgの範囲の濃度でグリコサミノグリカンを含む請求項9に記載の方法。
- 前記組成物は当該組成物の1mg当たり約10乃至約20μgの範囲の濃度でグリコサミノグリカンを含む請求項9に記載の方法。
- 請求項9乃至11のいずれか1項に記載の方法で製造された組成物。
- 筋細胞挙動をインビトロで評価する方法であって、
a.細胞間マトリックス上で筋細胞を平板培養する工程;及び
b.コラーゲン・タイプ(I)上に平板培養された筋細胞と比較したとき、アクチニン、コネキシン43およびpan−カドヘリンの少なくとも1つで染色の増加が存在するか否かを判断する工程、
を含んでなる筋細胞挙動を生体外で評価する方法。
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US9789224B2 (en) | 2017-10-17 |
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US20120156250A1 (en) | 2012-06-21 |
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WO2012027514A3 (en) | 2012-06-21 |
EP2608777A2 (en) | 2013-07-03 |
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DK2608777T3 (en) | 2019-10-28 |
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US20180071432A1 (en) | 2018-03-15 |
AU2011293386B2 (en) | 2014-08-21 |
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