JP6902788B2 - インビトロ線維症モデル、その製造方法及び該用途 - Google Patents
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Description
(1)インビトロ線維症モデル製造
(1.1)ヒト脂肪幹細胞(hASC:human adipose stem cell)の分離
カトリック大学整形外科研究室から分譲された健常人の皮下脂肪組織を、1%ペニシリン/ストレプトマイシン(PS)を含むPBSで3回洗浄し、汚染した血液を除去した後、手術用はさみで細かく切った(chopping)。該脂肪組織を、1% BSA(w/v)、0.3%コラゲナーゼタイプ1、及び1% PSを含む組織溶解液(DMEM/F−12、ウェルジン)に浸し、1時間37℃で撹拌した(orbital shaking)。その後、上澄み液は捨て、細胞懸濁液を250μm Nitexフィルタ(Sefar America Inc.)で濾過し、組織破片(debris)を除去し、1,000rpmで5分間遠心分離した。遠心分離によって収集された細胞を、10% BSAを含むDMEM/F−12に再懸濁した。分離された一次細胞を、5% CO2及び95%空気を有する37℃の湿潤な大気において、24時間組織培養フラスコ(tissue culture flask)にプレートした。その後、非付着性細胞を、同一体積の新鮮な培地で交換することによって除去した。付着性hASCの形態を、位相差顕微鏡で観察し、5継代のhASCを全ての実験に使用した。
前記得られた脂肪幹細胞から、三次元細胞集合体を製造するために、前記脂肪幹細胞を、非組織細胞培養用96ウェルプレート(NTCP:non-tissue culture treated 96−well plate;ポリスチレン材質で表面が疎水性を帯びる、Falcon社)で培養した。前記プレートは、融合タンパク質MBP(maltose binding protein)−FGF(fribroblast growth factor)がコーティングされたプレートであり、前記融合タンパク質がコーティングされたプレートについては、大韓民国特許第1109125号に記載されており、本明細書に全体が参照として含まれる。具体的には、前記ウェルプレートに、ウェル当たり1×105細胞/cm2の脂肪幹細胞を接種した後、10% FBS含有DMEM/F−12培地で培養した。培養24時間以内に、各細胞接着表面において、脂肪幹細胞の三次元細胞集合体が形成された。前記形成された三次元細胞集合体に対する線維症モデル特性分析のために、培養1日目(1day)、3日目(3day)及び5日目(5day)の三次元細胞集合体を収集した。また、前記三次元細胞集合体は、約500μm以上の直径を有すると確認された。以下、三次元細胞集合体を「3DCM」と表示する。
(2.1)脂肪幹細胞由来の三次元細胞集合体の特性分析
脂肪幹細胞由来の三次元細胞集合体の形態学的特性を分析するために、走査電子顕微鏡及びH&E染色を行った。また、前記三次元細胞集合体内部の低酸素状態を確認するために、免疫染色を行った。
TGFベータは、線維症の主要分子であり、低酸素条件によって誘導され、脂肪幹細胞由来の三次元細胞集合体において、線維症関連因子が発現される否かということを確認するために、TGFベータを含んだ線維症関連因子に対して、ELISAを行った。
脂肪幹細胞由来の三次元細胞集合体の総コラーゲン沈着を分析するために、免疫蛍光染色、免疫組織化学的染色及びヒドロキシプロリン(hydroxyproline)の定量を行い、透過電子顕微鏡で観察した。
コラーゲン沈着は、線維症において、最終的に細胞の死滅を誘導するので、かような特性が、脂肪幹細胞由来の三次元細胞集合体でも示されるか否かということを確認するために、LDHアッセイ及び生存/死滅アッセイ(live/dead assay)を行った。
Claims (12)
- 間葉細胞から分化させた細胞集合体を含むインビトロ線維症モデルであって、
前記細胞集合体は、前記間葉細胞を、培養容器表面に固定された前記間葉細胞に接着活性を有する成長因子との相互作用によって疎水性を帯びる培養容器に接着させることにより、分化させたものであり、
前記間葉細胞は、前記間葉細胞が前記細胞集合体に分化した後に、追加して3日ないし10日培養されており、さらに前記細胞集合体は、線維症の病理学的特徴を示す、インビトロ線維症モデル。 - 前記間葉細胞は、脂肪幹細胞、間葉系幹細胞、骨髄幹細胞及び線維芽細胞からなる群から選択されたいずれか一つであることを特徴とする請求項1に記載のモデル。
- 前記細胞集合体は、球形であり、直径が300ないし2,000μmであることを特徴とする請求項1に記載のモデル。
- 前記線維症の病理学的特徴は、前記細胞集合体、または前記細胞集合体内の細胞において、
過度な結合組織の形成と、
コラーゲン沈着と、
TGF(transforming growth factor)−ベータ、Smad、ラミニン及びSMA(smooth muscle actin)からなる群から選択されたいずれか1以上の線維症関連分子の発現、分泌、または合成の増加と、
細胞の死滅増大と、からなる群から選択されたいずれか一つ、またはそれらの組み合わせであることを特徴とする請求項1に記載のモデル。 - 前記線維症は、特発性肺線維症(IPF)、肺線維症、間質性肺疾患、非特異的間質性肺炎(NSIP)、通常性間質性肺炎(UIP)、心内膜心筋線維症、縦隔線維症、骨髄線維症、後腹膜線維症、腎原性全身線維症、クーロン病、陳旧性心筋梗塞症、皮膚硬化症、神経線維腫症、ヘルマンスキー・パドラック症侯群、糖尿腎臓病症、腎臓線維症、肥大心筋病症(HCM)、高血圧関連腎臓病症、腎臓細尿管間質性線維症、糸球体硬化症(FSGS)、放射線誘導線維症、子宮筋腫、アルコール性肝疾患、肝脂肪症、肝線維症、肝硬変症、C型肝炎ウイルス(HCV)感染、慢性器官移植拒否、皮膚の纎維性疾患、ケロイド瘢痕、デュプイトラン拘縮、エーラス・ダンロス症侯群、異栄養性表皮水疱症、口腔粘膜下線維症及び纎維増殖障害からなる群から選択されたいずれか一つであることを特徴とする請求項1に記載のモデル。
- 間葉細胞を、培養容器表面に固定された間葉細胞に接着活性を有する成長因子との相互作用によって疎水性を帯びる培養容器に接着させて培養し、細胞集合体を形成する段階と、
前記形成された細胞集合体を、3日ないし10日追加して培養し、前記細胞集合体において、線維症の病理学的特徴を形成する段階と、を含むインビトロ線維症モデルを製造する方法。 - 前記細胞集合体を形成する段階は、前記接着された間葉細胞の密度が上昇するにつれ、間葉細胞が培養容器から脱着されて細胞集合体を形成することを特徴とする請求項6に記載の方法。
- 前記培養容器の表面は、シラン化された表面、炭化水素コーティングされた表面、高分子表面、及び金属表面で構成された郡から選択される疎水性表面であることを特徴とする請求項6に記載の方法。
- 前記成長因子は、ポリペプチドリンカを利用して、ポリペプチドリンカのカルボキシル末端に、成長因子のアミノ末端が融合されているポリペプチドリンカ・成長因子組み換えタンパク質形態で、培養容器表面に固定されることを特徴とする請求項6に記載の方法。
- 前記ポリペプチドリンカは、マルトース結合タンパク質(MBP)、ヒドロフォビン及び疎水性細胞透過性ペプチド(CPPs)で構成された群から選択されることを特徴とする請求項9に記載の方法。
- 請求項1のインビトロ線維症モデルに被検物質を処理する段階と、
前記インビトロ線維症モデルの細胞集合体、または前記細胞集合体内の細胞において、無処理対照群と比較し、線維症の病理学的特徴の改善または治療を示す被検物質を、線維症治療のための候補物質として選別する段階と、を含む線維症治療剤をスクリーニングする方法。 - 前記線維症の病理学的特徴は、前記細胞集合体、または前記細胞集合体内の細胞において、
過度な結合組織の形成と、
コラーゲン沈着と、
TGF(transforming growth factor)−ベータ、Smad、ラミニン及びSMA(smooth muscle actin)からなる群から選択されたいずれか1以上の線維症関連分子の発現、分泌、または合成の増加と、
細胞の死滅増大と、からなる群から選択されたいずれか一つ、またはそれらの組み合わせであることを特徴とする請求項11に記載の方法。
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| PL2254586T3 (pl) * | 2008-02-22 | 2015-09-30 | Agency For Science Tech And Research Astarstar | Cząstki mezenchymalnych komórek macierzystych |
| KR101109125B1 (ko) * | 2009-03-24 | 2012-02-15 | 한국과학기술연구원 | 줄기세포를 혈관세포로 분화시키는 방법 및 이를 이용한 생체 내 혈관신생 유도 |
| US20150284689A1 (en) * | 2012-10-26 | 2015-10-08 | The Regents Of The University Of California | Strategy for engineering various 3d tissues, organoids and vasculature |
| WO2015019124A1 (en) * | 2013-08-05 | 2015-02-12 | Societe De Developpement Et De Recherche Industrielle | Molecular targets for the prevention and/or treatment of fibrosis, hypertrophic scars or keloids |
-
2015
- 2015-06-23 KR KR1020150089090A patent/KR101751513B1/ko active Active
-
2016
- 2016-05-25 EP EP16814592.8A patent/EP3315602A4/en active Pending
- 2016-05-25 WO PCT/KR2016/005501 patent/WO2016208879A1/ko not_active Ceased
- 2016-05-25 US US15/551,595 patent/US20180112183A1/en not_active Abandoned
- 2016-05-25 CN CN201680003618.0A patent/CN107002034A/zh active Pending
- 2016-05-25 JP JP2017567167A patent/JP6902788B2/ja active Active
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2019
- 2019-11-08 US US16/678,014 patent/US11365396B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2018523995A (ja) | 2018-08-30 |
| KR101751513B1 (ko) | 2017-06-27 |
| WO2016208879A1 (ko) | 2016-12-29 |
| US11365396B2 (en) | 2022-06-21 |
| EP3315602A4 (en) | 2018-11-21 |
| US20200071674A1 (en) | 2020-03-05 |
| CN107002034A (zh) | 2017-08-01 |
| EP3315602A1 (en) | 2018-05-02 |
| US20180112183A1 (en) | 2018-04-26 |
| KR20170000189A (ko) | 2017-01-02 |
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