JP6096082B2 - 血管周囲の間葉系前駆細胞に誘導される血管形成 - Google Patents
血管周囲の間葉系前駆細胞に誘導される血管形成 Download PDFInfo
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Description
間葉系前駆細胞の単離および富化における多数の試みは、これらの細胞が医学的用途を有する可能性があるためになされてきている。Pittinger他(1999)は、骨髄からのクローン原性細胞の増殖を示し、増大させた間葉系幹細胞の調製物を記載している。骨髄からの比較的高い収率を与えるこのような方法の、さらに最近の例は、Simmons他への公開W001/04268中に開示されている。これらの報告されている間葉系細胞はいずれも、血管形成をもたらすことができる血管系統の細胞を再生することができる細胞として示されることはなかった。
しかしながら今日まで、in vivoで血管組織を形成することができる単離された間葉系前駆細胞の例は存在していない。
修復の必要のあるヒト対象中の損傷組織を修復する方法であって、
(a)MPCの富化した集団を得ること、および
(b)有効量のMPCの富化した集団と前記対象の損傷組織を接触させることを含む方法に属すると言うことができる。
修復の必要のあるヒト対象中の損傷組織を修復する方法であって、
(a)培養物中で請求項41に記載の増大したMPCを増殖させること、および
(b)有効量の増殖した細胞と前記対象の損傷組織を接触させることを含む方法に属すると言うことができる。
第五の態様の第一形では、本発明は、心臓血管形成を誘導する際に使用するための組成物であって、間葉系前駆細胞(MPC)の集団を薬剤として許容可能な担体中に含み、前記MPCが血管周囲マーカーを有し血管前駆細胞である組成物
に属すると言うことができる。
(実施例1)
前駆細胞の単離および増殖
皮膚、毛包、骨髄、腸、脳、膵臓、およびさらに近年では歯髄を含めた幾つかの異なる成体組織において同定した幹細胞の適所は、非常に血管新生した部位であることが多い(1)。正常では静止状態の幹細胞集団の維持および制御は、宿主組織の要件に従い局所の微環境によってしっかりと調節されている(2,3)。骨髄および歯髄の支持結合組織はいずれも、骨および象牙質の周囲の鉱化構造を含めた、それらの各々の微環境を非常に忠実に再生することができる、高い増殖能力を有する間質幹細胞の集団を含む(4,5)。出生後の生物では、骨髄間質は、造血を促進し制御する、ゆるく織り込まれた、非常に血管新生した組織として存在する(6-8)。多くの組織がそれらの再生能力を失うか、あるいはそれらの再生能力が低下したとき、成体の骨髄は造血間葉系組織を連続的に再生する能力を保持しており、隣接する骨表面の再構築を担う(9,10)。対照的に、歯の内側の髄室は、鉱化した象牙質に埋没した微小血管網によって浸潤された、非造血の、緻密な繊維状組織からなる(11-13)。歯の成熟後、歯髄は比較的静止した状態になり、カリエスまたは機械的損傷などの障害によって生じた傷ついた象牙質物質に応答する、修復能力においてのみ作用する。
組織サンプル
正常なヒト成人ボランティア由来の腸骨稜由来の骨髄単核細胞(BMMNC)を、the Royal Adealaide Hospital Human Ethics Committeeによって設定されたガイドラインの下で得た。正常なヒトの埋伏した第三大臼歯は、それぞれthe University of Adelaide Dental Clinic Research、the University of Adelaide Human Ethics Committeeによって設定された承認ガイドラインの下で、若い成人から回収した。廃棄済みの完全な厚さの皮膚および末梢脂肪組織を、the Royal Adelaide Hospital Human Ethics Committeeによって設定されたガイドラインの下で、the Skin Cell Engineering Laboratoryからの通常の成形外科手術手順から得た。前に記載したのと同様に、歯髄組織は歯冠および歯根から分離した(4)。歯髄、皮膚および脂肪組織の単細胞懸濁液を、3mg/mlのI型コラゲナーゼ(Worthington Biochem、Freehold、NJ)および4mg/mlのディスパーゼ(Boeliringer Mannheim、GMBH、ドイツ)の溶液中において、1〜3時間37℃での酵素による消化によって調製した。単細胞懸濁液は、70μmストレーナー(Falcon、BD Labware、Franklin Lakes、NJ)に細胞を通過させることによって得た。骨髄、歯髄、皮膚および脂肪の細胞(0.01〜1×105/ウエル)調製物は、次いで以下に記載したような免疫選択、RNA抽出、または6ウエルプレート中での直接的な培養(Costar、Cambridge、MA)に使用した。
単細胞懸濁液を低い平板培養濃度(6ウエルプレート中の3連当たり1,000細胞と10,000細胞の間)で平板培養して、異なる免疫選択細胞分画のコロニー形成効率を評価した。5%のCO2中において37℃で、20のウシ胎児血清、2mML-グルタミン、100μMのL-アスコルビン酸-2-リン酸、100U/mlのペニシリンおよび1μg/mlのストレプトマイシンを補ったα-改変イーグル培地中で、これらの細胞を培養した。第14日の培養物を4%ホルマリンで固定し、次いで0.1%のトルイジンブルーで染色した。50以上の細胞の凝集体を、コロニー形成単位-繊維芽細胞(CFU-F)と同等なクローン原性コロニーとして記録した。
この手順は、他の箇所(25)に記載した手順の変形である。簡潔には、約1×108個のBMMNCを、氷上で1時間、STRO-1陽性細胞の上清(ネズミ抗ヒトBMSSC、IgM)(29)(1/2)と共にインキュベートした。次いで細胞をPBS/5%FBSで洗浄し、氷上で45分間、ビオチン化ヤギ抗マウスIgM(μ-鎖特異的; Caltag Laboratories、Burlingame、CA)の1/50希釈液に再懸濁させた。洗浄後、氷上で15分間ストレプトアビジンマイクロビーズ(Miltenyi Biotec、Bergisch Gladbach、F.R.G.)と共に細胞をインキュベートし、次いで製造者の推奨に従いMini MACS磁気カラム(Miltenyi Biotec)で分離した。
STRO-1陽性MACS単離細胞を、氷上で20分間ストレプトアビジン-FITC結合体(1/50; CALTAG Laboratories)と共にインキュベートし、次いでPBS/5%FBSで洗浄した。単色蛍光活性化細胞選別(FACS)は、FACStarPLUSフローサイトメーター(Becton Dickinson、Sunnyvale、CA)を使用して行った。二色FACS分析は、MACS単離STRO-1陽性BMMNCを飽和(1:1)レベルのCC9抗体上清(マウス抗ヒトCD146/MUC-18/Mel-CAM、IgG2a、Dr.Stan Gronthos)と共に、氷上で1時間インキュベートすることによって行った。PBS/5%FBSで洗浄した後、第二の標識ヤギ抗マウスIgG2a(γ-鎖特異的)フィコエリスリン(PE)結合抗体(1/50、CALTAG Laboratories)と共に、氷上で20分間細胞をインキュベートした。FACStarPLUSフローサイトメーターの自動細胞沈着装置(ACDU)を使用して、次いで細胞を選別した。限界希釈アッセイ:ウエル当たり1、2、3、4、5、および10個の細胞を接種、24連、前に記載したのと同様に10日間血清不含培地中で培養(26)。同様に、新たに調製した非分画BMMNCを、氷上で1時間CC9(IgG2a)および3G5(IgM)抗体、またはイソ型適合陰性対照抗体と共にインキュベートした。PBS/5%FBSで洗浄した後、第二の標識ヤギ抗マウスIgG2a(γ-鎖特異的)フィコエリスリン(PE)およびIgM(1/50、CALTAG Laboratories)結合抗体と共に、氷上で30分間細胞をインキュベートした。FACStarPLUSフローサイトメーターを使用して分析する前に、細胞をPBS/5%FBSで洗浄した。それぞれの抗体に関する陽性反応性は、イソ型適合対照抗体の99%より大きい蛍光のレベルとして定義した。
ex vivo増殖させた骨髄MPCの単細胞懸濁液を、トリプシン/EDTA処理によって調製し、次いで非希釈STRO-1上清、または異なる細胞系関連マーカーを同定する抗体(10μg/ml)と共に、氷上で1時間インキュベートした。次いで細胞をPBS/5%FBSで洗浄し、ヤギ抗ネズミIgM-フィコエリスリン(1/50、SouthernBiotechnologies)、ヤギネズミまたは抗ウサギIgG-フィコエリスリン(Caltag Laboratories)のいずれかと共にインキュベートした。細胞内抗原を同定するこれらの抗原用に、細胞内マーカーを染色する前に、細胞調製物を細胞膜に浸透させた。イソ型適合対照抗体を同一の条件下で処理した。フローサイトメトリーによる分析は、COULTER EPICS装置を使用して行った。ドットプロットは、イソ型適合陰性対照抗体を参照しながら、それぞれの系の細胞マーカーに関する蛍光強度のレベルを示すリストモード事象を表す。
ヒト組織切片(μm)をキシレン中で脱ろう化し、段階的エタノールを介してPBSに戻した。凍結組織切片(μm)およびサイトスピン調製物は-20℃において15分間冷たいアセトンで固定し、次いでPBS中で洗浄した。その後これらのサンプルを、30分間1.5%の過酸化水素を含むPBSで処理し、洗浄し、次いで室温で1時間5%の非免疫ヤギ血清を用いて阻害した。室温で1時間一次抗体と共に、サンプルをインキュベートした。使用した抗体:マウス(IgG1およびIgG2a)対照(Caltag、Burlingame、CA);ウサギ(Ig)対照、1A4(抗α-平滑筋アクチン、IgG1)、2F11(抗神経フィラメント、IgG1)、F8/86(ネズミ抗フォンウィルブランド因子、IgG1)(Dako、Carpinteria、CA);STRO-1;CC9(抗CD146);LF-151(ウサギ抗ヒト象牙質シアロ糖タンパク質;Dr.L.Fisher、NIDCR/NIH、MD)。作業用希釈物:ウサギ血清(1/500)、モノクローナル抗体上清(1/2)および精製抗体(10μg/ml)。適切な二次抗体、ビオチン化ヤギ抗マウスIgM、IgG1、IgG2aまたはビオチン化ヤギ抗ウサギ抗体と共に、室温で1時間サンプルをインキュベートすることによって、一回の染色を行った(Caltag Laboratories)。アビジン-ペルオキシダーゼ-複合体および基質を、次いで製造者の教示書に従い加えた(Vectastain ABCキット標準、Vector Laboratories)。サンプルはヘマトキシリンで対比染色し、水溶性培地中に包埋させた。室温で45分間、二次抗体、ヤギ抗マウスIgM-テキサスレッドおよびIgG-FITC(CALTAG Laboratories)を加えることによって、二重蛍光標識を行った。洗浄後、サンプルはVECTASHIELD蛍光包埋剤に包埋させた。
歯髄組織の単細胞懸濁液を、STRO-1(1/2)、CD146(1/2)、または3G5(1/2)に反応性がある抗体と共に、氷上で1時間インキュベートした。細胞はPBS/1%BSAで二回洗浄し、次いでヒツジ抗マウスIgG結合またはラット抗マウスIgM結合磁気Dynabeads(細胞当たり4ビーズ:Dynal、オスロ、ノルウェー)のいずれかと共に、40分間回転式ミキサー上で4℃においてインキュベートした。ビーズと結合した細胞は、製造者の推奨するプロトコルに従いMPC-1磁気粒子濃縮装置(Dynal)を使用して除去した。
ex vivoで増殖させた骨髄のSTRO-1brightMPCの単細胞懸濁液を、トリプシン/EDTA処理によって調製し、次いで200μlのマトリゲルを含む48ウエルプレートに平板培養した。STRO-1brightMPCは、10ng/mlで成長因子PDGF、EGF、VEGFを補った無血清培地(Gronthos他2003)中に、ウエル当たり20,000細胞で平板培養した。5%CO2中での37℃における24時間の培養の後、ウエルを洗浄し、次いで4%パラホルムアルデヒドで固定した。免疫組織化学試験を、前に記載したのと同様にヤギ抗ネズミIgGホースラディッシュペルオキシダーゼ抗体/Vectastainingキットを用いて同定したα-平滑筋アクチンに関して後に行った。
ex vivoで増殖させた脂肪由来のMPCの単細胞懸濁液を、in vitroにおいて骨髄のMPCが鉱化した骨髄を形成するのを誘導することが以前に示された(Gronthos他2003)、10%のFCS、100μMのL-アスコルビン酸-2-リン酸、デキサメタソン10-7Mおよび3mMの無機リン酸を補ったαMEM中で培養した。鉱質の堆積は、陽性フォンコッサ染色によって確認した。以前に記載されたのと同様に(Gronthos他2003)、0.5mMのメチルイソブチルメチルキサンチン、0.5μMのヒドロコルチゾン、および60μMのインドメタシンの存在下で、脂肪形成を誘導した。オイルレッドC染色を使用して、脂質含有脂肪細胞を同定した。記載したのと同様に(Pittenger他、1999)、10ng/mlのTGF-β3で処理した凝集した培養物における、軟骨形成分化を評価した。
前に記載したのと同様に(4)、約5.0×106個のSTRO-1bri/CD146+BMSSCまたはCD146+DPSC由来のex vivoで増殖させた細胞を、40mgのヒドロキシアパタイト/リン酸三カルシウム(HA/TCP)、セラミック粉末(Zimmer Inc、Warsaw、IN)と混合させ、次いで10週齢の免疫無防備状態のベージュマウス(NIH-bg-nu-xid、Harlan Sprague Dawley、Indianapolis、IN)の背表面の皮下に移植した。これらの手順は、承認されている動物プロトコル(NIDCR番号00-113)の仕様書に従い行った。
RNASTAT-60(TEL-TEST Inc.Friendswood TX)を使用して、STRO-1BRT/CD146+選別BMMNC、および対照細胞(3週間10-7Mのデキサメタソンの存在下で増殖させた一次BMSSC培養物)から、全RNAを調製した。第一鎖cDNA合成は、オリゴ-dTプライマーを使用して第一鎖cDNA合成キット(GIBCO BRL、Life Technologies)を用いて行った。第一鎖cDNA(2μl)を、46μlの1XPCRマスター反応混合物(Roche Diagnostics、Gmbh Mannheim、ドイツ)、および10pMolのそれぞれのヒト特異的プライマー対:CBFA1(632bp、および3つの小さな可変スプライシング変異体)(27)、センス5'-CTATGGAGAGGACGCCACGCCTGG-3'[配列番号1]、アンチセンス5'-CATAGCCATCGTAGCCTTGTCCT-3'[配列番号2];オステオカルシン(310bp)(4)、センス5'-CATGAGAGCCCTCACA-3'[配列番号3]、アンチセンス5'-AGAGCGACACCCTAGAC-3'[配列番号4];GAPDH(800bp)(4)センス、5'-AGCCGCATCTTCTTTTGCGTC-3'[配列番号5];アンチセンス5'-TCATATTTGGCAGGTTTTTCT-3'[配列番号6]に加えた。この反応混合物を、PCR Express Hybaid熱循環装置(Hybaid、Franklin、MA)中において、95℃で2分間1サイクル、次いで94℃/(30秒)、60℃/(30秒)、72℃/(45秒)で35サイクル、最後に7分間延長して72℃でインキュベートした。増幅後、それぞれの反応混合物を1.5%アガロースゲル電気泳動によって分析し、臭化エチジウム染色によって目に見える状態にした。
BMSSCおよびDPSCは、血管関連抗原STRO-1およびCD146をin vivoで発現する。
我々は以前に、ヒト骨髄の吸引物質由来の全ての検出可能なクローン原性コロニーを、それらのSTRO-1抗原(25,26)の充分な発現に基づいて単離し富化させるための、磁気活性化細胞選別(MACS)の有効性を実証している。BMSSCをさらに特徴付けるために我々は、STRO-1bri/MACS単離細胞を、MUC-18としても知られる細胞表面抗原CD146を認識する他のモノクローナル抗体、CC9(28)、内皮および平滑筋細胞上に存在するMel-CAMおよびSendo-1と共にインキュベートした。これらの試験によって、CC9が全STRO-1+集団由来のSTRO-1陽性発現分画(STRO-1BRT)と選択的に結合したことを、二色FACS分析によって決定した(図1A)。ポアソンの分布統計を使用したクローニング効率アッセイによって、BMSSCの発生の著しい増大を得て(平板培養した5個のSTRO-1BRT/CD146+細胞当たり1個のコロニー)、非分画骨髄細胞と比較すると、クローン原性コロニー集団の2×103倍の富化を得た(図1B)。STRO-1BRT/CD146-細胞分画中では、コロニー形成を検出することはできなかった(データ示さず)。
本発明の試験では、フローサイトメトリーによる分析によって、細胞表面抗原である3G5が、大部分(54%)の造血骨髄細胞によって充分に発現されたことを明らかにした(図4A)。この観察結果によって、ヒト骨髄の吸引物質から精製したBMSSCの集団を直接単離するための、候補マーカーとしての3G5は除外された。さらに、3G5およびSTRO-1の発現に基づく二重FACS分析は、2つの抗体が同じイソ型を共有していたので可能ではなかった。それにもかかわらず、異なる3G5/CD146FACS選別亜分画に関するin vitroでのコロニー効率アッセイによって、少ない比率(14%)の骨髄クローン原性コロニーのみが、3G5抗原を低いレベルで発現したことを実証した(図4B)。逆に、大部分(63%)のクローン原性DPSC(平板培養した105個の細胞当たり192個のコロニー形成細胞±18.4SE、n=3)は、免疫磁気ビーズ法による選択の後に、3G5+細胞分画中に存在した(図2)。3G5は、ヒト歯髄組織の凍結切片中の周皮細胞に対して、特異的な反応性を示した(図3F)。
本発明の試験は、それらの個体発生および分化能が明らかな2つの間葉系幹細胞の集団は、いずれもそのそれぞれの組織の微小血管と関係がある直接の証拠を与える。
成人ヒト骨髄のMPCは、それらのSTRO-1抗原の高発現およびCD34発現の欠如によって、間質前駆細胞、造血幹細胞および血管芽細胞と異なる。
出生後骨髄は、常在性幹細胞、および血液細胞形成(造血幹細胞)、内皮分化(血管芽細胞)、および結合組織/間質分化(間質前駆細胞/骨髄間質幹細胞/間葉系幹細胞)を担う前駆細胞系の中枢であるようである。我々のグループの近年の研究(Gronthos他、2003 ; ShiおよびGronthos 2003)は、それらのSTRO-1抗原の高発現に基づき、免疫グロブリンスーパーファミリーのメンバー、VCAM-1(CD106)およびMUC-18(CD146)のそれらの同時発現によって、ヒトの多型潜在性の骨髄間葉系前駆細胞(MPC)を初めて精製し特徴付けしている。SimmonsおよびTorok-Storb(1991aおよびb)による初期の研究は、in vitroで接着性コロニーを形成する能力を有する、骨髄由来のSTRO-1+間質前駆細胞も、低レベルではあるが造血幹細胞マーカー、CD34を発現したことを示している。これらの研究は、CD34抗体-補体仲介型の細胞溶解を使用して、骨髄の吸引物質中の高い比率の接着性コロニー形成細胞を排除した(SimmonsおよびTorok-Storb 1991b)。STRO-1抗体はヒトCD34+骨髄細胞を用いたマウスの免疫処置後に生成したが、CD34+/グリコホリン-A+非結合赤血球細胞およびCD34+/CD20+B-リンパ球において、適度なレベルから低いレベルでSTRO-1抗原も発現されるという事実によって、この抗体が生じた可能性があることを記すことは重要である。ここで我々は、精巧な蛍光活性化細胞選別技術を使用して、多型潜在性の成人ヒト骨髄のMPCは高レベルのSTRO-1を発現するが、間質前駆細胞、造血幹細胞および血管芽細胞マーカー(CD34)、リンパ球抗原(CD45)、ならびに非結合赤血球細胞マーカー(グリコホリン-A)に対する発現がない直接の証拠を与える(図6A〜C)。これらのデータは、成人ヒト骨髄由来のMPCは、さらに成熟した間質前駆細胞、造血幹細胞および血管芽細胞とは異なる、新規の幹細胞集団であることを実証する(図7)。
異なるヒト組織中の多型潜在性MPCの同定
異なる組織中のMPCの存在および正確な位置は大部分が知られていないが、MPCがヒト骨髄および歯髄組織中の血管周囲の適所に常在するらしいことを、我々は近年実証している(ShiおよびGronthos 2003)。これらの観察結果は、間葉系幹細胞マーカー、STRO-1、平滑筋および周辺細胞マーカー、CD146、α-平滑筋アクチンおよび周辺細胞特異的マーカー、3G5のそれらの発現に基づき異なるMPC集団を同定し単離するための、免疫組織化学法と免疫選択法の組合せに基づいていた。我々は現在これらの試験を拡大して、心臓、肝臓、腎臓、皮膚、脾臓、膵臓、リンパ節を含めた広くさまざまな組織中の、STRO-1/CD146、STRO-1/α-平滑筋アクチン、および3G5/CD146抗原の同時局在を実証している(図8)。
Strobright細胞は新血管新生(血管形成および動脈形成)を誘導し、虚血心筋組織の機能改善をもたらす。
図15。ラット腫瘍に注射したヒトStrobright細胞の拡大および生存。無胸腺ヌードラットに5分間250Gyを照射して、残存するナチュラルキラー機能を除去し、次いで1×106個のラットグリア芽腫細胞を皮下側面に注射した。移植後2週間で、グリア芽腫細胞腫瘍を500,000個のStrobright細胞、500,000個のStrodim細胞または生理食塩水と共に直接注射し、動物は7日後に殺傷した。Strobright細胞を与えた2/3の腫瘍組織では、ラット、ミトコンドリアではなくヒトに対する特異的反応性を有するモノクローナル抗体を使用するイムノペルオキシダーゼ法による染色によって、注射部位付近の多数のヒト細胞を実証し、中期の拡大および生存を示した。ヒト細胞はStrodim細胞を与えた3つの組織のいずれにおいても検出されず、Strobright細胞はこのin vivoモデル系において生存または複製の利点を有する可能性があることが示唆された(図A参照)。Strobright細胞は、小さな毛細血管および細動脈近くの群中に主に存在した(小矢印)(図B)。さらに、幾つかのヒト細胞が、血管構造中に取り込まれるのが見られた(大矢印)(図C)。これらのデータは、ヒトStrobright細胞は内因性(ラット)血管の新血管新生を誘導する可能性があり、ヒト起源の新しい血管中に取り込まれる可能性があることを示す。
ex vivoで増殖させたヒト骨髄間葉系前駆細胞の免疫表現型分析
我々は以前に、多型潜在性の間葉系前駆細胞(MPC)を、表現型STRO-1bright/VCAM-1(CD106)+またはSTRO-1bright/MUC-18(CD146)+に基づいて成人のヒト骨髄単核細胞から精製することができることを報告した(Gronthos他、2003; ShiおよびGronthos 2003)。MPC集団は、明確な培養条件下においてin vitroで容易に増殖させることができる(Gronthos他、2003)。ここで我々は、それぞれ逆転写ポリメラーゼ連鎖反応(RT-PCR)およびフローサイトメトリーによる分析を使用して、mRNAレベルとタンパク質レベルの両方で異なる細胞系と関係があるマーカーに基づき、ex vivoで増殖させたMPC子孫を特徴付けるデータを示す。
Claims (20)
- 虚血組織中の血管の形成または修復を誘導するための薬剤であって、マーカーSTRO-1を発現する間葉系前駆細胞(MPC)について富化した細胞集団を含み、前記富化した集団が、クローン原性コロニーを形成することができるMPCを少なくとも0.1%含む、薬剤。
- 血管の修復が動脈形成をもたらす、請求項1に記載の薬剤。
- 血管の修復が、α-平滑筋アクチンを発現する細胞による血管のコーティングをもたらす、請求項1に記載の薬剤。
- 前記富化した集団が、クローン原性コロニーを形成することができる少なくとも1%のMPCを含む、請求項1に記載の薬剤。
- 前記富化した集団が少なくとも0.1%のSTRO-1陽性MPCを含む、請求項1に記載の薬剤。
- 前記富化した集団が少なくとも1%のSTRO-1陽性MPCを含む、請求項1に記載の薬剤。
- 前記細胞の富化した集団がさらに、マーカー3G5、MUC18/CD146およびα-平滑筋アクチンの1つまたは複数に対して陽性である、請求項1から6のいずれか一項に記載の薬剤。
- 前記細胞の富化した集団がマーカーVCAM-1をさらに同時発現する、請求項1から7のいずれか一項に記載の薬剤。
- 前記細胞の富化した集団がTHY-1、VCAM-1、ICAM-1、PECAM-1、CD49a/CD49b/CD29、CD49c/CD29、CD49d/CD29、CD29、CD61、インテグリンβ5、6〜19、トロンボモジュリン、CD1O、CD13、SCF、PDGF-R、EGF-R、IGF-1R、NGF-R、FGF-Rおよびレプチン-R(STRO-2)からなる群から選択されるマーカーの1つまたは複数のいずれかを同時発現する、請求項1から8のいずれか一項に記載の薬剤。
- 前記細胞の富化した集団が以下の造血系統のマーカー:CD34、CD45、およびグリコホリン-Aに陰性である、請求項1から9のいずれか一項に記載の薬剤。
- 前記細胞の富化した集団が、非造血血管新生組織内の血管周囲の適所に由来する、請求項1から10のいずれか一項に記載の薬剤。
- 血管または血管周囲組織由来のα-平滑筋アクチンを発現する細胞の消失と関係がある疾患に患者が罹患している、請求項1から11のいずれか一項に記載の薬剤。
- 前記薬剤が、異常な増殖、漏出、または動脈瘤血管を含めた修復の必要がある異常な血管を含む標的組織に投与されるものである、請求項12に記載の薬剤。
- 標的組織が虚血を示す、請求項1から13のいずれか一項に記載の薬剤。
- 患者が脳血管虚血、腎臓虚血、肺虚血、四肢虚血、虚血性心筋症および心筋虚血からなる群から選択される状態の治療の必要がある、請求項14に記載の薬剤。
- 標的組織が心筋層である、請求項1から15のいずれか一項に記載の薬剤。
- 前記細胞の富化した集団が新しい血管構造を構築する、請求項1から16のいずれか一項に記載の薬剤。
- 前記細胞の富化した集団が新しい血管構造の形成を誘導する、請求項1から16のいずれか一項に記載の薬剤。
- 前記細胞が自己由来である、請求項1から18のいずれか一項に記載の薬剤。
- 前記細胞が同種異系源由来である、請求項1から18のいずれか一項に記載の薬剤。
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