JP2011021023A - Cns疾患の治療のためのtgf−rシグナリングのインヒビター - Google Patents
Cns疾患の治療のためのtgf−rシグナリングのインヒビター Download PDFInfo
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Abstract
【解決手段】損傷を受けた神経経路の好結果の再生および機能的な再連結を促進するためのオリゴヌクレオチドの使用であって、該オリゴヌクレオチドが、8から50個の核酸塩基を含む、配列番号1または配列番号2の部分配列に少なくとも80%同一の配列を有するオリゴヌクレオチド、ならびに該配列の塩、および光学異性体の少なくとも1つであり、該配列が、TGF−RIIをコードする遺伝子のオープンリーディングフレームの翻訳開始コドンを含む領域と十分にハイブリダイズし得る、使用。
【選択図】なし
Description
1.個々の成分は当然知られているけれども(TGF−β、TGF−RII、脳脊髄液コンパートメント、硝子体液、内リンパ液、ニューロン前駆細胞など)、生理学的な調節回路は、前駆細胞/幹細胞による効果的なCNS再生のレベルを明らかにすることが認識されている。この回路は、心室壁で発現される重要な標的分子TGF−RIIを有し、CNS病理学の大部分において消滅した神経再生に原因がある。
2.興味深いことに、調節は、血液、リンパ管、細胞外マトリックスを介してではなく液体コンパートメント(脳脊髄液など)を介して起こり、その液体コンパートメントは、神経細胞およびそれらの前駆細胞または幹細胞に直接接触する。
3.ニューロンの/乏突起神経膠のまたは星状細胞の再生のための生理学的阻害回路は、CNS内の損傷を修復する方策のための理想的な標的であるとして発見され、圧倒的に、神経系においてほとんどすべての破壊性の病状に適用され得る。TGF−βについてのこれまでの知識から、TGF−βの機能を減少させるよりもむしろ増加させようと試みされており(5を参照のこと)、そのためCNSにおいて公知の神経保護または免疫抑制の活性を増強する:ここで、本発明者らは、心室壁でTGF−RIIシグナリングをブロックすることによって、幹細胞再生に対するその阻害機能を減少させると仮定する。
4.炎症過程が神経変性に重要な役割を果たし、および比較的大量の臨床前および臨床データがこの考えを支持すると思われると長期間にわたり推測されていたが、主回路は、現在、開示されており、それは、すべての単一の調節副回路、例えば、サイトカイン(IL−1、IL−6、IL−12)などを組み合わせる。
5.さらに、自然(Nature)に神経保護が設置され、そして神経再生に優先してCNSに免疫特権が与えられることに留意し得る。今のところ、免疫特権が与えられおよび高度に保護されたCNS(免疫攻撃および神経アポトーシスに対して特異的に保護される)は、TGF−βシステムのために重要な部分であり、これが、正確な免疫特権および同一のTGF−β分子のため神経再生に欠損を有することは示されていない。進化の概念は、非常に精巧なCNSの急激な神経保護およびその最も複雑な機能性を支持して主張するように思われる。この意味で、個々の神経再生は、個人の神経保護よりも進化には重要ではないと思われる。
生理学的な脳の神経発生により、機能不全のまたは老化している神経細胞、乏突起神経膠細胞または星状細胞が、それぞれの前駆細胞によって継続的に修復/置換される。脳での修復のための神経発生は、TGF−β−TGF−R系(特にTGF−RIIだけでなく、TGF−RIもまた)によって、脳脊髄液を介して調節される。主な組み合わせは、TGF−βを産生しそしてCSF(および硝子体、内リンパ)コンパートメント内へ細胞外腔を介してこれを分泌するミクログリア/マクロファージ系統細胞、および表面構造上に高度に発現されたTGF−RIIまたはTGF−RI、または同一のレセプターを有する上衣裏層を通じて、CSFを介して(および硝子体、内リンパへ)、このシグナルを受ける神経前駆細胞/幹細胞である。多くのCNS病理では、神経発生は、重度に障害されまたは機能不全になる。神経発生の調節は、通常、任意の特定の疾患の病理の状況において起こるCNSのミクログリア細胞/マクロファージの活性化によって調節、通常は抑制される。このルート(CSFから副脳室領域/その他の神経性の領域へ)によって活性化されたミクログリア細胞/マクロファージは、神経変性性、急性および慢性、炎症性、低酸素性、アテローム性動脈硬化性または加齢性の脳の柔組織の再生を抑制する。ニューロンの分化が影響されるだけではなく、乏突起神経膠細胞および星状細胞系も影響される。ニューロンの/乏突起神経膠の/星状細胞の再生を改善するために、この回路を妨害するすべての分子は、治療として請求されている。この回路を使用するCNS病理の診断、予防処置、予防、または予後のための方法はまた、治療処置の効果をモニタリングするために、考えられるところでは非常に重要である。
(TGF−β1のアップレギュレーションおよびその効果)
多くの研究は、神経保護または免疫調節の目的のためにTGF−β1のレベルを増加させようと試みた。アゴニスト研究は、TGF−β1が中大脳動脈閉塞(MCAO)の後の神経細胞死および梗塞の大きさを減少させることを示すが、逆に、アンタゴニスト研究は、MCAO後に神経細胞死および梗塞の大きさを増加させることを示しており、これはTGF−β1が、大脳虚血において神経保護の役割を有することを示唆している。マウスにおけるインビボでのTGF−β1のアデノウイルスに媒介された過剰発現についての最近の研究は、さらに、大脳虚血においてTGF−β1が神経保護の役割に関連し、これは、神経細胞死、梗塞の大きさ、および神経学的結果の減少によって明らかである。さらに、多くのインビトロでの研究は、ラット、マウス、ニワトリ、およびヒトを含む様々な種由来のニューロンにおけるTGF−β1の神経保護の能力を示している。非常に興味深いことには、TGF−β1は、広範な死誘導薬剤/損傷(低酸素性/虚血、グルタミン酸興奮毒性、β−アミロイド、酸化的損傷、およびヒト免疫不全ウイルスを含む)に対して保護することが示された。TGF−β1の神経保護効果は、ミトコンドリア膜ポテンシャルを維持する能力、Ca2+ホメオスタシスを安定化する能力、抗アポトーシスタンパク質Bcl−2およびBcl−x1の発現を増加させる能力、カスパーゼ3活性化を阻害する能力、およびプラスミノゲンアクチベーターインヒビター−1を誘導する能力に関連している。
(b)リンカーのすべてのタイプを含むペプチド、ペプチド複合体、
(c)低分子、ラフト(raft)またはカベオリ(caveoli)改変剤、
(d)ゴルジ体の改変剤、
(e)抗体およびそれらの誘導体、特にキメラ、Fabフラグメント、Fcフラグメント、または
(f)キャリア、リポソーム、ナノ粒子、複合体、または上述の構成物を含む任意のその他の送達システム
が、上述の回路を標的とするために用いられ得、そのため神経再生が回復または改善される。
5’−XCAGCCCCCGACCCATGZ−3’
ACAGGACGATGTGCAGCGGCCACAGGCCCCTGAG、CAGGACGATGTGCAGCGGCCACAGGCCCCTGAG、AGGACGATGTGCAGCGGCCACAGGCCCCTGAG、GGACGATGTGCAGCGGCCACAGGCCCCTGAG、GACGATGTGCAGCGGCCACAGGCCCCTGAG、ACGATGTGCAGCGGCCACAGGCCCCTGAG、CGATGTGCAGCGGCCACAGGCCCCTGAG、GATGTGCAGCGGCCACAGGCCCCTGAG、ATGTGCAGCGGCCACAGGCCCCTGAG、TGTGCAGCGGCCACAGGCCCCTGAG、GTGCAGCGGCCACAGGCCCCTGAG、TGCAGCGGCCACAGGCCCCTGAG、GCAGCGGCCACAGGCCCCTGAG、CAGCGGCCACAGGCCCCTGAG、AGCGGCCACAGGCCCCTGAG、GCGGCCACAGGCCCCTGAG、CGGCCACAGGCCCCTGAG、GGCCACAGGCCCCTGAG、GCCACAGGCCCCTGAG、CCACAGGCCCCTGAG、CACAGGCCCCTGAG、ACAGGCCCCTGAG、CAGGCCCCTGAG、AGGCCCCTGAG、GGCCCCTGAG、GCCCCTGAG、CCCCTGAG、CCCTGAG、CCTGAG、CTGAG、TGAG、GAG、AG、G、
GCAGACCCCGCTGCTCGTCATAGACCGAGCCCCC、GCAGACCCCGCTGCTCGTCATAGACCGAGCCCC、GCAGACCCCGCTGCTCGTCATAGACCGAGCCC、GCAGACCCCGCTGCTCGTCATAGACCGAGCC、GCAGACCCCGCTGCTCGTCATAGACCGAGC、GCAGACCCCGCTGCTCGTCATAGACCGAG、GCAGACCCCGCTGCTCGTCATAGACCGA、GCAGACCCCGCTGCTCGTCATAGACCG、GCAGACCCCGCTGCTCGTCATAGACC、GCAGACCCCGCTGCTCGTCATAGAC、GCAGACCCCGCTGCTCGTCATAGA、GCAGACCCCGCTGCTCGTCATAG、GCAGACCCCGCTGCTCGTCATA、GCAGACCCCGCTGCTCGTCAT、GCAGACCCCGCTGCTCGTCA、GCAGACCCCGCTGCTCGTC、GCAGACCCCGCTGCTCGT、GCAGACCCCGCTGCTCG、GCAGACCCCGCTGCTC、GCAGACCCCGCTGCT、GCAGACCCCGCTGC、GCAGACCCCGCTG、GCAGACCCCGCT、GCAGACCCCGC、GCAGACCCCG、GCAGACCCC、GCAGACCC、GCAGACC、GCAGAC、GCAGA、GCAG、GCA、GC、G、
配列番号3:5’−CAGCCCCCGACCCATG−3’
配列番号4:5’−GCTGATGCCTGTCACTTGAA−3’
配列番号5:5’−GCCATGGAGTAGACATCGGT−3’
配列番号6:5’−GCAACAGCTATTGGGATGGT−3’
配列番号7:5’−GTGCAGGGGAAAGATGAAAA−3’
配列番号8:5’−GTATCAGCATGCCCTACGGT−3’
配列番号9:5’−GGATCCAGATTTTCCTGCAA−3’
配列番号10:5’−GGAGAAGCAGCATCTTCCAG−3’
配列番号11:5’−GAGCTCTTGAGGTCCCTGTG−3’
配列番号12:5’−GAGACCTTCCACCATCCAAA−3’
配列番号13:5’−TAGCTGGCTGTGAGACATGG−3’
配列番号14:5’−TTTTGAAACGCTGTGCTGAC−3’
配列番号15:5’−TCAGCCAGTATTGTTTCCCC−3’
配列番号16:5’−TCACACAGGCAGCAGGTTAG−3’
配列番号17:5’−TCAGGAATCTTCTCCTCCGA−3’
配列番号18:5’−TGGTAGTGTTTAGGGAGCCG−3’
配列番号19:5’−TATCCCCACAGCTTACAGGG−3’
配列番号20:5’−AGCCTCTTTCCTCATGCAAA−3’
配列番号21:5’−ATGTCATTTCCCAGAGCACC−3’
配列番号22:5’−AGGAATCTTCTCCTCCGAGC−3’
配列番号23:5’−AGCCATGGAGTAGACATCGG−3’
配列番号24:5’−ATGCTACTGCAGCCACACTG−3’
配列番号25:5’−CCTTCTCTGCTTGGTTCTGG−3’
配列番号26:5’−CCAGGAGAAATAAGGGCACA−3’
配列番号27:5’−CAGCAGCTCTGTGTTGTGGT−3’
配列番号28:5’−CCCACTGTTAGCCAGGTCAT−3’
配列番号29:5’−CAGCCCCCGACCCATGGCAGACCC−3’
配列番号30:5’−CAGCCCCCGACCCATGGCAGACC−3’
配列番号31:5’−CAGCCCCCGACCCATGGCAGAC−3’
配列番号32:5’−CAGCCCCCGACCCATGGCAGA−3’
配列番号33:5’−CAGCCCCCGACCCATGGCAG−3’
配列番号34:5’−CAGCCCCCGACCCATGGCA−3’
配列番号35:5’−CAGCCCCCGACCCATGGC−3’
配列番号36:5’−CAGCCCCCGACCCATGG−3’
配列番号37:5’−GCAGCCCCCGACCCATGGCAGACC−3’
配列番号38:5’−GCAGCCCCCGACCCATGGCAGAC−3’
配列番号39:5’−GCAGCCCCCGACCCATGGCAGA−3’
配列番号40:5’−GCAGCCCCCGACCCATGGCAG−3’
配列番号41:5’−GCAGCCCCCGACCCATGGCA−3’
配列番号42:5’−GCAGCCCCCGACCCATGGC−3’
配列番号43:5’−GCAGCCCCCGACCCATGG−3’
配列番号44:5’−GCAGCCCCCGACCCATG−3’
配列番号45:5’−AGCAGCCCCCGACCCATGGCAGAC−3’
配列番号46:5’−AGCAGCCCCCGACCCATGGCAGA−3’
配列番号47:5’−AGCAGCCCCCGACCCATGGCAG−3’
配列番号48:5’−AGCAGCCCCCGACCCATGGCA−3’
配列番号49:5’−AGCAGCCCCCGACCCATGGC−3’
配列番号50:5’−AGCAGCCCCCGACCCATGG−3’
配列番号51:5’−AGCAGCCCCCGACCCATG−3’
配列番号52:5’−GAGCAGCCCCCGACCCATGGCAGA−3’
配列番号53:5’−GAGCAGCCCCCGACCCATGGCAG−3’
配列番号54:5’−GAGCAGCCCCCGACCCATGGCA−3’
配列番号55:5’−GAGCAGCCCCCGACCCATGGC−3’
配列番号56:5’−GAGCAGCCCCCGACCCATGG−3’
配列番号57:5’−GAGCAGCCCCCGACCCATG−3’
配列番号58:5’−TGAGCAGCCCCCGACCCATGGCAG−3’
配列番号59:5’−TGAGCAGCCCCCGACCCATGGCA−3’
配列番号60:5’−TGAGCAGCCCCCGACCCATGGC−3’
配列番号61:5’−TGAGCAGCCCCCGACCCATGG−3’
配列番号62:5’−TGAGCAGCCCCCGACCCATG−3’
配列番号63:5’−CTGAGCAGCCCCCGACCCATGGCA−3’
配列番号64:5’−CTGAGCAGCCCCCGACCCATGGC−3’
配列番号65:5’−CTGAGCAGCCCCCGACCCATGG−3’
配列番号66:5’−CTGAGCAGCCCCCGACCCATG−3’
配列番号67:5’−CCTGAGCAGCCCCCGACCCATGGC−3’
配列番号68:5’−CCTGAGCAGCCCCCGACCCATGG−3’
配列番号69:5’−CCTGAGCAGCCCCCGACCCATG−3’
配列番号70:5’−CCCTGAGCAGCCCCCGACCCATGG−3’
配列番号71:5’−CCCTGAGCAGCCCCCGACCCATG−3’
配列番号72:5’−CCCCTGAGCAGCCCCCGACCCATG−3’
配列番号33:5’−CAGCCCCCGACCCATGGCAG−3’
配列番号34:5’−CAGCCCCCGACCCATGGCA−3’
配列番号35:5’−CAGCCCCCGACCCATGGC−3’
配列番号36:5’−CAGCCCCCGACCCATGG−3’
配列番号41:5’−GCAGCCCCCGACCCATGGCA−3’
配列番号42:5’−GCAGCCCCCGACCCATGGC−3’
配列番号43:5’−GCAGCCCCCGACCCATGG−3’
配列番号44:5’−GCAGCCCCCGACCCATG−3’
配列番号49:5’−AGCAGCCCCCGACCCATGGC−3’
配列番号50:5’−AGCAGCCCCCGACCCATGG−3’
配列番号51:5’−AGCAGCCCCCGACCCATG−3’
配列番号56:5’−GAGCAGCCCCCGACCCATGG−3’
配列番号57:5’−GAGCAGCCCCCGACCCATG−3’
配列番号62:5’−TGAGCAGCCCCCGACCCATG−3’
配列番号73:5’−ATGTGAAGATGGGCAAGACC−3’
配列番号74:5’−ATCTCCATGTGAAGATGGGC−3’
配列番号75:5’−AACGGCCTATCTCGAGGAAT−3’
配列番号76:5’−AACATCGTCGAGCAATTTCC−3’
配列番号77:5’−AATCCAACTCCTTTGCCCTT−3’
配列番号78:5’−AAACCTGAGCCAGAACCTGA−3’
配列番号79:5’−AGGGCGATCTAATGAAGGGT−3’
配列番号80:5’−AGTGCACAGAAAGGACCCAC−3’
配列番号81:5’−ACACTGGTCCAGCAATGACA−3’
配列番号82:5’−TTCCTGTTGACTGAGTTGCG−3’
配列番号83:5’−CACTCTGTGGTTTGGAGCAA−3’
配列番号84:5’−CAAGGCCAGGTGATGACTTT−3’
配列番号85:5’−CACACTGGTCCAGCAATGAC−3’
配列番号86:5’−CTGACACCAACCAGAGCTGA−3’
配列番号87:5’−CTCTGCCATCTGTTTGGGAT−3’
配列番号88:5’−TCAAAAAGGGATCCATGCTC−3’
配列番号89:5’−TGACACCAACCAGAGCTGAG−3’
配列番号90:5’−TGATGCCTTCCTGTTGACTG−3’
配列番号91:5’−TTCCTGTTGACTGAGTTGCG−3’
配列番号92:5’−TTCTCCAAATCGACCTTTGC−3’
配列番号93:5’−GGAGAGTTCAGGCAAAGCTG−3’
(a)TGF−β1およびニューロン前駆細胞を含む試験システムとともに、候補化合物をインキュベートする工程;および
(b)活性なTGFレセプターの発現または該ニューロン前駆細胞の増殖をアッセイする工程;を包含し、
(c)該試験化合物の不在下での試験システムと比較して、(i)活性なTGFレセプターの発現の抑制の廃絶、または(ii)ニューロン前駆細胞の増殖の抑制の廃絶が、所望の特性を有する候補化合物の存在が示される。
TGF−β1は、げっ歯動物の成体の神経幹細胞および前駆細胞の増殖を阻害する。
成体の雌性マウス(種々の系統)またはFischer-344ラット(3〜4カ月齢:Charles River、ドイツ)を屠殺し、そして脳および脊髄を取り出して、4.5gm/lのグルコース(Merck、ドイツ)を含む4℃のDPBS(PAN、ドイツ)(DPBS/glu)に入れる。上に重なっている髄膜および血管を取り出す。海馬および上衣領域(側脳室の外側壁由来の上衣下および副脳室領域を含む(SVZ))を無菌的に取り出す。切り出した組織を新鮮なDPBS/gluに移し、1回洗浄し、ペトリ皿に移し、そして機械的に解離する。細胞懸濁液をDPBS/gluで洗浄して過剰の血液をすすぎ、そして0.01%のパパイン(Worthington Biochemicals、英国)、0.1%のディスパーゼII(dispase II)(Boehringer Mannheim, Mannheim、ドイツ)、0.01%のDNアーゼI(Worthington Biochemicals)、およびHBSS(PAN)中に12.4mMのMgSO4を含むMg2/Ca2(PAA、ドイツ)を含まないPPD溶液に再懸濁し、そして室温で30〜40分間消化する。細胞懸濁液を10分ごとにすりつぶす。解離した細胞を回収し、そして2mMのL−グルタミンおよび0.1gm/lペニシリン/ストレプトマイシンを含む無血清DMEM/F12培地に再懸濁し、的確にすりつぶしながら3回洗浄する。最後に、単一細胞懸濁液を、B27(Gibco BRL)(NB/B27)、2mMのL−グルタミン(PAN)、0.1gm/lペニシリン/ストレプトマイシン(PAN)、2g/mlヘパリン(Sigma, Taufkirchen、ドイツ)、20ng/mlのbFGF−2(R&D Systems、ドイツ)、および20ng/mlのEGF(R&D Systems、ドイツ)が添加されたNB培地(Gibco BRL、ドイツ)に再懸濁する。生存細胞を、血球計数器で、トリパンブルー排除アッセイによって計数する。細胞をT−25培養フラスコに播種し、そして5%CO2のインキュベータ中で37℃に維持する。単一細胞が懸濁培養の5〜7日以内に球体を形成し始め、次の週の間、塊および数が増え続ける。培地の半分を7日ごとに交換する。3〜20継代数の細胞を実験に用いる(Wachs, F. P., S. Couillard-Despresら., Lab Invest 2003, 83(7), 949-962)。神経幹細胞および前駆細胞の培養は、さらにNSCという。解離工程において、浮遊神経球体を含んでいる培養培地を、15mlの遠心管に回収し120rcfで5分間遠心分離する。ペレットを200μlのAccutase(Innovative Cell Technologies Inc., PAAによって配布されている)に再懸濁し、そして約10回ピペットを用いてすりつぶす。次いで、細胞懸濁液を37℃で10分間インキュベートする。解離した球体を再度すりつぶし、800μlのNB/B27培地に再懸濁する。解離した細胞を120rcfで5分間遠心分離し、そしてNB/B27培地に再懸濁する。アリコートを、血球計数器で、トリパンブルー排除アッセイによって計数して、生存細胞の量を決定する。細胞(105個)を、NB/B27培地で長期継代のために、T75培養フラスコにプレーティングする(フラスコごとに10mlの培養培地)。初代神経球体のAccutase処理後に得られた細胞は増殖し、二次神経球体を得る。初代神経球体細胞の培養後7〜9日、二次神経球体を継代する。初代培養および初代神経球体と同様に、二次神経球体の解離後に得られた単一細胞は増殖し、三次神経球体を得る(Wachs, F. P., S. Couillard-Despresら、Lab Invest 2003, 83(7), 949-962)。
神経幹細胞および前駆細胞におけるTGF−β1の効果は可逆的である。
TGF−β1で誘導した増殖阻害が可逆的効果であるか否かを決定するために、NSCを実施例1に記載されているプロトコルに従って10ng/mlのTGF−β1で7日間刺激する。解離後、生存細胞を、血球計数器で、トリパンブルー排除アッセイによって計数し、そして増殖因子刺激された104個のNSCを再播種し、そして実施例1に記載されているプロトコルに従って10ng/mlのTGF−β1を用いてまたは用いず培養する。この解離/計数/再播種の手順を、7日ごとに行う。図2に示すように、培養3週後、最初にTGF−β1処理され現在TGF−β1なしで増殖している細胞の増殖割合は、以前の処理されていない細胞と比較した場合、通常まで戻る。これは、成熟した神経幹細胞および前駆細胞におけるTGF−β1の効果が可逆的であることを示す。TGF−β1を用いた長期間のインキュベーションは、さらに、細胞増殖を減少させない。
TGF−βRIIに対する抗体は、げっ歯動物の成体のNSCにおけるTGF−β1効果を減少させ得る。
低い継代数の刺激されていない7日齢の神経球体を、実施例1に記載されているようにAccutaseTMの使用によって解離する。得られた単一細胞懸濁液を、ブロッキング分析のために使用した。げっ歯動物の成体のNSCを、1mlの容量のNB/B27培地を含む12ウェルプレートに104個の細胞の密度で播種した。播種2時間後および10ng/mlのTGF−β1での刺激1時間前に、種々の濃度の中和抗TGF−βRII抗体(R&D Systems、ドイツ)を培養培地に添加した。播種3日および6日後に、細胞を1日目に行われた手順と同一の抗TGF−βRII抗体およびTGF−β1の添加によって再刺激する。7日目に、培養物をAccutaseTMの使用によって解離し、生存細胞を、血球計数器で、トリパンブルー排除アッセイによって計数する。興味深いことに、抗TGF−βRII抗体自体の添加によりNSCの増殖が減少する。TGF−βRIIに対する抗体は、使用した最も高い濃度(10μg/ml)での使用でさえも、TGF−β1で誘導される効果を部分的にのみ阻害し得る(図3)。
可溶性TGF−RIIは、NSC増殖のTGF−β1で誘導される抑制を完全に阻害する。
製造者のプロトコルに従って(R&D Systems、ドイツ)、ヒトTGF−RIIの159個のアミノ酸残基の細胞外ドメインをコードするDNA配列を(Linら, Cell 1992, 68(4), 775-785)、ヒトIgG1のFc領域に融合し、そしてキメラタンパク質を、マウス骨髄腫細胞株NSOで発現させた。低い継代数の刺激されていない7日齢の神経球体を、実施例1に記載されているようにAccutaseTMの使用によって解離する。得られた単一細胞懸濁液を、ブロッキング分析のために使用した。げっ歯動物の成体のNSCを、1mlの容量のNB/B27培地を含む12ウェルプレートに104個の細胞の密度で播種した。播種2時間後および10ng/mlのTGF−β1での刺激1時間前に、種々の濃度の生物学的活性を有する可溶性組換えヒトTGF−βsRII/Fcキメラ(R&D Systems、ドイツ)を培養培地に添加した。播種3日および6日後に、細胞を1日目に行われた手順と同一のTGF−βsRII/FcキメラおよびTGF−β1の添加によって再刺激する。7日目に、培養物をAccutaseTMの使用によって解離し、生存細胞を、血球計数器で、トリパンブルー排除アッセイによって計数する。興味深いことに、TGF−βsRII/Fcキメラの添加により、用量依存様式でTGF−β1で誘導される効果を完全にブロックし得る(データは示さず)。明らかに、可溶性組換えヒトTGF−βsRII/Fcキメラ(可溶性TGF−βRII)の前投与による細胞培養上清中の活性なTGF−β1の廃絶は、TGF−β1で誘導される成熟神経幹細胞および前駆細胞の増殖抑制を完全にブロックする(図4)。
TGF−βRIIを発現する細胞は、細胞選別技術を用いて単離され得る。
現在の方法は、神経幹細胞および前駆細胞の迅速かつ信頼できる分離および精製ができない。所定の表面マーカーの発現に基づいて純粋な神経幹細胞および前駆細胞集団の単離の可能性を研究するために、本発明者らは、種々の技術によってTGF−βRIIの発現による神経幹細胞および前駆細胞を単離する。TGF−βRIIを発現する神経幹細胞および前駆細胞を2つの技術で単離することが可能である:(i)FACS選別(データは示さず)、および(ii)MACS選別。解離した成熟神経幹細胞および前駆細胞を、10μg/mlのTGF−RIIに対する一次抗体(R&D Systems、ドイツ)を用いて、室温で20分間インキュベートする。PBSでの1回の洗浄工程後、細胞をウサギ抗ヤギPE(1:500)二次抗体(Dianova)を用いてインキュベートする。PBSでの1回の洗浄工程後、製造者のプロトコルに従って(Miltenyi Biotech、ドイツ)、細胞を常磁性ビーズに連結されたPEに対する三次抗体で染色する。細胞懸濁液を、製造者のプロトコルに従って(Miltenyi Biotech、ドイツ)MACSシステムを用いて磁気選別し、そして選別後の負および正の細胞を計数し、培養を行う(図5)。選別されたすべての細胞の約20%が、TGF−βRIIに対して陽性に染色した。
TGF−βRIIに対するアンチセンスオリゴヌクレオチドは、インビトロで、成熟神経幹細胞および前駆細胞の増殖のTGF−β1で誘導されたダウンレギュレートを阻害する。
細胞を、実施例1に記載されているように調製し、解離し、そしてプレーティングした。次いで、細胞を、10ng/mlのTGF−β1、10μMのTGF−βRIIアンチセンスオリゴヌクレオチド5’−cagcccccgacccatg−3’(配列番号3)、センスオリゴヌクレオチド5’−catgggtcgggggctg−3’、またはミスセンス5’−catccccggacccgtg−3’を用いてまたは用いずに1週間インキュベートした。オリゴヌクレオチドをホスホロチオエート改変し、そしてオリゴヌクレオチドを含む培地を毎日交換した。TGF−β1で誘導される神経幹細胞および前駆細胞の増殖の阻害が、アンチセンス(配列番号3)処理によって、完全にそして特異的にブロックされたことに留意すること(図6)。
TGF−RII特異的アンチセンスオリゴヌクレオチドでのインビボ処理は、成熟脳における細胞増殖のTGF−β1で誘導される遮断を救済する。
この実施例は、(i)インビボでの神経幹細胞および祖先細胞の増殖におけるTGF−β1注入の効果、および(ii)TGF−βRIIアンチセンスオリゴヌクレオチド処理によるこの効果の救済を示す。したがって、以下の実験を設計した。
TGF−RII特異的アンチセンスオリゴヌクレオチドでのインビボ処理は、成熟脳における細胞増殖のTGF−β1で誘導される遮断を抑える。
この実施例は、TGF−βRIIに対するアンチセンスオリゴヌクレオチド処理が、成熟脳における細胞増殖のTGF−β1で誘導されたダウンギュレーションを抑え得ることを示す。
少なくとも1つのアンチセンスオリゴヌクレオチドを含む薬学的処方物。
アンチセンスオリゴヌクレオチドについての3つの代表的な水性処方物:
1.aCSF中:148.0mMのNaCl、3.0mMのKCl、1.4mMのCaCl2、0.8mMのMgCl2、1.5mMのNa2HPO4、0.2mMのNaH2PO4、pH7.4、100μg/mlのラット血清アルブミン、50μg/mlのゲンタマイシン
2.0.9%NaCl中
3.H2O中
1.8から50個の核酸塩基を含む、配列番号1または配列番号2または配列番号94または配列番号95または配列番号96の部分配列に少なくとも80%同一の配列を有するオリゴヌクレオチドであって、
該配列が、TGF−RまたはTGF−RIIをコードする遺伝子のオープンリーディングフレームの翻訳開始コドンまたは翻訳終止コドンを含む領域、あるいは「ループ」または「バルジ」でありそして二次構造の部分ではないTGF−RまたはTGF−RIIをコードするmRNAの領域と十分にハイブリダイズし得、そして該配列の模倣物、変異体、塩、および光学異性体である、オリゴヌクレオチド。
配列番号3:5’−CAGCCCCCGACCCATG−3’
配列番号33:5’−CAGCCCCCGACCCATGGCAG−3’
配列番号34:5’−CAGCCCCCGACCCATGGCA−3’
配列番号35:5’−CAGCCCCCGACCCATGGC−3’
配列番号36:5’−CAGCCCCCGACCCATGG−3’
配列番号41:5’−GCAGCCCCCGACCCATGGCA−3’
配列番号42:5’−GCAGCCCCCGACCCATGGC−3’
配列番号43:5’−GCAGCCCCCGACCCATGG−3’
配列番号44:5’−GCAGCCCCCGACCCATG−3’
配列番号49:5’−AGCAGCCCCCGACCCATGGC−3’
配列番号50:5’−AGCAGCCCCCGACCCATGG−3’
配列番号51:5’−AGCAGCCCCCGACCCATG−3’
配列番号56:5’−GAGCAGCCCCCGACCCATGG−3’
配列番号57:5’−GAGCAGCCCCCGACCCATG−3’
配列番号62:5’−TGAGCAGCCCCCGACCCATG−3’
配列番号73:5’−ATGTGAAGATGGGCAAGACC−3’
配列番号74:5’−ATCTCCATGTGAAGATGGGC−3’
配列番号75:5’−AACGGCCTATCTCGAGGAAT−3’
配列番号76:5’−AACATCGTCGAGCAATTTCC−3’
配列番号77:5’−AATCCAACTCCTTTGCCCTT−3’
配列番号78:5’−AAACCTGAGCCAGAACCTGA−3’
配列番号79:5’−AGGGCGATCTAATGAAGGGT−3’
配列番号80:5’−AGTGCACAGAAAGGACCCAC−3’
配列番号81:5’−ACACTGGTCCAGCAATGACA−3’
配列番号82:5’−TTCCTGTTGACTGAGTTGCG−3’
配列番号83:5’−CACTCTGTGGTTTGGAGCAA−3’
配列番号84:5’−CAAGGCCAGGTGATGACTTT−3’
配列番号85:5’−CACACTGGTCCAGCAATGAC−3’
配列番号86:5’−CTGACACCAACCAGAGCTGA−3’
配列番号87:5’−CTCTGCCATCTGTTTGGGAT−3’
配列番号88:5’−TCAAAAAGGGATCCATGCTC−3’
配列番号89:5’−TGACACCAACCAGAGCTGAG−3’
配列番号90:5’−TGATGCCTTCCTGTTGACTG−3’
配列番号91:5’−TTCCTGTTGACTGAGTTGCG−3’
配列番号92:5’−TTCTCCAAATCGACCTTTGC−3’
配列番号93:5’−GGAGAGTTCAGGCAAAGCTG−3’
を含む群から選択される、オリゴヌクレオチド。
該アンチセンス化合物が、アンチセンスオリゴヌクレオチドを転写できるベクターおよび/またはリボザイム、外部ガイド配列(EGS)、オリゴザイム、短触媒RNA、および触媒オリゴヌクレオチドの少なくとも1つを含む群より選択され、そしてTGF−RまたはTGF−RIIをコードする標的核酸にハイブリダイズし、そしてその発現を阻害する、薬学的調製物。
該アンチセンス化合物が、アンチセンスオリゴヌクレオチドを転写できるベクターおよび/またはリボザイム、外部ガイド配列(EGS)、オリゴザイム、短触媒RNA、および触媒オリゴヌクレオチドの少なくとも1つを含む群より選択され、そしてTGF−RまたはTGF−RIIをコードする標的核酸にハイブリダイズし、そしてその発現を阻害する、使用。
該アンチセンス化合物が、アンチセンスオリゴヌクレオチドを転写できるベクターおよび/またはリボザイム、外部ガイド配列(EGS)、オリゴザイム、短触媒RNA、および触媒オリゴヌクレオチドの少なくとも1つを含む群より選択され、そしてTGF−RまたはTGF−RIIをコードする標的核酸にハイブリダイズし、そしてその発現を阻害する、使用。
(a)TGF−β1およびニューロン前駆細胞を含む試験システムとともに、候補化合物をインキュベートする工程;および
(b)活性なTGFレセプターの発現または該ニューロン前駆細胞の増殖をアッセイする工程;
を包含し、
(c)該試験化合物の不在下での試験システムと比較して、(i)活性なTGFレセプターの発現の抑制の廃絶、または(ii)ニューロン前駆細胞の増殖の抑制の廃絶が、所望の特性を有する候補化合物の存在を示す、
方法。
Claims (7)
- 損傷を受けた神経経路の好結果の再生および機能的な再連結を促進するためのオリゴヌクレオチドの使用であって、
該オリゴヌクレオチドが、8から50個の核酸塩基を含む、配列番号1または配列番号2の部分配列に少なくとも80%同一の配列を有するオリゴヌクレオチド、ならびに該配列の塩、および光学異性体の少なくとも1つであり、
該配列が、TGF−RIIをコードする遺伝子のオープンリーディングフレームの翻訳開始コドンを含む領域と十分にハイブリダイズし得る、使用。 - 損傷を受けた神経経路の好結果の再生および機能的な再連結を促進するための薬学的調製物であって、
請求項1に記載のオリゴヌクレオチドの少なくとも1つ、および/または該オリゴヌクレオチドの少なくとも1つを転写させるベクターを含むアンチセンス化合物の少なくとも1つ、または請求項1に記載の少なくとも1つのオリゴヌクレオチドを含む薬学的処方物の少なくとも1つを含む、薬学的調製物。 - 神経変性、外傷性の/外傷後の、血管の/低酸素性の、神経炎症性の、および感染後の中枢神経系疾患、および加齢に伴う神経幹細胞再生の減少の予防、治療的予防、および治療のための薬学的調製物であって、
請求項1に記載のオリゴヌクレオチドの少なくとも1つ、および/または該オリゴヌクレオチドの少なくとも1つを転写させるベクターを含むアンチセンス化合物の少なくとも1つ、または請求項1に記載の少なくとも1つのオリゴヌクレオチドを含む薬学的処方物の少なくとも1つを含む、薬学的調製物。 - アップレギュレートされたまたは高められたTGF−RIIのレベルに関連する疾患において、TGF−RIIの発現を阻害するための、請求項3に記載の薬学的調製物。
- 前記アップレギュレートされたまたは高められたTGF−RIIのレベルに関連する疾患、または神経変性疾患および炎症性神経疾患が、アルツハイマー病、パーキンソン病、クロイツフェルトヤコブ病(CJD)、異型クロイツフェルトヤコブ病(nvCJD)、ハレルフォルデンスパッツ病、ハンチントン病、多発性萎縮症(Multisystem Atrophy)、痴呆、前頭側頭型痴呆、筋萎縮性側索硬化症、脊髄性筋萎縮症、脊髄小脳萎縮症(SCA)、またはその他の運動ニューロン疾患、精神分裂病、感情の障害、大うつ病、髄膜脳炎、細菌性髄膜脳炎、ウイルス性髄膜脳炎、CNS自己免疫疾患、多発性硬化症(MS)、急性虚血/低酸素性障害、卒中、CNSおよび脊髄外傷、頭部および脊柱外傷、動脈硬化症、アテローム性動脈硬化症、微小血管性痴呆、ビンスワンゲル病、白質病変、網膜変性、蝸牛変性、黄斑変性、迷路性難聴、AIDS関連痴呆、色素性網膜炎、脆弱X染色体に関連する震え/運動失調症候群(FXTAS)、進行性核上麻痺(PSP)、線条体黒質変性症(SND)、オリーブ橋小脳変性(OPCD)、シャイ・ドレーガー症候群(SDS)、加齢依存的記憶障害、痴呆に関連する神経発達障害、ダウン症候群、シヌクレイン障害、スーパーオキサイドジスムターゼ変異、トリヌクレオチド反復疾患、トラウマ、低酸素症、血管疾患、血管炎症、CNS老化を含む群から選択される、請求項3または4に記載の薬学的調製物。
- アップレギュレートされたまたは高められたTGF−RIIのシグナリングに関連する疾患において、TGF−βの活性を阻害するための、請求項3に記載の薬学的調製物。
- 前記アップレギュレートされたまたは高められたTGF−RIIのシグナリングに関連する疾患、または神経変性疾患および炎症性神経疾患が、アルツハイマー病、パーキンソン病、クロイツフェルトヤコブ病(CJD)、異型クロイツフェルトヤコブ病(nvCJD)、ハレルフォルデンスパッツ病、ハンチントン病、多発性萎縮症(Multisystem Atrophy)、痴呆、前頭側頭型痴呆、筋萎縮性側索硬化症、脊髄性筋萎縮症、脊髄小脳萎縮症(SCA)、またはその他の運動ニューロン疾患、精神分裂病、感情の障害、大うつ病、髄膜脳炎、細菌性髄膜脳炎、ウイルス性髄膜脳炎、CNS自己免疫疾患、多発性硬化症(MS)、急性虚血/低酸素性障害、卒中、CNSおよび脊髄外傷、頭部および脊柱外傷、動脈硬化症、アテローム性動脈硬化症、微小血管性痴呆、ビンスワンゲル病、白質病変、網膜変性、蝸牛変性、黄斑変性、迷路性難聴、AIDS関連痴呆、色素性網膜炎、脆弱X染色体に関連する震え/運動失調症候群(FXTAS)、進行性核上麻痺(PSP)、線条体黒質変性症(SND)、オリーブ橋小脳変性(OPCD)、シャイ・ドレーガー症候群(SDS)、加齢依存的記憶障害、痴呆に関連する神経発達障害、ダウン症候群、シヌクレイン障害、スーパーオキサイドジスムターゼ変異、トリヌクレオチド反復疾患、トラウマ、低酸素症、血管疾患、血管炎症、CNS老化を含む群から選択される、請求項3または6に記載の薬学的調製物。
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| MXPA06008964A (es) | 2007-02-02 |
| KR100880371B1 (ko) | 2009-01-30 |
| JP2007521815A (ja) | 2007-08-09 |
| WO2005074981A2 (en) | 2005-08-18 |
| WO2005074981A3 (en) | 2006-01-12 |
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| EP1716235A2 (en) | 2006-11-02 |
| ZA200606460B (en) | 2008-02-27 |
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| CA2555463A1 (en) | 2005-08-18 |
| IL177320A (en) | 2012-03-29 |
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| NZ548926A (en) | 2009-07-31 |
| EP1716235B1 (en) | 2012-06-06 |
| JP4848042B2 (ja) | 2011-12-28 |
| JP4712728B2 (ja) | 2011-06-29 |
| CA2555463C (en) | 2013-05-14 |
| CN1989244B (zh) | 2013-04-03 |
| US20110263678A1 (en) | 2011-10-27 |
| RU2006129326A (ru) | 2008-03-20 |
| PL1716235T3 (pl) | 2012-11-30 |
| AU2005210151A1 (en) | 2005-08-18 |
| ES2387593T3 (es) | 2012-09-26 |
| KR20070004695A (ko) | 2007-01-09 |
| RU2385933C2 (ru) | 2010-04-10 |
| WO2005074981A8 (en) | 2010-04-15 |
| IL177320A0 (en) | 2006-12-10 |
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