JP5341311B2 - Nogoレセプター結合タンパク質 - Google Patents
Nogoレセプター結合タンパク質 Download PDFInfo
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- JP5341311B2 JP5341311B2 JP2006507330A JP2006507330A JP5341311B2 JP 5341311 B2 JP5341311 B2 JP 5341311B2 JP 2006507330 A JP2006507330 A JP 2006507330A JP 2006507330 A JP2006507330 A JP 2006507330A JP 5341311 B2 JP5341311 B2 JP 5341311B2
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Description
本発明は、神経学、神経生物学および分子生物学に関する。より詳細には、本発明は、神経学的疾患、神経学的障害および神経学的損傷(例えば、脊髄損傷)の処置のための分子および方法に関する。
軸索および樹状突起は、ニューロンから伸長する。伸長する軸索または神経突起の遠位端は、成長円錐として公知の特定の領域を含む。成長円錐は、局所的環境を感じ取り、ニューロンの標的細胞に向かう軸索成長を誘導する。成長円錐は、環境の合図(例えば、表面への接着、成長因子、神経伝達物質および電場)に応答する。上記成長円錐は、一般的に、一日に1mm〜2mmの速度で成長する。上記成長円錐は、ラメリポディウムおよび糸状足として分類される伸長手段によって、その前方領域およびいずれもの側方領域を探索する。伸長部が不都合な表面に接触する場合、その伸長部は引っ込む。伸長部が、都合のよい成長表面と接触する場合、その伸長部は、伸長を続け、上記成長円錐をその方向に誘導する。上記成長円錐が適切な標的細胞に到達する場合、シナプス結合が生成される。
発明者らは、「Sp35」と称されるポリペプチド(発明者らが命名)に関する種々の発見を行ってきた。Sp35のための代替的な名称としては、「LINGO」および「LINGO−1」が挙げられる。発明者らの発見は、以下を含む。Sp35は、NgR1に結合する。Sp35は、同型相互作用で、それ自体に結合する。Sp35−Fc融合タンパク質は、顆粒状ニューロンにおいて、線維束性攣縮を誘導または促進する。Sp35−Fc融合タンパク質は、赤核脊髄路半側切除損傷モデルおよび視神経離断モデルの両方において、ニューロンの生存を促進する。Sp35レトロウイルス感染皮質初代細胞は、脊髄損傷ラットに送達される場合、ニューロン生存の促進、軸索のβIIIチューブリン染色の増大およびミエリン含量の上昇をもたらす。
(a)Sp35ポリペプチドであって:(a)このポリペプチドが(i)Sp35 LRRドメイン、(ii)このLRRドメインに対してC末端側のSp35塩基性領域および(iii)この塩基性領域に対してC末端側のSp35免疫グロブリン(Ig)ドメイン、を含み;そして(b)このポリペプチドが、膜貫通ドメインを欠く、ポリペプチド;ならびに
(b)Sp35 Igドメインを含み、そして、Sp35 LRRドメイン、Sp35塩基性領域、膜貫通ドメインおよび細胞質ドメインを欠くSp35ポリペプチド。
天然に生じるヒトSp35は、614アミノ酸を含むグリコシル化CNS特異的タンパク質である(図2;配列番号2)。ヒト全長野生型Sp35ポリペプチドは、14個のロイシンリッチ繰返し配列からなるLRRドメイン(N末端キャップおよびC末端キャップを含む)、Igドメイン、膜貫通領域および細胞質ドメインを含む(図3)。上記細胞質ドメインは、典型的なチロシンリン酸化部位を含む。さらに、上記天然に生じるSp35タンパク質は、シグナル配列、LRRCTとIgドメインとの間の短い塩基性領域およびこのIgドメインと上記細胞質ドメインと間の膜貫通領域を含む(図3)。ヒトSp35遺伝子は、代替的な翻訳開始コドンを含み、それにより、6個のさらなるアミノ酸(すなわち、MQVSKR(配列番号9))が、上記Sp35シグナル配列のN末端に存在していても存在していなくてもよい。表1は、図2の配列(配列番号2)に基づいたアミノ酸残基番号に従って、上記Sp35ドメインおよび他の領域を列挙する。
本発明のいくつかの実施形態は、Sp35部分が異種ポリペプチド部分に融合されてSp35融合タンパク質を形成するSp35ポリペプチド(例えば、Sp35アンタゴニストポリペプチド)の使用を含む。Sp35融合タンパク質は、種々の目的(例えば、血清半減期の上昇、バイオアベイラビリティの改善、特定の器官または組織のタイプに対するインビボ標的化、組換え発現効率の改善、宿主細胞分泌の改善、精製の容易化および高いアビディティ)を達成するために使用され得る。達成されるべき目的に依存して、上記異種部分は、不活性であっても生物学的に活性であってもよい。また、上記異種部分は、インビボまたはインビトロにおいて、上記Sp35部分に安定に融合されるかまたは切断可能であるように選択され得る。異なる目的を達成するための異種部分は、当該分野において公知である。
Sp35(aa 34〜532)+IgG1 Fc+OMgp(アミノ酸残基25〜400);および
Sp35(aa 34〜532)+HSA+OMgp(アミノ酸残基25〜400)。
Sp35(aa 34〜532)+IgG1 Fc+MAG(アミノ酸残基12〜500);および
Sp35(aa 34〜532)+HSA+MAG(アミノ酸残基12〜500)。
Sp35(aa 34〜532)+IgG1 Fc+Nogo66(NogoA アミノ酸残基1056〜1122);
Sp35(aa 34〜532)+HSA+Nogo66(NogoA アミノ酸残基1056〜1122);
Sp35(aa 34〜532)+IgG1 Fc+アミノNogo(NogoA アミノ酸残基1〜949);および
Sp35(aa 34〜532)+HSA+アミノNogo(NogoA アミノ酸残基1〜949)。
本発明のいくつかの実施形態は、Sp35ポリペプチドを含み、1つ以上のポリマーが、上記Sp35ポリペプチドに結合(共有結合)される。このような結合のために適切なポリマーの例としては、(上で議論された)ポリペプチド、糖ポリマーおよびポリアルキレングリコール鎖が挙げられる。代表的に、ポリマーは、以下のうちの1つ以上を改善する目的のために上記Sp35ポリペプチドに結合されるが、必ずしもそうでなくてもよい:可溶性、安定性またはバイオアベイラビリティ。
本発明は、Sp35ポリペプチドをコードする核酸を含むベクターを提供する。ベクターおよび本発明の核酸が作動可能に連結する発現制御配列の選択は、所望される機能特性(例えば、タンパク質発現)および形質転換されるべき宿主細胞に依存する。
宿主細胞は、原核生物起源または真核生物起源であり得る。好ましい真核生物の宿主細胞としては、限定されないが、酵母細胞および哺乳動物細胞(例えば、チャイニーズハムスター卵巣細胞(CHO)(ATCC登録番号CCL61)、NIHのスイスマウス胚細胞NIH−3T3(ATCC登録番号CRL1658)、および新生児のハムスター腎臓細胞(BHK))が挙げられる。他の有用な真核生物の宿主細胞としては、昆虫細胞および植物細胞が挙げられる。例示的な原核生物の宿主細胞は、E.coliおよびStreptomycesである。
Sp35ポリペプチド、抗Sp35抗体、または抗Sp35抗体の抗原結合フラングメントを含む組成物は、適切な薬学的に受容可能なキャリアを含み得る。例えば、それらは、作用部位への送達のために設計された調製物への、活性化合物の処理を促進する賦形剤および/または補助剤を含み得る。非経口投与のための適切な処方物としては、水溶性形態(例えば、水溶性塩)の活性化合物の水溶液が挙げられる。さらに、適切な油状の注射懸濁液のような活性化合物の懸濁液が、投与され得る。適切な新油性溶媒またはビヒクルとしては、脂肪油(例えば、ゴマ油、または合成脂肪酸エステル(例えば、オレイン酸エチルまたはトリグリセリド))が挙げられる。水溶性の注射懸濁液は、懸濁液の粘性を増加させる物質(例えば、カルボキシメチルセルロースナトリウム、ソルビトールおよびデキストランが挙げられる)を含み得る。必要に応じて、懸濁液はまた、安定剤を含み得る。リポソームもまた、細胞または間隙の空間の中への送達のために本発明の分子をカプセル化するために使用され得る。例示的な薬学的に受容可能なキャリアは、生理学的に適合性のある溶媒、分散媒、コーティング、抗菌剤および抗真菌剤、等張剤および吸収遅延剤、水、生理食塩水、リン酸緩衝化生理食塩水、デキストロース、グリセロール、エタノールなどである。いくつかの実施形態において、組成物は、等張剤(例えば、糖、ポリアルコール(例えば、マンニトール)、ソルビトール、または塩化ナトリウム)を含む。いくつかの実施形態において、組成物は、薬学的に受容可能な物質(例えば、湿潤剤または少量の補助的な物質(例えば、湿潤剤もしくは乳化剤、防腐剤または緩衝液))を含み、これらは、活性成分の貯蔵寿命または有効性を高める。
Sp35ポリペプチドは、軸策の伸長の阻害を減少させることが治療的に有益であるCNS疾患、CNS障害またはCNS損傷の処置のための遺伝子治療アプローチを使用して、哺乳動物(例えば、ヒト患者)においてインビボで生成され得る。これは、適切な発現制御配列に作動可能に連結される適切なSp35ポリペプチドをコードする核酸の投与を含む。好ましくは、これらの配列は、ウイルスベクターの中へ組み込まれる。このような遺伝子治療のための適切なウイルスベクターとしては、アデノウイルスベクター、レンチウイルスベクター、バキュロウイルスベクター、Epstein Barrウイルスベクター、パポバウイルスベクター、ワクシニアウイルスベクター、単純ヘルペスベクター、およびアデノ関連ウイルス(AAV)ベクターが挙げられる。ウイルスベクターは、複製欠損のウイルスベクターであり得る。好ましいアデノウイルスベクターは、そのE1遺伝子またはE3遺伝子に欠損を有し得る。アデノウイルスベクターが使用される場合、好ましくは、哺乳動物は、選択マーカー遺伝子をコードする核酸に曝露されない。
ヒトの組織におけるSp35の発現をノーザンブロット解析によって調べた。12個のヒトの主要な組織または14個のヒトのCNS組織を含む複数の組織ブロットを、P32で標識したSp35プローブ(Sp35cDNA配列のヌクレオチド150〜450)を用いて68℃で一晩ハイブリダイズした。そのブロットを、2×SSC、0.5%SDSで3回洗浄し、次いで、0.5×SSC、0.1%SDSで3回洗浄した。次いで、そのブロットをX線フィルムに露光し、mRNAレベルをオートラジオグラフィーによって可視化した。
Sp35の生物学的機能を研究するために、ヒトSp35の細胞外部分(残基1〜531)をヒトIgG1のヒンジ領域およびFc領域と融合して、構築物を作製した。ヒトSp35を部分的にコードする配列を、
Sp35についてのレセプターを研究および単離するために、Hisタグ化アルカリホスファターゼ(His−Ap)融合タンパク質として、COS7細胞およびCHO細胞においてタンパク質を発現させた。プラスミドを以下のように構築した:Sp35の細胞外ドメイン(a.a.34〜532)を、Eco RI切断部位(下線)を含むプライマー(フォワード)
ベクターDNA(8μg)を、リポフェクタミン(Invitrogen)を使用して、5×106個の細胞をトランスフェクトするために使用した。馴化培地を、トランスフェクションの48時間後に、収集した。
NgR1へのSp35結合を示すために、4つの異なる方法を使用した。第1に、本発明者らは、アルカリホスファターゼSp35結合体(AP−Sp35)を、NgR1発現細胞と一緒にインキュベートし、色素形成のAP検出試薬を使用して結合を評価する、直接的な結合アッセイにおいて相互作用を検出した。90%コンフルエントのCOS7細胞を、100mm組織培養皿上で増殖させ、Fugene6試薬(Roche)を使用して、NgR1発現プラスミドを用いてトランスフェクトした。48時間後、トランスフェクトした細胞を、HBH(Hankの平衡化塩緩衝液、1mg/ml BSA、20mM HEPES、pH7.0)で1回洗浄し、次いで、HBH中の4μg/mlのAP−Sp35融合タンパク質と一緒に、23℃で1.5時間インキュベートした。細胞を、氷冷のHBH緩衝液で、各々3分間で3回洗浄し、次いで、15分間、20mM HEPES、pH7.0、150mM NaCl中の3.7%ホルムアルデヒドで固定し、HBH緩衝液の中へ移して戻した。内因性の熱に不安定なAPを、67℃で2時間、熱不活性化した。結合したAP−Sp35を、ニトロブルーテトラゾリウムNBT(Roche)と共にインキュベーションすることによって検出した。Ap−Sp35は、ヒトNgR1レセプターを発現するCOS7細胞に結合したが、ベクター単独でトランスフェクトしたコントロールCOS7細胞には結合しなかった。NgR1についての点状の染色パターンが観測され、このことは、1つの画分のみ、おそらく50%の細胞がNgR1でトランスフェクトされたことを反映する。
Sp35およびNgR1が、同じニューロンにおいて発現するかどうかを決定するために、本発明者らは、共存の研究を行った。4%パラホルムアルデヒドで固体したラットのp8初代顆粒ニューロン培養物を、Sp35およびNgR1に対する抗体(Santa Cruz)と一緒にインキュベートし、次いで、適切なAlexa標識した第2の抗体(Molecular Probes Inc.)と一緒にインキュベートした。細胞を共焦点蛍光顕微鏡によって可視化した。ニューロンは、Sp35およびNgR1抗体によって強く染色した。両方のタンパク質が、細胞体およびニューロンの軸策において発現した。共存解析を補助するために、2つの型の抗体について異なる有色のプローブを使用した。染色(NgR陽性細胞については赤色そしてSp35陽性細胞については緑色)を組み合わせると、本発明者らは、2つのタンパク質がニューロン内で共存していることを示す細胞全体にわたる黄色が見えた。
本発明者らは、NgR1相互作用に関係するSp35の特異的ドメインを規定するために欠損マッピングを使用した。以下の欠損構築物を、Stratagene Quikchange Mutagenesisキットを使用して作製した。本発明者らは、改変した挿入物のDNA配列決定によって全てのベクター構築物を確認した。
ニューロンにおけるSp35の生物学的機能を決定するために、本発明者らは、Sp35−Fcを、出生後8日目の顆粒状ニューロンと共にインキュベートし、Sp35が神経突起の外向きの成長を調節し得るかどうかを観察した。Sp35−Fcタンパク質(16μg/ウェルのタンパク質)をスポットする前に、Labtek培養スライド(8ウェル)を、0.1mg/mlのポリ−D−リジン(Sigma)でコーティングした。このスライドを一晩乾燥させ、次いでリンスし、そして10μg/mlのラミニン(Gibco)でコーティングした。出生後8日目由来の小脳顆粒状ニューロンを解離し、事前コーティングしたスライド上に播種した。このスライド培養物を5%CO2中37℃で24時間インキュベートした。次いで、このスライドを20%スクロースを含有する4%パラホルムアルデヒド中で固定し、そして抗βIIIチューブリン(Covance TUJ1)で染色した。24時間後、CGNはニューロンの束状化(bundling)で明らかなように、はっきりした束形成形態を示した。この束形成は、未処理細胞コントロールまたはFcタンパク質コーティング化サンプルコントロールでは見られなかった。
Sp35−Fcは、束形成を引き起こす出生後の小脳顆粒状ニューロンを誘発した。シグナル伝達分子RhoAが束形成に関与することは公知であるので、本発明者らは、Sp35−FcがニューロンにおいてRhoA機能を調節し得るかどうかを決定した。本発明者らは、以下のようにRhoA活性化実験を行った:293細胞またはCOS7細胞を、Fugene 6試薬(Roche)を使用して、RhoA、Sp35またはNgR1の組み合わせを含む発現ベクターでトランスフェクトした。トランスフェクションの48時間後、細胞を一晩血清飢餓にし、次いで50mM Tris(pH7.5)、1% Triton X−100、0.5%デオキシコール酸ナトリウム、0.1% SDS、500mM NaCl、10mM MgCl2、さらにプロテアーゼインヒビターカクテルでリンスした。細胞溶解物を、13,000×g、4℃、5分間の遠心分離によって清澄化し、そして95%の上清を、4℃で45分間、20μgの固定化GST−Rho結合ドメイン親和性マトリックス(Rhotekinビーズ、Upstate Biotechnology)と共にインキュベートした。このビーズを、洗浄用緩衝液(50mM Tris(pH7.5)、1% Triton X−100、150mM NaCl、10mM MgCl2、およびプロテアーゼインヒビター)で3回洗浄した。GTP結合Rhoを、SDS−PAGEサンプル緩衝液中95℃で5分間加熱することによって、上記ビーズから溶出させた。結合Rhoタンパク質、およびRhoタンパク質の全体を、RhoAに対するモノクローナル抗体(Santa Cruz)を使用してウェスタンブロッティングによって検出した。Sp35遺伝子でのトランスフェクション後のブロットで検出されたRhoA−GTPの量の増加によって明らかなように、Sp35でトランスフェクトされたCOS7細胞およびHEK293細胞は、RhoA活性化を誘発した。RhoA−GTPのさらなる増加は、Sp35−Fcでの処理後に観察された。Sp35単独でのトランスフェクト後のRhoA−GTPの増加と対照的に、細胞をSp35およびNgR1でトランスフェクトした場合、RhoAは部分的に不活性化された。Sp35−Fcでのこれらの細胞の処理は、RhoAのさらなる不活性化をもたらした。
LRRドメインはホモタイプな相互作用にしばしば関与し、そして、本発明者らはSp35でトランスフェクトされた細胞への可溶性Sp35の添加がSp35トランスフェクション単独で観察されたRhoA−GTPの増加を越えるRhoA−GTPの増加を引き起こすことを観察したので、本発明者らは、Sp35自体に結合するSp35について試験した。この試験を行うために、本発明者らは、免疫共沈降を使用した。COS7細胞の80%コンフルエント(100mm組織培養皿上で増殖された)を、Fugene 6試薬(Roche)を使用して、プラスミドSp35 HAまたはプラスミドSp35−FLAG、あるいはその両方でトランスフェクトした。トランスフェクションの48時間後、細胞を収集し、そして4℃で30分間、1mlの溶解緩衝液(50mM HEPES(pH7.5)、150mM NaCl、1.5mM MgCl2、1mM EGTA、1% Triton X−100、および10%グリセロール)中に溶解した。次いで、この溶解物を14,000×gで15分間遠心分離し、そして上清を収集し、4℃で一晩撹拌しながら抗HA親和性マトリックス(Roche)と共にインキュベートした。次いで、このサンプルを1mlの溶解緩衝液で3回洗浄し、Laemmliサンプル緩衝液中で煮沸し、4〜15%SDS−PAGEに供し、そして抗FLAG抗体での免疫ブロッティングによって分析した。ウェスタンブロッティングによって決定されたように、この抗HA抗体樹脂は、Sp35−FLAGを含んだ複合体を捕獲した。これは、Sp35とSp35自体との直接的な相互作用を示した。本研究者らはまた、Sp35−Fcと一緒にHA−Sp35でトランスフェクトされた細胞を処理し、そして類似の免疫沈降アプローチを使用して、HA−Sp35がSp35−Fcに結合することを示した。
脊髄損傷ラットにおけるSp35の生物学的機能を決定するために、本発明者らは、皮質性初代培養細胞(混合培養物)を、(ラット脊髄の損傷中心への送達のため)全長Sp35を発現するレトロウイルスまたはレトロウイルスコントロールで感染させた。2×106個の細胞を導入し、そしてラットを10日目に屠殺した。この脊髄を4%パラホルムアルデヒド中で一晩固定し、次いで、70%ETOH中で脱水し、続いて95%ETOH中で脱水した。組織サンプルをパラフィン中に包埋した。切片(10ミクロン厚)を、免疫組織化学的染色のために使用した。コントロールと比較して、Sp35発現細胞を受け取ったラットは、より少ない軸索退縮を示し、そして上記中心近くに染まったより多くのβチューブリンを示す。Sp35を受け取る損傷ラットにおいて、上昇したニューロンの生存が観察された。
外科的手順の全てを、無菌技術を使用して行う。任意の外科的処置前の一週間、動物を取り扱う。アンピシリン100mg/kgを、SCに手術の前および後に予防的に投与し、膀胱感染損傷の発生を減少させた。
pMIG由来のSp−35ウイルスベクターを、以下のように作製した。全長Sp35コード配列を、XhoI部位を含むプライマー:
雌性のLong Evansラットを、全ての研究に使用する。ラットを、イソフルランを使用して麻酔し、T3/T4露出をし、そして背側半椎弓切除を行う。次いで、化学的脱髄剤であるリソレクチン(0.9%生理食塩水中1%リソレクチン3μl)を、索表面より0.5〜1mm下の脊髄の脊柱の右側に注入する。適切な鎮痛処置を手術前後に施す。
脳機能におけるSp35の役割に取り組むために、本発明者らは、レンチウイルスSp35 RNAiを出生後8日目のCGN細胞に導入した。Sp35 RNAi感染細胞は、コントロール細胞よりも短い神経突起を有し、そしてコントロール細胞よりも高い増殖速度を有した。これらの結果は、RhoA活性化を調節することにおけるSp35についての役割を示す。
NgR1およびSP35を共発現するCOS7細胞は、OMgpに応答してRhoA/GTPレベルの変化を示さなかった。これは、SP35/NgR1複合体がミエリンインヒビターによるシグナル伝達を媒介するのに重要でないことを示唆した。
等数のラットp6小脳顆粒ニューロンを、50nMのsp35−Fcタンパク質の存在下または非存在下で、12ウェルの細胞培養プレートの各ウェルにプレートした。これらのポリ−D−リジンプレートを、10μgのCNSミエリンまたは200ngのNogo66、MAGおよびOMgpまたはコントロール−Fcで事前コーティングした(乾燥させた)。このニューロン培養物を、1〜7日間、37℃で、および5%CO2で維持した。ニューロンは、3日後に検査した(ニューロンの特異性マーカー IIIチューブリンによって決定した)ところ、十分な神経突起伸長をして、sp35−Fc処理とは無関係に、PBSコントロールウェルにおいて健常であり、そして良好に成長した。sp35−Fcの非存在下では、ニューロンは、ミエリン、Nogo66、MAGおよびOMgpでコーティングされたウェルにおいて良好に成長しなかった。最小限の神経突起出芽(短く、歪曲した)が存在し、そしてこのニューロンは健常には見えず、丸い細胞体および縮合された核物質を有した。DAPI染色は、これらのウェルで検出されたニューロンの数が、PBSコントロールウェル中で検出されたニューロンの数よりも少なく、ニューロンの損失を示唆していることを示した。sp35−Fcの存在下では、長い神経突起が存在し、そしてこのニューロンは健常に見えた。DAPI染色は、sp35−Fcを受け取らなかったウェルよりも、これらのウェル中でニューロンの数がより多いことを実証した。このデータを、以下の表2に要約する。
Sp35−Fcは、インビトロでOMgp、Nogo−66およびMAGによって引き起こされる神経突起成長阻害を低減させたので、本発明者らは、この分子がインビボでCNS損傷の機能回復を促進することを予測した。これを確かめるために、本発明者らは、脊髄を半分切除したラット(すなわち、急性CNS外傷の動物モデル)にSp35−Fcを投与した。図8および図9に示されるように、Sp35−Fc処置ラットは、IgGで処置されたコントロールラットと比較して、有意に向上した機能回復を示した。
本研究者らはまた、歩行運動に直接的に寄与する赤核脊髄路におけるニューロンの再生に対するSp35処置の効果を調査した。
本発明者らは、視神経切除モデルを使用してSp35の活性をさらに確認した。これは、ニューロンの機能に影響を与える因子を調査する。若年成体の雌のSprague Dawley(SD)ラットを、この研究で使用した。各動物の右側の視神経を、眼窩内で、視神経円板から1.5mm切除した。6%フルオロゴールド(FG)で浸漬した1つのゲルフォームを、視神経円板の真後ろの新たに切除した部位に適用し、生存網膜神経節細胞(RGC)を標識した。この動物を、6つの群(各群においてn=6)に分割しSp35−Fc、ヒトIgG1、またはPBSのみのいずれかを硝子体内注入によって与えた。各硝子体内注入の体積は、4mlであった。他方、各注入の投与量は2mgであった。この硝子体内注入を、視神経切除の直後に行った。
他の実施形態は、添付の特許請求の範囲内である。
Claims (29)
- 単離された核酸を含む、NgR1に結合してNgR1の機能を阻止、阻害または妨害するための組成物であって、該核酸が、以下:
(a)配列番号2のアミノ酸34〜432からなる可溶性ポリペプチド;
(b)配列番号2のアミノ酸417〜531からなる可溶性ポリペプチド;および
(c)配列番号2のアミノ酸425〜531からなる可溶性ポリペプチドからなる群より選択される可溶性Sp35ポリペプチドをコードするヌクレオチド配列を含み、ここで、(a)〜(c)の該可溶性ポリペプチドが膜貫通ドメインを欠く、組成物。 - 中枢神経系ニューロンの軸索伸長阻害を減少させるための組成物であって、配列番号2のアミノ酸1〜531または配列番号2のアミノ酸34〜532からなる可溶性Sp35ポリペプチドをコードする単離された核酸を含み、該可溶性Sp35ポリペプチドが膜貫通ドメインを欠く、組成物。
- 単離された核酸を含む、NgR1に結合してNgR1の機能を阻止、阻害または妨害するための組成物であって、該核酸が、ポリペプチドをコードするヌクレオチド配列を含み、該ポリペプチドが、Sp35領域LSPRKH(配列番号10)からなり、そして該ポリペプチドが環化されたものである、組成物。
- 前記可溶性Sp35ポリペプチドは非Sp35部分に融合されたものである、請求項1に記載の組成物。
- 請求項4に記載の組成物であって、前記非Sp35部分が、Ig部分、血清アルブミン部分、標的化部分、レポーター部分および精製容易化部分からなる群より選択される、組成物。
- 請求項5に記載の組成物であって、前記Ig部分がFc部分である、組成物。
- 請求項1または3に記載の核酸を含むベクターを含む、NgR1に結合してNgR1の機能を阻止、阻害または妨害するための組成物。
- 請求項2に記載の核酸を含むベクターを含む、中枢神経系ニューロンの軸索伸長阻害を減少させるための組成物。
- 請求項7または8に記載の組成物であって、前記核酸が、発現制御配列に作動可能に結合される、組成物。
- 請求項1または3〜6のいずれか1項に記載の核酸によりコードされる単離されたSp35ポリペプチドを含む、NgR1に結合してNgR1の機能を阻止、阻害または妨害するための組成物。
- 請求項2に記載の核酸によってコードされる単離されたポリペプチドを含む、中枢神経系ニューロンの軸索伸長阻害を減少させるための組成物。
- 請求項10に記載の組成物であって、前記ポリペプチドが、ポリマーに結合される、組成物。
- 請求項12に記載の組成物であって、前記ポリマーが、ポリアルキレングリコール、糖ポリマーおよびポリペプチドからなる群より選択される、組成物。
- 請求項13に記載の組成物であって、前記ポリアルキレングリコールがポリエチレングリコール(PEG)である、組成物。
- 請求項12に記載の組成物であって、前記ポリペプチドが、1つ、2つ、3つまたは4つのポリマーに結合される、組成物。
- 請求項15に記載の組成物であって、前記ポリマーの総分子量が、20,000Da〜40,000Daである、組成物。
- 配列番号2のポリペプチドに特異的に結合する抗体または該抗体の抗原結合フラグメントを含む中枢神経系(CNS)ニューロンの軸索伸長阻害を減少させるための組成物。
- NgR1によるシグナル伝達を阻害するインビトロ方法であって、該方法が、NgR1発現細胞と有効量の請求項10または12〜16のいずれか1項に記載のSp35ポリペプチド、または請求項17に記載の抗体もしくはそのフラグメントとを接触させる工程を包含する、方法。
- 中枢神経系(CNS)ニューロンの軸索成長阻害を減少するインビトロ方法であって、該方法が、該ニューロンと有効量の請求項11に記載のSp35ポリペプチド、または請求項17に記載の抗体またはそのフラグメントとを接触させる工程を包含する、方法。
- CNSニューロンの成長円錐崩壊を阻害するインビトロ方法であって、該方法が、該ニューロンと有効量の請求項10〜16のいずれか1項に記載のSp35ポリペプチド、または請求項17に記載の抗体もしくはそのフラグメントとを接触させる工程を包含する、方法。
- ニューロンの生存を増大するインビトロ方法であって、該方法が、該ニューロンと有効量の請求項10〜16のいずれか1項に記載のSp35ポリペプチド、または請求項17に記載の抗体またはそのフラグメントとを接触させる工程を包含する、方法。
- 哺乳動物における多発性硬化症を処置するための医薬の調製における、請求項10〜16のいずれか1項に記載のSp35ポリペプチド、または請求項17に記載の抗体もしくはそのフラグメントの使用。
- NgR1に結合してNgR1の機能を阻止、阻害または妨害するための医薬の調製における、請求項7または9のベクターを含む宿主細胞の使用。
- 中枢神経系ニューロンの軸索伸長阻害を減少させるための医薬の調製における、請求項8または9のベクターを含む宿主細胞の使用。
- 前記宿主細胞は、Sp35ポリペプチドを発現する、請求項23または24に記載の使用。
- 請求項7または9のベクターを含む宿主細胞を含む、NgR1に結合してNgR1の機能を阻止、阻害または妨害するための組成物。
- 請求項8または9のベクターを含む宿主細胞を含む、中枢神経系ニューロンの軸索伸長阻害を減少させるための組成物。
- 前記宿主細胞は、Sp35ポリペプチドを発現する、請求項26または27に記載の組成物。
- 哺乳動物における多発性硬化症を処置するための薬学的組成物であって、該組成物は、請求項10〜16のいずれか1項に記載のSp35ポリペプチド、または請求項17に記載の抗体またはそのフラグメントを含む、薬学的組成物。
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