JP2013530949A - 抗原特異的Treg並びに関連する組成物、方法及びシステム - Google Patents
抗原特異的Treg並びに関連する組成物、方法及びシステム Download PDFInfo
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Abstract
【選択図】図21
Description
本出願は、引用によって全体が本明細書に組み込まれる2010年5月20日出願の米国特許出願第61/346,837号明細書の優先権を主張する。
国立衛生研究所により授与された助成金第DK078938号に準じて、米国政府は、本発明に特定の権利を有する。
本明細書で提供されるのは、抗原特異的制御性T細胞の発生方法及びシステムである。
生後8〜10週間のSPF(特定病原体未感染の)C57Bl/6マウスを、タコニックファーム社から購入した。タコニック社から購入した生後8〜10週間のSPFBalb/cマウスを、結腸炎TNBSモデルに使用した。C57Bl/6バックグラウンドのFoxp3−GFPは、タラル・シャティラ(Talal Chatila)(カリフォルニア大学ロサンジェルス校)からの厚意による寄贈であった。Foxp3−GFPマウスは、ヘリコバクター種を持たなかった。TLR2−/−マウスは、ジャクソン社から購入した。無菌のC57Bl/6及びRag−/−マウスを、カリフォルニア工科大学のプラスチックトレクスラーアイソレータ(plastic Trexler isolators)で飼育し、加圧滅菌処理した食物及び水を与え、毎週、PCR及び微生物プレート法でスクリーンをかけ、確実に無菌にした。無菌C57Bl/6Foxp3−GFP又はFoxp3−DTRの骨髄キメラを得るために、C57Bl/6又はRag−/−無菌マウスに、致死的な放射線を照射し、Foxp3−GFPドナーの骨髄によって、後眼窩注射又は眼窩内注射することによって再形成した。マウスは即座に、新たな加圧滅菌したケージに置かれ、2ヶ月の再形成期間に亘って抗生物質(100mg/mlのゲンタマイシン及び10mg/lのエリスロマイシン)を含んだ水を与えられた。マウスには、エリスロマイシン及びゲンタマイシンに耐性である、B.フラジリスNCTC9343の株を経口的な強制飼養によって定着させた。移入実験のため、細胞の移入前に24時間、無菌Rag−/−マウスに亜致死的に放射線照射した。ジフテリアトキシン実験のため、マウスに50μg/kgのジフテリアトキシンを腹腔内に(i.p.)連続2日、その後3日置きに投与した。治療の10〜14日後の間にマウスを屠殺した。マウスは全てLbDiet500010の食事を与えられ、カリフォルニア工科大学のIACUCガイドラインの下、世話された。
CD4+CD25+又はCD4+Foxp3+細胞を、Tregの供給源として使用した。CD4+CD25−細胞を、1mlの5mMCFSEストックによって37℃で10分間パルスに供した。CFSE標識細胞をPBSで2度洗浄し、すぐに使用した。1x105マイトマイシンC(シグマ社)処理したCD4欠損脾細胞を、CFSEパルス化CD4+CD25−(又はFoxp3−)応答細胞と混合した。CD4+CD25+Treg細胞の示した希釈物を丸底の96穴プレート中に滴定し、1μg/mlの抗CD3を添加した。培養物を3〜4日間インキュベートした後、フリーサイトメトリーによって分析した。
トライゾル(インビトロゲン社)を使用して、RNAを、徴候を示した細胞から回収した。cDNAは、製造業者の指示書(バイオ−ラッド社)により、iSCRIPTcDNAsynインビトロ論文キットを用いて作製した。qRT−PCR反応を、製造業者の指示書(バイオラッド社)によってIQ SYBRグリーンスーパーミックスを使用して行った。反応はバイオ−ラッドIQ5 q−PCR機で行った。プライマーは、以下の通りである。
ICOS: F 5'-TAC TTC TGC AGC CTG TCC AT3'(配列番号1) & R 5'- CAG CAG AGC TGG GAT TCA TA-3' (配列番号2); FOXP3:F 5'-GCA ATA GTT CCT TCC CAG AGT TCT-3' (配列番号3) & R 5'-GGA TGG CCC ATC GGA TAA G-3' (配列番号4); IL-10: F-5' CTG GAC AAC ATA CTG CTA ACC G-3' (配列番号5) & R 5'-GGG CAT CAC TTC TAC CAG GTA A-3'(配列番号6); EBI3:F 5'- AGC AGC AGC CTC CTA GCC T-3'(配列番号7) & R 5'-ACG CCT TCC GGA GGG TC-3'(配列番号8); GITR: F-5' TGC CCA GCT ATA CCC TTG GT-3'(配列番号9) & R5' CCG CTC TCA TAC ACC CAC TTC-3'(配列番号10); CD25: F 5'- AAC CATAGT ACC CAG TTG TCG G-3' (配列番号11) & R 5' -TCC TAA GCA ACG CAT ATA GAC CA3'(配列番号12); L32: F 5'-AAG CGA AAC TGG CGG AAA C-3'(配列番号13) & R 5 'TAA CCG ATG TTG GGC ATC AG-3'(配列番号14).
生後8週間のBalb/cマウスをタコニック社から購入した。50μgのPSAで動物を、TNBSの投与前の6日間、1日置きに、事前処理した。50%エタノール中の0.75〜1.5%のTNBS(シグマ社)を、3.5Frシリコーンカテーテル(インステックソロモン社)を使用して直腸から染みこませた。TNBS投与後5日間、剖検まで毎日マウスの体重を量った。
結腸は、腸間膜及び残った脂肪を注意深く洗浄し、長手方向に切り裂かれた後、大きな断片(1〜1.5cm)に切り分けられた。断片を50mlのコニカルビーカーに入れ、良く冷えたPBS(インビトロゲン社)によって十分にゆすいだ。洗浄した腸断片を、15mlの上皮細胞解離溶液(5mMEDTA及び10mM Hepesを含んだ、Ca+及びMg+を含まないHBSS)中に37℃で15分間、穏やかな攪拌(100rpm)下に設置した。この工程をもう一度繰り返した。次いで断片を、カミソリの刃で細かく切り刻み、その後、消化溶液(5%FBS、3ユニット/mlのディスパーゼ、0.5mg/mlのコラゲナーゼD及び0.5mg/mlのDNAaseI(全てワーシントンバイオケミカル社から)を含んだHBSS)中に設置し、37℃でゆっくりとした回転によって20分間消化し、十分にボルテックスに供した。上清を40μm細胞ろ過器によってろ過して回収した。消化を更に2回繰り返し、LPLを8mlの40%パーコールに再懸濁し、これを80%パーコール(GEヘルスケア社)5mlの上に重ねた。遠心分離の後、LPLを40及び80%勾配の界面から回収し、洗浄し、説明される通りに使用した。
Foxp3の細胞内での細胞染色については、0.5〜1x106の細胞をまず表面染色した後、100mlの固定及び浸透緩衝液(イーバイオサイエンス社)中で浸透させ、固定した。IL−10及びIFNγ細胞内サイトカイン染色には、固有層リンパ球を抽出し、750ng/mlのイオノマイシンと50ng/mlのPMA(カルバイオケム社)によって、0.5μlのゴルジプラグ(BDバイオサイエンス社)の存在下、37℃で4〜5時間、再活性化した。続いて細胞を、表面染色し、2%のパラホルムアルデヒドによって固定した。1x106の細胞に、100μlの固定及び浸透緩衝液(イーバイオサイエンス社)を一晩浸透させた。細胞を0.3μgの抗IL−17A又はIL−10で、4℃で20分間染色した。抗体は全て、エーバイオサイエンス社から購入した。
細菌培養物を集菌し、PBSで十分に洗浄し、超音波処理に供した。崩壊した培養物を10,000Xgで20分間回転させ、上清を回収した。タンパク質濃度の決定のためにブラッドフォードを使用した。使用するまで上清を−20℃で保存した。
スラックらのプロトコールを使用して、IgAの細菌への結合を直接的に測定した(スラックら、2009年)。要するに、1mlの細菌培養物を緩衝液(PBS 1%BSA,0.05%アジ化ナトリウム)で洗浄した。溶解性の結腸内容物を緩衝液中、1:10に希釈し、更に希釈した(1:2、1:4、1:6)。25μlの抗体溶液と25μlの細菌懸濁液とを混合し、4℃で1時間インキュベートした。染色前に、モノクローナルPE−amouseIgA(1:250;エビオサイエンス社)によって細菌を30分間4℃で洗浄した。細菌を洗浄し、PFA中に固定し、対数モードでFSC及びSSCのパラメータを使用してフローサイトメトリーにより分析した。
細菌培養物1mlをペレット化して十分に洗浄し、PBS1ml中に懸濁し、超音波処理に供した。細菌性の溶菌液を20分間、10,000xgで回転させ、上清をブラッドフォードに供した。等量の溶菌液をSDSポリアクリルアミドゲル上に走らせ、PVDF膜へと移動した。膜を、5%のミルクによって室温で一晩塞いだ。等量の溶解性結腸内容物(ブラッドフォードによって測定された通り)を使用して、これらの膜を一晩、4℃でプローブした。膜を十分に洗浄した後、ビオチン結合抗マウスIgA及びストレプトアビジン−HRPによってプローブした。
小腸又は結腸を、長手方向に開き、腸内容物(排泄物及び粘液を含む)を、プロテイナーゼインヒビターの混合物を含んだ500μLのPSB(ロシュ社)中に回収した。試料の重量を測定し、8000xgで、4℃で10分回転させた。上清を回収し、使用するまで−20℃で保存した。細菌特異的なIgAELISAについては、96穴プレートを、B.フラジリス、B.テタイオタオミクロン又はB.バルガトゥスから回収した、PBS(100μL/穴)中の2μg/mlの溶菌液で、4℃で一晩、被覆した。プレートを、アッセイ希釈液(エーバイオサイエンス社)で1時間、室温で塞いだ。10μLの結腸内容物を100μLのアッセイ希釈液に希釈し、連続的に更に1/104倍まで逐次希釈した。試料を4℃で一晩放置した。ビオチンに結合した抗マウスIgAを室温で1時間、1/1000の希釈で使用し、ストレプトアビジン−HRP(サザンバイオテック社)を室温で1時間、1/1000の希釈で使用した。
データセット間での差を、マン−ホイットニーU試験又はスチューデントt検定によって、マイクロソフトエクセル又はプリズム5.0を使用して分析した。
PSAは、炎症の存在又は非存在下でTregの成長及び拡大を誘発し、誘発されたTregは、インビトロ及びインビボで機能的に抑制的である
有名なヒト共生生物であるバクテロイデスフラジリスは、カプセル状多糖類、PSAの産生によって、腸炎及び実験的結腸炎を予防する(27)。実験的腸炎からの保護の間、PSAのFoxp3+Tregに対する影響を決定するため、腸炎を誘発し、精製PSAによって経口的に治療した動物の免疫細胞を分析した。著しく体重を失った治療動物は、結腸の著しい肥大、リンパ球の進入及び上皮過形成を示したので、TNBS治療によってT細胞介在性の結腸免疫反応が得られた(データなし、引用文献(27))。既に報告されているように、疾患は、PSAを与えたTNBS治療動物中では明らかではなかった。
微生物叢は、免疫系の発達及び機能に大きな影響を有する(マクファーソン及びハリス、2004年)。無菌動物へのバクテロイデスフラジリスの定着は、免疫細菌共生関係の研究のモデルシステムを示す(マスマニアンら、2005年)。最近の研究は、腸のホメオスタシスの維持の間にTreg産生IL10にとって重要な役割を有することを示したので(ルトソブら、2008年)、B.フラジリスの定着が、Foxp3+Tregの成長及びサイトカイン産生にどのように影響を与えるかを理解することが必要である。
Tregは、IL−10、TGF−β及びIL−35の分泌によって炎症反応を強く抑制する(コリソンら、2007年;メイナードら、2007年)。更には、接触依存性のメカニズムには、パーフォリン及びグランザイムの分泌(ゴンデックら、2005年)、並びに、抗炎症性表面レセプター(GITR及びCTLA−4等)の発現(ヴィグナリら、2008年)によるエフェクターT細胞の細胞溶解が含まれる。
Tregを拡大させるのにPSAのみで十分であるかを決定するべく、従来法で定着させたマウスにPSAを与え、MLN内でのCD4+Foxp3+Tregの割合をモニターした。PSAによって経口的に治療したマウスは、MLN内でCD4+Foxp3+T細胞の増加した割合を示す(図1A)。Treg細胞の主要な機能のうちの1つは、炎症性Tエフェクター細胞の活性化及び増殖を抑制することである。Treg機能は、MLNから精製したCD4+CD25+T細胞と、未処理CD4+CD25−T細胞とを様々な割合で添加することによって決定した。PSA治療動物から単離したTregは、PBS治療コントロール動物と比較してインビトロでT細胞応答を抑制する、相当高い能力を示す(例えば、1:2のTreg:Teff比で、28.5%の増殖細胞対43.0%)ことが見出された(図1F)。これらの知見は、従来法で定着させた動物において、PSAが、増強した抑制能力を有する機能性Foxp3+Tregを誘発することを立証する。
無菌マウスは、数々の発育上及び機能的欠陥を有し、このことは、微生物叢が、腸内免疫応答に大きな影響を及ぼすことを示唆する(4)。無菌マウスの単独感作は、個々の細菌種の生理学的寄与を分析し、細菌変異体の比較定着によって分子機能を割り当てる、理想のモデルシステムを提供する。B.フラジリスの定着がTreg細胞の成長にどのように影響を及ぼすかを更に理解するべく、無菌のC57Bl/6マウスを、(全ての造血細胞を欠損させるべく)致死的に放射線照射し、それらを、Foxp3−GFP動物の骨髄によって再形成した。続いてマウスを、無菌のままにするか、或いは、野生型B.フラジリス又はPSA欠損した株(B.フラジリスΔPSA)を単独感作させた。
多くの微生物生産物は、トール様レセプター(TLR)等のパターン認識レセプターによって感知される。TLRシグナル伝達は、歴史的に見て、炎症を誘発すると考えられていたが、一連の研究は、TLRシグナル伝達が、抗炎症反応も促進することができることを示す(ファンマレンら、2008年に概説される)。PSAは、近年、TLR2シグナル伝達によって、自然免疫細胞からのサイトカインの産生と連動していることを示したが(ワンら、2006)、Treg成長におけるTLR2の役割は未知のままである。PSAがTreg生物学と連動しているメカニズムを理解するべく、TLR2欠損動物を、PSAを用いて経口的に治療し、CD4+Foxp3+T細胞成長について分析した。野生型動物に見られるTreg拡大とは対照的に(図7A)、PSAによって治療したTLR2−/−マウスにおけるCD4+Foxp3+T細胞の割合に差が観察されなかった(図7)。更には、PSAに応答したTregによるIl−10の誘発は、TLR2発現の非存在下では失われる(図7B)。当該知見は、TLR2ノックアウトマウスがFoxp3+Treg細胞を欠損しているという報告と完全に一致している(リウら、2006年;ストミュラーら、2006年)。自然免疫シグナル伝達がTregの系統的分化にどのように寄与するかを完全に理解するには、更なる研究が必要であるが、PSA介在性のTregの成長は、TLR2依存的なメカニズムである。
ほとんど全ての細菌は、パターン認識レセプターのための微生物リガンド(例えば、LPS(エンドドキシン)、ペプチドグリカン、非メチル化CpG等)を共有し、このことは、分子メカニズムが、粘膜免疫系に、共生細菌と病原性細菌とを区別させなければならないことを示唆する。この区別のための現行の理論は、免疫系と微生物叢(免疫学的無視)との空間分離、及び、自然免疫抑制を含む(フーパー、2009年)。微生物の感染を制御すべく、免疫系は、炎症誘発Th17細胞の機能を生じさせる。宿主組織への付随的な損傷を予防するため、Tregは、Thl7免疫を制御し、Tregの機能は、無害の非自己及び自己抗原の双方への免疫反応の抑制のに必要である。更には、共生及び病原性細菌は、パターン認識レセプターのための多くの微生物リガンドを共有し、このことは、分子メカニズムが、免疫系に有益細菌と有害細菌とを区別させなければならないことを示唆する。
PSAの非存在の結果として生ずる宿主炎症反応は、非特異的T細胞活性化を表すか又はB.フラジリスの抗原を対象とするのではないかと考えられている。これらの2つの可能性のあるメカニズムを区別するべく、T細胞によるIL−17産生を、B.フラジリス又はB.フラジリスΔPSA定着動物から種々の共生細菌の抗原まで測定した。抗原提示細胞(APC)を細菌抽出物でパルスし、B.フラジリス又はB.フラジリスΔPSA定着動物から採取した固有層リンパ球によって共培養した。更なる刺激を加えず、抗原特異的応答を正確に測定する。最小のIL−17誘発を、細菌非存在下で検出した(図9A)。
粘膜免疫グロブリンA(IgA)は、定着の間に内臓細菌に対して産生されるので(スラックら、2009年)、PSAもまた抗B.フラジリス抗原産生の発達を妨げているのではないかと考えられている。B.フラジリス特異的なIgAのレベルは、B.フラジリス、B.フラジリスΔPSA又は密接に関連した種であるB.テタイオタオミクロン及びB.バルガトゥスに単独感作させた動物において測定した。無菌、B.テタイオタミクロン又はB.バルガトゥスを単独定着させた動物から単離した結腸の抗原が、B.フラジリス抗原に対して反応性を持たないので、腸内の抗体反応は、非常に特異的である(図4F)。更には、B.フラジリスを単独感作させた動物の腸内IgAは、B.テタイオタミクロン又はB.バルガトゥスからの抗原とは反応しなかった(図11D)。増加したT細胞応答の知見と一致して、B.フラジリスΔPSAを定着させた動物は、PSAを発現するB.フラジリスとは反対に、B.フラジリス特異的なIgAの増加したレベルを示す(図11C)。
単独感作試験は、免疫応答の抗原特異性を決定するのに有益である。該知見は、PSAが、B.フラジリスに対する適応免疫を抑制することを示すが、それらは、1)PSAが、特異的にB.フラジリス抗原への耐性を誘発し、2)PSAが、他の細菌の抗原に対して耐性のある免疫環境を誘発すると解釈することができる。これらの2つの可能性を区別するべく、動物にB.フラジリス及びB.バルガトゥスを共定着させ、同じ微生物叢に存在する両方の微生物に対するIgA応答を測定した。B.フラジリス及びB.バルガトゥスは、同等のレベルで動物に定着する(図12)。B.フラジリス抗原に対する抗体レベルは、共定着の間にPSAによって再度抑制されたが、PSAの存在又は非存在が、B.バルガトゥスに対するIgA反応性には効果がなかった(図13)。無菌又はB.フラジリス単独感作動物から単離した溶解性の結腸内容物は、B.バルガトゥス由来の抗原と反応しないので、抗体応答は特異的である(図13)。定量的フローサイトメトリーに基づく評価を使用して、B.フラジリスΔPSAを定着させた動物が、B.フラジリス表面抗原に対して著しく多いIgAを発生させることが確定された(図12B及び12C)。表面抗原の位相変化のために低いレベルの結合が起こる可能性がある(リウら、2008年)。B.バルガトゥス抗原に対する結合における差異は、野生型又はフラジリスΔPSAの共定着の間には観察されず(図12B,12C及び13)、このことは、PSAが、同じ微生物叢に存在する他の共生細菌の抗原に対する耐性を促進することができないことを実証する。これらの結果は、PSAが、恒常的定着の間に、内臓の一般的な寛容原性免疫環境を誘発しないことを立証する。
Focp3+Tregが適応免疫反応のPSA介在性の抑制のためのメカニズムを提供することを立証すべく、B.フラジリスを定着させた後、CD4+Foxp4+T細胞の特異性を除去して、Th17及びIgAの応答を試験した。Foxp3−DTRマウスは、Foxp3プロモータの制御下、ジフテリアトキシンレセプター(DTR)を発現する。ジフテリアトキシン(DT)によるマウスの治療は、Foxp3+T細胞の除去をもたらし、インビボでのTregの機能分析を可能にする(キムら、2007年)。これまでの知見(図14における)と一致して、Foxp3−DTRによって再形成した、B.フラジリスΔPSAを定着させた無菌動物は、野生型のB.フラジリスを定着させた動物と比較した場合、増加したTh17細胞を、結腸(LP)及びMLNの両方に保持する(図14A及び14B;左のパネル、−DT)。
EDL強化B.フラジリスの極薄の部分は、材料と方法で記載される通りに調製され、透過型電子顕微鏡法によって撮像される。
PSAは、図17A〜17Dに説明する一連の実験において脾臓から精製したCD4+T細胞とともに培養した脾臓細胞又は樹状細胞由来の骨髄(BMDC)と接触させた。結果は、PSAがT細胞上のTLR2シグナル伝達によってIL−10産生を生じさせ得るという結論を裏付ける。
図18A及び18Bに説明する実験セットにおいて、野生型(WT)TLR1−/−、TLR2−/−、TLR6−/−又はCD14−/−動物から単離したT細胞とPSAとを接触させた。結果は、PSAが、(APCの非存在下)T細胞を直接刺激し、IL−10を誘発し得ることを示す。PSAによるIL−10の誘発は、TLR2を必要とするが、TLR1もTLR6も必要としない。TLR2は、ホモ二量体としては作用せず、TLR1及びTLR6とヘテロ二量化することが知られているため、このことは、PSAがTLR2によってIL−10を誘発するように特異的に作用していることを示す。
PSA、TLR1/TLR2リガンドPAM3CysK及びTLR2/6リガンドFSL1を、図19に説明する実験セットにおいてCD4+Foxp3−細胞と接触させた。結果は、PSAが、非Treg細胞を直接刺激してIL−10を産生し得ることを示す。PAM3CysKのような他のTLR2リガンドは、この同じ集団の非Treg細胞からIL−10産生を誘発しないので、非常に独特である。更には、他のTLR2リガンドが、T細胞によってIFN−γ産生を実際に抑制し、T細胞を活性化するPSAの独特の能力を更に示す。
図21に説明する実験セットにおいて、CD4+Fox3T細胞を、TGF−βの存在下、抗CD−3によって刺激し、PSA有り及び無しでインキュベートした。結果は、PSAが直接的に、TregにIL−10の遺伝子発現を誘発させることができることを示す。
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Claims (30)
- a)抗原に対する炎症誘発反応を抑制することのできる当該抗原に特異的な制御性T細胞を発生させる時間及び条件で、T細胞と、前記抗原に結合した両性イオン多糖類とを、又は、
b)抗原に対する炎症誘発反応を抑制することのできる当該抗原に特異的な制御性T細胞を発生させる時間及び条件で、抗原提示細胞と、前記抗原に結合した両性イオン多糖類とを、
接触させることを含む、抗原特異的抗炎症制御性T細胞の発生方法。 - 前記多糖類がPSAである、請求項1に記載の発生方法。
- 前記T細胞が制御性T細胞である、請求項1又は2に記載の発生方法。
- 前記b)について、前記抗原提示細胞が、前記抗原に結合した前記両性イオン多糖類と接触した後に、前記抗原提示細胞と制御性T細胞とを接触させることを更に含む、請求項1〜3のいずれか1項に記載の発生方法。
- 前記b)について、前記制御性T細胞の存在下、前記抗原提示細胞と、前記抗原に結合した前記両性イオン多糖類とを接触させる、請求項1に記載の発生方法。
- 同じ小胞上又は小胞内に前記両性イオン多糖類と前記抗原とを含ませることによって、前記両性イオン多糖類が前記抗原に結合する、請求項1〜5のいずれか1項に記載の発生方法。
- 前記小胞が、OMVである、請求項6に記載の発生方法。
- 前記両性イオン多糖類が、物理的結合によって前記抗原に結合する、請求項1〜7のいずれか1項に記載の発生方法。
- 前記両性イオン多糖類が、直接的又は間接的な共有結合によって、前記抗原に結合する、請求項1に記載の発生方法。
- 前記炎症誘発反応が、細胞介在性炎症反応である、請求項1に記載の発生方法。
- 前記炎症誘発反応が、液性炎症反応である、請求項1に記載の発生方法。
- 前記接触がインビトロで行われる、請求項1に記載の発生方法。
- 前記T細胞が個々の患者から得られる、請求項1〜9のいずれか1項に記載の発生方法。
- 前記発生した抗原特異的抗炎症制御性T細胞を、前記個体に注入し返す、請求項13に記載の発生方法。
- 前記接触がインビボで行われる、請求項1に記載の発生方法。
- 前記接触が、前記抗原に結合した前記両性イオン多糖類の局所又は全身投与によって行われ、個体の内臓において、前記抗原特異的Tregを発生させる、請求項15に記載の発生方法。
- 前記抗原が、リウマチ性関節炎、心筋炎症、硬皮症、I型糖尿病、多発性硬化症、クローン病、潰瘍性大腸炎、シェーグレン症候群、橋本甲状腺炎、グレーブス病、自己免疫性肝炎及び重症筋無力症からなる群より選択される疾患に関連する、請求項1に記載の発生方法。
- 個体において、抗原特異的抗炎症制御性T細胞を誘発する時間及び条件で、特異的な抗原に結合した両性イオン多糖類によって前記個体を治療することを含む、前記個体における抗原特異的炎症の抑制方法。
- 前記多糖類がPSAである、請求項18に記載の抑制方法。
- 同じ小胞上又は小胞内に、前記両性イオン多糖類と前記抗原とを含ませることにより、前記両性イオン多糖類が前記抗原に結合する、請求項18又は19に記載の抑制方法。
- 前記両性イオン多糖類が、物理的結合によって前記抗原に結合する、請求項18に記載の抑制方法。
- 前記両性イオン多糖類が、直接的又は間接的な連結によって前記抗原に結合する、請求項18に記載の抑制方法。
- 前記抗原が、リウマチ性関節炎、心筋炎症、硬皮症、I型糖尿病、多発性硬化症、クローン病、潰瘍性大腸炎、シェーグレン症候群、橋本甲状腺炎、グレーブス病、自己免疫性肝炎及び重症筋無力症からなる群より選択される疾患に関連する、請求項18に記載の抑制方法。
- a)抗原に対する炎症誘発反応を抑制することのできる当該抗原に特異的な制御性T細胞を発生させる時間及び条件で、T細胞と、両性イオン多糖類とを、又は、
b)抗原に対する炎症誘発反応を抑制することのできる、当該抗原に特異的な制御性T細胞を発生させる時間及び条件で、抗原提示細胞と、両性イオン多糖類とを、
接触させることを含む、抗原特異的抗炎症制御性T細胞の発生方法。 - 前記多糖類が、PSAである、請求項24に記載の発生方法。
- 前記両性イオン多糖類が、小胞内又は小胞の細胞表面上に存在する、請求項24又は25に記載の発生方法。
- 前記小胞がOMVである、請求項26に記載の発生方法。
- 前記両性イオン多糖類が、抗原に結合している、請求項24に記載の発生方法。
- 前記接触が、インビトロで行われる、請求項24に記載の発生方法。
- 前記発生した抗原特異的制御性T細胞が、患者に注射される、請求項24に記載の発生方法。
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