JP6789112B2 - Cd4+tリンパ球の検出、調製および枯渇のための向上した方法 - Google Patents
Cd4+tリンパ球の検出、調製および枯渇のための向上した方法 Download PDFInfo
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Description
この発明は、体液または培地での、もしくは体液または培地からのCD4+Tリンパ球の検出、調製または枯渇のための、隣接残基内にチオ酸化還元モチーフを含むクラスII制限主要組織適合性複合体(major histocompatibility complex:MHC)T細胞エピトープを包含する合成ペプチドに関する。
リンパ球は、外来抗原に対する免疫反応の同化において、および疾患の制御において中心的な役割を果たす。リンパ球のそのような動員および活性化は、病原体に対する反応などにおいて有益となる場合があり、または、自己免疫疾患、アレルゲンへの反応によって、および移植片拒絶において例証されるように不利益となる場合がある。したがって、そのようなリンパ球を検出し、列挙し、精製し、または枯渇させることが有利となるであろう状況が、数多くある。しかしながら、これらの目標を達成するための現在の方法は、不十分である。
この発明の第1の局面は、試料においてクラスII制限CD4+T細胞を検出するためのインビトロの方法に関する。これらの方法は、
− 試料を提供するステップと、
− MHCクラスII分子とペプチドとの単離された複合体に試料を接触させるステップとを含み、ペプチドは、抗原タンパク質のMHCクラスII制限T細胞エピトープと、それに直接隣接する、または最大7個のアミノ酸のリンカーによって隔てられた、[CST]−xx−CまたはC−xx−[CST]モチーフを有する配列とを含み、前記方法はさらに、
− 試料における細胞との複合体の結合を測定することによってCD4+T細胞を検出するステップを含み、細胞への複合体の結合は、試料におけるCD4+T細胞の存在を示す。
特定の実施形態では、リンカーは、最大4個のアミノ酸の長さを有する。
試料において検出されるCD4+T細胞は、ナイーブCD4+T細胞、抗原にさらされたCD4+T細胞、Treg、誘発Treg、治療中またはワクチン接種中に得られたCD4+T細胞、または組織内のCD4+T細胞のうちの1つ以上であってもよい。
この発明のさらに別の局面は、抗原タンパク質のMHCクラスII制限T細胞エピトープと、それに直接隣接する、または最大7個のアミノ酸のリンカーによって隔てられた、[CST]−xx−CまたはC−xx−[CST]モチーフを有する配列とを含むペプチドの、MHCクラスII制限CD4+T細胞への、MHCクラスII分子とT細胞エピトープを有するペプチドとの複合体の結合親和性を増加させるための使用に関する。
− 自己免疫疾患の治療を監視するために、自己免疫抗原に対するエフェクターCD4+T細胞を検出すること、
− ワクチン接種の有効性を監視するために、ワクチン特異的CD4+T細胞を検出すること、
− 移植前に被移植者のCD4+T細胞を除去すること、
− CD4+T細胞の集団を濃縮してから、細胞の前記集団を拡張し、オプションで、ペプチドの存在下で細胞を拡張すること、または、
− TCR(T細胞受容体)における突然変異を同定するために、CD4+T細胞を異なる時点で単離すること。
(1) 分析目的:ワクチン接種前のT細胞前駆体の頻度の検出、MHCクラスII複合体についてのペプチド結合親和性の評価、ワクチン接種の経過中または免疫抑制療法下での特異的T細胞のフォローアップ、細胞の同定(細胞の生物活性にかかわらない)、疾患のメカニズムに関わる細胞の同定、特異的T細胞の枯渇、および、臓器生検でのような現場でのT細胞の検出;
(2) 調製目的:機能評価のための特異的T細胞の調製、培養および精製およびTCRシーケンシングのためのT細胞の調製;
(3) たとえば細胞療法を目的とする細胞集団の品質管理;
(4) 臓器移植前の特異的CD4+T細胞の枯渇を含む、治療目的。
特異性および親和性はまた、より多い数およびより高い純度でのCD4+T細胞の単離を可能にする。
定義
ここに使用されるような「ペプチド」という用語は、ペプチド結合によって接続されるアミノ酸配列を含む分子を指すが、ある特定の実施形態では、(たとえば連結有機化合物のような)非アミノ酸構造を含み得る。
「単離され」とは、ペプチドを有するMHCクラスIIタンパク質および複合体を指す場合、溶解物および溶解物の断片を含む、細胞の組み換えプロセスまたは(部分的)精製を介して得られる化合物を指す。
・ 不適切な免疫反応の能動抑制に関わるTreg(制御性T細胞)。これらの細胞は、CD4+、CD25+、FoxP3+細胞である;
・ 不適当な免疫反応の抑制に関わる、Tr1またはTh3 CD4+T細胞などの誘発Treg。前記細胞は、Lag3hiおよびCD49b、細胞内IL−10およびTGFベータ、ならびにグランザイムBなどの表面マーカーの任意の組合せを特徴とする;
・ CD45AおよびCD197を発現し、CD44の低いまたは中間の発現と、好ましい経路がない低いサイトカイン生成とを有する、ナイーブCD4+T細胞;
・ 高いCD44発現と、制限された一組のサイトカインの生成とを有する、極性化CD4+細胞;
・ WO2009/101207において詳細に特徴付けられ、とりわけFoxP3発現がないことを特徴とする、細胞溶解性CD4+T細胞(cCD4+T細胞)。
− http://antigen.i2r.a-star.edu.sg/predBalbc/;
− http://antigen.i2r.a-star.edu.sg/predBalbc/;
− http://www.imtech.res.in/raghava/mhcbn/;
− http://www.syfpeithi.de/home.htm;
− http://www-bs.informatik.uni-tuebingen.de/SVMHC;
− http://bio.dfci.harvard.edu/Tools/antigenic.html;
− http://www.jenner.ac.uk/MHCPred/。
多発性硬化症は、CD4+T細胞が、ミエリンオリゴデンドロサイト糖タンパク質(myelin oligodendrocytic glycoprotein:MOG)などの自己抗原に向けて重要な役割を果たす、慢性脱髄疾患である。脳−血液障壁を通るエフェクター細胞の移動は、脳組織破壊を誘出する。
感染症用のワクチン接種の有効性は、そのようなワクチン接種によって活性化され得るCD4+T細胞の数に依存する。成功したワクチン接種の初期のおよび予測的徴候は、ワクチン特異的CD4+T細胞の数の増加に見出すことができ、それは、たとえばワクチン投与数を増加させることによって、ワクチン接種戦略を修正すべきかどうか決定するための有用なパラメータである。
骨髄拒絶は、被移植者からのCD4+Tリンパ球がドナー骨髄からの同種抗原に対して反応する場合に発生する。このプロセスにはCD4細胞およびCD8細胞が双方とも関わっているが、CD4細胞は、CD8+T細胞を活性化するために必要とされる。したがって、被移植者のCD4+T細胞をなくすことが、移植の成功を可能にするであろう。同種抗原に対して特異的なCD4+T細胞の除去は、そのような細胞の頻度が低いために、高性能の親和性吸着を必要とする。
細胞療法は、ドナーから細胞を単離し、関連する細胞集団をインビトロで精製および拡張し、ドナーに自分自身の細胞を再投与することにある。そのようなアプローチの成功は、細胞を単離するために使用される方法の有効性に大きく依存する。
病気発症についての危険因子のうちの1つは、末梢血において使用可能なT細胞のレパートリーとリンクしている。しかしながら、現在、病気が明白な場合、すなわち、特異的T細胞の十分な拡張がすでに発生している場合に限り、TCRファミリーの使用と病気を発症するより高い危険との関連が同定され、それにより、現在使用可能な方法を使用する検出を可能にする。病気の発症前にそのような細胞を検出することは非常に興味深く、加えて、上述の実施例3で説明されたように、そのような細胞をレパートリーから除去する可能性を提供できるであろう。一例が、インスリンの9−23領域に位置するエピトープを認識する生殖細胞系列構成のT細胞によって提供される(中山ら(2012)、Diabetes 61、857〜865、2012年)。
CGPCSRVVHLYRNGKD(MOG47−58)[SEQ ID NO:1]
SRVVHLYRNGKD(MOG47−58)[SEQ ID NO:2]
CGHCKYVKQNTLKHEMAGG(インフルエンザ血球凝集素)[SEQ ID NO:3]
KYVKQNTLKHEMAGG(インフルエンザ血球凝集素)[SEQ ID NO:4]
CHGCFNSNRANSS(Dby)[SEQ ID NO:5]
FNSNRANSS(Dby)[SEQ ID NO:6]
CRLCKVAPVIKARMM(GAD65 524−543)[SEQ ID NO:7]
KVAPVIKARMM(GAD65 524−543)[SEQ ID NO:8]
CGHCGSHLVEALYLVCGERG(INS9−23)[SEQ ID NO:8]
SHLVEALYLVCGERG(INS9−23)[SEQ ID NO:8]
Claims (22)
- 試料においてクラスII制限CD4+T細胞を検出するためのインビトロの方法であって、
− 試料を提供するステップと、
− 単離されたMHCクラスII分子とペプチドとの複合体に試料を接触させるステップとを含み、前記ペプチドは、抗原タンパク質のMHCクラスII制限T細胞エピトープと、それに直接隣接する、または最大7個のアミノ酸のリンカーによって隔てられた、[CST]−X(2)−CまたはC−X(2)−[CST]モチーフを有する配列とを含み、Xは任意のアミノ酸であり、ここにおいて[CST]−X(2)−CまたはC−X(2)−[CST]モチーフ中のシステインは、前記ペプチドの非エピトープ部分における唯一のシステインであり、前記方法はさらに、
− 前記試料における細胞との前記複合体の結合を測定するステップを含み、細胞への複合体の結合は、前記試料におけるCD4+T細胞の存在を示す、方法。 - モチーフはC−X(2)−Cである、請求項1に記載の方法。
- リンカーは、最大4個のアミノ酸の長さを有する、請求項1に記載の方法。
- 前記MHCクラスII分子と前記ペプチドとの複合体が非共有結合複合体であり、前記ペプチドは12〜20個のアミノ酸の長さを有する、請求項1に記載の方法。
- 複合体は、前記ペプチドとMHCクラスII分子との融合タンパク質である、請求項1に記載の方法。
- 試料は、血液試料、もしくは、関節リウマチ患者からの関節液または感染性肺炎の患者の胸膜液である組織試料である、請求項1に記載の方法。
- CD4+細胞は、Treg、Tr1またはTh3などの誘発Treg、ナイーブCD4+T細胞、極性化CD4+T細胞、および細胞溶解性CD4+T細胞からなる群から選択される1つ以上である、請求項1に記載の方法。
- 試料は、ナイーブCD4+T細胞、抗原にさらされたCD4+T細胞、治療中またはワクチン接種中に得られたCD4+T細胞、組織内のCD4+T細胞のうちの1つ以上を含む試料である、請求項1に記載の方法。
- ペプチドのエピトープ配列は、抗原タンパク質のエピトープ配列と同一である、請求項1に記載の方法。
- CD4+細胞へのエピトープの結合親和性を調整するために、ペプチドのエピトープ配列のMHCクラスII固定残基が、抗原タンパク質のエピトープ配列と比べて修飾される、請求項1に記載の方法。
- 複合体におけるMHC分子は、多量体である、請求項1に記載の方法。
- 複合体は、可溶性複合体であり、もしくは、複合体は、不溶性担体または基質に付着されている、請求項1に記載の方法。
- 前記複合体に結合されているCD4+T細胞を単離するステップをさらに含む、請求項1に記載の方法。
- 検出または単離されたCD4+T細胞の亜集団を検出または単離するステップをさらに含む、請求項1に記載の方法。
- − MHCクラスII分子と、
− ペプチドと、の単離された複合体であって、
前記ペプチドは、抗原タンパク質のMHCクラスII制限T細胞エピトープと、それに直接隣接する、または最大7個のアミノ酸のリンカーによって隔てられた、[CST]−X(2)−CまたはC−X(2)−[CST]モチーフを有する配列とを含み、Xは任意のアミノ酸であり、ここにおいて[CST]−X(2)−CまたはC−X(2)−[CST]モチーフ中のシステインは、前記ペプチドの非エピトープ部分における唯一のシステインである、複合体。 - モチーフはC−X(2)−Cである、請求項15に記載の複合体。
- リンカーは、最大4個のアミノ酸の長さを有する、請求項15に記載の複合体。
- ペプチドとMHC分子との複合体は、非共有結合された複合体であり、または、ペプチドとMHC分子との複合体は、共有結合された複合体である、請求項15に記載の複合体。
- 複合体は、前記ペプチドとのMHCクラスIIタンパク質の融合タンパク質である、請求項15に記載の複合体。
- 融合タンパク質以外の、非共有結合複合体または共有結合複合体における前記ペプチドは、12〜20個のアミノ酸の長さを有する、請求項15に記載の複合体。
- 前記複合体は、担体に付着されている、請求項15に記載の複合体。
- 複合体は、検出可能な標識を含む、請求項15に記載の複合体。
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RU2600798C2 (ru) | 2009-04-01 | 2016-10-27 | Юниверсити Оф Майами | Композиции вакцин и способы их применения |
GB201002730D0 (en) | 2010-02-18 | 2010-04-07 | Uni I Oslo | Product |
US9801927B2 (en) | 2010-03-29 | 2017-10-31 | Centre National De La Recherche Scientifique-Cnrs | Pharmaceutical compositions comprising a polypeptide comprising at least one CXXC motif and heterologous antigens and uses thereof |
WO2011147894A1 (en) | 2010-05-25 | 2011-12-01 | Forschungsverbund Berlin E.V. | Chimeric mhc class ii proteinpeptide |
US10023847B2 (en) | 2010-11-25 | 2018-07-17 | Imnate Sarl | Immunogenic peptides for use in the prevention and/or treatment of infectious diseases, autoimmune diseases, immune responses to allofactors, allergic diseases, tumors, graft rejection and immune responses against viral vectors used for gene therapy or gene vaccination |
GB201201511D0 (en) | 2012-01-30 | 2012-03-14 | Univ Leuven Kath | Modified epitopes for boosting CD4+ T-cell responses |
NZ722352A (en) | 2012-02-15 | 2022-05-27 | Ecole Polytechnique Fed Lausanne Epfl | Erythrocyte-binding therapeutics |
GB201309469D0 (en) | 2013-05-28 | 2013-07-10 | Imcyse Sa | Detection of CD4+ T lymphocytes |
GB201319160D0 (en) | 2013-10-30 | 2013-12-11 | Imcyse Sa | Methods for induction of antigen-specific regulatory t cells |
GB201418433D0 (en) | 2014-10-17 | 2014-12-03 | Imcyse Sa | Novel immunogenic peptides |
US10729791B2 (en) | 2015-05-18 | 2020-08-04 | Imcyse Sa | Animal models for evaluating pharmaceutical compounds |
CN108289941B (zh) | 2015-09-25 | 2022-06-21 | 易姆赛斯股份公司 | 用于消除对治疗剂的免疫应答的改进的方法和化合物 |
CN109069605B (zh) | 2016-04-19 | 2022-11-29 | 易姆赛斯股份公司 | 新免疫原性CD1d结合肽 |
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US11226332B2 (en) | 2022-01-18 |
WO2014191432A1 (en) | 2014-12-04 |
US20200103407A1 (en) | 2020-04-02 |
EP3004137B1 (en) | 2021-03-17 |
JP2016527875A (ja) | 2016-09-15 |
ES2868423T3 (es) | 2021-10-21 |
EP3004137A1 (en) | 2016-04-13 |
GB201309469D0 (en) | 2013-07-10 |
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