JP2018537999A - 樹状細胞組成物 - Google Patents
樹状細胞組成物 Download PDFInfo
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- JP2018537999A JP2018537999A JP2018533086A JP2018533086A JP2018537999A JP 2018537999 A JP2018537999 A JP 2018537999A JP 2018533086 A JP2018533086 A JP 2018533086A JP 2018533086 A JP2018533086 A JP 2018533086A JP 2018537999 A JP2018537999 A JP 2018537999A
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Abstract
Description
− 少なくとも1つの抗原またはその断片、
− 抗原のN末端の前の小胞体(ER)移行シグナル配列、ならびに
− 抗原のC末端の後のエンドソーム/リソソームターゲティング配列を含む膜貫通および細胞質ドメイン
を含む少なくとも1つの融合タンパク質を発現する樹状細胞を含む樹状細胞組成物を企図する。
− 抗原のN末端の前の小胞体(ER)移行シグナル配列、ならびに
− 抗原のC末端の後のエンドソーム/リソソームターゲティング配列を含む膜貫通および細胞質ドメイン
からなる群から選択される少なくとも1つである。
(i)単球の準備、
(ii)IL−4およびGM−CSFとのステップi)の単球のインキュベーション、
(iii)成熟カクテルと組み合わせたIL−4およびGM−CSFとのステップii)の単球のインキュベーション
を含む方法によって生成された成熟樹状細胞である。
− 少なくとも1つの抗原またはその断片、
− 抗原またはその断片のN末端の前の小胞体(ER)移行シグナル配列、ならびに
− 抗原またはその断片のC末端の後のエンドソーム/リソソームターゲティング配列を含む膜貫通および細胞質ドメイン
を含む少なくとも1つの融合タンパク質を発現する樹状細胞を含む樹状細胞組成物を指す。
(i)
− 少なくとも1つの抗原またはその断片、
− 抗原またはその断片のN末端の前の小胞体(ER)移行シグナル配列、ならびに
− 抗原またはその断片のC末端の後のエンドソーム/リソソームターゲティング配列を含む膜貫通および細胞質ドメイン
を含む少なくとも1つの融合タンパク質を発現する樹状細胞、ならびに
(ii)
− 抗原またはその断片のN末端の前の小胞体(ER)移行シグナル配列、ならびに
− 抗原またはその断片のC末端の後のエンドソーム/リソソームターゲティング配列を含む膜貫通および細胞質ドメイン
を有さない少なくとも1つの抗原またはその断片を発現する樹状細胞
を含む樹状細胞組成物を指す。
(i)
− MELAN−A抗原またはその断片、
− MELAN−A抗原またはその断片のN末端の前の小胞体(ER)移行シグナル配列、ならびに
− MELAN−A抗原またはその断片のC末端の後のエンドソーム/リソソームターゲティング配列を含む膜貫通および細胞質ドメイン
を含む少なくとも1つの融合タンパク質を発現する樹状細胞、ならびに
(ii)
− MELAN−A抗原またはその断片のN末端の前の小胞体(ER)移行シグナル配列、ならびに
− MELAN−A抗原またはその断片のC末端の後のエンドソーム/リソソームターゲティング配列を含む膜貫通および細胞質ドメイン
を有さないMELAN−A抗原またはその断片を発現する樹状細胞
を含む樹状細胞組成物を指すことを意味する。
を含む方法によって生成された成熟樹状細胞である。
− 少なくとも1つの抗原またはその断片、
− 抗原またはその断片のN末端の前の小胞体(ER)移行シグナル配列、ならびに
− 抗原またはその断片のC末端の後のエンドソーム/リソソームターゲティング配列を含む膜貫通および細胞質ドメイン
を含む少なくとも1つの融合タンパク質を発現する樹状細胞を含む樹状細胞組成物であって、
融合タンパク質はMELAN−Aである、樹状細胞組成物を指す。
a)
− ヒトER移行シグナル配列、
− エンドソーム/リソソームターゲティング配列を含むヒト膜貫通および細胞質ドメイン、ならびに
− 少なくとも1つの抗原またはその断片
を含む発現ベクター、ならびに
b)少なくとも1つの抗原またはその断片を含むが、エンドソーム/リソソームターゲティング配列を含むER移行シグナル配列ならびにヒト膜貫通および細胞質ドメインを欠いている発現ベクター
を含む組成物に関する。
a)
− ヒトER移行シグナル配列、
− エンドソーム/リソソームターゲティング配列を含むヒト膜貫通および細胞質ドメイン、ならびに
− 少なくとも1つの抗原またはその断片
を含む発現ベクター、ならびに
b)少なくとも1つの抗原またはその断片を含むが、ER移行シグナル配列ならびにエンドソーム/リソソームターゲティング配列を含むヒト膜貫通および細胞質ドメインを欠いている発現ベクター
を含むキットに関する。
in vivoで本発明者らのDCワクチン接種を研究するためのヒト化マウスモデルを開発するために、本発明者らは、ヒトPBMCを異種移植したNOD−scid/Il2rγ−/−(NSG)マウスを使用した。NSGマウスは免疫不全(NK、TおよびB細胞を欠いている)であるので(SPRANGER, S. et al. 2012. NOD/scid IL-2Rg(null) mice: a preclinical model system to evaluate human dendritic cell-based vaccine strategies in vivo. J Transl Med, 10, 30.)、免疫細胞集団における得られたニッチはヒトPBMCとの非常に有効な生着を可能にする(SHULTZ, et al. 2007. Humanized mice in translational biomedical research. Nat Rev Immunol, 7, 118-30.)。
健常なHLA−A*02:01ドナーに由来する単球を単離し、in vitroで3日以内にSprangerら(2010. Generation of Th1-polarizing dendritic cells using the TLR7/8 agonist CL075. J Immunol, 185, 738-47)に記載されているように成熟化した。in vivoでのヒト化マウスへの後の投与のための樹状細胞のin vitroでの成熟化を検証するために、本発明者らは、FACS分析によって典型的に未成熟樹状細胞および成熟樹状細胞上で発現される細胞表面分子の発現を決定した(Burdek et al. 2010. Three-day dendritic cells for vaccine development: antigen uptake, processing and presentation. J Transl Med, 8, 90)。分析した樹状細胞は成熟表現型を発現した(図2A)。成熟樹状細胞に、成熟3d樹状細胞についてのエレクトロポレーション条件に従ってCrossTAg−Melan−A−または従来のMelan−A−ivt−RNAのいずれかをトランスフェクトした(Burdek et al., 2010)。トランスフェクション効率を、モノクローナル抗体によるMelan−Aタンパク質の細胞内染色によって調べた(エレクトロポレーションの6時間後)(図2B)。
再構成したマウスに、1週間間隔で2回ワクチン接種し、その後、脾臓細胞を単離し、分析した。異なるDCワクチンの誘発効率を比較するために、Melan−A特異的CD8+T細胞の数を、Melan−A−エピトープを負荷した蛍光標識化HLA−A*02:01多量体によって検出した(図3A)。脾臓細胞のex vivo分析により、従来のDC群と比較してCrossTAg−DC群または混合した群において、より多くの数のMelan−A特異的CD8+T細胞が既に明らかになり、これにより、対照群と比較してわずかに多くの数の特異的細胞のみが示された。さらに、本発明者らは、従来の群と比較してCrossTAg群において顕著に高いパーセンテージのCD8+T細胞を検出した(図3B)。続いて、残存脾細胞を、Melan−Aトランスフェクト樹状細胞およびhIL−2によってin vitroでさらに増殖させ、一方、対照群はhIL−2により処理しただけであった。増殖させた細胞の再分析により、Melan−A特異的CD8+T細胞の平均数に関してCrossTAg−Melan−A含有樹状細胞と従来のMelan−A樹状細胞との間のさらにより明らかな相違が実証された。顕著に多くの数のMelan−A特異的CD8+T細胞を、従来の群と比較してCrossTAg群において見ることができる(図3C)。このように、CrossTAg−Melan−A−ivt−RNAを負荷した樹状細胞によるワクチン接種により、Melan−A特異的CD8+T細胞のより多くの増殖によって実証される、優れた誘発能力が生じた。さらにより強力な誘発能力は、CrossTAg−Melan−A−ivt−RNAを負荷した樹状細胞およびCrossTAgと融合していないMelan−A−ivt RNAを負荷した樹状細胞の組合せによるワクチン接種に対して実証される。
本発明者らは、標的抗原に隣接しているCrossTAg配列を含んでいるRNA構築物の明確な利点を示すCrossTAgトランスフェクト樹状細胞によって抗原特異的CD8+T細胞の優れた誘発効率を実証した。CD8+T細胞記憶の樹立および首尾良い腫瘍退縮に関して、CD4+T細胞の極めて重要な役割が以前に示されている(Mortenson, et al. 2013. Effective anti-neu-initiated antitumor responses require the complex role of CD4+ T cells. Clin Cancer Res, 19, 1476-86; Rosenberg et al. Cancer immunotherapy: moving beyond current vaccines. Nat Med, 10, 909-15)。このように、CrossTAg−Melan−A含有樹状細胞をワクチン接種したNSGマウスにおいて誘発される増強した免疫応答は、MHC−Iおよび−II上でMelan−A提示を引き起こすCrossTAg配列によって提供される使用可能なCD4+T細胞の援助によって説明することができる。
遺伝的構築物
pGEM−eGFP−A120ベクターを、CrossTAgベクターについての開始構築物として使用した。元のpGEMベクターのこのポリA120バリアントは転写RNAをより高い安定性にし、改善されたタンパク質発現を導いた。プラスミドは、eGFP cDNAの5’末端において特有のAgeI部位、および3’末端において特有のEcoRI部位をさらに含有した。ポリ−A尾部の後にSpeI部位が続き、これはivt−RNA産生のためのプラスミドの線状化を可能にする。
SpeI線状化後、pGEMプラスミドを、製造業者の指示書に従って、mMESSAGE mMACHINE T7キット(ThermoFisher Scientific、Massachusetts、USA)を使用して単一種のin vitro転写(ivt)−RNA産生のための鋳型として使用した。品質管理のために、ivt−RNA産物の長さをアガロースゲル電気泳動によって分析した。濃度および純度をNanodrop ND−1000分光光度計(ThermoFisher Scientific、Massachusetts)によって決定した。
単球由来3d成熟樹状細胞を、Burdekら(Journal of Translational Medicine 2010, 8:90.)に記載されているように生成し、トランスフェクトした。成熟樹状細胞:ミニエプスタイン・バール・ウイルス(Mini-Epstein-Barr virus)(EBV)形質転換リンパ芽球様細胞系(mLCL)のRNAトランスフェクションをエレクトロポレーションによって達成した。
樹状細胞によって発現された表面マーカーを以下の抗体により検出した:PEがコンジュゲートしたCCR7特異的抗体(3D12)(eBioscience、Frankfurt、Germany)、Hz450がコンジュゲートしたCD4特異的抗体(RPA−T4)、Hz500がコンジュゲートしたCD8特異的抗体(RPA−T8)、FITCがコンジュゲートしたCD14特異的抗体(M5E2)、PEがコンジュゲートしたCD40特異的抗体(5C3)、PEがコンジュゲートしたCD40L特異的抗体(TRAP1)、PEがコンジュゲートしたCD80特異的抗体(L307.4)、FITCがコンジュゲートしたCD83特異的抗体(HB15e)、FITCがコンジュゲートしたCD86特異的抗体(2331)、APCがコンジュゲートしたCD137特異的抗体(4B4−1)、FITCがコンジュゲートしたDC−SIGN特異的抗体(DCN46)、PEがコンジュゲートしたHLA−DR特異的抗体(G46−6)(全てBD Biosciences、Heidelberg、Germany製)。洗浄後、細胞を4℃にて30分間染色し、ヨウ化プロピジウム(propidium iodid)(2μg/ml)を、死細胞を除去するために加えた。全ての表面マーカーの発現をフローサイトメトリーによって分析した(LSRII、BD)。獲得後、FlowJo8ソフトウェア(TreeStar)を使用してデータ分析を行った。T細胞上でのCD40L表面発現の分析を、2μg/mlのαCD40抗体(M.Frentsch、Berlin−Brandenburg Center for Regenerative Therapiesによって提供されたクローンG28.5)を使用して記載されるように実施し(Frentsch, M. et al. (2005) Direct access to CD4+ T cells specific for defined antigens according to CD154 expression. Nat Med 11(10): 1118-1124)、T細胞:APC共培養の開始から6時間後に評価した。
健常ドナーの3d成熟樹状細胞に、MELAN−AをコードするCrossTAg−RNAをトランスフェクトした。エレクトロポレーション後、トランスフェクト成熟樹状細胞を採取し、この混合物の混合した成熟樹状細胞を、1:2の比の範囲内で末梢血リンパ球(PBL)と共培養し、それは成熟樹状細胞生成のプロセスにおいてPBMCのプラスチック接着の間、非接着性であった。細胞を加湿雰囲気において37℃にて培養した。インターロイキン−2(IL−2、20U/ml;Chiron Behring、Marburg、ドイツ)および5ngのIL−7/ml(Promokine、Heidelberg、ドイツ)を1日後に加え、次いで1日おきに加えた。
活性化誘発性サイトカイン分泌を測定するために、5*104個のT細胞を、加湿雰囲気において37℃にて、丸底96ウェルプレート内の200μlのT細胞培地中で1*105個のivt−RNAが負荷された抗原提示細胞と共培養した。偽トランスフェクトAPCを有するか、または刺激細胞を有さないT細胞を陰性対照として使用した。16時間の共培養後、上清を採取し、OptEIAヒトIFN−γまたはGM−CSF Set(両方BD Biosciences製、Heidelberg、ドイツ)を使用して酵素結合免疫吸着測定法(ELISA)によって評価した。
Claims (29)
- − 少なくとも1つの抗原またはその断片、
− 前記抗原のN末端の前の小胞体(ER)移行シグナル配列、ならびに
− 前記抗原のC末端の後のエンドソーム/リソソームターゲティング配列を含む膜貫通および細胞質ドメイン
を含む少なくとも1つの融合タンパク質を発現する樹状細胞を含む樹状細胞組成物。 - 少なくとも1つの抗原またはその断片を発現する樹状細胞をさらに含み、前記抗原が、前記抗原またはその断片のMHCII提示を促進するターゲティングシグナル配列と融合していない、請求項1に記載の樹状細胞組成物。
- 前記MHCII提示を促進する前記ターゲティングシグナル配列が、
− 前記抗原のN末端の前の小胞体(ER)移行シグナル配列、ならびに
− 前記抗原のC末端の後のエンドソーム/リソソームターゲティング配列を含む膜貫通および細胞質ドメイン
からなる群から選択される少なくとも1つである、請求項1または2に記載の樹状細胞組成物。 - 前記融合タンパク質および前記抗原が、一過性または安定に発現され、好ましくは安定に発現される、請求項1から3のいずれか一項に記載の樹状細胞組成物。
- 前記一過性発現が、ivt−RNAを導入することによって実施される、請求項4に記載の樹状細胞組成物。
- 前記エンドソーム/リソソームターゲティング配列がDC−LAMPに由来する、請求項1から5のいずれか一項に記載の樹状細胞組成物。
- 前記エンドソーム/リソソームターゲティング配列がヒトである、請求項1から6のいずれか一項に記載の樹状細胞組成物。
- 前記エンドソーム/リソソームターゲティング配列が、配列番号3の配列またはその断片を含む、請求項1から7のいずれか一項に記載の樹状細胞組成物。
- 前記エンドソーム/リソソームターゲティング配列が、配列番号14の配列またはその断片を含む、請求項1から8のいずれか一項に記載の樹状細胞組成物。
- 前記ER移行シグナル配列が、エンドソーム/リソソーム関連タンパク質に由来する、請求項1から9のいずれか一項に記載の樹状細胞組成物。
- 前記エンドソーム/リソソーム関連タンパク質が、LAMP1、LAMP2、DC−LAP、CD68およびCD1bを含む群から選択される、請求項10に記載の樹状細胞組成物。
- 前記ER移行シグナル配列がLAMP1に由来する、請求項1から11のいずれか一項に記載の樹状細胞組成物。
- 前記ER移行シグナル配列が、配列番号1の配列またはその断片を含む、請求項1から12のいずれか一項に記載の樹状細胞組成物。
- 前記樹状細胞が、以下のステップ:
(i)単球の準備、
(ii)IL−4およびGM−CSFとのステップi)の前記単球のインキュベーション、
(iii)成熟カクテルと組み合わせたIL−4およびGM−CSFとのステップii)の前記単球のインキュベーション
を含む方法によって生成された成熟樹状細胞である、請求項1から13のいずれか一項に記載の樹状細胞組成物。 - 前記成熟カクテルが、IFN−γ、TLR7/8アゴニスト、PGE2および任意選択でTLR3アゴニストの組合せを含む、請求項14に記載の樹状細胞組成物。
- 前記成熟カクテルが、IL−β、TNF−α、IFN−γ、TLR7/8アゴニスト、PGE2およびTLR3アゴニストの組合せを含む、請求項15に記載の樹状細胞組成物。
- ステップii)のインキュベーションが、少なくとも2日継続する、請求項14から16に記載の樹状細胞組成物。
- ステップiii)のインキュベーションが、少なくとも12時間、好ましくは24時間継続する、請求項14から17に記載の樹状細胞組成物。
- 前記TLR7/8アゴニストがR848であり、前記TLR3アゴニストがポリ(I:C)である、請求項15から18に記載の樹状細胞組成物。
- 前記抗原がMELAN−Aである、請求項1から19のいずれか一項に記載の樹状細胞組成物。
- 請求項1から20のいずれかに記載の樹状細胞組成物を含む樹状細胞ワクチン。
- 前記樹状細胞が自己細胞である、請求項21に記載の樹状細胞ワクチン。
- 薬学的に許容される流体組成物である、請求項22に記載の樹状細胞ワクチン。
- 医薬として使用するための、請求項1から20に記載の樹状細胞組成物または請求項21から23に記載の樹状細胞ワクチン。
- がんの治療に使用するための、請求項1から20に記載の樹状細胞組成物または請求項21から23に記載の樹状細胞ワクチン。
- 黒色腫関連抗原に対する免疫応答を刺激する際に使用するための、請求項1から20に記載の樹状細胞組成物または請求項21から23に記載の樹状細胞ワクチン。
- 前記黒色腫関連抗原がMELAN−Aである、請求項26に記載の使用のための樹状細胞組成物または樹状細胞ワクチン。
- a)
− ヒトER移行シグナル配列、
− エンドソーム/リソソームターゲティング配列を含むヒト膜貫通および細胞質ドメイン、ならびに
− 少なくとも1つの抗原またはその断片
を含む発現ベクター、ならびに
b)少なくとも1つの抗原またはその断片を含むが、ER移行シグナル配列ならびにエンドソーム/リソソームターゲティング配列を含むヒト膜貫通および細胞質ドメインを欠いている発現ベクター
を含む組成物。 - a)
− ヒトER移行シグナル配列、
− エンドソーム/リソソームターゲティング配列を含むヒト膜貫通および細胞質ドメイン、ならびに
− 少なくとも1つの抗原またはその断片
を含む発現ベクター、ならびに
b)少なくとも1つの抗原またはその断片を含むが、ER移行シグナル配列ならびにエンドソーム/リソソームターゲティング配列を含むヒト膜貫通および細胞質ドメインを欠いている発現ベクター
を含むキット。
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JP6568239B2 (ja) | 2015-06-01 | 2019-08-28 | メディジーン イミュノテラピーズ ゲーエムベーハー | T細胞受容体ライブラリ |
JP6676759B2 (ja) | 2015-12-23 | 2020-04-08 | メディジーン イミュノテラピーズ ゲーエムベーハー | 抗原特異的tcrの新規生成 |
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