JP5299942B2 - HLA−A2陽性者用glypican−3(GPC3)由来癌拒絶抗原ペプチド及びこれを含む医薬 - Google Patents
HLA−A2陽性者用glypican−3(GPC3)由来癌拒絶抗原ペプチド及びこれを含む医薬 Download PDFInfo
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- C07K7/04—Linear peptides containing only normal peptide links
- C07K7/06—Linear peptides containing only normal peptide links having 5 to 11 amino acids
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- C07K14/46—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates
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- C07K14/4701—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals not used
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Description
(1) 以下の何れかのペプチド。
(A)配列番号1から3の何れかに示すアミノ酸配列からなるペプチド。
(B)配列番号1から3の何れかに示すアミノ酸配列において1個または2個のアミノ酸が置換又は付加されたアミノ酸配列からなり、キラーT細胞の誘導能を有するペプチド。
(3) (1)に記載のペプチドを少なくとも1種類以上含む、腫瘍の治療及び/または予防のための医薬。
(4) (1)に記載のペプチドを含む、腫瘍反応性T細胞の誘導能の高い抗原提示細胞を誘導するための薬剤。
(A)配列番号1から3の何れかに示すアミノ酸配列からなるペプチド。
(B)配列番号1から3の何れかに示すアミノ酸配列において1個または2個のアミノ酸が置換又は付加されたアミノ酸配列からなり、キラーT細胞の誘導能を有するペプチド。
(7) (1)に記載のペプチドに対する抗体。
(8) (1)に記載のペプチドを用いて誘導される、ヘルパーT細胞、キラーT細胞、又はこれらを含む免疫細胞集団。
(10) (4)または(5)に記載の薬剤によって誘導される、(9)に記載の抗原提示細胞。
本発明のペプチドは以下の何れかのペプチドである。
(A)配列番号1から3の何れかに示すアミノ酸配列からなるペプチド。
(B)配列番号1から3の何れかに示すアミノ酸配列において1個または2個のアミノ酸が置換又は付加されており、キラーT細胞の誘導能を有するペプチド。
本発明は、上記した本発明のペプチドの一部もしくは全部をエピトープ(抗原)として認識する抗体、ならびに当該蛋白質又はペプチドを用いてインビトロ刺激により誘導されたキラーT細胞にも関する。一般的には、キラーT細胞のほうが抗体よりも強い抗腫瘍活性を示す。
本発明はまた、本発明のペプチドを用いてインビトロ刺激により誘導されたヘルパーT細胞、キラーT細胞、又はこれらを含む免疫細胞集団に関する。例えば、末梢血リンパ球や腫瘍浸潤リンパ球を本発明のペプチドを用いて、インビトロで刺激すると腫瘍反応性活性化T細胞が誘導され、この活性化されたT細胞は養子免疫療法に有効に用いることができる。また本発明のペプチドを強力な抗原提示細胞である樹状細胞にインビボあるいはインビトロで発現させて、その抗原発現樹状細胞投与により免疫誘導を行うことができる。
本発明のペプチドは、癌細胞特異的キラーT細胞を誘導することができるので、癌の治療、予防剤として期待できる。例えば、本発明のペプチドをコードする遺伝子を適当なベクターに組み込み、この組換えDNAで形質転換されたBCG菌の細菌、または本発明のペプチドをコードするDNAをゲノムに組み込まれたワクシニアウイルス等のウイルスは、ヒト癌の治療・予防用生ワクチンとして有効に利用できる。なお、癌ワクチンの投与量及び投与法は通常の種痘やBCGワクチンと同様である。
(1)HLA-A2に結合性を示すGPC3ペプチドの選択
ヒトGPC3のアミノ酸配列をBIMAS system により検索して、HLA-A2との推定された結合力(binding affinity) が20以上のものを4種類、選択した。
HLA-A2結合性GPC3ペプチドによるヒト・キラーT細胞の誘導
(1)採血
熊本大学医学部消化器外科および国立がんセンター東病院にて治療中の、HLA-A2が陽性の肝細胞癌患者からインフォームドコンセントを得た後、血液サンプル30mlを得て、先に報告した方法により( Nakatsura, Tら、Eur.J.Immunol.32,826-836(2002))、Ficoll-Conray密度勾配遠心法を利用して末梢血単核細胞を単離した。
単離した末梢血単核細胞から、先に報告した方法(Monji,MらClin Cancer Res10,6047-6057,2004)を用いてキラーT細胞を誘導した。まずMACSを用いて末梢血単核細胞中のCD8陽性細胞とCD14陽性細胞を分離し、CD14陽性細胞をGM-CSF(100ng/ml)とIL-4(20ng/ml)存在下に5日間培養して樹状細胞を分化誘導した後に、TNF-α(20ng/ml)を添加して成熟させ、7日目に各GPC3ペプチドを添加(10μM)し、CD8陽性細胞と共培養した。この自己CD14陽性細胞由来の樹状細胞による抗原刺激を1週毎に3〜4回繰り返し、ペプチド特異的キラーT細胞を誘導した。誘導中メディウムは2日毎に半分交換し、IL-2を10U/mlの濃度で添加した。
これらの誘導したキラーT細胞の中に、確かにGPC3に特異的に反応してIFN-γを産生するものが存在するかどうかをELISPOT法にて検出した。IFN-γの検出は、ELISPOT Human IFN-γ ELISPOT set (BD社)を用いて行った。刺激細胞(ターゲット)に対して、キラーT細胞(エフェクター)が反応してIFN-γを産生すると、それぞれが赤いスポットとして検出される。標的細胞として、HLA-A2陽性でGPC3を発現していない親株のSK-Hep-1細胞と、GPC3を発現するように遺伝子導入されたSK-Hep-1/GPC3細胞を用いた。まず、抗ヒト IFN-γ抗体をELISPOTプレート(BD Bioscience社)に18時間コーティングした。その後、10%FCS/RPMIにて2時間ブロッキングを行った。エフェクター細胞(100μL /well)と標的細胞(100μL /well)を混合し、37℃で22時間培養した。エフェクター/ターゲット比(E/T比)は、5:1で実験を行なった。その後、プレートを滅菌水で洗浄し、ビオチン化抗ヒトIFN-γ抗体と2時間、さらにストレプトアビジン-HRPと1時間反応させ、基質溶液にてIFN-γ陽性のスポットを検出した。スポットのカウントは、MINERVA TECH社の自動解析ソフトを用いて行った。この結果、GPC3 44-52、144-152、155-163ペプチドで誘導したキラーT細胞においてGPC3特異的キラーT細胞活性に差を認めたが、GPC3 169-177ペプチドで誘導したキラーT細胞においてはGPC3特異的キラーT細胞活性に差を認めなかった(図1及び図2)。代表的なGPC3 155-163ペプチドで誘導したキラーT細胞の解析結果を図1に示す。
誘導したキラーT細胞の細胞傷害活性は、HLA-A2陽性でGPC3を発現していない親株のSK-Hep-1細胞と、GPC3を発現するように遺伝子導入されたSK-Hep-1/GPC3細胞を刺激細胞として、細胞傷害性試験により検討した。キラーT細胞の細胞傷害活性は、テラスキャンVPによる細胞傷害性試験により評価した。まず、標的細胞を37℃で、30分間カルセインAM染色液にて蛍光標識した。これらの細胞をCoster96穴ハーフ・エリアプレート上でキラーT細胞と共培養し、経時的に蛍光発色細胞を検出することにより細胞傷害の程度を測定した。解析は、MINERVA TECH社の蛍光法による細胞傷害試験計算処理ソフトCalCt-961にて行った。E/T比は、20:1で実験を行なった。この結果、GPC3 44-52、144-152、155-163ペプチドで誘導したキラーT細胞においてGPC3特異的な細胞傷害活性を認めたが、GPC3 169-177ペプチドで誘導したキラーT細胞については、GPC3特異的な細胞傷害活性を認めなかった(図2)。
Claims (8)
- 以下の何れかのペプチド。
(A)配列番号1から3の何れかに示すアミノ酸配列からなるペプチド。
(B)配列番号1から3の何れかに示すアミノ酸配列において1個のアミノ酸が置換されたアミノ酸配列からなり、細胞傷害性(キラー)T細胞の誘導能を有するペプチド。 - 請求項1に記載のペプチドを少なくとも1種類以上含む、癌に対する免疫誘導剤。
- 請求項1に記載のペプチドを少なくとも1種類以上含む、腫瘍の治療及び/または予防のための医薬。
- 請求項1に記載のペプチドを含む、腫瘍反応性T細胞の誘導能の高い抗原提示細胞を誘導するための薬剤。
- 請求項1に記載のペプチドを含む、腫瘍反応性T細胞を誘導するための薬剤。
- 請求項1に記載のペプチドを用いて誘導される、キラーT細胞。
- HLA-A2分子と請求項1に記載のペプチドとの複合体を提示する樹状細胞。
- 請求項4に記載の薬剤によって誘導される、請求項7に記載の樹状細胞。
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US20130217122A1 (en) * | 2012-02-21 | 2013-08-22 | The Trustees Of The University Of Pennsylvania | Expansion of Interferon-Gamma-Producing T-Cells Using Glypican-3 Peptide Library |
US20150359864A1 (en) | 2012-03-09 | 2015-12-17 | Oncotherapy Science, Inc. | Pharmaceutical composition containing peptides |
JP2015533473A (ja) * | 2012-07-12 | 2015-11-26 | ペルシミューン,インコーポレイテッド | 個別のがんワクチン及び適応免疫細胞療法 |
DE20196219T1 (de) * | 2014-09-26 | 2021-10-28 | Baylor College Of Medicine | Glypican-3-Spezifische Chimäre Antigenrezeptoren für adoptive Immuntherapie |
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EP1923463A4 (en) | 2009-09-09 |
WO2007018199A1 (ja) | 2007-02-15 |
JPWO2007018199A1 (ja) | 2009-02-19 |
CN104877008A (zh) | 2015-09-02 |
KR101304243B1 (ko) | 2013-09-05 |
EP1923463B1 (en) | 2011-10-05 |
CN101313063B (zh) | 2013-04-03 |
EP1923463A1 (en) | 2008-05-21 |
CN101313063A (zh) | 2008-11-26 |
RU2008109015A (ru) | 2009-09-20 |
PT1923463E (pt) | 2011-11-24 |
BRPI0614590A2 (pt) | 2013-05-14 |
US8053556B2 (en) | 2011-11-08 |
CN104877008B (zh) | 2018-06-05 |
US20090239806A1 (en) | 2009-09-24 |
IL189389A0 (en) | 2008-06-05 |
US8535942B2 (en) | 2013-09-17 |
HK1118079A1 (en) | 2009-01-30 |
US20120040452A1 (en) | 2012-02-16 |
RU2395519C2 (ru) | 2010-07-27 |
KR20080056153A (ko) | 2008-06-20 |
CN103242428B (zh) | 2015-04-15 |
CA2619443A1 (en) | 2007-02-15 |
CN103242428A (zh) | 2013-08-14 |
CA2619443C (en) | 2014-07-08 |
AU2006277295B2 (en) | 2011-08-11 |
ES2373055T3 (es) | 2012-01-31 |
AU2006277295A1 (en) | 2007-02-15 |
PL1923463T3 (pl) | 2012-02-29 |
IL189389A (en) | 2011-11-30 |
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