JP6831836B2 - 癌治療のための抗−サバイビン抗体 - Google Patents
癌治療のための抗−サバイビン抗体 Download PDFInfo
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- JP6831836B2 JP6831836B2 JP2018511627A JP2018511627A JP6831836B2 JP 6831836 B2 JP6831836 B2 JP 6831836B2 JP 2018511627 A JP2018511627 A JP 2018511627A JP 2018511627 A JP2018511627 A JP 2018511627A JP 6831836 B2 JP6831836 B2 JP 6831836B2
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Description
単一の又は異なるヒト免疫グロブリンのCDRを全て含む抗体である。このように、一つのヒト抗体のフレームワークを、異なるヒト抗体由来のCDRを含ませるために操作することができる。ヒト抗体を製造する方法は、当該分野で既知である(例えば「Mancini et al., 2004, New Microbiol. 27:315-28; Conrad」及び 「Scheller, 2005, Comb. Chem. High Throughput Screen. 8:117-26」などを参照)。
GL261マウスグリオーマ細胞株とB16f1マウスメラノーマ細胞株を、100mm組織培養プレート上で、10%ウシ胎児血清、5000単位ペニシリン/ストレプトマイシン、50μMの2-メルカプトエタノール、25mMのHEPES、及び1×非必須アミノ酸を含む完全ダルベッコ変法イーグル培地(DMEM)にて、37℃にて5%CO2で、1週間に2〜3回培地を交換しながら、成長させた。
ペプチド合成は、Fmoc化学と固相支持樹脂(Genscript, Piscataway, NJ)を使用して行った。各ペプチドは、使用するまで−20℃で貯蔵され、DMSOで希釈された。抗原配列1:DLAQMFFCFKELEGW(配列番号4);抗原配列2:DLAQCFFCFKELEGW(配列番号27);免疫原:ペプチド(Lot:614429-1)-KLHコンジュゲート
10匹のマウスを、抗体産生のラウンドごとに使用した。5匹のBalb/cマウスと5匹のC57Bl/6マウスを、抗原1(SVN53-67/M57)に対して反応性の抗血清を産生するために使用した。マウスを免疫源:ペプチド-KLHコンジュゲート(SVN53-67/M57-KLH)で免疫化した。血清サンプルは、4ラウンドの免疫化後に得た。間接ELISA分析によりサバイビン反応性抗血清を確認した上で、陽性試験マウスを、ハイブリドーマ産生のために選択した。SP2/0骨髄腫細胞に融合させた各反応性マウス由来の細胞を用いて、複数のハイブリドーマ細胞株を産生した。これらの細胞株のうち2つのサブクローンを、さらに単離して特性評価した。
96ウェルELISAプレートを、被覆抗原A:(SVN53-67/M57)DLAQMFFCFKELEGW(配列番号4)又は被覆抗原B:(野生型SVN53-67)DLAQCFFCFKELEGW(配列番号27) を含むリン酸緩衝食塩水(pH 7.4)で被覆した(1μg/mL、100μL/ウェル)。マウスの抗血清又はハイブリドーマ細胞培養上清を、被覆プレートに、100ul/ウェル適用し、インキュベートした。二次抗体:ペルオキシダーゼ-AffiniPureヤギ抗-マウスIgG、Fcγをその後添加し、標準的な検出を行った。
TRIzol(登録商標)試薬(Ambion, Cat. No.:15596-026)の技術マニュアルに従って、ハイブリドーマ細胞から全RNAを単離した。アガロースゲル電気泳動によって全RNAを分析した。アイソタイプ特異的アンチセンスプライマー、又はPrimeScriptTM 1st Strand cDNA合成キット(Takara, Cat. No.:6110A)の技術マニュアルによる一般的なプライマーを使用して、全RNAをcDNAに逆転写した。VHとVLの抗体フラグメントは、GenScriptのRACEの標準的な操作手順に従って増幅した。増幅した抗体フラグメントを別々に、標準的な分子クローニング手順を使用して、標準クローニングベクターにクローニングした。正確なサイズのインサートを有するクローンを特定するために、コロニーPCRスクリーニングを行った。正確なサイズのインサートを有する5つ以上の単一コロニーを、各抗体フラグメントのために配列決定した。正確なVH及びVLインサートサイズを有する5つの単一コロニーを、配列決定に回した。5つの異なるクローンのVH及びVL遺伝子はほぼ同一であった。コンセンサス配列は、産生された抗体の配列であると考えられる。
患者血清を採取し−80℃で貯蔵した。澄んだ血清の連続希釈物を、プレコートELISAプレート(Flat Bottom, Nunc)上の未コンジュゲート・サバイビンペプチド、遊離KLH、及びランダムペプチド(20μg/mL、1μg/ウェル)に、三つ組で適用した。サンプルを4℃で一晩インキュベートし、洗浄した(PBS、1%BSA)。HRPコンジュゲート抗-ヒトIgG検出抗体(Bio-Rad)を、25℃にて1時間添加した。プレートを4回洗浄し、TMB比色溶液(Biolegend)を室温で添加し、15分間発色させ、Bio-Rad自動プレートリーダーで読み取った(450nm)。
マウスにおける概念の検証研究は、100μLの抗-SVN53-67/M57ハイブリドーマ上清又は10μgの精製モノクローナル抗体を用いて行った。マウスに対して、まず、マウスGL261グリオーマ細胞又はB16f1マウスメラノーマ細胞を、頭蓋内か皮下のどちらかに移植した。腫瘍移植後4日目に、マウスに、週に1回、最大で5週間、抗体の腹腔内注射を繰り返し行い、腫瘍の増殖を追跡した。
オスのC57BL/6マウス(Charles River, Horsham, PA)を、イソフルランガスで麻酔し、定位固定ヘッドフレーム(David Kopf Instruments, Tujunga, CA)で固定した。正中頭皮に切り込みを作り、ブレグマを特定した。深部前頭白質内に細胞を移植するために、定位座標を測定した(ブレグマに対して、2.0 mm側方で、1.2 mm前方)。この位置に穿頭孔を開け、2.5μLのDMEMに懸濁させた 1×105のGL261細胞を、固定された25ゲージ針を有するハミルトンシリンジによって、硬膜に対して3.0 mmの深さに注射した。注射は、1μL/分で行われた。針を引き抜き、切り込みを縫合した。カプラン・マイヤー生存プロットを描き、生存期間中央値を、全グループについて決定した。1グループあたりn=8マウス
2×107のGl261細胞又は1×106のB16f1細胞を100μLのPBSに懸濁させた液を、オスのC57Bl/6(免疫正常)マウス(Charles River, Horsham, PA)、及びヌード(免疫不全)NCr-nu/nuマウス(Charles River, Horsham, PA)の剪毛した右側腹部皮下に注射した。腫瘍増殖は毎日ノギスで測定し、体積は式 V=(a・(b2))/2によって算出した(式中、Vは体積であり、aとbは腫瘍の垂直径である)。データは、経時的な腫瘍増殖及び比較平均腫瘍体積として表される。提示された様々な研究において、1グループあたり、n=4,5または10のマウス
MGWLWNLLFLMAAAQSAQAQIQLVQSGPELKKPGETVKISCKASGYTFTTYGMSWVKQAPGRGLKWMGWINPYSGVPTYAVDFKGRFAFSLETSASTAYLQINNLKNEDTATYFCARGGRRGDFGYWGQGTTLTVSS(配列番号19)
MDFQVQIFSFLLISASVILSSGQIGLTQSPAIMSASPGEKVTMTCSASSSISYMHWYQQKPGTSPKTWIYDTSKLASGVPARFSGSGSGTSYSLTISSMEAEDAATYYCHQRSSHHTFGGGTKLEIK(配列番号20)
MNFGLSLIFLALILKGVQCEVQLVESGGDLVKPGGSLKLSCAASGFTFSSYGMSWVRLTPDKRLEWVATISSGGSHTYYPDSVRGRFTISRDNAKNTLYLQMSSLKSEDTAMYYCARHPIYYYISSYAMDYWGQGTSVTVSS(配列番号21)
MKLPVRLLVLMFWIPASSSDVVMTQTPLSLPVSLGDQASISCRSSQSLVHSTGNTYLHWYLQKPGQSPKLLIYKVSNRFSGVPDRFGGSGSGTDFTLKISRVEAEDLGVYFCSQSTHVPPTFGGGTKLEIK(配列番号22)
ATGGGTTGGCTGTGGAACTTGCTATTCCTGATGGCAGCTGCCCAAAGTGCCCAAGCACAGATCCAGTTGGTACAATCTGGACCTGAGCTGAAGAAGCCTGGAGAGACAGTCAAGATCTCCTGCAAGGCTTCTGGGTATACCTTCACAACCTATGGAATGAGCTGGGTGAAACAGGCTCCAGGAAGGGGTTTAAAGTGGATGGGCTGGATAAACCCCTACTCTGGAGTGCCAACATATGCTGTTGACTTCAAGGGACGGTTTGCCTTCTCTTTGGAAACCTCTGCCAGCACTGCCTATTTGCAGATCAACAACCTCAAAAATGAGGACACGGCTACATATTTCTGTGCAAGAGGAGGGCGGAGGGGGGACTTTGGCTACTGGGGCCAAGGCACCACTCTCACAGTCTCCTCA(配列番号23)
ATGGATTTTCAGGTGCAGATTTTCAGCTTCCTGCTAATCAGTGCCTCAGTCATACTGTCCAGCGGACAAATTGGTCTCACCCAGTCTCCAGCAATCATGTCTGCATCTCCAGGGGAGAAGGTCACCATGACCTGCAGTGCCAGCTCAAGTATAAGTTACATGCATTGGTACCAGCAGAAGCCAGGCACCTCCCCCAAAACATGGATTTATGACACATCCAAACTGGCTTCTGGAGTCCCTGCTCGCTTCAGTGGCAGTGGGTCTGGGACCTCTTATTCTCTCACAATCAGCAGCATGGAGGCTGAAGATGCTGCCACTTATTACTGCCATCAGCGGAGTAGTCACCACACGTTCGGAGGGGGGACCAAGCTGGAAATAAAA(配列番号24)
ATGAACTTCGGGCTCAGCTTGATTTTCCTTGCCCTTATTTTAAAAGGTGTCCAGTGTGAGGTGCAGCTGGTGGAGTCTGGGGGAGACTTAGTGAAGCCTGGAGGGTCCCTGAAACTCTCCTGTGCAGCCTCTGGATTCACTTTCAGTAGCTATGGCATGTCTTGGGTTCGCCTGACTCCAGACAAGAGGCTGGAGTGGGTCGCAACCATTAGCAGTGGTGGTAGTCACACCTACTATCCAGACAGTGTGAGGGGGCGATTCACCATCTCCAGAGACAATGCCAAGAACACCCTGTACCTGCAAATGAGCAGTCTGAAGTCTGAGGACACAGCCATGTATTACTGTGCAAGACACCCAATTTATTACTACATTAGTAGCTATGCTATGGACTACTGGGGTCAAGGAACCTCAGTCACCGTCTCCTCA(配列番号25)
ATGAAGTTGCCTGTTAGGCTGTTGGTGCTGATGTTCTGGATTCCTGCTTCCAGCAGTGATGTTGTGATGACCCAAACTCCACTCTCCCTGCCTGTCAGTCTTGGAGATCAAGCCTCCATCTCTTGCAGATCTAGTCAGAGCCTTGTACACAGTACTGGAAACACCTATTTACATTGGTACCTGCAGAAGCCAGGCCAGTCTCCAAAGCTCCTGATCTACAAAGTTTCCAACCGATTTTCTGGGGTCCCAGACAGGTTCGGTGGCAGTGGATCAGGGACAGATTTCACACTCAAGATCAGCAGAGTGGAGGCTGAGGATCTGGGAGTTTATTTCTGCTCTCAAAGTACACATGTTCCTCCGACGTTCGGTGGAGGCACCAAGCTGGAAATCAAA(配列番号26)
Claims (20)
- 個体においてサバイビン-発現腫瘍を治療するために、サバイビン-発現腫瘍を有する個体に投与される組成物であって、
重鎖可変領域及び軽鎖可変領域を有する、サバイビンに特異的な抗体を含み、
ここで、
a)前記重鎖可変領域が、配列番号7の配列を含むVH CDR1、配列番号8の配列を含むVH CDR2、及び配列番号9の配列を含むVH CDR3を含み、前記軽鎖可変領域が、配列番号10の配列を含むVL CDR1、配列番号11の配列を含むVL CDR2、及び配列番号12の配列を含むVL CDR3を含む、
又は
b)前記重鎖可変領域が、配列番号13の配列を含むVH CDR1、配列番号14の配列を含むVH CDR2、及び配列番号15の配列を含むVH CDR3を含み、前記軽鎖可変領域が、配列番号16の配列を含むVL CDR1、配列番号17の配列を含むVL CDR2、及び配列番号18の配列を含むVL CDR3を含む
組成物。 - 前記抗体が、キメラ抗体、ヒト化抗体、単鎖抗体、二重特異性抗体又は多特異性抗体である、請求項1に記載の組成物。
- 前記抗体が、アイソタイプIgG1、IgG2、IgG3、IgG4、IgM、IgA、IgD又はIgEを有する、請求項1に記載の組成物。
- 前記抗体が、アイソタイプIgG2b又はIgG1を有する、請求項3に記載の組成物。
- 前記重鎖可変領域が、配列番号19に少なくとも90%の配列同一性を有するアミノ酸配列を含み、前記軽鎖可変領域が、配列番号20に少なくとも90%の配列同一性を有するアミノ酸配列を含む、請求項1に記載の組成物。
- 前記重鎖可変領域が、配列番号21に少なくとも90%の配列同一性を有するアミノ酸配列を含み、前記軽鎖可変領域が、配列番号22に少なくとも90%の配列同一性を有するアミノ酸配列を含む、請求項1に記載の組成物。
- サバイビンに特異的に結合する単離モノクローナル抗体であって、重鎖可変領域と軽鎖可変領域を含んでおり、
a)前記重鎖可変領域が、配列番号7の配列を含むVH CDR1、配列番号8の配列を含むVH CDR2、及び配列番号9の配列を含むVH CDR3を含み、前記軽鎖可変領域が、配列番号10の配列を含むVL CDR1、配列番号11の配列を含むVL CDR2、及び配列番号12の配列を含むVL CDR3を含む、
又は
b)前記重鎖可変領域が、配列番号13の配列を含むVH CDR1、配列番号14の配列を含むVH CDR2、及び配列番号15の配列を含むVH CDR3を含み、前記軽鎖可変領域が、配列番号16の配列を含むVL CDR1、配列番号17の配列を含むVL CDR2、及び配列番号18の配列を含むVL CDR3を含む
モノクローナル抗体。 - 前記重鎖可変領域が、配列番号19に少なくとも90%の配列同一性を有するアミノ酸配列を含み、前記軽鎖可変領域が、配列番号20に少なくとも90%の配列同一性を有するアミノ酸配列を含む、請求項7に記載の抗体。
- 前記重鎖可変領域が、配列番号21に少なくとも90%の配列同一性を有するアミノ酸配列を含み、前記軽鎖可変領域が、配列番号22に少なくとも90%の配列同一性を有するアミノ酸配列を含む、請求項7に記載の抗体。
- 前記抗体が、キメラ抗体、ヒト化抗体、単鎖抗体、二重特異性抗体又は多特異性抗体である、請求項7に記載の抗体。
- 前記抗体が、アイソタイプIgG1、IgG2、IgG3、IgG4、IgM、IgA、IgD又はIgEを有する、請求項7に記載の抗体。
- 前記抗体が、アイソタイプIgG2b又はIgG1を有する、請求項11に記載の抗体。
- 請求項7に記載の抗体及び薬学的に許容されるキャリアを含む、医薬組成物。
- 請求項7に記載のモノクローナル抗体を産生するハイブリドーマ細胞。
- 前記モノクローナル抗体が、アイソタイプIgG2b又はIgG1である、請求項14に記載のハイブリドーマ細胞。
- 請求項7に記載のa)の重鎖可変領域及び軽鎖可変領域をコードするポリヌクレオチド配列が導入されている、形質転換細胞。
- 請求項7に記載のb)の重鎖可変領域及び軽鎖可変領域をコードするポリヌクレオチド配列が導入されている、形質転換細胞。
- 請求項7に記載の抗体を含むキメラ抗原受容体。
- 前記抗体が単鎖抗体である、請求項18に記載のキメラ抗原受容体。
- 請求項18に記載のキメラ抗原受容体を有する、単離された形質転換T細胞。
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