JP5763105B2 - 頭頸部扁平上皮癌の治療に使用されるcd44に対するモノクローナル抗体 - Google Patents
頭頸部扁平上皮癌の治療に使用されるcd44に対するモノクローナル抗体 Download PDFInfo
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- JP5763105B2 JP5763105B2 JP2012551602A JP2012551602A JP5763105B2 JP 5763105 B2 JP5763105 B2 JP 5763105B2 JP 2012551602 A JP2012551602 A JP 2012551602A JP 2012551602 A JP2012551602 A JP 2012551602A JP 5763105 B2 JP5763105 B2 JP 5763105B2
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Description
アミノ酸配列RYWMS(配列番号:3)を有する重鎖可変ドメイン(VH)CDR1、
アミノ酸配列EVNPDSTSINYTPSLKD(配列番号:4)を有するVHCDR2、
アミノ酸配列PNYYGSRYHYYAMDY(配列番号:5)を有するVHCDR3、
アミノ酸配列RASQDINNYLN(配列番号:6)を有する軽鎖可変ドメイン(VL)CDR1、
アミノ酸配列YTSRLHS(配列番号:7)を有するVLCDR2、
アミノ酸配列QQGSTLPFT(配列番号:8)を有するVLCDR3、
の一又は複数を含む。
アミノ酸配列EVKLLESGGGLVQPGGSLKLSCATSGFDFSRYWMSWVRQAPGKGLEWIGEVNPDSTSINYTPSLKDQFIISRDNAKNTLDLQMSKVSSEDTALYYCTRPNYYGSRYHYYAMDYWGQGTSVTVSS(配列番号:1)を有するVHドメイン、及び/又は
アミノ酸配列DIQMTQTTSSLSVSLGDRVTINCRASQDINNYLNWYQQKPDGTVKLLIYYTSRLHSGVPSRFSGSGSGTDFSLTISNLEKEDVATYFCQQGSTLPFTFGSGTKLEIK(配列番号:2)を有するVLドメイン、
を含みうる。
アミノ酸配列EVQLVESGGGLVQPGGSLRLSCAASGFDFSRYWMSWVRQAPGKGLVWVGEVNPDSTSINYTPSLKDRFTISRDNAKNTLYLQMNSLRAEDTAVYYCTRPNYYGSRYHYYAMDYWGQGTLVTVSS(配列番号:9)、又は
EVQLVESGGGLVQPGGSLRLSCATSGFDFSRYWMSWVRQAPGKGLVWIGEVNPDSTSINYTPSLKDQFTISRDNAKNTLYLQMNSLRAEDTAVYYCTRPNYYGSRYHYYAMDYWGQGTLVTVSS(配列番号:10)
を有するVHドメイン、及び/又は
アミノ酸配列DIQMTQSPSSLSASVGDRVTITCRASQDINNYLNWYQQKPGKAPKLLIYYTSRLHSGVPSRFSGSGSGTDFTFTISSLQPEDIATYYCQQGSTLPFTFGQGTKLEIK(配列番号:11)を有するVLドメイン
を含む。
一般に、以下の用語又は語句は、概要、説明、実施例、及び特許請求の範囲で使用される場合、示した定義を有する。
(%配列同一性×%最大BLASTスコア)/100
として定義される生成物スコアであり、2つの配列間の類似度合い、及び配列適合の長さの双方を考慮する。例えば、生成物スコア40であると、適合は1−2%の誤差内で正確であり、70であると、適合は正確であろう。類似の分子が、15〜40の生成物スコアを示すものを選択することにより同定されるが、低スコアであると、関連分子が同定される可能性がある。配列アルゴリズムを生成可能なプログラムの他の例は、当該技術分野で知られているCLUSTALWコンピュータプログラム(Thompson, Nucl. Acids Res. 2(1994) 4673-4680)又はFASTDB(Brutlag, Comp. App. Biosci. 6(1990) 237-245)である。
本発明は、抗CD44抗体PTA-4621が、ネイキッド(すなわち未コンジュゲート)抗体として、HNSCCの治療に効果的であることを驚くべきことに示したという点で、特定された技術的問題を解決する。特に、HNSCCの樹立されたモデルにおける過去の抗CD44治療とは異なり、PTA-4621の未コンジュゲートキメラ及びヒト化型が、T.Tn、SCC-15、Detroit562及びCal27細胞の異種移植を含むHNSCCモデルにおいて腫瘍増殖を有意に低減し、及び/又は阻害した。
1項: 抗CD44モノクローナル抗体又はその抗原結合断片を、哺乳動物の腫瘍量の低減を生じさせるのに有効な量で、哺乳動物に投与することを含む、哺乳動物における頭頸部扁平上皮癌(HNSCC)を治療する方法。
2項: 抗CD44モノクローナル抗体がARH460-16-2である、1項の方法。
3項: 前記モノクローナル抗体が細胞毒部分にコンジュゲートしている、2項の方法。
4項: 前記モノクローナル抗体が、受託番号PTA-4621として、ATCCに寄託されたハイブリドーマにより生成されたモノクローナル抗体のヒト化型、又は該ヒト化抗体から生成された抗原結合断片である、1項の方法。
5項: 前記モノクローナル抗体が、受託番号PTA-4621として、ATCCに寄託されたハイブリドーマにより生成されたモノクローナル抗体のキメラ型、又は該キメラ抗体から生成された抗原結合断片である、1項の方法。
6項: 抗CD44モノクローナル抗体又はその抗原結合断片を、哺乳動物の腫瘍量の低減を生じさせるのに有効な量で、哺乳動物に投与することを含む、哺乳動物におけるHNSCCの治療のための、抗CD44モノクローナル抗体又はその抗原結合断片の使用。
7項: 抗CD44モノクローナル抗体がARH460-16-2である、6項の使用。
8項: 前記モノクローナル抗体が細胞毒部分にコンジュゲートしている、7項の使用。
9項: 前記モノクローナル抗体が、受託番号PTA-4621として、ATCCに寄託されたハイブリドーマにより生成されたモノクローナル抗体のヒト化型である、6項の使用。
10項: 前記モノクローナル抗体が、受託番号PTA-4621として、ATCCに寄託されたハイブリドーマにより生成されたモノクローナル抗体のキメラ型である、6項の使用。
11項: 抗CD44モノクローナル抗体又はその抗原結合断片を、哺乳動物の腫瘍量の低減を生じさせるのに有効な量で、少なくとも1の化学療法剤と共に哺乳動物に投与することを含む、哺乳動物におけるHNSCCを治療する方法。
12項: 抗CD44モノクローナル抗体がARH460-16-2である、13項の方法。
13項: 前記モノクローナル抗体又はCDMABが、前記化学療法剤にコンジュゲートしている、14項の方法。
14項: 前記化学療法剤が細胞毒部分である、15項の方法。
15項: 前記モノクローナル抗体が、受託番号PTA-4621として、ATCCに寄託されたハイブリドーマにより生成されたモノクローナル抗体のヒト化型である、11項の方法。
16項: 前記モノクローナル抗体が、受託番号PTA-4621として、ATCCに寄託されたハイブリドーマにより生成されたモノクローナル抗体のキメラ型である、11項の方法。
17項: 受託番号PTA-4621として、ATCCに寄託されたハイブリドーマにより生成された抗CD44モノクローナル抗体、又はその抗原結合断片;及び
必要量の薬理学的に許容可能な担体;
を組み合わせて含有する、HNSCCの治療に有効な組成物。
18項: 細胞毒部分、酵素、放射活性化合物、サイトカイン類、インターフェロン、標的又はレポーター部分、及び造血細胞からなる群から選択されるメンバーと、前記モノクローナル抗体又はその抗原結合断片のコンジュゲートをさらに含む、17項の組成物。
19項: HNSCCの存在を検出するためのアッセイキットであって、該HNSCCが、受託番号PTA-4621として、ATCCに寄託されたハイブリドーマにより生成されたモノクローナル抗体、又はその抗原結合断片に特異的に結合する抗原の少なくとも1のエピトープを発現し、該キットが、受託番号PTA-4621として、ATCCに寄託されたハイブリドーマにより生成され、特定のカットオフレベルでのその存在が前記HNSCCの前記存在の診断となるポリペプチドに結合するモノクローナル抗体、又はその抗原結合断片を含むキット。
HNSCC細胞株へのインビトロ結合
PTA-4621のキメラ及びヒト化型を、ここに開示したようにして生じさせた。キメラPTA-4621(「chPTA-4621」)は、それぞれ配列番号:1及び配列番号:2のアミノ酸配列を有するVH及びVLドメインを含む。それらの重鎖可変ドメインのアミノ酸配列に少しの差異を有する、PTA-4621の2つのヒト化型(huPTA-4621)を生じさせた。huPTA-4621は、配列番号:9又は配列番号:10のアミノ酸配列を有するVHドメイン、及び配列番号:11のアミノ酸配列を有するVLドメインを含む。huPTA-4621の2つの型の抗原結合親和性及び結合活性は、当該技術分野で知られている標準的なアッセイを使用して、識別不能であった。
ヒトT.Tn細胞を用いたインビボ実験
ヒトHNSCC癌細胞株に対する効能をインビボで証明するために、キメラPTA-4621(chPTA-4621)を、樹立されたT.Tn HNSCC異種移植モデルにおいて試験した。図2及び3を参照し、6から8週齢の雌SCIDマウスに、100マイクロリットルのPBS溶液に10000000のT.Tn細胞が入ったものを、右側腹部に皮下注射して移植した。マウスを、10を2つの治療群にランダムに分けた。マウスの平均腫瘍体積が約264−268mm3に達した時に、20mg/kgのchPTA-4621試験用抗体、又はバッファーコントロールを、2.7mMのKCl、1mMのKH2PO4、137mMのNaCl、及び20mMのNa2HPO4を含む希釈液で、原液濃度から希釈した後、300マイクロリットルの容量で、各コホートに腹腔内的に投与した。ついで、抗体又はコントロール試料を、研究期間中、週当たり3回投与した。腫瘍増殖をノギスを使用し、約7日毎に測定した。抗体を10回投与した後に、研究を完了した。動物の体重を、研究期間中、1週間に1回記録した。研究の終わりに、全ての動物を、CCACガイドラインに従い安楽死させた。
ヒトSCC-15細胞を用いたインビボ実験
ヒトHNSCC癌細胞株に対するインビボでの効能を証明するために、ヒト化PTA-4621(huPTA-4621)を、SCC-15 HNSCC異種移植モデルにおいて試験した。図4及び5を参照し、6から8週齢の雌SCIDマウスに、100マイクロリットルのPBS溶液に3000000のSCC-15細胞が入ったものを、右側腹部に皮下注射して移植した。マウスを、10を2つの処置群にランダムに分けた。マウスの平均腫瘍体積が約233−235mm3に達した時に、30mg/kgのhuPTA-4621試験用抗体、又はHNTバッファーコントロールを、20mMのヒスチジンHCl、150mMのNaCl、及び0.01%のポリソルベート80、Ph6.0を含む希釈液で、原液濃度から希釈した後、100マイクロリットルの容量で、各コホートに腹腔内的に投与した。ついで、抗体又はコントロール試料を、研究期間中、週当たり1回投与した。腫瘍増殖をノギスを使用し、約7日毎に測定した。抗体を4回投与した後に、研究を完了した。動物の体重を、研究期間中、週毎に1回記録した。研究の終わりに、全ての動物を、CCACガイドラインに従い安楽死させた。
ヒトDetroit562細胞を用いたインビボ実験
ヒトHNSCC癌細胞株に対するインビボでの効能を証明するために、huPTA-4621を、Detroit562 HNSCC異種移植モデルにおいて試験した。図6及び7を参照し、6から8週齢の雌SCIDマウスに、100マイクロリットルのPBS溶液に3000000のDetroit562細胞が入ったものを、右側腹部に皮下注射して移植した。マウスを、10を2つの治療群にランダムに分けた。マウスの平均腫瘍体積が約188−192mm3に達した時に、30mg/kgのhuPTA-4621試験用抗体、又はバッファーコントロールを、20mMのヒスチジンHCl、150mMのNaCl、及び0.01%のポリソルベート80、Ph6.0を含有する希釈液で、原液濃度から希釈した後、100マイクロリットルの容量で、各コホートに腹腔内的に投与した。ついで、抗体又はコントロール試料を、研究期間中、週当たり1回投与した。腫瘍増殖をノギスを使用し、約7日毎に測定した。抗体を5回投与した後に、研究を完了した。動物の体重を、研究期間中、週毎に1回記録した。研究の終わりに、全ての動物を、CCACガイドラインに従い安楽死させた。
ヒトCAL27細胞を用いたインビボ実験
ヒトHNSCC癌細胞株に対するインビボでの効能を証明するために、huPTA-4621を、CAL27細胞(ATCC CRL-2095)が移植されたヌードマウス(NU/J, stock #: 002019, Jackson Laboratories)を含む、CAL27HNSCC異種移植モデルにおいて試験した。CAL27細胞を、細胞がコンフルエントになるまで、空気雰囲気中5%のCO2、37℃にて、75mm2のフラスコに10%のFBS(ATCCカタログ番号30-2020)が補填されたDMEM(ATCC、カタログ番号30-2002)において培養した。ヒトCAL27細胞を、0.25%(w/v)のトリプシン(Invitrogen、カタログ番号25200)を使用して培養フラスコから剥離させ、計測し、PBSに溶解させ、0.2ml容量に、マトリゲルTM(BD Biosciences、カタログ番号354248)と3x106細胞/動物が入った用量(PBS+100μlのマトリゲルに100μlの細胞が入ったもの)で、7週齢の雄ヌードマウスの中背部領域に皮下的に注射した。細胞の注射後、2週間経過させ、腫瘍小結節を形成させた。腫瘍量(mm3)をデジタルノギス(VWR、カタログ番号36934-152)で測定し、楕円式:[π/6]×a×b2によって推定し、ここで、a及びbは、腫瘍のmmでの第1及び第2の最も長い直交測定値である。腫瘍体積が400−600mm3に達した時、動物を2つの群(n=5)に無作為化した。モノクローナル抗体huPTA-4621及びヒトIgG1(Sigma、I5154)を、全体で10回、週当たり3回、3mg/kgを腹腔内注射により投与した。デジタルノギスを使用し、腫瘍小結節を、週当たり3回モニターした。抗腫瘍活性を、次の式:RTV=TVn/TV0に従い、相対的腫瘍体積(RTV)を算出することで、一次腫瘍増殖阻害に関して測定し、ここでTVnはn日目の腫瘍量であり、TV0は0日目の腫瘍量である。腫瘍サイズを27日間追跡した。治療の27日後、T/C%=100×(治療群の平均RTV)/(コントロール群の平均RTV)として、RTVを算出することにより、T/C%を測定した。60%の腫瘍増殖阻害が抗体治療群で見いだされ(図8)、治療が腫瘍量の軽減に有用であることが示された(P<0.0002)。
ヒトCAL27細胞を用いたインビボ実験
PTA-4621抗体治療の効能を標準的な化学療法治療と比較するため、実施例5に記載したモデルシステムを使用して、シスプラチンを用いた治療と、PTA-4621治療を比較した。実施例5に記載したようにして、CAL27細胞を培養し、収集した。CAL27細胞異種移植モデルを、100μlのマトリゲルと100μlのD-PBSに5X106のCAL27細胞が入ったものを、7週齢の雄ヌードマウス(NU/J, stock #: 002019, Jackson Laboratories)の中背部領域に皮下的に注射することで樹立させた。接種の18日後、マウスを腫瘍形成について評価し、3つの群(各コホートについて、n=6):huPTA-4621での治療、シスプラチンでの治療又はコントロールでの治療(無関係のコントロールIgG1抗体での治療)に無作為化した。腫瘍体積(mm3)をデジタルノギス(VWR、カタログ番号36934-152)で測定し、楕円式:[π/6]×a×b2によって推定し、ここで、a及びbは、腫瘍のmmでの第1及び第2の最も長い直交測定値である。無作為化で、平均腫瘍体積は84mm3(79−94mm3の範囲)であった。
Claims (4)
- 哺乳動物の頭頸部扁平上皮癌(HNSCC)の腫瘍増殖を低減するための医薬であって、前記医薬はヒト化モノクローナル抗CD44抗体又はその抗原結合性断片を含んでなり、前記HNSCCがCD44の発現により特徴付けられ、該ヒト化抗体は配列番号:9又は配列番号:10のアミノ酸配列を有するVHドメイン、及び配列番号:11のアミノ酸配列を有するVLドメインを含んでなり、前記ヒト化抗体は受託番号PTA-4621でATCCに寄託されたハイブリドーマにより生成された抗体とCD44への結合について競合するものである、医薬。
- 前記抗体又は断片が、治療部分又はレポーター部分に、あるいは造血細胞にコンジュゲートしている、請求項1に記載の医薬。
- 前記治療部分が細胞毒部分、酵素、サイトカイン、又はインターフェロンである、請求項2に記載の医薬。
- 前記治療部分又はレポーター部分が、放射性同位元素又は放射性核種である、請求項2に記載の医薬。
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US20140335084A1 (en) * | 2011-12-06 | 2014-11-13 | Hoffmann-La Roche Inc. | Antibody formulation |
US20150044232A1 (en) * | 2013-06-12 | 2015-02-12 | Hoffmann-La Roche Inc. | Markers for the responsiveness to anti-cd44 antibodies |
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KR102215384B1 (ko) * | 2014-06-11 | 2021-02-15 | (재) 스크립스코리아항체연구원 | CD44v3 도메인 3 및 도메인 6 특이적 단일클론 항체 및 그 용도 |
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