JP2021054739A - ビオチン改変二量体とフタロシアニン染料とのコンジュゲート - Google Patents
ビオチン改変二量体とフタロシアニン染料とのコンジュゲート Download PDFInfo
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Abstract
Description
[1] 下記式(1)で示される化合物又はその塩。
Xは、親水性基、カチオン基又はアミノ基を末端に有する置換基、あるいは−OHである。
X1a、X1b、X2a及びX2bはそれぞれ独立にO又はNHを示し、
Y1及びY2はそれぞれ独立にC又はSを示し、
Z1及びZ2はそれぞれ独立にO、S又はNHを示し、
V1及びV2はそれぞれ独立にS又はS+−O−を示し、n1及びn2はそれぞれ独立に0又は1の整数を示し、
L1及びL2はそれぞれ独立に、2価の連結基を示し、
L3は、3価の連結基を示し、
L4、L5、及びL6はそれぞれ独立に、2価の連結基を示す。)
[2] 下記式(2)で示される、[1]に記載の化合物又はその塩。
[3] X1a、X1b、X2a及びX2bがNHを示し、Y1及びY2がCを示し、Z1及びZ2がNHを示し、V1及びV2がSを示す、[1]又は[2]に記載のコンジュゲート。
[4] L1及びL2がそれぞれ独立に、−CONH−、−NHCO−、−COO−、−OCO―、−CO−、−O−、及び炭素数1から10のアルキレン基から選択される基の組み合わせからなる2価の連結基である、[1]から[3]の何れか一に記載のコンジュゲート。
[5] L4が、−CONH−、−NHCO−、−COO−、−OCO−、−CO−、−O−、−NH−、及び炭素数1から10のアルキレン基から選択される基の組み合わせからなる基である、[1]から[4]の何れか一に記載のコンジュゲート。
[6] L5が、
[7] L6が、−Si(R1)(R2)−O−、−CONH−、−NHCO−、−COO−、−OCO−、−CO−、−O−、−NH−、炭素数1から10のアルキレン基、またはこれらの組み合わせからなる基である、[1]から[6]の何れか一に記載のコンジュゲート。
[8] Xで示される親水性基、カチオン基又はアミノ基を末端に有する置換基が、下記の何れかである、[1]から[7]の何れか一に記載のコンジュゲート。
[11] (1)[1]から[9]の何れか一に記載のコンジュゲート、及び(b)配列番号1に記載のアミノ酸配列(ただし、C末端のヒスチジンタグの一部又は全部は欠失していてもよい)を含むストレプトアビジン変異体と分子プローブとのコンジュゲート:を含む治療キット。
[12] 分子プローブが、抗EREG抗体、抗CEA抗体、または抗HER2抗体である、[11]に記載の治療キット。
(1)ビオチン改変二量体
本発明は、ビオチン改変二量体とフタロシアニン染料とのコンジュゲートに関するものであり、下記式(1)で示される化合物又はその塩であり、好ましくは下記式(2)で示される化合物又はその塩である。
Y1及びY2はそれぞれ独立にC又はSを示し、
Z1及びZ2はそれぞれ独立にO、S又はNHを示し、
V1及びV2はそれぞれ独立にS又はS+−O−を示し、n1及びn2はそれぞれ独立に0又は1の整数を示し、
L1及びL2はそれぞれ独立に、2価の連結基を示し、
L3は、3価の連結基を示し、
L4は、2価の連結基を示す。
L1及びL2はそれぞれ独立に、−CONH−、−NHCO−、−O−、及び炭素数1から10のアルキレン基から選択される基の組み合わせからなる2価の連結基であることが好ましい。
L1、及びL2はそれぞれ独立に、−CONH−、−NHCO−、及び炭素数1から10のアルキレン基から選択される基の組み合わせからなる2価の連結基であることが好ましい。
フタロシアニン染料は、好ましくはシリコンフタロシアニン染料である。IRDye(登録商標)700DXのようなフタロシアニン染料の具体例は、例えば、米国特許第7,005,518号に記載されている。フタロシアニン染料としては、IRDye(登録商標)700DXなどの市販品を使用することができる。
フタロシアニン染料としては、下記式で示される染料を使用することができる。星印はビオチン改変二量体を連結するための連結基との結合部位を示す。
本発明によれば、本発明のビオチン改変二量体とフタロシアニン染料とのコンジュゲートと、ストレプトアビジン変異体―分子プローブコンジュゲートとを組み合わせた治療キットが提供される。
上記の中でも、エピレギュリン(EREG)、CEA、およびHER2が好ましい。
本発明によるビオチン改変二量体とフタロシアニン染料とのコンジュゲートを対象に投与し、細胞増殖の抑制または細胞死を誘発するのに有効な量で励起光を細胞に照射することによって、細胞増殖の抑制または細胞死を誘発し、対象を治療することができる。
LRMS (ESI): m/z 1031.55 [M+H]+, 516.35 [M+2H]2+, 344.75 [M+3H]3+
LRMS (ESI): m/z 805.30 [M+H] +
LRMS (ESI): m/z 1006.85 [M+H] +
LRMS (ESI): m/z 1372.55 [M+H] +
化合物 9: 1H NMR (500 MHz, CD3OD): δ 9.70 (dd, J = 2.8 Hz, 5.7 Hz, 8H), 8.46 (dd, J = 2.8 Hz, 5.7 Hz, 8H), 3.97 (t, J = 4.8 Hz, 2H), 3.63-3.58 (m, 8H), 3.32 (m, 2H), 2.75 (t, J = 6.7 Hz, 4H), 2.56 (brs, 4H), 1.71 (m, 6H), 1.60 (t, J= 6.7 Hz, 2H), -1.00 (m, 2H), -1.14 (m, 2H), -2.15 (m, 2H), -2.27 (m, 2H), -2.83 (s, 6H), -2.89 (s, 6H).
LRMS (ESI): m/z 1249.80 [M+H] +
LRMS (ESI): m/z 1202.50 [M+2H]2+
LRMS (ESI): m/z 1048.30 [M] +
LRMS (ESI): m/z 1019.25 [M+2H]2+, 679.65 [M+3H]3+, 510.00 [M+4H]4+
1H NMR (500 MHz, CDCl3): δ 9.16 (m, 8H), 8.22 (d, J = 1.9 Hz, 4.7 Hz, 8H), 0.98 (t, J = 7.6 Hz, 2H), -1.47 (m, 2H), -2.51 (t, J = 8.6 Hz, 2H), -2.86 (s, 6H).
V2122は、国際公開WO2015/125820の実施例3(国際公開WO2015/125820の配列番号4)に記載されているストレプトアビジン変異体である。V2122のアミノ酸配列(C末端に6×Hisタグを有する配列)を配列表の配列番号1に記載する。
CEA-V2122融合タンパク質の発現のために、大腸菌にて分泌発現するためのpelBシグナルをN末端に、また6xHis-Tag配列をC末端に組み込んだCEA-V2122遺伝子配列のDNAコドンを大腸菌に最適化し人工遺伝子合成を行なった。このアミノ酸配列を配列表の配列番号4、DNA配列を配列表の配列番号5に記載する。また、ドメイン構造の概略を図1に示す。
図2より精製されたCEA-V2122は約150kDaの4量体を主たる成分であることが確認された。
CEA-V2122と抗原CEACAM5との親和性を表面プラズモン共鳴(SPR)測定装置:Biacore T200 (GE Healthcare Life Sciences社) を用いて実施した。具体的には Recombinant Human CEACAM-5/CD66e Protein, CF (R&D SYSTEMS社) を Sensor Chip CM5 (GE Healthcare Life Sciences社) にアミンカップリングキット (GE Healthcare Life Sciences社) を用いて固定化操作を行い、リガンドの最終固定化量は279RUとなった。また、精製されたCEA-V2122は 1E-08 M から 6.25E-10 M までの2倍希釈系列をアナライトとして調整した。相互作用解析は Single-Cycle Kinetics 解析にてデータの取得を行った。得られたデータを Biacore T200 Evaluation Software, version 2.0 にて Bivalent Analyze モードによるカーブフィッティングを実施しka1=3.208E+5, kd1=3.461E-7の値を得た。また、Bivalent AnalyzeではKD=kd1/ka1で評価できることからKD=kd1/ka1= 3.461E-7/3.208E+5=1.078E-12の評価値を得た。それらの結果を図3に示す。
図3に示されるセンサーグラム、KD値よりCEA-V2122はCEACAM5に強く結合することが確認された。
図4に示されるセンサーグラム、KD値よりCEA-V2122はビオチン改変体に強く結合することが確認された。
CEACAM5発現陽性のがん細胞株の染色のために、精製された CEA-V2122 タンパク質を100 μg 使用しFITC標識を行なった。具体的には、Fluorescein Labeling Kit - NH2 (同仁化学研究所) を用いて操作手順書の用法用量に従い標識を実施し、得られた産物を CEA-V2122-FITC とした。具体的なCEACAM5発現陽性のがん細胞株の染色は次のとおりである。 CELLSTAR, μClear, 96ウエルプレート (Greiner社) に2.0x104cell/well となるようにCEACAM5陽性のヒト胃がん由来MKN-45細胞とCEACAM5陰性のヒト結腸がん由来DLD1細胞を播種し一晩培養した。次に 20 nM CEA-V2122-FITCと1μM Hoechist を含む培養液を100 μL/well となるように添加し4℃にて30分間反応ののち、In Cell Analyzer 6000 (GE Healthcare Life Sciences社) にて画像の取得を行なった。その結果を図5および図6に示す。
光活性化化合物標識ビオチン改変体(コンパウンド1(化合物10)、コンパウンド2(化合物11)、コンパウンド3(化合物17)、コンパウンド4(化合物13)およびコンパウンド5(化合物14))を用いて細胞傷害性試験を実施した。具体的には図5に示されるように、CEA陽性MKN45細胞とCEA陰性DLD1細胞を細胞培養用96ウェルプレートに細胞数が 5x103 cells/well、培養液が 100 μL/well となるように播種し一晩培養した。CEA-V2122と光活性化化合物標識ビオチン改変体の複合体溶液は、CEA-V2122と各コンパウンドとのモル比が1:2となるように混合し室温で10分間インキュベーションをおこない、CEA-V2122の最終濃度5 μg/mLとなるように培養液で濃度調製を行なった。希釈系列は5 μg/mLを開始濃度とし、5倍希釈系列(5.0 μg/mL, 1.0 μg/mL, 0.2 μg/mL)を調製した。また、複合体を含まない培地のみをコントロールとした。
AEAGITGTWSDQLGDTFIVTAGADGALTGTYENAVGGAESRYVLTGRYDSAPATDGSGTALGWTVAWKNNSKNAHSATTWSGQYVGGADAKINTQWLLTSGTTNANAWKSTLVGHDTFTKVKPSAASHHHHHH
QVKLEQSGAEVVKPGASVKLSCKASGFNIKDSYMHWLRQGPGQRLEWIGWIDPENGDTEYAPKFQGKATFTTDTSANTAYLGLSSLRPEDTAVYYCNEGTPTGPYYFDYWGQGTLVTVSSGGGGSGGGGSGGGGSENVLTQSPSSMSVSVGDRVNIACSASSSVPYMHWLQQKPGKSPKLLIYLTSNLASGVPSRFSGSGSGTDYSLTISSVQPEDAATYYCQQRSSYPLTFGGGTKLEIK
QVKLEQSGAEVVKPGASVKLSCKASGFNIKDSYMHWLRQGPGQRLEWIGWIDPENGDTEYAPKFQGKATFTTDTSANTAYLGLSSLRPEDTAVYYCNEGTPTGPYYFDYWGQGTLVTVSSGGGGSGGGGSGGGGSENVLTQSPSSMSVSVGDRVNIACSASSSVPYMHWLQQKPGKSPKLLIYLTSNLASGVPSRFSGSGSGTDYSLTISSVQPEDAATYYCQQRSSYPLTFGGGTKLEIKGGGGSGGGGAEAGITGTWSDQLGDTFIVTAGADGALTGTYENAVGGAESRYVLTGRYDSAPATDGSGTALGWTVAWKNNSKNAHSATTWSGQYVGGADAKINTQWLLTSGTTNANAWKSTLVGHDTFTKVKPSAASHHHHHH
MKYLLPTAAAGLLLLAAQPAMAQVKLEQSGAEVVKPGASVKLSCKASGFNIKDSYMHWLRQGPGQRLEWIGWIDPENGDTEYAPKFQGKATFTTDTSANTAYLGLSSLRPEDTAVYYCNEGTPTGPYYFDYWGQGTLVTVSSGGGGSGGGGSGGGGSENVLTQSPSSMSVSVGDRVNIACSASSSVPYMHWLQQKPGKSPKLLIYLTSNLASGVPSRFSGSGSGTDYSLTISSVQPEDAATYYCQQRSSYPLTFGGGTKLEIKGGGGSGGGGAEAGITGTWSDQLGDTFIVTAGADGALTGTYENAVGGAESRYVLTGRYDSAPATDGSGTALGWTVAWKNNSKNAHSATTWSGQYVGGADAKINTQWLLTSGTTNANAWKSTLVGHDTFTKVKPSAASHHHHHH
ATGAAATATCTGCTGCCGACCGCAGCAGCGGGTCTGCTGCTGCTGGCAGCACAGCCTGCAATGGCACAGGTTAAACTGGAACAGAGCGGTGCCGAAGTTGTTAAACCGGGTGCAAGCGTTAAACTGAGCTGTAAAGCAAGCGGCTTTAACATCAAAGATAGCTATATGCATTGGCTGCGTCAGGGTCCGGGTCAGCGTCTGGAATGGATTGGTTGGATTGATCCGGAAAATGGTGATACCGAATATGCACCGAAATTTCAGGGTAAAGCAACCTTTACCACCGATACCAGCGCAAATACCGCATATCTGGGTCTGAGCAGCCTGCGTCCGGAAGATACCGCAGTGTATTATTGTAATGAAGGCACCCCGACCGGTCCGTATTATTTCGATTATTGGGGTCAGGGCACCCTGGTTACCGTTAGCAGCGGTGGTGGTGGTAGTGGTGGCGGTGGTTCAGGCGGTGGCGGTAGCGAAAATGTTCTGACCCAGAGCCCGAGCAGCATGAGCGTTAGCGTTGGTGATCGTGTTAATATTGCATGTAGCGCAAGCAGCAGCGTTCCGTACATGCACTGGCTGCAGCAGAAACCGGGTAAAAGCCCGAAACTGCTGATTTATCTGACCAGCAATCTGGCAAGCGGTGTTCCGAGCCGTTTTAGCGGTAGCGGTAGTGGCACCGATTATAGCCTGACCATTAGCAGCGTGCAGCCTGAAGATGCAGCAACCTATTATTGTCAGCAGCGTAGCAGTTATCCGCTGACCTTTGGTGGTGGCACCAAACTGGAAATTAAAGGGGGTGGTGGCTCAGGTGGCGGAGGTGCAGAAGCAGGTATTACCGGTACATGGTCAGATCAGCTGGGTGATACCTTTATTGTTACCGCAGGCGCAGATGGTGCACTGACCGGCACCTATGAAAATGCAGTTGGTGGTGCAGAAAGCCGTTATGTGCTGACCGGTCGTTATGATAGCGCACCGGCAACCGATGGTAGCGGCACCGCACTGGGTTGGACCGTTGCATGGAAAAATAACAGCAAAAATGCACATAGCGCAACCACCTGGTCAGGTCAGTATGTGGGTGGTGCCGATGCCAAAATTAACACCCAGTGGCTGCTGACCAGCGGTACAACCAATGCAAATGCCTGGAAAAGTACCCTGGTTGGTCATGATACATTCACCAAAGTTAAACCGAGCGCAGCAAGCCATCATCATCACCATCATTAA
MDKIAIVNMGSLFQQVAQKTGVSNTLENEFKGRASELQRMETDLQAKMKKLQSMKAGSDRTKLEKDVMAQRQTFAQKAQAFEQDRARRSNEERGKLVTRIQTAVKSVANSQDIDLVVDANAVAYNSSDVKDITADVLKQVK
配列番号7
GGGGSGGGG
配列番号8
AAGGAGATATACATATGGATAAAATTGCCATTGTTAATAT
配列番号9
TTGAGATCTGCCATATGTTATTTCACTTGTTTCAGAACG
AGAAGGAGATATACCATGAAATATCTGCTGCCGAC
配列番号11
CGCCGAGCTCGAATTTTAATGATGGTGATGATGATG
配列番号12
GGTATATCTCCTTCTTAAAGTTAAAC
配列番号13
AATTCGAGCTCGGCGCGCCTGCAG
Claims (12)
- X1a、X1b、X2a及びX2bがNHを示し、Y1及びY2がCを示し、Z1及びZ2がNHを示し、V1及びV2がSを示す、請求項1又は2に記載のコンジュゲート。
- L1及びL2がそれぞれ独立に、−CONH−、−NHCO−、−COO−、−OCO―、−CO−、−O−、及び炭素数1から10のアルキレン基から選択される基の組み合わせからなる2価の連結基である、請求項1から3の何れか一項に記載のコンジュゲート。
- L4が、−CONH−、−NHCO−、−COO−、−OCO−、−CO−、−O−、−NH−、及び炭素数1から10のアルキレン基から選択される基の組み合わせからなる基である、請求項1から4の何れか一項に記載のコンジュゲート。
- L6が、−Si(R1)(R2)−O−、−CONH−、−NHCO−、−COO−、−OCO−、−CO−、−O−、−NH−、炭素数1から10のアルキレン基、またはこれらの組み合わせからなる基である、請求項1から6の何れか一項に記載のコンジュゲート。
- 請求項1から9の何れか1項に記載のコンジュゲートを含む、治療剤。
- (1)請求項1から9の何れか1項に記載のコンジュゲート、及び(b)配列番号1に記載のアミノ酸配列(ただし、C末端のヒスチジンタグの一部又は全部は欠失していてもよい)を含むストレプトアビジン変異体と分子プローブとのコンジュゲート:を含む治療キット。
- 分子プローブが、抗EREG抗体、抗CEA抗体、または抗HER2抗体である、請求項11に記載の治療キット。
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