JP2019524153A - 腫瘍血管形成を抑制するvegfディープブロッカーを含む癌治療用組成物及びその製造方法 - Google Patents
腫瘍血管形成を抑制するvegfディープブロッカーを含む癌治療用組成物及びその製造方法 Download PDFInfo
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Abstract
Description
以下、実施例により本発明についてさらに詳しく説明する。これら実施例は、単に本発明をより具体的に説明するためであり、本発明の要旨により本発明の範囲がこれら実施例によって制限されないことは、本発明が属する技術分野における通常の知識を有する者に自明であろう。
1.VEGFR1−NRP1−Fc融合タンパク質の製造
VEGFR1遺伝子のIg2ドメインは、合成したDNA(EZbio)をPCRして得、NRP1のb1ドメインはcDNAを韓国生命工学研究院人間遺伝子銀行から購入した。前記2つのDNAのカケラをhuman Fc DNAのカケラに付けて融合タンパク質を得た。クローニングしたDNAをHEK293E細胞で発現し、その培養液をプロテイン(Protein)A樹脂(resin)で精製した。精製したタンパク質の濃度は、A280吸光度を測定することによって計算した。
VEEP及びVEGF−trapをVEGFがコートした96−ウェルプレート(well plate)に添加する。数回洗浄した後、HRPが接合された抗ヒトFc(HRP−conjugated anti−human Fc)を入れて安定化したTMBを添加した後、450nmで吸光度を測定する。
対象疾患及び固形癌動物モデル
薬物の坑癌効果の確認のための動物モデルとして、6週令の雄C57BL/6マウスをKOATECH社(平沢市、韓国)から購入して用いた。動物は、動物実験倫理規定に従い1週間の適応期間を経た後に用いた。マウスの固形癌誘導にはLLC(Lewis lung carcinoma)細胞株をATCC社から購入して用いた。
6週令C57BL/6マウスの右側面の背中側(Right flank region)に1x106個のLLC cellを皮下(subcutaneous、s.c)注入した。その後、9日目から3日間隔で総8回のVEEPとVEGF−trapとを各25mg/kg皮下投与した。30日にわたって3〜4日間隔で固形癌の増殖を測定して生存を観察した。固形癌の大きさの測定は、電子デジタルカリパス(electronic digital caliper)を用いて直交で横(長い直径)と縦(短い直径)の長さを測定し、固形癌の体積は、Π/6x(横)2x縦で計算して算出した。30日目にマウスを犠牲にして固形癌を摘出した後、マイクロバランスを用いて重量を測定した。
精製したVEGFR1−NRP1−Fc融合タンパク質を還元(Reducing)&非還元(non−reducing)の条件でSDS−PAGE分析により単量体(monomer)と二量体(dimer)とが予想大きさの位置に現れることを確認した(図2)。
製造した融合タンパク質のVEEPのVEGFAに対する親和度を特定するために、ELISA分析によりVEGFの受容体またはブロッカーに対する親和度を分析した。親和度テストのためにVEGFA同型タンパク質中のVEGF165を使用した。対照群には細胞で自然に発現するVEGFA受容体のVEGFR1、VEGFR2、NRP1及びNRP2を含んで市販のブロッカーであるVEGF−trap、ベバシズマブ(Bevacizumab)及びラニビズマブ(ranibizumab)を使用して比較分析した。テストの結果、対照群の中ではVEGF−trapが結合親和度が最も高く示された。それに比べて本発明者らが製造した融合タンパク質であるVEEPは全ての対照群と比較してVEGF165に対して結合親和度が最も高く示され、VEGF−trapより10倍程度高い結合親和度を示した(表1)。
本発明により製造して精製したVEEP融合タンパク質の坑癌効果を測定するためにLLCネズミモデルを用いて固形癌の増殖を測定して生存を観察した。LLCネズミの固形癌の増殖を測定した結果、ブロッカーを処理しない対照群は、癌の大きさが13105mm3で測定された。VEGF−trapを処理した場合、大きさが9479mm3に減少したが、ネズミモデル個体間にその効果の偏差が大きく示された。これに対し、VEEPを処理したネズミの固形癌の大きさは、5872mm3で測定され、これはブロッカーを処理しない対照群と比較して坑癌効果が有意に減少したことが観察された(図3)。また、VEGF−trapの坑癌効果より優れた結果を示した。生存率においてもVEEP融合タンパク質は80%で測定されたが、これはVEGF−trap処理した対照群(80%)やブロッカーを処理しない対照群(0%)に比べて優れた結果である。したがって、本発明で製造したVEEP融合タンパク質をVEGF−trapで治療できない患者の場合に用いられると思われる。
LLCネズミモデルにおいてLLCネズミにVEEPを処理してから30日目の癌の重量と大きさとを測定した結果、固形癌の重量は、VEGF−trapを処理した対照群(7.49g)に比べてVEEP融合タンパク質を処理したネズミ(5.15g)で有意に減少したことが確認された(図3)。腫瘍の大きさを見れば、VEGF−trapを処理したネズミの場合、個体別に大きさの偏差が大きいことが確認されたが、VEEPを処理したネズミは、癌大きさが平均的により小さく、個体間に類似の水準に減少したことが確認できた(図4)。したがって、前記坑癌効果分析の結果と同様に、本発明のVEEPブロッカーは、VEGF−trapで治療効果がなかった患者の場合に用いることができると思われる。
1. Arcondeguy, T., et al. (2013). VEGF-A mRNA processing, stability and translation: a paradigm for intricate regulation of gene expression at the post-transcriptional level. Nucleic Acids Res 41, 7997-8010.
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4. Bhagat, N., et al. (2009)Diabetic macular edema: pathogenesis and treatment. Surv. Ophthalmol. 54(1), 1-32.
5. Houck,K.A., et al. (1991) The vascular endothelial growth factor family: identification of a fourth molecular species and characterization of alternative splicing of RNA. Mol. Endocrinol. 5, 1806.1814.
6. Vempati,P., Popel,A.S. and Mac Gabhann,F. (2011) Formation of VEGF isoform-specific spatial distributions governing angiogenesis: computational analysis. BMC Syst. Biol. 5, 59.
7. Houck, K.A., et al. (1992) Dual regulation of vascular endothelial growth factor bioavailability by genetic and proteolytic mechanisms. J. Biol. Chem. 267, 26031-26037.
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9. Ferrara,N., Gerber,H.P. and LeCouter,J. (2003) The biology of VEGF and its receptors. Nat. Med. 9, 669-676.
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11. Ferrara,N. (2002) VEGF and the quest for tumour angiogenesis factors. Nat. Rev. Cancer 2, 795-803.
12. Folkman,J. (1995) Angiogenesis in cancer, vascular, rheumatoid and other disease. Nat. Med. 1, 27-31.
13. Stewart, M.W. (2012). Aflibercept (VEGF Trap-eye): the newest anti-VEGF drug. Br J Ophthalmol 96, 1157-1158.
14. Finley, S.D., Dhar, M., and Popel, A.S. (2013). Compartment model predicts VEGF secretion and investigates the effects of VEGF trap in tumor-bearing mice. Front Oncol 3, 196.
配列表1 VEGFR1部分配列
VSDTGRPFVEMYSEIPEIIHMTEGRELVIPCRVTSPNITVTLKKFPLDTLIPDGKRIIWDSRKGFIISNATYKEIGLLTCEATVNGHLYKTNYLTHRQTNT (VEGFR1)
配列表2 Nrp1部分配列
SaiakegfSanysvLQSsvsedfkcmealgmesgeihsdqitassqystnwsaersrlnypengwtpgedsyrewiqvdlgllrfvtavgtqgaisketkkkyyvktykidvssngedwitikegnkpvlfqgntnptdvvvavfpkplitrfvrikpatwetgismrfevygckit
配列表3 免疫グロブリンFcドメイン
DKTHTCPPCPAPELLGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNWYVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCKVSNKALPAPIEKTISKAKGQPREPQVYTLPPSREEMTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLSPGK
配列表4 リーダー配列
MYLGLNYVFIVFLLNGVQS
配列表5 全長配列
MYLGLNYVFIVFLLNGVQSVSDTGRPFVEMYSEIPEIIHMTEGRELVIPCRVTSPNITVTLKKFPLDTLIPDGKRIIWDSRKGFIISNATYKEIGLLTCEATVNGHLYKTNYLTHRQTNTSaiakegfSanysvLQSsvsedfkcmealgmesgeihsdqitassqystnwsaersrlnypengwtpgedsyrewiqvdlgllrfvtavgtqgaisketkkkyyvktykidvssngedwitikegnkpvlfqgntnptdvvvavfpkplitrfvrikpatwetgismrfevygckitDKTHTCPPCPAPELLGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSHEDPEVKFNWYVDGVEVHNAKTKPREEQYNSTYRVVSVLTVLHQDWLNGKEYKCKVSNKALPAPIEKTISKAKGQPREPQVYTLPPSREEMTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLYSKLTVDKSRWQQGNVFSCSVMHEALHNHYTQKSLSLSPGK
Claims (10)
- 血管内皮増殖因子受容体1(VEGFR1)のIg2ドメイン及びニューロピリン1(NRP1)のb1ドメインを含むことを特徴とする融合タンパク質。
- 前記タンパク質は、配列番号1、配列番号2、配列番号3を含む請求項1に記載の融合タンパク質。
- 前記融合タンパク質は、配列番号4をさらに含むことを特徴とする請求項3に記載の融合タンパク質。
- 前記融合タンパク質は、配列番号5であることを特徴とする請求項3に記載の融合タンパク質。
- 請求項1ないし4の何れか一項による融合タンパク質を含む癌治療用組成物。
- 請求項1ないし4の何れか一項による融合タンパク質をコードするDNAフラグメント。
- 請求項6によるDNAフラグメントを含むことを特徴とする組み換えベクター。
- 請求項7による組み換えベクターに形質転換された細胞。
- 前記細胞は、HEK293Eであることを特徴とする請求項6に記載の細胞。
- (a)請求項8による形質転換された細胞を培養する段階;及び(b)前記細胞の培養液から融合タンパク質を分離することを特徴とする癌治療用タンパク質の製造方法。
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PCT/KR2016/007231 WO2018008772A1 (ko) | 2016-07-05 | 2016-07-05 | 종양 혈관형성을 억제하는 vegf 딥 블로커를 포함하는 암 치료용 조성물 및 이의 제조방법 |
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WO2009112245A1 (en) * | 2008-03-14 | 2009-09-17 | Transgene S.A. | Antibody against the csf-1 r |
US20110243912A1 (en) * | 2004-03-05 | 2011-10-06 | Vegenics Limited | Growth Factor Binding Constructs Materials and Methods |
JP2014506572A (ja) * | 2011-02-14 | 2014-03-17 | トランジェーヌ、ソシエテ、アノニム | Csf−1rに対する抗体 |
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US20030113324A1 (en) | 2001-10-01 | 2003-06-19 | Kari Alitalo | Neuropilin/VEGF-C/VEGFR-3 materials and methods |
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CN102264755A (zh) | 2007-08-08 | 2011-11-30 | 得克萨斯大学体系董事会 | 靶向vegfr-1/nrp-1的肽 |
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WO2011143408A1 (en) * | 2010-05-13 | 2011-11-17 | Genentech, Inc. | Use of neuropilin-1 antagonists for the treatment of cancer |
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US20110243912A1 (en) * | 2004-03-05 | 2011-10-06 | Vegenics Limited | Growth Factor Binding Constructs Materials and Methods |
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JP2011512851A (ja) * | 2008-03-14 | 2011-04-28 | トランジェーヌ、ソシエテ、アノニム | Csf−1rに対する抗体 |
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CA3029752A1 (en) | 2018-01-11 |
JP6876126B2 (ja) | 2021-05-26 |
KR20190016085A (ko) | 2019-02-15 |
WO2018008772A1 (ko) | 2018-01-11 |
KR102216566B1 (ko) | 2021-02-17 |
EP3486254A1 (en) | 2019-05-22 |
CN109476719A (zh) | 2019-03-15 |
CA3029752C (en) | 2022-03-15 |
EP3486254A4 (en) | 2019-12-18 |
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