JP6511445B2 - 医薬品として使用するためのbag3受容体結合分子 - Google Patents
医薬品として使用するためのbag3受容体結合分子 Download PDFInfo
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- JP6511445B2 JP6511445B2 JP2016532766A JP2016532766A JP6511445B2 JP 6511445 B2 JP6511445 B2 JP 6511445B2 JP 2016532766 A JP2016532766 A JP 2016532766A JP 2016532766 A JP2016532766 A JP 2016532766A JP 6511445 B2 JP6511445 B2 JP 6511445B2
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Description
2つのプールの2000万個のマクロファージ細胞(J774細胞株)を30分間氷上で解凍した。細胞をpH8.0の1×プロテアーゼ阻害剤溶液(PIC 1X、Roche)を含む冷PBS 1× 10mlで3回洗浄した。次いで、細胞を1×PBS25mlに再懸濁し、BAG3組換えタンパク質(1μg/ml)25μgと共に4℃で1時間インキュベートした。陰性対照に使用する細胞の試料を、BAG3組換えタンパク質を用いないで同じ条件でインキュベートした。その後、細胞を冷PBS 1× 10mlで3回洗浄して過剰なタンパク質を除去した。最終的なペレットをPBS 1×、PIC 1×、pH8.0 5mlに再懸濁し、Dounceを用いて氷上で機械的に溶解した。膜を以下の通り逐次遠心分離によって分画した:4℃において500gで5分、4℃において15,000gで30分および4℃において100,000gで1時間。形質膜分画(100,000gでの遠心分離後に得られたペレット)をPBS 1X、PIC 1X、pH8.0 200μlを用いて再懸濁し、可溶化した。
形質膜の分画から得られたタンパク質を、0.2%DDM、PBS 1×、PIC 1 ×、pH8.0を含む溶液200μlを添加することによって希釈し、Slide−A−Lyzer透析カセット(10,000MWCO、0.1〜0.5ml容量、Pierce)で400ml透析緩衝液(0.1%DDM、PBS 1×、PIC 1×、5mMイミダゾール、pH8.0)において4℃で1時間透析した。緩衝液を換えた後、透析を一晩行った。透析した試料に結合緩衝液(0.1%DDM、PBS 1×、PIC 1×、5mMイミダゾール pH8.0)で平衡化したNi−NTA樹脂25μlを添加し、4℃で撹拌しながらインキュベートした。1000gで10秒間遠心分離した後、上清を除去した。樹脂を4倍体積の結合緩衝液(100μl)で2回洗浄し、4倍体積の洗浄緩衝液(0.1%DDM、PBS 1×、PIC 1×、10mMイミダゾール、pH8.0)で3回洗浄した。結合したタンパク質を3×2倍体積(50μl)の溶出緩衝液(0.1%DDM、PBS 1×、PIC 1×、250mMイミダゾール、pH8.0)で溶出した。この精製により得られた各分画をSDS−PAGEで分析し、その後、PVDF膜に転写し、引き続いて、HRPとコンジュゲートした抗penta His抗体を用いて免疫検出した。溶出した第2の諸分画を1つに合わせて、トリクロロ酢酸(TCA)と共に濃縮した。タンパク質を、冷20%TCAを用いて氷上で2時間沈殿させた。遠心分離後、ペレットを冷アセトンで3回徹底的に洗浄した。最終的なペレットをグアニジン8M、Tris−HCl 100mM、pH8.0 5μlを用いて再懸濁した。この緩衝液は、全ての沈殿したタンパク質の可溶化を可能にし、また質量分析と適合性である。Nanodrop 2000分光光度計(ThermoScientific)により、280nmで吸光度を測定することによって、タンパク質濃度を測定した。
55℃で45分間15mM DTTによって還元した後、試料3.5μgを、室温で45分間50mMヨードアセトアミドによりアルキル化した。トリプシン消化を37℃で18時間行った。次いで、試料をSpeed−Vacで乾燥させ、最終的に0.3%TFA10mlに再懸濁した。0.05%TFA、98/2 H2O/ACNを含む溶液とC18キャピラリーカラムAcclaim Pep Map 100(5ミクロン、100A、300μm×5cm、Dionex)を用いて前濃縮した後に試料を消化に供した。次いで、0.1%ギ酸緩衝液 10/80 H2O/ACN、0.1%とC18 Acclaim PepMap100(3μm、100A、75μm×15cm、Dionex)を用いて、ペプチドを分離した。LTQ Velos(Themo Sceientific)によりタンデム質量分析(MSMS)を行った。Swiss−Protデータベース(UniProtKB、v12/2012)を用いて、Proteome Discover 1.1(MASCOTTEアルゴリズム、v2.2.4)ソフトウエアでデータを分析した。
J774細胞を40%コンフルエンスで24ウェルプレートに播種し、24時間後にNRP−1およびIFITM−2レベルを負に調節することができる特異的siRNAを用いてトランスフェクトした。NRP−1およびIFITM2のためのsiRNAをSanta Cruz(Santa Cruz.CA、米国)から得て、100nMの最終濃度のTransfectin(BIORAD、Carlsbad、米国)によるトランスフェクションに使用した。72時間後、細胞を回収し、溶解した。次いで、全タンパク質をSDS−PAGEでの分離によって分析し、次いで、同定した2つの受容体のレベルをウエスタンブロット法および2つの特異的抗体とのハイブリダイゼーションによって分析した。図3は、両タンパク質の構成的発現、およびsiRNAがこれらの発現を負に調節することができることを示している。GAPDHタンパク質を標識することができる抗体を使用して同一のゲルローディング条件を監視した。
J774細胞を、実施例4に記載されているように、NRP−1もしくはIFITM−2または両方のレベルを負に調節することができる特異的siRNAをトランスフェクトした。NRP−1およびIFITM2 siRNAをSanta Cruz(Santa Cruz.CA、米国)から得て、100nMの最終濃度のTransfectin(BIORAD、Carlsbad、米国)によるトランスフェクションに使用した。48時間後、細胞を回収し、ブロッキング緩衝液(PBS 1×/FBS5%)と共に4℃で30分間インキュベートし、その後、ここにFITC分子で誘導体化されたBAG3組換えタンパク質(10μg/百万個細胞)を4℃で30分間添加した。その後、細胞をPBS 1×/FBS5%で2回洗浄し、1200rpmで10分間遠心分離し、PBS 1×に再懸濁し、フローサイトメトリーで分析した。図4は、NRP−1もしくはIFITM−2または両方の負の調節が、細胞へのBAG3組換えタンパク質の結合の劇的減少をもたらすことを示している。使用するsiRNAが同定された2つの特異的受容体の1つのレベルを負に調節することができる場合、これにより結合の約75%の減少がもたらされ、この減少は、両タンパク質を低下させると88%になる。
J774細胞を40%コンフルエンスで24ウェルプレートに播種した。24時間後に、これらを100nMの最終濃度のNRP−1もしくはIFITM2または両方のためのsiRNAをトランスフェクトした。ミューティングの72時間後、rBAG3タンパク質(6μg/ml)を培養培地に16時間添加し、培地100μlを、ELISAを介したインターロイキン6アッセイのために回収した。
次いで、rBAG3タンパク質の結合を、BAG3とその受容体との間に挿入される分子の使用によって阻害することができることを証明した。
J774細胞を60%コンフルエンスで蒔き、10、30または100ng/mlの濃度のBAG3組換えタンパク質と共に24時間インキュベートした。亜硝酸塩産生を、Griess試薬(1%スルファニルアミド、0.1%ナフチルエチレンジアミン、5%リン酸)を用いて培養培地で検証し、550nMでBeckman DU−62分光光度計を用いて測定した。
フルオレセインイソチオシアネート(FITC)と結合したBAG3組換えタンパク質を用いて、BAG3タンパク質がマクロファージの表面には結合するが、心筋細胞(HCM)にも膵臓腺癌細胞(PANC−1)にも結合しないことを確認した(図9)。
マクロファージへのBAG3の結合の機能的意義を探るために、本発明者らは、細胞内の誘導型一酸化窒素合成酵素(iNOS)およびシクロオキシゲナーゼ−2(COX−2)に対するrBAG3発現の効果を試験した。80%コンフルエンスのJ774細胞を対照培地、BSA、LPSまたはrBAG3と共に20時間インキュベートした。ポリミキシンを添加して、BAG3組換えタンパク質の精製後にまだ存在する内毒素の非特異的効果の存在を検証した。COX−2およびiNOSを、ウエスタンブロット法によって細胞溶解物で分析した。
80%コンフルエンスのJ774 A1細胞を対照培地、BSA、LPSまたはrBAG3と共に24時間インキュベートした。各試料からの上清100plをGriess試薬100plと共にインキュベートし、550nmでの光学濃度(OD550)をBeckman DU62分光光度計で測定した。試料の550nmのODを標準亜硝酸ナトリウム曲線のものと比較することによって、亜硝酸塩濃度を評価した(図12)。
80%コンフルエンスのJ774A.1細胞を対照培地、BSA、LPSまたはBAG3と共に5時間インキュベートした。ELISA試験を用いて、IL−6を細胞培養培地で測定した。試料のODを標準IL−6組換え曲線のものと比較することによって、IL−6濃度を評価した(図13)。
Claims (9)
- 膵がんの治療に使用するための、BAG3受容体結合分子を含む医薬品であって、前記分子は、IFITM−2タンパク質に結合する分子であって、抗体および/またはそのフラグメントから選択されることを特徴とする、医薬品。
- 前記受容体がマクロファージの表面で発現されることを特徴とする請求項1に記載の医薬品。
- 前記分子がVEGFファミリータンパク質ではないことを特徴とする請求項1または2に記載の医薬品。
- 前記分子が、ポリクローナル抗体、モノクローナル抗体、マウス抗体、ヒト化抗体、キメラ抗体、組換え抗体、コンジュゲートされた抗体、scFvフラグメント(ダイアボディ(diabody)、トリアボディ(triabody)およびテトラボディ(tetrabody))、FabフラグメントまたはF(ab’)2フラグメントから選択されることを特徴とする請求項1に記載の医薬品。
- 前記分子が、抗IFITM−2抗体から選択されることを特徴とする請求項1に記載の医薬品。
- 前記治療の意図されているレシピエントがヒトであることを特徴とする請求項1から5のいずれか一項に記載の医薬品。
- 少なくとも1種の薬学的に許容される賦形剤と組み合わせた少なくとも1種のBAG3受容体結合分子を含む医薬組成物であって、前記分子は、抗IFITM−2抗体であることを特徴とする、膵がんの治療に使用するための医薬組成物。
- 同時、別々または逐次使用のための組み合わせ製剤としての、少なくとも1種の抗IFITM−2抗体と、少なくとも1種の抗BAG3抗体とを含む請求項7に記載の医薬組成物。
- 経口投与、非経口投与、または、局所投与に適した形態で処方されることを特徴とする請求項7または8に記載の医薬組成物。
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IT001351A ITMI20131351A1 (it) | 2013-08-07 | 2013-08-07 | Molecole leganti il recettore di bag3 per uso terapeutico. |
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PCT/IB2014/063352 WO2015019230A1 (en) | 2013-08-07 | 2014-07-23 | Bag3 receptor binding molecules for use as a medicament |
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JP2016532766A Active JP6511445B2 (ja) | 2013-08-07 | 2014-07-23 | 医薬品として使用するためのbag3受容体結合分子 |
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US (1) | US9963514B2 (ja) |
EP (1) | EP3030320B1 (ja) |
JP (1) | JP6511445B2 (ja) |
KR (1) | KR20160037951A (ja) |
AU (1) | AU2014304208B2 (ja) |
BR (1) | BR112016002619A2 (ja) |
CA (1) | CA2920586C (ja) |
ES (1) | ES2731257T3 (ja) |
IL (1) | IL243857A0 (ja) |
IT (1) | ITMI20131351A1 (ja) |
MX (1) | MX2016001691A (ja) |
RU (1) | RU2016107874A (ja) |
WO (1) | WO2015019230A1 (ja) |
Families Citing this family (3)
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JP2019017297A (ja) * | 2017-07-17 | 2019-02-07 | 杭州優瑪達生物科技有限公司Hangzhou UMotor Biotech Co., LTD. | 天然由来および/または自己集合技術によって得られる生体膜、生体膜性質を有する閉合構造または細胞内区画およびその作製方法と応用 |
CA3107625A1 (en) * | 2017-07-28 | 2019-01-31 | Biouniversa S.R.L. | Anti-bag3 antibodies as therapeutic reagent in cardiovascular diseases |
WO2021140173A1 (en) | 2020-01-10 | 2021-07-15 | Biouniversa S.R.L. | Methods and uses for treating fibrotic solid tumors with bags inhibitors |
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EP1323733A1 (en) | 2001-12-28 | 2003-07-02 | Arturo Leone | BAG3 nucleotide and protein sequences to be used in research, diagnostics and therapy for cell death-involving diseases |
EP2181595A1 (en) * | 2002-08-16 | 2010-05-05 | Yeda Research And Development Company Ltd. | Tumor associated antigen, peptides thereof, and use of same as anti-tumor vaccines |
EP1439192A1 (en) * | 2003-01-15 | 2004-07-21 | Xerion Pharmaceuticals AG | Neuropilin-1 inhibitors |
UA96139C2 (uk) * | 2005-11-08 | 2011-10-10 | Дженентек, Інк. | Антитіло до нейропіліну-1 (nrp1) |
WO2009036149A2 (en) * | 2007-09-15 | 2009-03-19 | The Government Of The United States Of America, As Represented By The Secretary, Dept. Of Health And Human Services | Methods for treatment of degenerative disease associated with apoptosis |
IT1397083B1 (it) | 2009-12-04 | 2012-12-28 | Biouniversa Srl | Marcatore biochimico serico |
ITMI20130403A1 (it) | 2013-03-18 | 2014-09-19 | Biouniversa Srl | Anticorpi anti-bag3 per uso terapeutico |
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2013
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2014
- 2014-07-23 KR KR1020167004419A patent/KR20160037951A/ko not_active Application Discontinuation
- 2014-07-23 AU AU2014304208A patent/AU2014304208B2/en not_active Ceased
- 2014-07-23 JP JP2016532766A patent/JP6511445B2/ja active Active
- 2014-07-23 EP EP14758663.0A patent/EP3030320B1/en active Active
- 2014-07-23 WO PCT/IB2014/063352 patent/WO2015019230A1/en active Application Filing
- 2014-07-23 CA CA2920586A patent/CA2920586C/en active Active
- 2014-07-23 RU RU2016107874A patent/RU2016107874A/ru not_active Application Discontinuation
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Also Published As
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US9963514B2 (en) | 2018-05-08 |
AU2014304208B2 (en) | 2020-02-20 |
IL243857A0 (en) | 2016-04-21 |
MX2016001691A (es) | 2016-11-30 |
CA2920586C (en) | 2023-09-12 |
RU2016107874A (ru) | 2017-09-14 |
JP2016527301A (ja) | 2016-09-08 |
CA2920586A1 (en) | 2015-02-12 |
KR20160037951A (ko) | 2016-04-06 |
AU2014304208A1 (en) | 2016-02-25 |
ITMI20131351A1 (it) | 2015-02-08 |
RU2016107874A3 (ja) | 2018-06-15 |
WO2015019230A1 (en) | 2015-02-12 |
ES2731257T3 (es) | 2019-11-14 |
BR112016002619A2 (pt) | 2017-08-01 |
EP3030320A1 (en) | 2016-06-15 |
US20160168255A1 (en) | 2016-06-16 |
EP3030320B1 (en) | 2019-03-20 |
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