JP7600993B2 - ペプチド内包フェリチン - Google Patents
ペプチド内包フェリチン Download PDFInfo
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- JP7600993B2 JP7600993B2 JP2021544062A JP2021544062A JP7600993B2 JP 7600993 B2 JP7600993 B2 JP 7600993B2 JP 2021544062 A JP2021544062 A JP 2021544062A JP 2021544062 A JP2021544062 A JP 2021544062A JP 7600993 B2 JP7600993 B2 JP 7600993B2
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- Prior art keywords
- peptide
- ferritin
- encapsulated
- peptides
- amino acid
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- 125000005931 tert-butyloxycarbonyl group Chemical group [H]C([H])([H])C(OC(*)=O)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 125000003396 thiol group Chemical group [H]S* 0.000 description 1
- 229960004072 thrombin Drugs 0.000 description 1
- 201000009377 thymus cancer Diseases 0.000 description 1
- 201000002510 thyroid cancer Diseases 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 150000003852 triazoles Chemical class 0.000 description 1
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 description 1
- 201000005112 urinary bladder cancer Diseases 0.000 description 1
- 206010046766 uterine cancer Diseases 0.000 description 1
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Description
〔1〕ペプチドが、3~19個のアミノ酸残基から構成され、かつ
下記条件:
a)-10.2≦X≦5.9、かつ445≦Y≦2524;
(ここで、XはpH9でのペプチドの電荷を示し、Yはペプチドの化学式量を示す)
を満たす、ペプチド内包フェリチン。
〔2〕ペプチドが4~16個のアミノ酸残基から構成される、〔1〕のペプチド内包フェリチン。
〔3〕ペプチドが下記条件:
b)-10.2≦X≦0.0、かつ445≦Y≦2524;あるいは
c)3.7≦X≦5.9、かつ445≦Y≦2524
(ここで、XおよびYは〔1〕と同じである)
を満たす、〔1〕または〔2〕のペプチド内包フェリチン。
〔4〕ペプチドの細胞内送達剤であって、
ペプチド内包フェリチンを含み、
ペプチドが、3~19個のアミノ酸残基から構成され、かつ
下記条件:
a)-10.2≦X≦5.9、かつ445≦Y≦2524;
(ここで、XはpH9でのペプチドの電荷を示し、Yはペプチドの化学式量を示す)
を満たす、ペプチドの細胞内送達剤。
〔5〕ペプチドがヒト細胞の細胞内に送達される、〔4〕の剤。
〔6〕ペプチドが癌細胞の細胞内に送達される、〔4〕または〔5〕の剤。
〔7〕ペプチド内包フェリチンの製造方法であって、
1)ペプチドの存在下または不在下において、フェリチンをpH3.0以下の緩衝液中で放置して、フェリチンを解離させること;および
2)解離したフェリチンおよびペプチドをpH5.0以上10.0以下の緩衝液中に共存させて、ペプチド内包フェリチンを生成すること;
を含み、
ペプチドが、3~19個のアミノ酸残基から構成され、かつ
下記条件:
a)-10.2≦X≦5.9、かつ445≦Y≦2524;
(ここで、XはpH9でのペプチドの電荷を示し、Yはペプチドの化学式量を示す)
を満たす、製造方法。
下記条件:
a)-10.2≦X≦5.9、かつ445≦Y≦2524;
(ここで、XはpH9でのペプチドの電荷を示し、Yはペプチドの化学式量を示す)
を満たす、ペプチド内包フェリチンを提供する。
a)-10.2≦X≦5.9、かつ445≦Y≦2524;
(ここで、XはpH9でのペプチドの電荷を示し、Yはペプチドの化学式量を示す)
pH5より高いpHの水溶液中でフェリチンは強く負に帯電する。そのため、フェリチンの内包に用いられる溶液のpH(例、pH9)では、中性から正に帯電した分子はフェリチンに内包され易く、強い負に帯電した分子はフェリチンに内包され難いと考えられる。そのため、-10.2>Xの強く負に帯電したペプチドはフェリチンとの電気的反撥により、フェリチンに内包され難いと考えられる。一方、-10.2≦Xのペプチドでは、ペプチド-フェリチン間の負電荷の反撥よりもフェリチンがかご状の超分子構造を形成する力の方が強いため、フェリチンに内包された可能性がある。
あまりにも強く正に帯電したペプチドは、電気的相互作用によりフェリチンの内外にペプチドが吸着し、フェリチンのカゴ状構造の形成を妨げ、内包されない可能性がある。また、強く正に帯電したペプチドは凝集しやすく、フェリチンに内包できないサイズの粒子を形成し、内包されない可能性もある。
化学式量があまりにも小さいペプチドは、フェリチンがかご状構造を形成している途中で、フェリチン内部から拡散により流出してしまい、内包されにくい可能性がある。
フェリチン内腔の直径は7nmであり、化学式量が大きいため、かさ高い分子はフェリチンに内包され難いと考えられる。
b)-10.2≦X≦0.0、かつ445≦Y≦2524、あるいはc)3.7≦X≦5.9、かつ445≦Y≦2524
化学式量がある程度大きく、あまり帯電していないペプチドは、ペプチド分子自体が凝集し、フェリチンに内包できないサイズの粒子を形成するため、フェリチンに内包され難いと考えられる。
(A1)配列番号1のアミノ酸配列を含むタンパク質;
(B1)配列番号1のアミノ酸配列において、アミノ酸残基の置換、欠失、挿入、および付加からなる群より選ばれる、1もしくは数個のアミノ酸残基の修飾を含むアミノ酸配列を含み、かつ、24量体形成能を有するタンパク質;または
(C1)配列番号1のアミノ酸配列に対して90%以上の同一性を有するアミノ酸配列を含み、かつ、24量体形成能を有するタンパク質。
(A2)配列番号2のアミノ酸配列を含むタンパク質;
(B2)配列番号2のアミノ酸配列において、アミノ酸残基の置換、欠失、挿入、および付加からなる群より選ばれる、1もしくは数個のアミノ酸残基の修飾を含むアミノ酸配列を含み、かつ、24量体形成能を有するタンパク質;または
(C2)配列番号2のアミノ酸配列に対して90%以上の同一性を有するアミノ酸配列を含み、かつ、24量体形成能を有するタンパク質。
1)pH3.0以下の緩衝液中にフェリチンを放置して、フェリチンを解離させること(脱会合プロセス);および
2)解離したフェリチンおよびペプチドをpH5.0以上10.0以下の緩衝液中に共存させて、ペプチド内包フェリチンを生成すること(再会合プロセス)。
ヒト由来フェリチンH鎖(FTH(配列番号1))をコードするDNAを全合成した。全合成されたDNAを鋳型として、5’-GAAGGAGATATACATATGACGACCGCGTCCACCTCG-3’(配列番号3)および5’-CTCGAATTCGGATCCTTAGCTTTCATTATCACTGTC-3’(配列番号4)をプライマーとしてPCRを行った。また、pET20(メルク社)を鋳型として、5’-TTTCATATGTATATCTCCTTCTTAAAGTTAAAC-3’(配列番号5)および5’-TTTGGATCCGAATTCGAGCTCCGTCG-3’(配列番号6)をプライマーとしてPCRを行った。各々得られたPCR産物をWizard DNA Clean-Up System(プロメガ社)で精製した後、In-Fusion HD Cloning Kit(タカラバイオ社)で、50℃、15分間のIn-Fusion酵素処理することで、FTHをコードする遺伝子が搭載された発現プラスミド(pET20-FTH)を構築した。
なお、pHの測定は、pH分析計(LAQUA、F-72、Horiba)とpH電極(9680S-10D)を用いて、25℃で行った。
フェリチンを用いたペプチド送達に向けて、蛍光色素フルオロセイン(FAM)で修飾されたペプチド(5(6)-FAM-RFARKGALRQKNVHEVKN(配列番号9)、PKC-F、化学式量2524、表3)が内包されたFTHの構築を試みた。
精製されたPKC-F内包FTHがカゴ状形状を示すことは、図4に示すように、3%りんタングステン酸染色による透過型電子顕微鏡(TEM)像によって確認した。この時のペプチド内包FTHの直径は12nmであり、天然型ヒトフェリチンと同じサイズであり、ペプチド内包により、フェリチンの高次構造が大きく損なわれないこと分かった。
得られたPKC-F内包FTHを用いて、フェリチンによるPKC-Fの細胞内への輸送性を評価した。
フェリチンを用いたペプチド送達の汎用性を調べるために、PKC-F以外のペプチドをフェリチンに内包させ細胞内への輸送を試みた。
得られたFAM-SV40内包FTHの細胞への取り込みを評価した。評価用培地(Opti-MEMTM(Thermo Fisher Scientific社)+1%非必須アミノ酸溶液(Thermo Fisher Scientific社)+1%ペニシリン-ストレプトマイシン(ナカライテスク社))にFAM-SV40内包FTHの終濃度が100nM(FAM-SV40濃度250nM)、200nM(FAM-SV40濃度500nM)あるいは400nM(FAM-SV40濃度1000nM)となるように各々添加された培地100μl中で、SKBR-3細胞(20,000 cell/well、96-well plate)に添加し、37℃で培養した。また、陰対照として、FTH内包されていないペプチドが終濃度250nM、500nMあるいは1000nMで添加された培地でSKBR-3細胞を同様に培養した。各々24時間培養後、リン酸緩衝生理食塩水100μlにて2回洗浄し、Trypsin-EDTA(Sigma-Aldrich社)50μl中で37℃、10分間放置した。
フェリチンに内包することで、目的のペプチドを、トランスフェリン受容体(TfR)提示細胞に特異的に送達できることを確認するために、TfRの発現量の異なる細胞株を用いて、FTHの取り込み効率のTfR依存性を評価した。
脱会合・再会合プロセスによってフェリチンに内包可能なペプチドの探索を行った。脱会合・再会合プロセスでは、終濃度5mg/mlのFTHと終濃度0.5mMのペプチドを含む50mM グリシン塩酸塩緩衝液(pH2.3)1mlを、室温で15分間放置した。その後、1Mのトリス塩酸塩緩衝液(pH9.0)310μlを加え中和し、3時間室温で放置した。放置後、50mMトリス塩酸塩緩衝液(pH8.0)1.2mlを加え、遠心分離(15,000rpm、1分間)した後、上清2.5mlを50mM トリス塩酸塩緩衝液(pH8)で平衡化された脱塩カラムPD-10(Sephadex G-25充填品、GEヘルスケア社)に供し、3.0mlの50mMトリス塩酸塩緩衝液(pH8.0)で溶出し、封入されなかったペプチドとフェリチンとを分離した。その溶液全量(3.0ml)をVivaspin 20-100K(GE healthcare社)を用いた遠心限外濾過にて0.1mlに濃縮した。その濃縮液に10mlの50mM トリス塩酸塩緩衝液を加え濃縮する操作を2回繰り返すことで、PD-10で除去しきれなかったペプチドを除去し、サンプル溶液0.1mlを得た。LC-MS分析のために、サンプル溶液50μlに1Mグリシン塩酸塩緩衝液(pH2.3)50μlを加え室温で15分間放置した。その溶液に900μlのエタノールを加え、激しく攪拌した後、遠心分離(15000rpm、5分間)により上清を回収した。その上清を分析した。今回、LC-MSとして、LCMS-2020(島津製作所)、カラムはInertsil(登録商標) ODS-3、粒子径2μm、2.1mmx50mm(GL science)を用いた。そして、カラムに供されたサンプル10μlを、溶液A(0.1%ぎ酸/99.9%アセトニトリル)と溶液B(50%水/50%アセトニトリル)の混合比が95対5から95対5となるように流速0.2ml/分、10分間かけて溶出させた。
今回、フェリチンに内包されたペプチドおよび内包できなかったペプチドについて、下記の各物性値とフェリチンへのペプチドの内包可否との相関関係を調べた。
(1)ペプチドの長さ(鎖長)
(2)ペプチドの化学式量
(3)疎水性度(Hydrophobicity)
(4)GRAVY
(5)平均親水性度(Average of hydrophilicity)
(6)ペプチドに占める親水性アミノ酸の割合(Ratio of hydrophilic residues/total number of residues)
(7)pH9におけるペプチドの電荷
ペプチドの長さは、ペプチドを構成するアミノ酸残基の総数に基づき決定した。
ペプチドの組成式に基づいて原子量と原子数の積の総和として決定した。
ペプチドの疎水性度(Hydrophobicity)は、SSRCalc Hydrophobicityに基づき算出した(O. V. Krokhin Anal. Chem.(2006),78(22)7785-7795)。今回、Prot pi(https://www.protpi.ch/Calculator/PeptideTool)を用いて、300オングストロームC18カラム、0.1%TFA溶出条件のデータベースを使用し、算出した。
GRAVY(grand average of hydropathy)は、各アミノ酸残基のハイドロパシー値(hydropathy score)を加算し、そして配列の長さで割ることによって計算した(J, Kyte and R. F.Doolittle, J Mol Biol. 1982 157(1) 105-32.)。
平均親水性度(Average of hydrophilicity)は、各アミノ酸残基の親水度値(hydrophilicity score)を加算し、そして配列の長さで割ることによって計算した(Hopp and Woods Proc Natl Acad Sci U S A. 1981 78(6) 3824-8.)。
ペプチドに占める親水性アミノ酸の割合(Ratio of hydrophilic residues/total number of residues)は、ペプチドを構成する全アミノ酸の内、親水性アミノ酸(H、C、T、S、K、Q、E、D、NおよびR)の占める割合を評価することにより決定した。
pH9におけるペプチドの電荷は、ペプチドを構成する各アミノ酸残基の側鎖、修飾基、N末端のアミノ基又はその保護基、C末端のカルボキシ基又はその保護基を含む全ての官能基の電荷について、各官能基の解離定数(pKa)と電荷の正負を各々用いてpH9として、以下の式を用いて算出した。
ヒト由来フェリチンL鎖(FTL(配列番号2))をコードするDNAを全合成した。全合成されたDNAを鋳型として、5’-GAAGGAGATATACATATGAGCTCCCAGATTCGTCAG-3’(配列番号7)および5’-CTCGAATTCGGATCCTTAGTCGTGCTTGAGAGTGAG-3’(配列番号8)をプライマーとしてPCRを行った。また、pET20(メルク社)を鋳型として、5’-TTTCATATGTATATCTCCTTCTTAAAGTTAAAC-3’(配列番号5)および5’-TTTGGATCCGAATTCGAGCTCCGTCG-3’(配列番号6)をプライマーとしてPCRを行った。各々得られたPCR産物をWizard DNA Clean-Up System(プロメガ社)で精製した後、In-Fusion HD Cloning Kit(タカラバイオ社)で、50℃、15分間のIn-Fusion酵素処理することで、FTLをコードする遺伝子が搭載された発現プラスミド(pET20-FTL)を構築した。
蛍光色素フルオロセイン(FAM)で修飾されたペプチド(5(6)-FAM-RFARKGALRQKNVHEVKN(配列番号9)、PKC-F、化学式量2524)が内包されたFTLを構築した。
Claims (6)
- ペプチドが、3~19個のアミノ酸残基から構成され、かつ
下記条件:
3.7≦X≦5.9、かつ445≦Y≦2524;
(ここで、XはpH9でのペプチドの電荷を示し、Yはペプチドの化学式量を示す)
を満たし、
ペプチドは、フェリチンを構成するフェリチン単量体のC末端に融合されていないペプチドである、
ペプチド内包フェリチン。 - ペプチドが4~16個のアミノ酸残基から構成される、請求項1記載のペプチド内包フェリチン。
- ペプチドの細胞内送達剤であって、
ペプチド内包フェリチンを含み、
ペプチドが、3~19個のアミノ酸残基から構成され、かつ
下記条件:
3.7≦X≦5.9、かつ445≦Y≦2524;
(ここで、XはpH9でのペプチドの電荷を示し、Yはペプチドの化学式量を示す)
を満たし、
ペプチドは、フェリチンを構成するフェリチン単量体のC末端に融合されていないペプチドである、
ペプチドの細胞内送達剤。 - ペプチドがヒト細胞の細胞内に送達される、請求項3記載の剤。
- ペプチドが癌細胞の細胞内に送達される、請求項3または4記載の剤。
- ペプチド内包フェリチンの製造方法であって、
1)ペプチドの存在下または不在下において、フェリチンをpH3.0以下の緩衝液中で放置して、フェリチンを解離させること;および
2)解離したフェリチンおよびペプチドをpH5.0以上10.0以下の緩衝液中に共存させて、ペプチド内包フェリチンを生成すること;
を含み、
ペプチドが、3~19個のアミノ酸残基から構成され、かつ
下記条件:
3.7≦X≦5.9、かつ445≦Y≦2524;
(ここで、XはpH9でのペプチドの電荷を示し、Yはペプチドの化学式量を示す)
を満たし、
ペプチドは、フェリチンを構成するフェリチン単量体のC末端に融合されていないペプチドである、
製造方法。
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| JP2019162119 | 2019-09-05 | ||
| JP2019162119 | 2019-09-05 | ||
| PCT/JP2020/033658 WO2021045210A1 (ja) | 2019-09-05 | 2020-09-04 | ペプチド内包フェリチン |
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| WO2015135597A1 (en) | 2014-03-12 | 2015-09-17 | Cic Nanogune - Asociación Centro De Investigación Cooperativa En Nanociencias | Uses and methods for delivery to the nucleus |
| CN106110333A (zh) | 2016-07-11 | 2016-11-16 | 中国科学院过程工程研究所 | 一种以铁蛋白为载体的抗肿瘤药物及其制备方法 |
| WO2018067075A1 (en) | 2016-10-07 | 2018-04-12 | National University Of Singapore | Compositions and methods for protein expression and delivery |
| WO2019163871A1 (ja) | 2018-02-21 | 2019-08-29 | 味の素株式会社 | 融合タンパク質 |
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| US4515736A (en) | 1983-05-12 | 1985-05-07 | The Regents Of The University Of California | Method for encapsulating materials into liposomes |
| WO2006126595A1 (ja) | 2005-05-27 | 2006-11-30 | Japan Science And Technology Agency | 機能性材料の三次元構造体 |
| JP4834788B2 (ja) * | 2009-05-21 | 2011-12-14 | パナソニック株式会社 | フェリチンの配置方法 |
| KR101604375B1 (ko) | 2013-02-08 | 2016-03-25 | 경북대학교 산학협력단 | 인간 페리틴 유래 융합폴리펩티드 |
| WO2017222398A1 (en) * | 2016-06-22 | 2017-12-28 | Cellis Sp. Z O.O. | Cellular targeted pharmaceutically active substance or label delivery system |
| EP3512563A1 (en) * | 2016-09-16 | 2019-07-24 | The Johns Hopkins University | Protein nanocages with enhanced mucus penetration for targeted tissue and intracellular delivery |
| JP7559558B2 (ja) * | 2018-10-29 | 2024-10-02 | 味の素株式会社 | 有機化合物封入フェリチンの製造方法 |
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| JP2009506107A (ja) | 2005-08-29 | 2009-02-12 | ヒールオア・リミテッド | 糖尿病および皮膚の老化を予防および治療するための方法および組成物 |
| WO2015135597A1 (en) | 2014-03-12 | 2015-09-17 | Cic Nanogune - Asociación Centro De Investigación Cooperativa En Nanociencias | Uses and methods for delivery to the nucleus |
| CN106110333A (zh) | 2016-07-11 | 2016-11-16 | 中国科学院过程工程研究所 | 一种以铁蛋白为载体的抗肿瘤药物及其制备方法 |
| WO2018067075A1 (en) | 2016-10-07 | 2018-04-12 | National University Of Singapore | Compositions and methods for protein expression and delivery |
| WO2019163871A1 (ja) | 2018-02-21 | 2019-08-29 | 味の素株式会社 | 融合タンパク質 |
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| CN114341156A (zh) | 2022-04-12 |
| JPWO2021045210A1 (ja) | 2021-03-11 |
| WO2021045210A1 (ja) | 2021-03-11 |
| EP4056233A1 (en) | 2022-09-14 |
| US20220401560A1 (en) | 2022-12-22 |
| EP4056233A4 (en) | 2023-09-06 |
| KR20220057542A (ko) | 2022-05-09 |
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