JP5008977B2 - 磁性ナノ粒子 - Google Patents
磁性ナノ粒子 Download PDFInfo
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- JP5008977B2 JP5008977B2 JP2006516378A JP2006516378A JP5008977B2 JP 5008977 B2 JP5008977 B2 JP 5008977B2 JP 2006516378 A JP2006516378 A JP 2006516378A JP 2006516378 A JP2006516378 A JP 2006516378A JP 5008977 B2 JP5008977 B2 JP 5008977B2
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Description
(a)配位子の硫化物誘導体を合成する段階と;
(b)粒子を製造するための還元剤の存在下で、硫化物誘導体配位子を、HAuCl4(テトラクロロ金酸)及び任意でコア内に鉄原子が存在する第二鉄塩と反応する段階と ;を備える。好適な鉄塩はFeCl3である。
不動態化金属、又は、不動態化金属及び磁気金属を備えたコアであって、複数の配位子に共有結合されたコアを有するここに規定したナノ粒子を、一又は二以上の候補化合物に接触させる段階と;
候補化合物が配位子に結合するか否かを検出する段階と;を備える。
Lex−GNP Ley−GNP STn−GNP
Glogo−H−GNP Gg3−GNP Gluco−GNP
Malto−GNP Lacto−GNP Man−GNP
ナノ粒子はコア粒子に結合した配位子に対して抗体応答を生ずるキャリアとして使用してもよい。これらの抗体は従来標準の技術を用いて変成できる。ここにはじめて例示するものと類似の抗体も公知の方法に関連してここに教示したものを用いて生成できる。これらの抗体を製造する方法は、ナノ粒子を用いてほ乳類(例えば、マウス、ラット、うさぎ、馬、やぎ、羊、又は猿)に免疫性を与える(免疫化する)ことを含む。抗体は従来公知の種々の技術のいずれを用いて、好ましくは抗体の対象の抗原への結合を用いることによってスクリーニングして免疫性が与えられた動物から得られてもよい。動物から、抗体及び/又は細胞生成抗体を分離することは、動物の犠牲の段階を伴ってもよい。
例1−Au−Feナノ粒子
配位子に共有結合した磁気糖ナノ粒子を合成する方法を見出した。例として、2つの重要なオリゴ糖のチオール誘導ネオ複合糖質1及び2、非抗原性二糖マルトース(Glcα(1→4)Glcβ1−OR)、及び、抗原性ラクトース(Galβ(1→4)Galβ1−OR)を、インサーチュー磁性ナノ粒子を機能化するように準備した(図3,スキーム1)。ジスルフィド1及び2の合成は、都合よく保護されたマルトース及びラクトース誘導体を、11-アセチルチオ-アンデカノール(11-acetylthio-undecanol)、11-アセチルチオ-3,6,9-トリオキサ-アンデカノール(11-acetylthio-3,6,9-trioxa-undecanol)のそれぞを用いてグリコシド化することによって実施した[12]。いずれのリンカーも、材料全体の特性における疎水性若しくは親水性の影響をテストするために用いられてきた。化合物1及び2はジスルフィドの形で分離し、金−鉄保護糖ナノ粒子の準備のためにこの形で用いた。水溶性糖ナノ粒子1−AuFe(マルト(malto)−AuFe)及び2−AuFe(ラクト−AuFe)はワンポット合成を用いてメタノール/水混合物において得た。1:4の比のFeCl3及びHAuCl4をジスルフィド1又は2の存在下でNaBH4を用いて還元した。金属コアをネオ複合糖質単層で保護することにより、高安定性でバイオ機能化ナノクラスターとなる。これらは遠心濾過によって精製され、1H−NMR、UV−vis、ICP、TEM、EDX及びSQUIDによってキャラクタライズされてきた。
マルトCu11SauFe:水(0.5mL)にFeCl3(2mg;0.013mmol;0.25当量)が溶解した溶液を、MeOH(11.5mL)にジスフフィド1(80mg;0.075mol;3当量)を溶解した溶液に入れ、次いで、水(2mL)にHauCl4(17mg;0.05mmol;1当量)が溶解した溶液を入れた。次いで、NaBH41M(52mg;1.38mmol;27.5当量)を高速撹拌しながら少量加えた。生成した黒い懸濁液をさらに2時間撹拌し、真空中で溶媒を除去した。糖ナノ粒子はMeOHで不溶性であるが、水には可溶である。
精製を遠心濾過によって実施した。粗生成物を水(〜15mL)NANOpureで溶解し、溶液を遠心濾過器(CENTRIPLUS YM30,MICROCON,MWCO=30000)内にロードし、遠心力(3000×g,40分)を印加した。黒っぽい糖ナノ粒子残留物をMeOH及び水で洗い、開始材料がもはや薄層クロマトグラフィ(TLC)で検出できなくなるまで複数回繰り返した。残留物を水に溶解し、複数回遠心力をかけて、不溶性材料を除去した。透明な溶液を凍結乾燥し、得られた生成物は塩及び開始材料がなかった(1H及び23NaNMRスペクトロスコピ−においてジスルフィド及びNa+からの信号がなかった)。
サンプルのTEM検査を200kV(フィリップス社のCM200マイクロスコープ)で実施した。Au/Fe糖ナノ粒子の水溶液の一滴(20μL)をカーボン膜で被覆された銅グリッド上に置いた。グリッドは室温で数時間空気中で乾燥した。Au/Feクラスターの粒子サイズ分布を、自動イメージアナライザーを用いて複数の顕微鏡写真から評価した。EDX分析は顕微鏡に取り付けたフィリップス社のDX4装置で実施した。ICP分析はPEC−009プロトコルに従ってアグルクエムS.L.によって実施した。UVスペクトルをUV/visパーキンエルマーラムダ12分光光度計によって得た。1H−NMRスペクトルはブルーカーDRX−500スペクトロメータによって得た。化学シフトをD2Oに対してppm(δ)で与えられている。
ICP:0.27%Fe
UV(H2O):λ=500nm、表面プラズモン共鳴1H−NMR(500MHz、D2O)δ:5.32(brd、1H、H−1’)、4.37(brd、1H、H−1)、4.00−3.30(m、13H)、2.70(s,2H,CH2S)、1.85−1.20(m、17H)
ICP:2.81%Fe
UV(H2O):λ=500nm、表面プラズモン共鳴1H−NMR(500MHz、D2O)δ:4.49(brd、1H、H−1’)、4.40(brd、1H、H−1)、4.10−3.30(m、23H)、2.92(m、0.5H)
異なる糖質分子の自己組織化単層(SAM)で安定化された水溶性金糖ナノ粒子(GNP)は、過剰なチオール誘導ネオ複合糖質の存在下で、水溶液中に金属塩前駆体の化学的還元によって準備した。サンプル準備手順では、出発として、金属クラスタが同時に保護されかつ有機分子で機能化された金GNPを生成するペナデらによるもの[11]、[19]を用いた。Au−S共有結合の形成は、その成長を妨害する金属クラスター(コア直径〜2nm)を分離し、溶液中においてナノクラスター上で大きな安定性を付与する。
四塩化金酸(HAuCl4、0.018mmol)及び過剰なジスルフィドネオ複合糖質(0.2mmol)の水溶液を質問で水素化ホウ素ナトリウム(NaBH4,22当量)で還元した。茶色の懸濁液が直ちに形成した。懸濁液を約2時間振り、次いで、溶媒を除去し、糖ナノ粒子(GNP)を水で洗いかつ遠心濾過(CENTRIPLUS、Mr30000、1時間、3000xg)することによって精製した。フィルタにおける残留物は水に溶解し、凍結乾燥した。GNPは透過型電子顕微鏡(TEM)、1HNMR、UV−可視スペクトロスコピー、導結合高周波プラズマ(ICP)、及び元素分析によってキャラクタライズした。TEM:平均直径;Au原子数、それぞれ1.5nm、79個。UV−VIS(H2O):λ=520nm。ICP:28%Au。(C23H43O11S)nAun(n=79)について計算した元素分析:C 38.18;H 5.98;S 4.40;Au 27.18。見つかった:C 39.5;H 6.07;Au 28.0。
金糖ナノ粒子(GNP)はGd(III)及び他のランタノイドに複合されて新しいコントラスト剤を提供する。GNPに存在するネオ複合糖質配位子(60から100分子)はキレート部分である。
ここに記載した参考文献はすべて参考として組み込まれている。
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Claims (24)
- 金及び鉄を含む複合体である金属原子のコアを有する磁性ナノ粒子であって、前記コアにおける前記鉄原子に対する前記金原子の比が5:0.1から5:1であり、前記コアが複数の配位子に共有結合し、少なくとも1つの前記配位子は糖質基を備え、前記コアに結合している前記少なくとも1つの配位子が、ジスルフィド基を含むリンカー基によって前記コアに共有結合している磁性ナノ粒子。
- 前記ナノ粒子の前記コアが5nm以下の平均直径を有する請求項1に記載の磁性ナノ粒子。
- 少なくとも1つの前記配位子がランタニドを組み込んでいる請求項1または2に記載の磁性ナノ粒子。
- 前記ランタニドがガドリニウムである請求項3に記載の磁性ナノ粒子。
- ナノ粒子がNMR活性原子を備えた請求項1から4のいずれか一項に記載の磁性ナノ粒子。
- 前記NMR活性原子が、Mn+2,Gd+3,Eu+2,Cu+2,V+2,Co+2,Ni+2,Fe+2,Fe+2,又はランタノイド+3である請求項5に記載の磁性ナノ粒子。
- 前記糖質基は多糖、オリゴ糖、又は、単糖の基を備えた請求項1に記載の磁性ナノ粒子。
- 少なくとも1つの前記配位子はグリカノコンジュゲートを備えた請求項1から7のいずれか一項に記載の磁性ナノ粒子。
- 前記グリカノコンジュゲートが糖脂質又は糖タンパク質である請求項8に記載の磁性ナノ粒子。
- ナノ粒子がラベルを備えた請求項1から9のいずれか一項に記載の磁性ナノ粒子。
- 前記ラベルは蛍光性基、放射性同位元素又はNMR活性原子である請求項10に記載の磁性ナノ粒子。
- 少なくとも1つの前記配位子がペプチド又はタンパク質を備えた請求項1から11のいずれか一項に記載の磁性ナノ粒子。
- 少なくとも1つの前記配位子が核酸分子を備えた請求項1から12のいずれか一項に記載の磁性ナノ粒子。
- 前記核酸分子がDNA又はRNA分子、あるいはsiRNA又はmiRNA配位子である請求項13に記載の磁性ナノ粒子。
- 前記ナノ粒子が薬剤活性コンポーネントを備えた請求項1から14のいずれか一項に記載の磁性ナノ粒子。
- 前記コアが少なくとも20個の配位子と結合している請求項1から15のいずれか一項に記載の磁性ナノ粒子。
- 前記コアが少なくとも50個の配位子と結合している請求項16に記載の磁性ナノ粒子。
- 前記ナノ粒子が水溶性である請求項1から17のいずれか一項に記載の磁性ナノ粒子。
- 複数の種類の配位子基を備えた請求項1から18のいずれか一項に記載の磁性ナノ粒子。
- 請求項1から19のいずれか一項に記載の一又は二以上のナノ粒子の集団を備えた組成物。
- 異なる配位子基を有する複数のナノ粒子を備えた請求項20に記載の組成物。
- 治療で用いるものであって、請求項1から21のいずれか一項に記載の一又は二以上のナノ粒子の集団を備えた組成物。
- 前記組成物がコロイドである請求項20から22のいずれか一項に記載の組成物。
- 前記ナノ粒子が2nm以下の平均直径を有し、且つ/又はコロイドである前記組成物が少なくとも1年間安定である請求項23に記載のコロイドである組成物。
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| PCT/GB2004/002408 WO2004108165A2 (en) | 2003-06-09 | 2004-06-07 | Magnetic nanoparticles linked to a lingand |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102243058A (zh) * | 2011-04-15 | 2011-11-16 | 中国船舶重工集团公司第七○二研究所 | 应变传感器灵敏度系数的标定装置和方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE487496T1 (de) | 2010-11-15 |
| ES2441235T3 (es) | 2014-02-03 |
| HK1168051A1 (en) | 2012-12-21 |
| EP2277548B1 (en) | 2013-01-16 |
| DE602004030003D1 (de) | 2010-12-23 |
| JP2006527245A (ja) | 2006-11-30 |
| WO2004108165A3 (en) | 2005-06-16 |
| WO2004108165A2 (en) | 2004-12-16 |
| ES2355728T3 (es) | 2011-03-30 |
| DK1631318T3 (da) | 2011-02-21 |
| AU2004244811B2 (en) | 2008-02-07 |
| AU2004244811B9 (en) | 2008-04-24 |
| EP2277548A3 (en) | 2011-04-27 |
| ES2401957T3 (es) | 2013-04-25 |
| US20140107738A1 (en) | 2014-04-17 |
| EP2486944B1 (en) | 2013-12-04 |
| US20060233712A1 (en) | 2006-10-19 |
| EP1631318A2 (en) | 2006-03-08 |
| US8557607B2 (en) | 2013-10-15 |
| CA2528460A1 (en) | 2004-12-16 |
| EP2277548A2 (en) | 2011-01-26 |
| CA2528460C (en) | 2012-10-30 |
| GB0313259D0 (en) | 2003-07-16 |
| EP2486944A1 (en) | 2012-08-15 |
| AU2004244811A1 (en) | 2004-12-16 |
| EP1631318B1 (en) | 2010-11-10 |
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