JP6084294B2 - 磁気共鳴造影剤 - Google Patents
磁気共鳴造影剤 Download PDFInfo
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- JP6084294B2 JP6084294B2 JP2015532910A JP2015532910A JP6084294B2 JP 6084294 B2 JP6084294 B2 JP 6084294B2 JP 2015532910 A JP2015532910 A JP 2015532910A JP 2015532910 A JP2015532910 A JP 2015532910A JP 6084294 B2 JP6084294 B2 JP 6084294B2
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Images
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K49/00—Preparations for testing in vivo
- A61K49/06—Nuclear magnetic resonance [NMR] contrast preparations; Magnetic resonance imaging [MRI] contrast preparations
- A61K49/08—Nuclear magnetic resonance [NMR] contrast preparations; Magnetic resonance imaging [MRI] contrast preparations characterised by the carrier
- A61K49/10—Organic compounds
- A61K49/101—Organic compounds the carrier being a complex-forming compound able to form MRI-active complexes with paramagnetic metals
- A61K49/106—Organic compounds the carrier being a complex-forming compound able to form MRI-active complexes with paramagnetic metals the complex-forming compound being cyclic, e.g. DOTA
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K49/00—Preparations for testing in vivo
- A61K49/06—Nuclear magnetic resonance [NMR] contrast preparations; Magnetic resonance imaging [MRI] contrast preparations
- A61K49/18—Nuclear magnetic resonance [NMR] contrast preparations; Magnetic resonance imaging [MRI] contrast preparations characterised by a special physical form, e.g. emulsions, microcapsules, liposomes
- A61K49/1818—Nuclear magnetic resonance [NMR] contrast preparations; Magnetic resonance imaging [MRI] contrast preparations characterised by a special physical form, e.g. emulsions, microcapsules, liposomes particles, e.g. uncoated or non-functionalised microparticles or nanoparticles
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- Health & Medical Sciences (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Epidemiology (AREA)
- Radiology & Medical Imaging (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Nanotechnology (AREA)
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Description
項1 ポルフィリン鉄(III)錯体及び/又は該ポルフィリン鉄(III)錯体によって修飾された化合物を含む磁気共鳴造影剤。
項2 ポルフィリン鉄(III)錯体が、下記式(1)にて示される化合物又はその誘導体である、項1に記載の磁気共鳴造影剤
R1〜R8は、同一又は異なって、水素原子、カルボキシル基、アセチル基、アミノ基、チオール基、スルホ基、スルホニル基、ホスフィニル基、ホスフィノ基、ホスホノ基;末端にカルボキシル基、アセチル基、アミノ基、チオール基、スルホ基、スルホニル基、ホスフィニル基、ホスフィノ基、若しくはホスホノ基を有していてもよい、低級アルキル基、低級アルコキシ基、又は低級アルキレン基である。)。
項3 ポルフィリン鉄(III)錯体がβーヘマチン又はその誘導体である、項1又は2に記載の磁気共鳴造影剤。
項4 ポルフィリン鉄(III)錯体が結晶である、項1〜3の何れか1項に記載の磁気共鳴造影剤。
項5 前記結晶の粒子径分布が、5nm〜3μmである、項4に記載の磁気共鳴造影剤。項6 前記結晶の粒子径分布が、50nm〜1.5μmである、項4又は5に記載の磁気共鳴造影剤。
項7 項1〜6
の何れか1項に記載の磁気共鳴造影剤を含む磁気共鳴造影キット。
項8 項1〜6の何れか1項に記載の磁気共鳴造影剤が投与された被検体に対して、励起磁場パルスを印加することにより磁気共鳴信号を取得する工程を含む磁気共鳴撮像方法。
本発明の磁気共鳴造影剤はポルフィリン鉄(III)錯体及び/又は該ポルフィリン鉄(III)錯体によって修飾された化合物を有効成分として含む。
上述の外用固形剤には、例えば外用散剤等が含まれる。上述の外用液剤には、例えばリニメント剤、ローション剤等が含まれる。上述のスプレー剤には、例えば外用エアゾール剤、ポンプスプレー剤等が含まれる。上述の貼付剤には、例えばテープ剤、パップ剤等が含まれる。
本発明のキットは、上述の磁気共鳴造影剤を含む磁気共鳴造影用に用いられるキットである。
本発明の磁気共鳴撮像方法は、上述の磁気共鳴造影剤が投与された被検体に対して、励起磁場パルスを印加することにより磁気共鳴信号を取得する工程を含む方法である。
上述した100mgの合成ヘモゾインの投与を行った。投与したマウスの、投与直前、投与から1日後、及び投与から4週間後に腹部付近をMRI装置にて磁気共鳴撮影した。使用したMRI装置はBruker AVANCEII 500WBであり、T2強調モードの条件下にて磁気共鳴撮像を行った。また、対照実験として、上述の合成ヘモゾインに代えて、従来用いられている肝臓造影剤であるリゾビスト(富士フイルムRIファーマ(株))を、同様に投与した。これらの結果を図2に示す。
上述のマウスの背部に、上述の合成ヘモゾインを100mg皮下投与した。投与後1日及び4週間後に、投与した部位を切開し、その様子を観察した。その写真像を図3に示す。
上述の合成ヘモゾインをPBS中に分散させて、ファントムを作製した。対照実験用に、Saline(生理食塩水)及びPBSを準備した。
上述のマウスの背部に、合成ヘモゾインを皮下投与した。投与した合成ヘモゾインの粒子径分布は500〜1000nmのものを用いた。投与したマウスを、投与直後、投与から1週間後、及び投与から4週間後に胸部付近を上述のMRI装置を用い、T2強調モードの条件下にて磁気共鳴撮影した。結果を図5に示す。
C57BLマウスから採取したマクロファージに上述の合成ヘモゾインを10mg混合して、5%CO2、37℃の環境下にて12時間インキュベートし、合成ヘモゾインをマクロファージに貪食させた。次いで、貪食させたマクロファージを、106細胞/mlの濃度でPBS中に分散させて、ファントムを作製した。対照実験用に、合成ヘモゾイン貪食させなかったマクロファージを含むファントム及びSalineを準備した。
Claims (5)
- 結晶のβ−ヘマチンを含む磁気共鳴造影剤。
- 前記結晶の粒子径分布が5nm〜3μmである、請求項1に記載の磁気共鳴造影剤。
- 前記結晶の粒子径分布が、50nm〜1.5μmである、請求項2に記載の磁気共鳴造影剤。
- 請求項1〜3の何れか1項に記載の磁気共鳴造影剤を含む磁気共鳴造影キット
- 請求項1〜3の何れか1項に記載の磁気共鳴造影剤が投与された被検体に対して、励起磁場パルスを印加することにより磁気共鳴信号を取得する工程を含む磁気共鳴撮像方法。
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JPH03284629A (ja) * | 1990-03-30 | 1991-12-16 | Sakai Chem Ind Co Ltd | Mri用造影剤 |
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