JP2006028032A - 磁性粒子含有医薬用原薬 - Google Patents
磁性粒子含有医薬用原薬 Download PDFInfo
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- 229910052749 magnesium Inorganic materials 0.000 claims description 2
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- 238000006243 chemical reaction Methods 0.000 abstract description 13
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 9
- 150000003839 salts Chemical class 0.000 abstract description 6
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- WTFXARWRTYJXII-UHFFFAOYSA-N iron(2+);iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[Fe+2].[Fe+3].[Fe+3] WTFXARWRTYJXII-UHFFFAOYSA-N 0.000 description 13
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- 230000002776 aggregation Effects 0.000 description 7
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- 238000009826 distribution Methods 0.000 description 5
- 230000005294 ferromagnetic effect Effects 0.000 description 5
- 229910021506 iron(II) hydroxide Inorganic materials 0.000 description 5
- NCNCGGDMXMBVIA-UHFFFAOYSA-L iron(ii) hydroxide Chemical compound [OH-].[OH-].[Fe+2] NCNCGGDMXMBVIA-UHFFFAOYSA-L 0.000 description 5
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- 150000002505 iron Chemical class 0.000 description 4
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- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 150000003904 phospholipids Chemical class 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
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- NMCUIPGRVMDVDB-UHFFFAOYSA-L iron dichloride Chemical compound Cl[Fe]Cl NMCUIPGRVMDVDB-UHFFFAOYSA-L 0.000 description 2
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 2
- 239000002609 medium Substances 0.000 description 2
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- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
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- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
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- Medicinal Preparation (AREA)
Abstract
【解決手段】 平均粒径が5〜30nmであり、飽和磁化が50〜90Am2/kg、保磁力が0〜1.6kA/mである磁性酸化鉄微粒子が単分散したコロイド無菌水溶液であることを特徴とする磁性粒子含有医薬用原薬は、微細な磁性酸化鉄粒子を生成した後、反応溶液から反応時に副生した水可溶性副生塩類を常法により水洗除去して超常磁性酸化鉄粒子のコロイド水溶液を精製し、精製したコロイド水溶液の分散媒を超純水で置換することによって得ることができる。
【選択図】 なし
Description
また、微細な磁性粒子は製薬造粒工程において、微粒子の集合状態を調整することにより造粒粒子に強磁性体の機能を付与することができる。
また、超微粒子であることで投与後は体内からの排泄を容易にすることができる。
本発明者は、鋭意研究を重ねた結果、磁性粒子として微細な磁性酸化鉄粒子の超常磁性に着目し、超常磁性酸化鉄粒子からなる単分散コロイド水溶液の分散安定条件を見出した。
従って、単分散している超常磁性酸化鉄粒子1個当たりの磁化値は当然小さく、粒子間の磁気凝集も外部磁界の影響も受け難く安定した分散状態を保つことができるのである。
変動係数(%)=(標準偏差)×100/(平均粒子径)
撹拌装置及び加熱装置を備えた5000mlの反応容器を用い、原料鉄塩と苛性ソーダは試薬特級を用い、また水はイオン交換水を用いた。
水溶液濃度0.5モルの塩化第一鉄水溶液500mlと、濃度0.5モルの塩化第二鉄水溶液1000mlを反応容器に投入し、撹拌して第一鉄と第二鉄塩の混合水溶液を調整した後、加熱昇温した。この混合鉄塩水溶液が80℃に昇温した時、予め準備した濃度1.0モルの苛性ソーダ水溶液2300mlを該混合水溶液に撹拌しながら添加した。添加が完了してから温度を80℃に保持して60分間撹拌をつづけた。生成物は磁石に感応する黒色を呈したコロイド水溶液であった。
ここに得たコロイド水溶液の一部を採取し、水洗ろ過したペーストを凍結乾燥して得られた粉末を分析した結果、平均粒子径が10nmのスピネル型結晶構造の粒子粉で、粒度分布の変動係数は7%であった。また、Fe2+含有量が17.5モル%の磁性酸化鉄粒子であり、磁気特性は飽和磁化σsが68Am2/kg、保磁力Hcが0.4kA/mの超常磁性酸化鉄粒子であった。
生成した黒色コロイド水溶液中には黒色コロイド粒子の合成反応で副生した可溶性塩が混在しているので、イオン交換水を用いてデカンテーション法により、副生塩を水洗除去することにより黒色コロイド水溶液を精製した。
生成物の物性を評価するために採取した残りの黒色コロイド水溶液から100mlを良く攪拌しながら採取し、該コロイド水溶液を遠心分離機を用いて固液分離して分散媒を除去した。その後、同量の超純水を注入して超音波分散機を用いて再分散した。これを1サイクルとして5サイクル繰り返し行いコロイド水溶液の分散媒を超純水に置換した。次に、該コロイド水溶液に超純水を加えてコロイド粒子濃度を22mg/mlに調整して超音波分散機で分散しながら0.1規定の苛性ソーダ水溶液を添加してゼータ電位を−55mvに調整した。60分後に超音波分散機を停止してコロイド水溶液を静置し、360分間放置した。
得られたコロイド水溶液には沈殿が生じていないこと、さらに表面磁束が100ガウスの永久磁石を用いて磁気凝集しないことを観測した。このコロイド水溶液は毒性検査及びエンドトキシン検査を行い、何れも陰性であることを確認して、超常磁性酸化鉄粒子の単分散コロイド無菌水溶液150mllを生成した。
得られたコロイド水溶液のpHは9.7、電気伝導度は210μSであった。
上記の工程(1)の超常磁性酸化鉄粒子の合成工程において、水溶液濃度が0.5モルの塩化第一鉄水溶液300mlと0.5モルの硫酸マグネシュウム水溶液200mlを用いた以外は、(2)及び(3)の各工程は共に実施例1と同じ条件で超常磁性酸化鉄粒子からなる濃度が20mg/mlの磁性粒子含有医薬用原薬を生成した。
得られたコロイド水溶液のpHは9.8、電気伝導度は240μSであった。
また、液媒が界面活性剤などを含有しない原薬であり、しかも、超微粒子であることで投与後は体内からの排泄を容易にすることができるので、人体に投与後の安全性及び代謝・排泄に関して何ら問題を生じない原薬を提供することができる。
Claims (5)
- 平均粒径が5〜30nmの磁性酸化鉄微粒子が単分散したコロイド無菌水溶液であることを特徴とする磁性粒子含有医薬用原薬。
- 磁性酸化鉄微粒子の飽和磁化が50〜90Am2/kg、保磁力が0〜1.6kA/mであることを特徴とする請求項1記載の磁性粒子含有医薬用原薬。
- 磁性酸化鉄微粒子がスピネル構造の組成物MOFe2O3(Mは2価金属)であることを特徴とする請求項1又は2に記載の磁性粒子含有医薬用原薬。
- 組成物MOFe2O3(Mは2価金属)のMが、Fe及び/又はMg(但し、FeとMgの総和がFe2O31モルに対して1モル以下)であることを特徴とする請求項3記載の磁性粒子含有医薬用原薬。
- コロイド無菌水溶液中の磁性酸化鉄微粒子の濃度が5〜50mg/mlであることを特徴とする請求項1〜4のいずれかに記載の磁性粒子含有医薬用原薬。
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2011062217A1 (ja) | 2009-11-20 | 2011-05-26 | 戸田工業株式会社 | 磁性酸化鉄微粒子粉末、磁性粒子含有水分散体およびその製造方法 |
JP2019137674A (ja) * | 2018-02-12 | 2019-08-22 | メガプロ バイオメディカル カンパニー リミテッド | 生体適合性磁性材料 |
US10661247B2 (en) | 2013-10-07 | 2020-05-26 | Dai-Ichi High Frequeny Co., Ltd. | Ferromagnetic-particle manufacturing apparatus |
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US10342989B2 (en) | 2013-09-20 | 2019-07-09 | Dai-Ichi High Frequency Co., Ltd. | Magnetic flux irradiation devices and components |
JP2016187364A (ja) | 2013-09-20 | 2016-11-04 | 第一高周波工業株式会社 | 磁束照射装置 |
AU2016226262B2 (en) | 2015-03-02 | 2020-05-07 | KAIO Therapy, LLC | Systems and methods for providing alternating magnetic field therapy |
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2004
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2011062217A1 (ja) | 2009-11-20 | 2011-05-26 | 戸田工業株式会社 | 磁性酸化鉄微粒子粉末、磁性粒子含有水分散体およびその製造方法 |
JP2011126876A (ja) * | 2009-11-20 | 2011-06-30 | Toda Kogyo Corp | 磁性酸化鉄微粒子粉末、磁性粒子含有水分散体およびその製造方法 |
US9127168B2 (en) | 2009-11-20 | 2015-09-08 | Toda Kogyo Corporation | Magnetic iron oxide fine particles, and magnetic particle-containing water dispersion and process for producing the same |
US10661247B2 (en) | 2013-10-07 | 2020-05-26 | Dai-Ichi High Frequeny Co., Ltd. | Ferromagnetic-particle manufacturing apparatus |
US10661248B2 (en) | 2013-10-07 | 2020-05-26 | Dai-Ichi High Frequency Co., Ltd. | Ferromagnetic-particle manufacturing apparatus |
JP2019137674A (ja) * | 2018-02-12 | 2019-08-22 | メガプロ バイオメディカル カンパニー リミテッド | 生体適合性磁性材料 |
JP7335472B2 (ja) | 2018-02-12 | 2023-08-30 | メガプロ バイオメディカル カンパニー リミテッド | 生体適合性磁性材料 |
US12268756B2 (en) | 2018-02-12 | 2025-04-08 | Megapro Biomedical Co. Ltd. | Biocompatible magnetic materials |
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