Influence of Indomethacin and Isopropanol on Hydrophobic Interaction through Long-Chain Alkyl Groups of Hydrophobically-Modified Hydroxypropyl Methylcellulose
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概要
- 論文の詳細を見る
The hydrophobic interaction between long-chain alkyl groups of hydrophobically-modified hydroxypropyl methylcellulose (HM-HPMC) and indomethacin (IM) was studied using a fluorescence probe method in which pyrene molecules are allowed to associate with long-chain alkyl groups. In an HM-HPMS solutin, the hydrophobicity of the pyrene environment markedly increased as the concentration of HM-HPMS was increased, indicating an increase of hydrophobic interaction between the long-chain alkyl groups. When IM was added to this solution, the hydrophobicity of the pyrene environment decreased as the IM concentration increased. Thus, it was suggested that the hydrophobic interaction between long-chain alkyl groups and IM caused a weakening of the hydrophobic interaction between HM-HPMC molecules themselves.When isopropanol (IPA) was added to an HM-HPMC solution, IPA weakened the hydrophobic interaction through long-chain alkyl groups. Thus, IPA caused an expansion of the intermolecular hydrophobic regions. For this reason, the amount of IM entrapped in these regions increased when the IPA concentration was increased. However, when the IPA concentration was further increased, the hydrophobic interaction finally disappeared. Thus, as IM molecules could no longer be trapped in the hydrophobic regions, the activity of HM-HPMC suppressing the growth of IM crystals disappeared.
- 社団法人日本薬学会の論文
- 1995-06-15
著者
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尾熊 隆嘉
塩野義製薬株式会社 新薬研究所
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尾熊 隆嘉
Faculty Of Pharmaceutical Sciences University Of Tokyo
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高岸 靖
塩野義製薬新薬研究所
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高岸 靖
Developmental Research Laboratories Shionogi & Co. Ltd.
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斎藤 泉
Developmental Research Laboratories Shionogi & Co. Ltd.
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Oguma T
Developmental Research Laboratories Shionogi & Co. Ltd.
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池田 かおり
Developmental Research Laboratories, Shionogi & Co., Ltd.,
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尾熊 隆嘉
Developmental Research Labotatories, Shionogi & Co., Ltd.,
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Oguma Takayoshi
Developmental Research Laboratories Shionogi & Co. Ltd.
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Takagishi Y
Developmental Research Laboratories Shionogi & Co. Ltd.
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池田 かおり
Developmental Research Laboratories Shionogi & Co. Ltd.
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Saitoh I
Shionogi & Co. Ltd. Hyogo Jpn
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尾熊 隆嘉
Developmental Research Labotatories Shionogi & Co. Ltd.
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斎藤 泉
Development Research Laboratories, Shionogi & Co., Ltd.,
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