Formation of high-axial-ratio-microstructures from natural and synthetic sphingolipids
摘要:
Amphiphiles that form high-axial-ratio-microstructures (HARMs) are being considered as novel materials for controlled release of drugs and other biologically functional molecules. HARMs consisting of tubules, ribbons, solid rods and helices are formed from sphingolipids by addition of water to a solution of amphiphile in DMF. Single molecular species of galactocerebroside (GalCer) containing long unsaturated fatty acid chains or natural GalCer containing mixed-length, non-hydroxy fatty acids (NFA-GalCer) or alpha-hydroxy fatty acids (HFA-GalCer) form cylindrical structures. In contrast, single molecular species of GalCer containing long saturated fatty acids form ribbons and helices. GalCer HARMs are typically under 100 nm in diameter and have lengths of several microns. The importance of the amide of GalCer for HARM formation was evaluated using psychosine, which forms solid fibers, whereas sphingosine and an analog of GalCer in which the amide is reduced to a secondary amine form amorphous aggregates. Single molecular species of ceramide containing long unsaturated fatty acid chains form cylindrical structures, whereas those with long saturated fatty acids form ribbons and helices. Short chain saturated ceramide also forms cylindrical structures. GalCer analogs with N-acetyl-glycine in place of the galactose form fibers whereas those with N-acetyl-proline yield amorphous material. The N-acetyl-proline-containing amphiphile can de doped into pure GalCer or NFA-GalCer without perturbing tubule formation. (C) 1997 Elsevier Science Ireland Ltd.
Formation of high-axial-ratio-microstructures from natural and synthetic sphingolipids
摘要:
Amphiphiles that form high-axial-ratio-microstructures (HARMs) are being considered as novel materials for controlled release of drugs and other biologically functional molecules. HARMs consisting of tubules, ribbons, solid rods and helices are formed from sphingolipids by addition of water to a solution of amphiphile in DMF. Single molecular species of galactocerebroside (GalCer) containing long unsaturated fatty acid chains or natural GalCer containing mixed-length, non-hydroxy fatty acids (NFA-GalCer) or alpha-hydroxy fatty acids (HFA-GalCer) form cylindrical structures. In contrast, single molecular species of GalCer containing long saturated fatty acids form ribbons and helices. GalCer HARMs are typically under 100 nm in diameter and have lengths of several microns. The importance of the amide of GalCer for HARM formation was evaluated using psychosine, which forms solid fibers, whereas sphingosine and an analog of GalCer in which the amide is reduced to a secondary amine form amorphous aggregates. Single molecular species of ceramide containing long unsaturated fatty acid chains form cylindrical structures, whereas those with long saturated fatty acids form ribbons and helices. Short chain saturated ceramide also forms cylindrical structures. GalCer analogs with N-acetyl-glycine in place of the galactose form fibers whereas those with N-acetyl-proline yield amorphous material. The N-acetyl-proline-containing amphiphile can de doped into pure GalCer or NFA-GalCer without perturbing tubule formation. (C) 1997 Elsevier Science Ireland Ltd.
Anti-inflammatory and immunomodulatory amino acid derivatives, their preparation and use
申请人:——
公开号:US20040242663A1
公开(公告)日:2004-12-02
The present invention ralates to compounds of formula (I): wherein R is hydrogen (H) or C
1-6
alkyl; and X is defined such that —NH—(X)—COOH is the residue of an amino acid, which amino acid may itself optionally be substituted at any pendant amino group thereof by a residue of a carboxylic acid or a derivative thereof; or a salt thereof. The use of these compounds, in particular as potential anti-inflammatory and immunomodulatory drugs, and their preparation are described.
1
ANTI-INFLAMMATORY AND IMMUNOMODULATORY AMINO ACID DERIVATIVES, THEIR PREPARATION AND USE
申请人:CRODA INTERNATIONAL plc
公开号:EP1389180A1
公开(公告)日:2004-02-18
US6956059B2
申请人:——
公开号:US6956059B2
公开(公告)日:2005-10-18
[EN] ANTI-INFLAMMATORY AND IMMUNOMODULATORY AMINO ACID DERIVATIVES, THEIR PREPARATION AND USE<br/>[FR] DERIVES D'ACIDES AMINES ANTI-INFLAMMATOIRES ET IMMUNOMODULATEURS, LEUR PREPARATION ET LEUR UTILISATION
申请人:CRODA INT PLC
公开号:WO2002094764A1
公开(公告)日:2002-11-28
The present invention ralates to compounds of formula (I): wherein R is hydrogen (H) or c1-6 alkyl; and X is defined such that - NH - (X) - COOH is the residue of an amino acid, which amino acid may itself optionally be substituted at any pendant amino group thereof by a residue of a carboxylic acid or a derivative thereof; or a salt thereof. The use of these compounds, in particular as potential anti-inflammatory and immunomodulatory drugs, and their preparation are described.
Formation of high-axial-ratio-microstructures from natural and synthetic sphingolipids
作者:Alex S Goldstein、Anatoly N Lukyanov、Paul A Carlson、Paul Yager、Michael H Gelb
DOI:10.1016/s0009-3084(97)00042-x
日期:1997.8
Amphiphiles that form high-axial-ratio-microstructures (HARMs) are being considered as novel materials for controlled release of drugs and other biologically functional molecules. HARMs consisting of tubules, ribbons, solid rods and helices are formed from sphingolipids by addition of water to a solution of amphiphile in DMF. Single molecular species of galactocerebroside (GalCer) containing long unsaturated fatty acid chains or natural GalCer containing mixed-length, non-hydroxy fatty acids (NFA-GalCer) or alpha-hydroxy fatty acids (HFA-GalCer) form cylindrical structures. In contrast, single molecular species of GalCer containing long saturated fatty acids form ribbons and helices. GalCer HARMs are typically under 100 nm in diameter and have lengths of several microns. The importance of the amide of GalCer for HARM formation was evaluated using psychosine, which forms solid fibers, whereas sphingosine and an analog of GalCer in which the amide is reduced to a secondary amine form amorphous aggregates. Single molecular species of ceramide containing long unsaturated fatty acid chains form cylindrical structures, whereas those with long saturated fatty acids form ribbons and helices. Short chain saturated ceramide also forms cylindrical structures. GalCer analogs with N-acetyl-glycine in place of the galactose form fibers whereas those with N-acetyl-proline yield amorphous material. The N-acetyl-proline-containing amphiphile can de doped into pure GalCer or NFA-GalCer without perturbing tubule formation. (C) 1997 Elsevier Science Ireland Ltd.