Lipid composition containing a liquid crystal structure
申请人:Takasago International Corporation
公开号:EP1166769A1
公开(公告)日:2002-01-02
This invention relates to a novel lipid composition for use in cosmetics capable of increasing moisture-keeping ability or barrier function of the stratum corneum, protecting the skin and improving dry or rough skin, and to products which use the same, such as cosmetics and medicaments. Particularly, it relates to a lipid composition which comprises at least one component (A) selected from the group consisting of a 2-acylaminoalkane-1,3-diol and optically active compounds thereof, at least one component (B) selected from the group consisting of a 2-acylaminoalkane-1,3-diol in which at least one of the α-position and β-position of the acyl group is substituted with hydroxyl group and optically active compounds thereof and at least one component (C) selected from sterols, wherein the components (A), (B) and (C) are mixed at a ratio that constructs a liquid crystal structure, and to products which contain the lipid composition, such as cosmetics and medicaments.
Keratin fiber strengthening agent and method for strengthening keratin fiber
申请人:Takasago International Corporation
公开号:EP0920852B1
公开(公告)日:2005-06-01
US6379659B1
申请人:——
公开号:US6379659B1
公开(公告)日:2002-04-30
US6528074B2
申请人:——
公开号:US6528074B2
公开(公告)日:2003-03-04
Synthesis, NMR characterization and divergent biological actions of 2′-hydroxy-ceramide/dihydroceramide stereoisomers in MCF7 cells
作者:Zdzislaw M. Szulc、Aiping Bai、Jacek Bielawski、Nalini Mayroo、Doreen E. Miller、Hanna Gracz、Yusuf A. Hannun、Alicja Bielawska
DOI:10.1016/j.bmc.2010.08.050
日期:2010.11
straightforward method for the simultaneous preparation of (2S,3R,2′R)- and (2S,3R,2′S)-2′-hydroxy-ceramides (2′-OHCer) from (2S,3R)-sphingosine acetonide precursors and racemic mixtures of 2-hydroxy fatty acids (2-OHFAs) is described. The obtained 2′-OH-C4-, -C6-, -C12-, -C16-Cer and 2′-OH-C6-dhCer pairs of diastereoisomers were characterized thoroughly by TLC, MS, NMR, and optical rotation. Dynamic and multidimensional
用于同时制备的简单方法(2小号,3 - [R,2' - [R )-和(2小号,3 - [R,2'小号)-2'-羟基神经酰胺从(2'- OHCer)(2小号, 3 - [R)-鞘氨醇丙酮前体和 2-羟基脂肪酸 (2-OHFA) 的外消旋混合物进行了描述。获得的 2'-OH-C4-、-C6-、-C12-、-C16-Cer 和 2'-OH-C6-dhCer 对非对映异构体通过 TLC、MS、NMR 和旋光度进行了彻底表征。动态和多维 NMR 研究提供的证据表明,2'-OHCers 的极性界面比在相应的非羟基化类似物中观察到的更扩展和更刚性。对于 (2' R )- 和 (2' S )-2'-OH-C6-Cers 及其二氢类似物,观察到 MCF7 细胞生长抑制的立体特异性特征。(2' R )-异构体比 (2' S )-异构体更具活性(IC 50 ∼3 μM/8 μM 和 IC 50分别为 ∼8 μM/12