Glucosamine-glycerophospholipids That Activate Cell-Matrix Adhesion and Migration
摘要:
Two new analogues derived from the platelet activating factor (PAF), containing glucosamine instead of the acetyl group, were synthesized, and their effect on the human keratinocyte cell line HaCaT was evaluated with respect to cytotoxicity, proliferation, adhesion, and migration. Starting with (R)-1,2-isopropylideneglycerol (3), the glycosylation acceptor 1-O-octadecyl-3-O-tert-butyldimethylsilyl-sn-glycerol (6) was synthesized in three steps. Glycosylation of 6 with the already known O-(3,4,6-tri-O-acetyl-2-deoxy-2-dimethylmaleimido-beta-D-glycopyranosyl)trichloracetimidate gave 1-O-octadecyl-2-O-(3',4',6'-tri-O-acetyl-2'-deoxy-2'-dimethylmaleimido-beta-D-glucopyranosyl)-3-O-tert-butyldimethylsilyl-sn-glycerol (7). After removing the (tert-butyldimethyl)silyl (TBDMS) group with FeCl3 center dot 6H(2)O, phosphoryl choline was introduced, yielding [1-O-octadecyl-2-O-(2'-deoxy-2'-dimethylmaleimido-beta-D-glucopyranosyl)-sn-glycero(3)]phosphorylcholine (2) (glucosimide-PAF). pH controlled cleavage of the amino protection group gave [1-O-octadecyl-2-O-(2'-deoxy-2'-amino-beta-D-glucopyranosyl)-sn-glycero(3)]phosphorylcholine hydrochloride (1) (glucosamine-PAF). 2 inhibited proliferation of HaCaT cells by 26% at nontoxic concentrations, while 1 increased the proliferation rate by 30% at low concentrations. At higher concentrations, both compounds showed cytotoxic properties with LD50 = 30 mu mol/L (1) and LD50 = 5-6 mu mol/L (2). Both 1 and 2 were potent promoters of cell adhesion and migration of HaCaT cells.
Chemoenzymatic synthesis of a focused library of enantiopure structured 1-O-alkyl-2,3-diacyl-sn-glycerol type ether lipids
作者:Carlos D. Magnusson、Anna V. Gudmundsdottir、Gudmundur G. Haraldsson
DOI:10.1016/j.tet.2011.01.032
日期:2011.3
A highly efficient two-step chemoenzymatic synthesis of enantiopure structured ether lipids of the 1-O-alkyl-2,3-diacyl-sn-glycerol type has been developed. Chimyl, batyl and selachyl alcohols possessing pure saturated fatty acid (SFA) attached to the sn-3 position and pure EPA and DHA attached to the sn-2 position were obtained under full regiocontrol. This was offered by mild conditions and a highly
已经开发了1- O-烷基-2,3-二酰基-sn-甘油类型的对映纯结构化醚脂质的高效两步化学酶法合成。在完全区域控制下,获得了具有附接到sn -3位置的纯饱和脂肪酸(SFA)和附接到sn -2位置的纯EPA和DHA的Chimyl,batyl和selachyl醇。这是由温和条件和在室温下运行的高效脂肪酶提供的。高分辨率11 H NMR光谱法用于监测反应的进程,并通过跟踪参与这些反应的所有预期加合物来评估所涉及反应的完全区域控制。这扩展为针对C 2 -C 16的所有偶数SFA以及八个相应的EPA和DHA结构化的二酰基甘油醚(DAGE)产品(用于chimyl,batyl和selachyl醇)的八个单酰基中间加合物的重点文库的制备。总共72种化合物。
D and L etherlipid stereoisomers and liposomes
申请人:Elan Pharmaceuticals, Inc.
公开号:US06667053B1
公开(公告)日:2003-12-23
A liposome having a lipid bilayer, where the lipid bilayer includes either the L or D stereoisomer of an ether lipid or a non-equal mixture of both. Most preferably the liposome also comprises (a) an underivatized phosphatidylcholine; (b) a sterol; (c) about 5-20 mole % of a phosphatidylethanolamine linked to a dicarboxylic acid at the ethanolamine group of the phosphatidylethanolamine, and (d) greater than about 10 mole % to less than about 30 mole % of either the L or D stereoisomer of an ether lipid. The liposome may be used as an anti-cancer or anti-inflammatory agent.
A series of sesterterpenoid bioconjugates with phospholipids and polyunsaturated fatty acids (PUFAs) have been synthesized for biological activity testing as antiproliferative agents in several cancer cell lines. Different substitution analogues of the original lipidic ether edelfosine (1-O-octadecyl-2-O-methyl-rac-glycero-3-phosphocholine) are obtained varying the sesterterpenoid in position 1 or
[EN] PHOSPHOLIPID COMPOUNDS AND USES THEREOF<br/>[FR] COMPOSÉS PHOSPHOLIPIDIQUES ET LEURS UTILISATIONS
申请人:GILEAD SCIENCES INC
公开号:WO2022046631A1
公开(公告)日:2022-03-03
Compounds and methods of using said compounds, singly or in combination with additional agents, and pharmaceutical compositions of said compounds for the treatment of viral infections are disclosed (Formula (I)).
Raspailynes, Novel Long-Chain Acetylenic Enol Ethers of Glycerol from the Marine SpongesRaspailia pumila andRaspailia ramosa
作者:Graziano Guella、Ines Mancini、Francesco Pietra
DOI:10.1002/hlca.19870700417
日期:1987.7.8
The spongesRaspailiapumila and ramosa (Demospongiae, Tetractinomorpha, Axinellida) from the North-East Atlantic are shown to contain a series of novel long-chain enolethers of glycerol where the enolether CC bond is conjugated, in sequence, to both an acetylenic and an olefinic bond. Polar extracts give raspailynes hydroxylated at their (1Z5Z)-1,5-alkadien-3-ynyl chain, like raspailyne Al ( = (+)-(S)-3-[((1Z