Synthesis of α-galactosyl ceramide and the related glycolipids for evaluation of their activities on mouse splenocytes
摘要:
Phytosphingosine and its short-chain analog were efficiently synthesized with 19% overall yield in 10 steps, respectively, starting from an inexpensive D-lyxose. Galactosyl donors of sulfide and phosphite types bearing benzoyl protecting groups of 4- and 6OH underwent glycosylation in excellent alpha-anomeric selectivity. A variety of alpha-galactosyl, fucosyl and glucosyl ceramides and serine-type lipids were prepared, and their activities involved in the proliferation of mouse splenocytes and the expression of cytokines were elucidated. Besides alpha-galactosyl ceramides, a galactosyl serine-type lipid also exhibited substantial effect on the expression of cytokines IFN-gamma and IL-4. (C) 2004 Elsevier Ltd. All rights reserved.
HUMAN iNKT CELL ACTIVATION USING GLYCOLIPIDS WITH ALTERED GLYCOSYL GROUPS
申请人:Academia Sinica
公开号:US20150071960A1
公开(公告)日:2015-03-12
Glycosphingolipids (GSLs) bearing α-glucose (α-Glc) that preferentially stimulate human invariant NKT (iNKT) cells are provided. GSLs with α-glucose (α-Glc) that exhibit stronger induction in humans (but weaker in mice) of cytokines and chemokines and expansion and/or activation of immune cells than those with α-galactose (α-Gal) are disclosed. GSLs bearing α-glucose (α-Glc) and derivatives of α-Glc with F at the 4 and/or 6 positions are provided. Methods for iNKT-independent induction of chemokines by the GSL with α-Glc and derivatives thereof are disclosed. Methods for immune stimulation in humans using GSLs with α-Glc and derivatives thereof are provided.
Practical Total Synthesis of (2<i>S</i>,3<i>S</i>,4<i>R</i>)-1-<i>O</i>-(<i>α</i>-<scp>D</scp>-Galactopyranosyl)-<i>N</i>-hexacosanoyl-2-amino-1,3,4-octadecanetriol, the Antitumorial and Immunostimulatory<i>α</i>-Galactosylcer-amide, KRN7000
A practical total synthesis of (2S,3S,4R)-l-O-(α-d-galactopyranosyl)-N-hexacosanoyl-2-amino-l,3,4-octadecanetriol (KRN7000), an antitumorial and immunostimulatory glycosphingolipid derived from agelasphins, was achieved in 14 steps starting fromd-lyxose in a 16% overall yield.
HEPATITIS C VIRUS INHIBITOR COMPRISING ALPHA-GLYCOSYLCERAMIDE AS THE ACTIVE INGREDIENT
申请人:KIRIN BEER KABUSHIKI KAISHA
公开号:EP1541153A1
公开(公告)日:2005-06-15
This invention provides a growth inhibitor of human hepatitis C virus comprising, as an active ingredient, α-glycosylceramide used for patients infected with the aforementioned viruses. This inhibitor of hepatitis C virus comprises, as an active ingredient, a compound represented by formula (I) or a salt or solvate thereof.
An improved synthesis of dansylated α-galactosylceramide and its use as a fluorescent probe for the monitoring of glycolipid uptake by cells
作者:Janice M.H. Cheng、Stephanie H. Chee、Deborah A. Knight、Hans Acha-Orbea、Ian F. Hermans、Mattie S.M. Timmer、Bridget L. Stocker
DOI:10.1016/j.carres.2011.02.014
日期:2011.5
A highly efficient synthesis of the biologically important fluorescent probe dansyl alpha-GalCer is presented. Key in our strategy is the incorporation of the fluorescent dansyl group at an early stage in the synthesis to facilitate in the monitoring and purification of intermediates via TLC and flash column chromatography, respectively, and the use of a high yielding alpha-selective glycosylation reaction between the phytosphingosine lipid and a galactosyl iodide donor. The ability of dansyl alpha-GalCer to activate iNKT cells and to serve as a fluorescent marker for the uptake of glycolipid by dendritic cells is also presented. (C) 2011 Elsevier Ltd. All rights reserved.
A concise route to phytosphingosine from lyxose
作者:Chun-Cheng Lin、Gang-Ting Fan、Jim-Min Fang
DOI:10.1016/s0040-4039(03)01281-4
日期:2003.7
Phytosphingosine was synthesized from the commercially available D-2,3-O-isopropylidene-D-lyxofuranose in 28% overall yield by a six-step procedure. This procedure is expedient and flexible for introduction of other lipid moieties on the phytosphingosine structure to make a variety of derivatives that can support the further exploration of their related biological functions. (C) 2003 Published by Elsevier Science Ltd.