3-Fluoro- and 3,3-Difluoro-3,4-dideoxy-KRN7000 Analogues as New Potent Immunostimulator Agents: Total Synthesis and Biological Evaluation in Human Invariant Natural Killer T Cells and Mice
摘要:
We propose here the synthesis and biological evaluation of 0 3,4-dideoxy-GalCer derivatives. The absence of the 3- and 4-hydroxyls on the sphingoid base is combined with the introduction of mono or difluoro substituent at C3 (analogues 8 and 9, respectively) to evaluate their effect on the stability of the ternary CD1d/GalCer/TCR complex which strongly modulate the immune responses. Biological evaluations were performed in vitro on human cells and in vivo in mice and results discussed with support of modeling studies. The fluoro 3,4-dideoxy-GalCer analogues appears as partial agonists compared to KRN7000 for iNKT cell activation, inducing T(H)1 or T(H)2 biases that strongly depend of the mode of antigen presentation, including human vs mouse differences. We evidenced that if a sole fluorine atom is not able to balance the loss of the 3-OH, the presence of a difluorine group at C3 of the sphingosine can significantly restore human iNKT activation.
The present invention provides an adjuvant-polymer construct comprising a polymer backbone which is covalently linked to 3 or more adjuvants, wherein the 3 or more adjuvants are each present in a pendant side chain, the adjuvants being connected to the polymer backbone either directly or via a spacer group.
Novel synthetic C-glycolipids, their synthesis and use to treat infections, cancer and autoimmune diseases
申请人:Tsuji Moriya
公开号:US20050222048A1
公开(公告)日:2005-10-06
The invention is directed to novel compounds of formulae (I), (II) and (III):
wherein X is O or NH;
R
3
is OH or a monosaccharide and R
4
is hydrogen, or R
3
is hydrogen and R
4
is OH or a monosaccharide;
R
5
is hydrogen or a monosaccharide; and pharmaceutically acceptable salts or esters thereof. The invention is also directed to the use of the compounds both directly and as immune adjuvants for treating cancer, infectious diseases and autoimmune diseases. The invention is also directed to syntheses of the intermediates which can be used to make these novel compounds.
Use of synthetic glycolipids as universal adjuvants for vaccines against cancer and infectious diseases
申请人:Tsuji Moriya
公开号:US20050192248A1
公开(公告)日:2005-09-01
The present invention relates to methods and compositions for augmenting an immunogenicity of an antigen in a mammal, comprising administering said antigen together with an adjuvant composition that includes a synthetic glycolipid compound of Formula I, as described herein. According to the present invention, the use of a compound of Formula I as an adjuvant is attributed at least in part to the enhancement and/or extension of antigen-specific Th1-type responses, in particular, CD8+ T cell responses. The methods and compositions of the present invention can be useful for prophylaxis and treatment of various infectious and neoplastic diseases.
本发明涉及一种增强哺乳动物体内抗原免疫原性的方法和组合物,包括将所述抗原与包含本文所述的化学合成糖脂化合物 Formula I 的佐剂组合物一起给予。根据本发明,将 Formula I 化合物用作佐剂,至少部分归因于增强和/或延长特异性 Th1 类型反应,特别是 CD8+ T 细胞反应。本发明的方法和组合物可用于预防和治疗各种传染性和肿瘤性疾病。
Diastereoselective epoxidation of the double bond at C-4 of sphingosines to provide phytosphingosine relatives such as α-galactosylceramide KRN7000
作者:Hirosato Takikawa、Shin-etsu Muto、Kenji Mori
DOI:10.1016/s0040-4020(98)00065-9
日期:1998.3
(CH2)7Me or (CH2)12Me] was studied. Dimethyldioxirane was found to be the best oxidant for that purpose. Application of this epoxidation resulted in a new synthesis of the α-galactosylceramide KRN7000 (2), which has an enhancing effect on the activity of natural killer cells.
Synthesis of C6′′-modified α-C-GalCer analogues as mouse and human iNKT cell agonists
作者:Joren Guillaume、Toshiyuki Seki、Tine Decruy、Koen Venken、Dirk Elewaut、Moriya Tsuji、Serge Van Calenbergh
DOI:10.1039/c7ob00081b
日期:——
α-GalCer analogues that combine known Th1 polarizing C6′′-modifications with a C-glycosidic linkage were synthesized and evaluated as iNKT cell antigens.