合成非天然类似物,含有 (S)-3-羟基十四烷酰基部分代替相应的天然 (R)-异构体,脂质 A 及其生物合成前体,指定前体 Ia 或脂质 IVA,已通过我们最近开发的程序。(S)-3-羟基十四烷酸是通过使用脂肪酶和随后的分级重结晶通过光学拆分从其外消旋体制备的。脂质 A 的 (S)-酰基类似物表现出比相应的天然脂质 A 稍强的白细胞介素 6 诱导活性,生物合成前体的 (S)-酰基类似物在抑制白细胞介素 6 诱导方面的活性远高于天然前体。白细胞介素-6 脂多糖。
Synthesis of an analog of a biosyntheticprecursor of lipid A containing four (S)-3-hydroxytetradecanoic acids was effected via an improved synthetic route to investigate the relationship between the bioactivity and the chirality of the 3-hydroxy fatty acid residues in lipid A. The S-analog inhibited endotoxin-induced interleukin-6 (IL-6) production from human peripheral whole blood cells more strongly
Synthetic Chemistry and Function of Bacterial Cell Surface Glycoconjugates
作者:Shoichi Kusumoto、Koichi Fukase、Masato Oikawa、Yasuo Suda
DOI:10.1002/jccs.200200071
日期:2002.8
Typical bacterialglycoconjugates are known to stimulate immunological systems of higher animals and thereby play important roles in the primary defense of animals against bacterial infection. Lipopolysaccharide (LPS) of gram-negative bacteria is a representative of such glycoconjugates. LPS was first discovered as a potent bacterial toxin and named endotoxin but was soon found to exhibit immunostimulating
已知典型的细菌糖缀合物可刺激高等动物的免疫系统,从而在动物抵御细菌感染的初级防御中发挥重要作用。革兰氏阴性菌的脂多糖 (LPS) 是此类糖缀合物的代表。LPS 最初是作为一种有效的细菌毒素被发现并命名为内毒素,但很快就被发现表现出免疫刺激活性。通过使用我们合成的纯制剂,LPS 的亲脂性部分结构(称为脂质 A)被证明是负责 LPS 的内毒素和免疫刺激活性的活性实体。本文介绍了我们最近对脂质 A 和相关化合物的化学合成和功能研究。描述了其各种结构类似物的合成,