Andersson J, Melchers F, Galanos C, Lüderitz O
J Exp Med. 1973 Apr 1;137(4):943-53. doi: 10.1084/jem.137.4.943.
Lipopolysaccharides with different structure, isolated from different mutant strains of Escherichia coli and Salmonella bacteria, and chemical degradation products of these lipopolysaccharides have been employed to investigate which part of the lipopolysaccharide molecule exerts mitogenic effects on bone marrow-derived mouse lymphocytes. Within the structure of lipopolysaccharide consisting of lipid A, a core polysaccharide, and the O-polysaccharide antigen, lipid A was found to be the mitogenic part. The mitogenic effect of lipid A, consisting of phosphorylated glucosamine disaccharide units with ester- and amide-linked fatty acids, was lost after alkali treatment, which removes ester-linked fatty acids. Insertion of the lipid A portion of lipopolysaccharides into the lipid bilayer of the plasma membranes of bone marrow-derived lymphocytes is discussed as the initial mitogenic action.
从大肠杆菌和沙门氏菌的不同突变菌株中分离出的具有不同结构的脂多糖,以及这些脂多糖的化学降解产物,已被用于研究脂多糖分子的哪一部分对源自骨髓的小鼠淋巴细胞发挥促有丝分裂作用。在由脂质A、核心多糖和O-多糖抗原组成的脂多糖结构中,发现脂质A是具有促有丝分裂作用的部分。由带有酯键和酰胺键连接脂肪酸的磷酸化葡糖胺二糖单元组成的脂质A的促有丝分裂作用,在碱处理后消失,碱处理会去除酯键连接的脂肪酸。有人讨论了将脂多糖的脂质A部分插入源自骨髓的淋巴细胞质膜的脂质双层中是最初的促有丝分裂作用。