Arabinomannan-containing glycolipids, relevant to the mycobacterial cell-wall component lipoarabinomannan, were synthesized by chemical methods. The glycolipids were presented with tri- and tetrasaccharide arabinomannans as the sugar portion and a double alkyl chain as the lyophilic portion. Following synthesis, systematic biological and biophysical studies were undertaken in order to identify the effects of the glycolipids during mycobacterium growth. The studies included mycobacterial growth, biofilm formation and motility assays. From the studies, it was observed that the synthetic glycolipid with higher arabinan residues inhibited the mycobacterial growth, lessened the biofilm formation and impaired the motility of mycobacteria. A surface plasmon resonance study involving the immobilized glycan surface and the mycobacterial crude lysates as analytes showed specificities of the interactions. Further, it was found that cell lysates from motile bacteria bound oligosaccharide with higher affinity than non-motile bacteria.
通过
化学方法合成了与霉菌细胞壁成分脂质阿拉伯
甘露聚糖相关的含阿拉伯
甘露聚糖的
糖脂。
糖脂的糖部分为三糖和四糖阿拉伯
甘露聚糖,冻干部分为双烷基链。合成后,进行了系统的
生物和
生物物理研究,以确定
糖脂在分枝杆菌生长过程中的作用。研究包括分枝杆菌生长、
生物膜形成和运动试验。研究发现,阿拉伯聚糖残基含量较高的合成
糖脂可抑制分枝杆菌的生长,减少
生物膜的形成,并损害分枝杆菌的运动能力。一项涉及固定化聚糖表面和作为分析物的分枝杆菌粗裂解物的表面等离子体共振研究显示了相互作用的特异性。此外,研究还发现,与非运动性细菌相比,运动性细菌的细胞裂解物与
寡糖的结合亲和力更高。