Synthesis and bioassay of β-(1,4)-D-mannans as potential agents against Alzheimer's disease
作者:Ru-wei Jiang、Xiao-guang Du、Xuan Zhang、Xin Wang、Ding-yu Hu、Tao Meng、Yue-lei Chen、Mei-yu Geng、Jing-kang Shen
DOI:10.1038/aps.2013.104
日期:2013.12
Oligomannurarate 971 derived from a marine plant has shown neuroprotective effects. In this study we synthesized a series of truncated derivatives of the oligosaccharide, and investigated the effect of these derivatives against Aβ peptide toxicity in vitro. The sulfoxide method was applied to synthesize the derivatives. SH-SY5Y human neuroblastoma cells were treated with Aβ1-40 (2 μmol/L), and the cell viability was detected using a CCK8 assay. A series of β-(1,4)-D-mannosyl oligosaccharide, ranging from the disaccharide to the hexasaccharide, were synthesized. Addition of 10 μmol/L β-(1,4)-D-mannobiose 6, β-(1,4)-D-mannotriose 9 or β-(1,4)-D-mannotetraose 12 in SH-SY5Y cells significantly attenuated Aβ1-40-induced toxicity. The efficacies were similar to those caused by 10 μmol/L oligomannurarate 971 or alzhemed. Other oligosaccharides including oligomaltoses and oligocelluloses were less active. Synthetic homogeneous short chain β-(1,4)-D-mannans shows neuroprotective effect against Aβ peptide toxicity similar to that of heterogeneous oligomannurarate 971 and alzhemed.
来源于海洋植物的低聚甘露糖酸盐971显示出神经保护效果。在本研究中,我们合成了一系列低聚糖的截短衍生物,并研究了这些衍生物对Aβ肽毒性的抑制作用。采用亚磺酸方法合成了这些衍生物。用Aβ1-40(2 μmol/L)处理SH-SY5Y人神经母细胞瘤细胞,并通过CCK8检测细胞活力。合成了一系列β-(1,4)-D-甘露糖低聚糖,范围从二糖到六糖。在SH-SY5Y细胞中添加10 μmol/L β-(1,4)-D-甘露二糖6、β-(1,4)-D-甘露三糖9或β-(1,4)-D-甘露四糖12显著减轻了Aβ1-40诱导的毒性。这些效果与10 μmol/L低聚甘露糖酸盐971或阿尔兹海默药物的效果相似。其他低聚糖如低聚麦芽糖和低聚纤维素的活性较低。合成的均匀短链β-(1,4)-D-甘露糖表现出对Aβ肽毒性的神经保护效果,类似于非均匀的低聚甘露糖酸盐971和阿尔兹海默药物。