A series of mono, bis and mixed Schiff bases (1-7) were synthesised and evaluated for potential anti-glycation
and anti-oxidant activities using the bovine serum albumin - glucose assay and 2,2-diphenyl-1-picrylhydrazyl (DPPH) free
radical assay respectively. All compounds showed significant (p < 0.05) antiglycating activities with IC50 values (4.02
x10-24 ± 0.1 – 2.88 x 10-1 ± 1.35 mM) which were lower than the standard positive control aminoguanidine (IC50 : 1.51 x
10-3 ± 2.11 mM). Moreover, compounds 1-7 were found to possess significant (p < 0.05) DPPH radical scavenging properties
with SC50 values (1.31 x 10-19 ± 0.05 to 2.25 x 10-1 ± 1.24 mM) lower than the standard ascorbic acid (SC50 : 5.50 x
10-3 ± 2.11 mM). Compound 6 was found to be the most potent anti-glycating molecule (IC50 value: 4.02 x10-24 ± 0.1
mM) while compound 5 was the most potent anti-oxidant molecule (SC50: 1.31 x 10-19 ± 0.05 mM); both being significantly
lower (p < 0.05) than the respective positive controls used. The present data showed that the number of phenolic
OH together with structural changes influence both the anti-glycation and anti-oxidant observed herein. This study provides
for the first time a series of potential template molecules for possible pharmaceutical applications that warrant further
investigation as potential anti-glycation and anti-oxidant agents which could be of importance in metabolic diseases
including diabetes mellitus.
合成了一系列单席夫碱基、双席夫碱基和混合席夫碱基(1-7),并分别使用
牛血清白蛋白-
葡萄糖测定法和 2,2
-二苯基-1-苦基
肼(
DPPH)自由基测定法对其潜在的抗糖化和抗氧化活性进行了评估。所有化合物都显示出明显的抗糖化活性(p < 0.05),其 IC50 值(4.02 x10-24 ± 0.1 - 2.88 x 10-1 ± 1.35 mM)均低于标准阳性对照氨基胍(IC50:1.51 x 10-3 ± 2.11 mM)。此外,还发现化合物 1-7 具有显著的 DPPH 自由基清除特性(p < 0.05),其 SC50 值(1.31 x 10-19 ± 0.05 至 2.25 x 10-1 ± 1.24 mM)低于标准抗坏血酸(SC50:5.50 x 10-3 ± 2.11 mM)。发现化合物 6 是最有效的抗糖化分子(IC50 值:4.02 x10-24 ± 0.1 mM),而化合物 5 则是最有效的抗氧化分子(SC50:1.31 x 10-19 ± 0.05 mM);二者均显著低于(p < 0.05)所用的相应阳性对照。本研究数据表明,酚羟基的数量和结构变化会影响所观察到的抗糖化和抗氧化作用。本研究首次提供了一系列可能用于制药的潜在模板分子,这些分子作为潜在的抗糖化和
抗氧化剂值得进一步研究,它们对包括糖尿病在内的代谢性疾病可能具有重要意义。