Design, Synthesis, Biological Evaluation and Inhibition Mechanism of 3-/4-Alkoxy Phenylethylidenethiosemicarbazides as New, Potent and Safe Tyrosinase Inhibitors
作者:Senchuan Song、Yuliang Mai、Huahong Shi、Bing Liao、Fei Wang
DOI:10.1248/cpb.c19-00949
日期:2020.4.1
Tyrosinase plays important roles in many different disease related processes, and the development of its inhibitors is particularly important in biotechnology. In this study, thirty-nine 3-/4-alkoxyphenylethylidenethiosemicarbazides were synthesized as novel tyrosinase inhibitors based on structure-based molecular design. Our experimental results demonstrated that thirty-one of them possess remarkable tyrosinase inhibitory activities with IC50 value below 1 µM, and 5a, 6e, 6g and 6t did not display any toxicity to 293T cell line at the concentration of 1000 µmol/L. According to the inhibitory activities, several compounds were selected for detail investigation on the structure–activity relationships (SARs), mechanisms of enzyme inhibition, inhibitory kinetics and cytotoxicity. In particular, the interaction between the selected inhibitors and the active center of tyrosinase was considered and discussed in detail based on their structural characteristics. Taken together, the results presented here demonstrated that the newly designed compounds are promising candidates for the treatment of tyrosinase-related disorders and further development of them may have significant contribution in biomedical science.
酪氨酸酶在多种与疾病相关的过程中扮演重要角色,其抑制剂的研发在生物技术领域尤为重要。本研究基于结构导向的分子设计,合成了39种新颖的3-/4-烷氧基苯乙烯基二唑半卡巴唑类化合物作为酪氨酸酶抑制剂。我们的实验结果显示,其中31种化合物的酪氨酸酶抑制活性显著,IC50值低于1µM,且5a、6e、6g和6t在1000µmol/L浓度下对293T细胞系无毒性。根据抑制活性,选取了若干化合物详细研究了构效关系、酶抑制机制、抑制动力学及细胞毒性。特别是,基于这些化合物的结构特征,详细考虑并讨论了所选抑制剂与酪氨酸酶活性中心的相互作用。综上所述,本研究结果表明,新设计的化合物是治疗与酪氨酸酶相关疾病的潜在候选药物,其进一步开发可能对生物医学科学产生重大贡献。