Cinnamic acid amides from Tribulus terrestris displaying uncompetitive α-glucosidase inhibition
作者:Yeong Hun Song、Dae Wook Kim、Marcus J. Curtis-Long、Chanin Park、Minky Son、Jeong Yoon Kim、Heung Joo Yuk、Keun Woo Lee、Ki Hun Park
DOI:10.1016/j.ejmech.2016.02.044
日期:2016.5
active ingredients are unknown. This study attempted to isolate the responsible metabolites and elucidate their inhibition mechanism of α-glucosidase. By fractionating T. terristris extracts, three cinnamic acid amide derivatives (1–3) were ascertained to be active components against α-glucosidase. The lead structure, N-trans-coumaroyltyramine 1, showed significant inhibition of α-glucosidase (IC50 = 0
reported藜提取物具有抑制α-葡萄糖苷酶的潜力,但至今尚无有效成分的信息。这项研究试图分离负责的代谢产物,并阐明其对α-葡萄糖苷酶的抑制机制。通过分馏T. terristris提取物,三肉桂酸酰胺衍生物(1 - 3)中确定具有对抗α葡糖苷酶的活性组分。引线结构,ñ -反式-coumaroyltyramine 1,表明α葡萄糖苷酶的抑制显著(IC 50 = 0.42μM)。此外,所有活性化合物均显示出非竞争性的抑制机制,很少有关于α-葡萄糖苷酶抑制剂的报道。通过显示K m和V max以及K ik / K iv之比在1.029至1.053之间的降低,充分证明了该动力学行为。我们进行了研究,以研究如何对铅结构进行化学修饰1可能会影响抑制。肉桂酸酰胺的A环中的α,β-不饱和羰基和羟基已成为抑制α-葡糖苷酶的关键功能。分子模型研究表明,抑制活性与酶和抑制剂之间的π-π相互作用以及氢键相互作用密切相关。