The identification of naturally occurring labdane diterpenoid calcaratarin D as a potential anti-inflammatory agent
作者:Quy T.N. Tran、W.S. Fred Wong、Christina L.L. Chai
DOI:10.1016/j.ejmech.2019.04.023
日期:2019.7
of inflammation. The structure-activity relationships (SARs) pertaining to the labdane scaffold were elucidated and results suggest that an α-alkylidene-β-hydroxy-γ-butyrolactone system is necessary for potent activity in the labdanes. Our studies identified the natural product calcaratarin D (1) as a promising anti-inflammatory agent, which effectively modulates the production of pro-inflammatory mediators
在这项研究中,我们首次报告了通过立体和区域选择性醇醛缩合与(S)-β-羟基-γ-丁内酯作为关键步骤合成天然产物钙caratarinD 。还开发了一系列结构上相关的正戊二烯二萜的简洁合成路线(10个步骤以下),并在体外炎症模型中评估了它们的抗炎活性。阐明了与拉丹烷支架有关的结构-活性关系(SAR),结果表明,α-亚烷基-β-羟基-γ-丁内酯体系对于拉丹烷的有效活性是必需的。我们的研究确定了天然产物降钙素D(1作为一种有前途的抗炎药,可以有效地在转录和翻译水平上调节促炎性介质(例如TNF-α,IL-6,NO)的产生。这些抑制作用很可能是通过减少p65核易位而不是其磷酸化或蛋白表达来抑制核因子kappa B(NF-κB)活化而发生的。Calcaratarin d显示出NF-κB活化比穿心莲内酯的显著更大的抑制,从半日花烷家族公知的NF-κB抑制剂,这表明正常-构型的拉丹烷环或在C-3和C-19位