Carnosic acid (CA) is the main phenolic diterpene of rosemary (Rosmarinus officinalis L., Lamiaceae) and presents gastroprotective effect in vitro and in vivo. To determine structure-activity relationships, seventeen esters and ethers of CA were prepared, comprising aliphatic, aromatic, and heterocyclic compounds. The naturally occurring 12-O-methylcarnosic acid (14) was also included in the study. The compounds were evaluated for their gastroprotective activity in the HCl/EtOH-induced gastric lesions model in mice, and for cytotoxicity in human adenocarcinoma AGS cells, Hep G2 hepatocellular carcinoma cells, and human lung fibroblasts. At 10 mg/kg, some of the CA derivatives (5, 8, 9, 12, 14, and 18) were more effective preventing gastric lesions than the reference compound lansoprazole at the same dose. The dibenzoate 9, diindoleacetate 12, and the derivative 18 showed the best gastroprotective effect combined with the lowest cytotoxicity.
迷迭香酸(Carnosic acid,CA)是迷迭香(Rosmarinus officinalis L.,唇形科)的主要
酚类二萜,在体外和体内具有胃保护作用。为了确定结构-活性关系,研究人员制备了 17 种 CA 的
酯类和
醚类化合物,包括脂肪族、芳香族和杂环族化合物。研究还包括天然存在的 12-O-甲基卡诺酸(14)。研究评估了这些化合物在 HCl/EtOH 诱导的小鼠胃损伤模型中的胃保护活性,以及在人腺癌 AGS 细胞、Hep G2 肝癌细胞和人肺成纤维细胞中的细胞毒性。在 10 毫克/千克的剂量下,一些 CA 衍
生物(5、8、9、12、14 和 18)比相同剂量的参考化合物
兰索拉唑更有效地防止胃部病变。二
苯甲酸酯 9、二
吲哚乙酸酯 12 和衍
生物 18 显示出最佳的胃保护效果和最低的细胞毒性。