In vitro absorption and lipid-lowering activity of baicalin esters synthesized by whole-cell catalyzed esterification
作者:Mengmeng Zhang、Xuan Xin、Guanglei Zhao、Yucong Zou、Xiao-Feng Li
DOI:10.1016/j.bioorg.2022.105628
日期:2022.3
Baicalin, a phenolic glycoside with good lipid-lowering activity, has poor intestinal absorption due to low lipophilicity. In this study, six ester derivatives of baicalin, named BECn (n = 2, 3, 4, 6, 8, and 10) based on their fatty chain lengths, were synthesized by whole-cell catalyzed esterification to improve lipophilicity, and the intestinal absorption and lipid-lowering activity of the synthesized
黄芩苷是一种具有良好降脂活性的酚苷,由于亲脂性低,肠道吸收差。 本研究通过全细胞催化酯化合成了六种黄芩苷酯衍生物,根据其脂肪链长度命名为 BEC n ( n = 2, 3, 4, 6, 8, and 10),以提高亲脂性。使用体外细胞模型研究了合成酯的肠道吸收和降脂活性。BEC2、BEC3 和 BEC4 表现出更高的P appCaco-2 细胞单层中的值高于黄芩苷。在肝脂肪变性、脂肪细胞和泡沫巨噬细胞的细胞模型中,这三种酯类的降脂活性均强于黄芩苷,这归因于它们在细胞内具有更高的蓄积性和对肉碱棕榈酰转移酶 1A 的直接激活作用更强。此外,这些酯类易被羧酸酯酶水解,在pH 7.4时不稳定,大大削弱了它们的吸收和降脂活性。该研究为BAI酯的工业化生产和实际应用奠定了基础。