Comparison of a Pair of Synthetic Tea‐Catechin‐Derived Epimers: Synthesis, Antifolate Activity, and Tyrosinase‐Mediated Activation in Melanoma
作者:Magalí Sáez‐Ayala、Luis Sánchez‐del‐Campo、María F. Montenegro、Soledad Chazarra、Alberto Tárraga、Juan Cabezas‐Herrera、José Neptuno Rodríguez‐López
DOI:10.1002/cmdc.201000482
日期:2011.3.7
Despite bioavailability issues, tea catechins have emerged as promising chemopreventive agents because of their efficacy in various animal models. We synthesized two catechin‐derived compounds, 3‐O‐(3,4,5‐trimethoxybenzoyl)‐(−)‐catechin (TMCG) and 3‐O‐(3,4,5‐trimethoxybenzoyl)‐(−)‐epicatechin (TMECG), in an attempt to improve the stability and cellular absorption of tea polyphenols. The antiproliferative
尽管存在生物利用度问题,但由于茶儿茶素在多种动物模型中的功效,它们已成为有前途的化学预防剂。我们合成了两种儿茶素衍生的化合物3- O-(3,4,5-三甲氧基苯甲酰基)-(-)-儿茶素(TMCG)和3- O-(3,4,5-三甲氧基苯甲酰基)-(-)-表儿茶素(TMECG),旨在提高茶多酚的稳定性和细胞吸收性。在各种癌细胞系统中分析了这两种化合物的抗增殖和促凋亡活性,并且容易合成且产率高的TMCG在黑色素瘤和非黑色素瘤细胞系中的活性均高于TMECG。TMCG还是更好的二氢叶酸还原酶抑制剂,并被酪氨酸酶更有效地氧化,可能解释了这些差向异构体之间的活性差异。