作者:Shu-Ting Chung、Pei-Yu Chien、Wen-Hsin Huang、Chen-Wen Yao、An-Rong Lee
DOI:10.1248/cpb.c13-00897
日期:——
A series of novel flavones derivatives were synthesized based on modification of the active ingredients of a traditional Chinese medicine Scutellaria baicalensis GEORGI and screened for anti-influenza activity. The synthetic baicalein (flavone) analogs, especially with the B-rings substituted with bromine atoms, were much more potent than oseltamivir or ribavirin against H1N1 Tamiflu-resistant (H1N1 TR) virus and usually with more favorable selectivity. The most promising were 5b, 5c, 6b and 6c, all displaying an 50% effective concentration (EC50) at around 4.0–4.5 µM, and a selective index (SI=50% cytotoxic concentration (CC50)/EC50)>70. For seasonal H3N2-infected influenza virus, both 5a and 5b with SI >17.3 indicated superior to ribavirin. The flavonoids having both not-naturally-occurring bromo-substituted B-rings and appropriate hydroxyls positioning on the A-rings might be critical in determining the activity and selectivity against H1N1-Tamiflu-resistant infected influenza viruses.
一系列新型黄酮衍生物是基于对传统中药黄芩(Scutellaria baicalensis GEORGI)活性成分的修饰合成的,并进行了抗流感活性筛选。合成的大黄素(黄酮)类似物,特别是B环上带有溴原子取代的类似物,对H1N1达菲耐药(H1N1 TR)病毒的活性远超奥司他韦或利巴韦林,并且通常具有更优越的选择性。最有希望的化合物是5b、5c、6b和6c,它们的50%有效浓度(EC50)都在4.0–4.5 µM左右,选择指数(SI=50%细胞毒性浓度(CC50)/EC50)>70。对于季节性H3N2流感病毒感染,5a和5b的SI均大于17.3,优于利巴韦林。这些具有非天然溴取代B环和A环上适当羟基位置的黄酮类化合物可能在决定抗H1N1达菲耐药流感病毒的活性和选择性方面起关键作用。