Abstract
The γ-pyrones, artomunoxanthotrione epoxide, cyclocommunol, cyclomulberrin, and cyclocommunin exhibited potent inhibition of human PLC/PRF/5 and KB cells in-vitro. Dihydroisocycloartomunin showed significant and potent inhibition of human PLC/PRF/5 and KB cells in-vitro, respectively. Cyclomorusin, dihydrocycloartomunin and artomunoxanthone showed significant inhibition of KB cells in-vitro. Based on the above finding and the reported antileukaemic activity of xanthone psorospermin, a series of natural γ-pyrones was prepared and the inhibition of human PLC/PRF/5 and KB cells in-vitro was measured. Structure-activity analysis indicated the epoxide group substituted at 3-hydroxyl and 2,6-; 3,6-; and 3,5-dihydroxyl xanthone enhanced the anti-tumour activity. The epoxide group substituted at the 6-hydroxyl group of 1,6-dihydroxyxanthone did not show anti-tumour activity.
γ-吡喃酮类化合物,包括artomunoxanthotrione环氧化物、cyclocommunol、cyclomulberrin和cyclocommunin在体外表现出对人类PLC/PRF/5和KB细胞的强效抑制作用。Dihydroisocycloartomunin在体外对人类PLC/PRF/5和KB细胞分别表现出显著和强效的抑制作用。Cyclomorusin、dihydrocycloartomunin和artomunoxanthone在体外对KB细胞表现出显著的抑制作用。基于上述发现和报道的黄酮类化合物psorospermin的抗白血病活性,制备了一系列天然γ-吡喃酮类化合物,并测量了其在体外对人类PLC/PRF/5和KB细胞的抑制作用。结构活性分析表明,取代3-羟基和2,6-;3,6-;和3,5-二羟基黄酮的环氧化物基团增强了抗肿瘤活性。1,6-二羟基黄酮的6-羟基处取代的环氧化物基团没有显示出抗肿瘤活性。