Xestoquinone and related metabolites (the xestoquinone family) occur in marine sponges and are known to show a variety of biological activities. In this study, the first comprehensive evaluation of antifungal activity was performed for xestoquinone and nine natural and unnatural analogues in comparison with their cytotoxicity. The cytotoxicity against two human squamous cell carcinoma cell lines, A431 and Nakata, indicated that the terminal quinone structure of the polycyclic molecules was important (xestoquinone, etc.) and that the presence of a ketone group at C-3 of the opposite terminus dramatically diminished the activity (halenaquinone, etc.). In contrast, a ketone group at C-3 enhanced the antifungal activity against the plant pathogen, Phytophthora capsici, regardless of the presence of a quinone moiety. The cytotoxicity and antifungal activity of the xestoquinone family were negatively correlated with each other.
酮醌和相关代谢物(酮醌家族)存在于海绵中,并且已知表现出多种
生物活性。在这项研究中,首次对酮醌和九种天然和非天然类似物的抗真菌活性与其细胞毒性进行了综合评估。对两种人鳞状细胞癌
细胞系 A431 和 Nakata 的细胞毒性表明,多环分子的末端醌结构很重要(苯醌等),并且在相对末端的 C-3 处存在酮基团显着降低活性(海
萘醌等)。相比之下,无论是否存在醌部分,C-3 处的酮基都会增强针对植物病原体辣椒疫霉的抗真菌活性。酮醌家族的细胞毒性和抗真菌活性彼此呈负相关。