Farag Mohamed A, Fekry Mostafa I, Al-Hammady Montasser A, Khalil Mohamed N, El-Seedi Hesham R, Meyer Achim, Porzel Andrea, Westphal Hildegard, Wessjohann Ludger A
Pharmacognosy Department, College of Pharmacy, Cairo University, Kasr el Aini st., P.B. 11562 Cairo, Egypt.
National Institute of Oceanography and Fisheries, Red Sea Branch, 84511 Hurghada, Egypt.
Mar Drugs. 2017 Jul 4;15(7):211. doi: 10.3390/md15070211.
sp. soft corals are rich in cembranoid diterpenes, which represent the main chemical defense of corals against their natural predators in addition to their myriad biological effects in humans. Quantitative NMR (qNMR) was applied for assessing the diterpene variation in 16 soft coral specimens in the context of their genotype, origin, and growing habitat. qNMR revealed high diterpene levels in sp. compared to and , with (ent)sarcophines as major components (17-100 µg/mg) of the coral tissues. Multivariate data analysis was employed to classify samples based on the quantified level of diterpenes, and compared to the untargeted NMR approach. Results revealed that qNMR provided a stronger classification model of sp. than untargeted NMR fingerprinting. Additionally, cytotoxicity of soft coral crude extracts was assessed against androgen-dependent prostate cancer cell lines (PC3) and androgen-independent colon cancer cell lines (HT-29), with IC values ranging from 10-60 µg/mL. No obvious correlation between the extracts' IC values and their diterpene levels was found using either Spearman or Pearson correlations. This suggests that this type of bioactivity may not be easily predicted by NMR metabolomics in soft corals, or is not strongly correlated to measured diterpene levels.
柳珊瑚富含西松烷型二萜类化合物，这些化合物除了对人类具有多种生物学效应外，还是珊瑚抵御其天然捕食者的主要化学防御物质。定量核磁共振（qNMR）被用于评估16个软珊瑚标本中基因型、来源和生长栖息地背景下二萜类化合物的变化。qNMR显示，与[珊瑚名称1]和[珊瑚名称2]相比，[目标珊瑚名称]中的二萜类化合物含量较高，（对映）肉芝软珊瑚素是珊瑚组织的主要成分（17 - 100微克/毫克）。采用多变量数据分析根据二萜类化合物的定量水平对样本进行分类，并与非靶向核磁共振方法进行比较。结果表明，qNMR提供了比非靶向核磁共振指纹图谱更强的[目标珊瑚名称]分类模型。此外，评估了软珊瑚粗提物对雄激素依赖性前列腺癌细胞系（PC3）和雄激素非依赖性结肠癌细胞系（HT - 29）的细胞毒性，IC50值范围为10 - 60微克/毫升。使用斯皮尔曼或皮尔逊相关性分析均未发现提取物 的IC50值与其二萜类化合物水平之间存在明显相关性。这表明这种类型的生物活性可能不易通过软珊瑚的核磁共振代谢组学预测，或者与测得的二萜类化合物水平没有强烈相关性。
