A new compound, perforaphenonoside A (1), along with 11 known compounds (2-12) were isolated from a methanol extract of adventitious roots of Hypericum perforatum. Their chemical structures were elucidated using chemical and physical methods as well as comparison of NMR and mass spectral data with previously reported data. Their inhibition of NF-$\kappa}B$ and activation of PPAR was measured in HepG2 cells using a luciferase reporter system. Among the compounds 3, 6, 7 and 12 inhibited NF-$\kappa}B$ activation stimulated by TNF$\alpha}$ in a dose-dependent manner, with $IC_50}$ values ranging from 0.85 to $8.10\mu}M$. Moreover, compounds 1-3, 7, 11 and 12 activated the transcriptional activity of PPARs in a dose-dependent manner, with $EC_50}$ values ranging from 7.3 to $58.7\mu}M$. The transactivational effects of compounds 1-3, 7, 11 and 12 were evaluated on three individual PPAR subtypes. Among them, compound 2 activated $PPAR\alpha}$ transcriptional activity, with 153.97% stimulation at $10\mu}M$, while compounds 1, 2 and 11 exhibited transcriptional activity of $PPAR\gamma}$, with stimulation from 124.76% to 126.91% at $10\mu}M$.
从贯叶连翘不定根的
甲醇提取物中分离出了一种新化合物--贯叶
连翘苷 A(1)和 11 种已知化合物(2-12)。利用
化学和物理方法以及核磁共振和质谱数据与之前报道的数据进行比较,阐明了它们的
化学结构。利用
荧光素酶报告系统测定了这些化合物在 HepG2 细胞中抑制 NF-
$k\aPPA}B$ 和激活
PPAR 的作用。在化合物 3、6、7 和 12 中,它们对 TNF
$\alpha}$ 刺激的 NF-
$\kaPPA}B$ 激活的抑制作用呈剂量依赖性,
$IC_50}$ 值从 0.85 到
$8.10\mu}M$ 不等。此外,化合物 1-3、7、11 和 12 以剂量依赖的方式激活了
PPARs 的转录活性,
$EC_50}$值从 7.3 到
$58.7\mu}M$不等。评估了化合物 1-3、7、11 和 12 对三种
PPAR 亚型的转录作用。其中,化合物2激活了
$PPARα}$的转录活性,在
$10\mu}M$时刺激率为153.97%;化合物1、2和11表现出了
$PPARγ}$的转录活性,在
$10\mu}M$时刺激率为124.76%到126.91%。