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Identification, in vitro evaluation and modeling studies of the constituents from the roots of Arnebia euchroma for antitumor activity and STAT3 inhibition.
Bioorganic Chemistry ( IF 4.5 ) Pub Date : 2020-02-05 , DOI: 10.1016/j.bioorg.2020.103655
Huihui Cao 1 , Wenqiang Zhang 1 , Dongyi Liu 1 , Manting Hou 1 , Shiyu Liu 1 , Wenkai He 1 , Jiawei Lin 1 , Meng Shao 1
Bioorganic Chemistry ( IF 4.5 ) Pub Date : 2020-02-05 , DOI: 10.1016/j.bioorg.2020.103655
Huihui Cao 1 , Wenqiang Zhang 1 , Dongyi Liu 1 , Manting Hou 1 , Shiyu Liu 1 , Wenkai He 1 , Jiawei Lin 1 , Meng Shao 1
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Phytochemical investigation of the roots of Arnebia euchroma led to the isolation of a new dimeric naphthoquinone, shikometabolin H (1), a new meroterpeniod, epoxyarnebinol (5) and a new ring A-seco hopane triterpenoid, 2, 3-secodiplopterol dioic acid (7), together with 18 known compounds. The structures of the new compounds were elucidated by extensive spectroscopic analyses, including UV, IR, HRESIMS, 1D and 2D NMR. The absolute configuration of 1 was assigned by comparison of the experimental and calculated ECD data, whereas that of 5 was achieved by the comparison between experimental and calculated OR values. Compound 7 was found to be the first ring A-seco hopane triterpenoid ever reported. Data from MTT assays showed that compounds 1, 2, 4, 8, 11-14 and 19 possessed promising anti-proliferative activities in human melanoma cells A375 and A2058, and human colorectal adenocarcinoma cells HCT116 and SW620. In addition, molecular docking study was carried out to predict the possible binding modes of these active compounds with STAT3. Immunoblotting results further confirmed the inhibitory effects of compounds 1, 4, 8, 11, 14 and 19 on STAT3, which was indicated by the downregulated protein levels of phosphorylated and/or total STAT3 in A2058 and HCT116 cells.
中文翻译:
紫草根中成分的抗肿瘤活性和STAT3抑制作用的鉴定,体外评估和建模研究。
对紫草(Arnebia euchroma)的根进行植物化学研究后,分离出一种新的二聚萘醌,shikometabolin H(1),一种新的甲氧萜,环氧环戊烯醇(5)和一种新的环A-seco ane烷三萜,2,3-secodiplopterol dioic acid( 7),以及18种已知化合物。通过广泛的光谱分析,包括UV,IR,HRESIMS,1D和2D NMR,阐明了新化合物的结构。通过比较实验值和计算出的ECD数据来分配1的绝对构型,而通过比较实验值和计算出的OR值获得5的绝对构型。发现化合物7是有报道的第一个环A-seco hop烷三萜。来自MTT分析的数据表明化合物1,2,4,8,11-14和19在人黑素瘤细胞A375和A2058以及人大肠腺癌细胞HCT116和SW620中具有有希望的抗增殖活性。另外,进行了分子对接研究以预测这些活性化合物与STAT3的可能结合方式。免疫印迹结果进一步证实了化合物1、4、8、11、14和19对STAT3的抑制作用,这可以通过A2058和HCT116细胞中磷酸化和/或总STAT3的蛋白水平下调来表明。
更新日期:2020-02-06
中文翻译:

紫草根中成分的抗肿瘤活性和STAT3抑制作用的鉴定,体外评估和建模研究。
对紫草(Arnebia euchroma)的根进行植物化学研究后,分离出一种新的二聚萘醌,shikometabolin H(1),一种新的甲氧萜,环氧环戊烯醇(5)和一种新的环A-seco ane烷三萜,2,3-secodiplopterol dioic acid( 7),以及18种已知化合物。通过广泛的光谱分析,包括UV,IR,HRESIMS,1D和2D NMR,阐明了新化合物的结构。通过比较实验值和计算出的ECD数据来分配1的绝对构型,而通过比较实验值和计算出的OR值获得5的绝对构型。发现化合物7是有报道的第一个环A-seco hop烷三萜。来自MTT分析的数据表明化合物1,2,4,8,11-14和19在人黑素瘤细胞A375和A2058以及人大肠腺癌细胞HCT116和SW620中具有有希望的抗增殖活性。另外,进行了分子对接研究以预测这些活性化合物与STAT3的可能结合方式。免疫印迹结果进一步证实了化合物1、4、8、11、14和19对STAT3的抑制作用,这可以通过A2058和HCT116细胞中磷酸化和/或总STAT3的蛋白水平下调来表明。