Inhibitory Effect of Flavonoid Glycosides from Chlorophytum comosum on Nasopharyngeal Carcinoma 5-8F Cells and Its Mechanism

[Objectives]To study the inhibitory activity of two flavonoid glycosides isolated from Chlorophytum comosum Laxum R.Br on human nasopharyngeal carcinoma(NPC)cell line 5-8F in vitro and its mechanism.[Methods]The flavonoid glycosides were isolated and purified from the ethanol alcoholic extract of the roots of Liliaceae plant Chlorophytum comosum by silica gel column chromatography,macroporous resin column chromatography,Sephadex LH-20,and reverse column chromatography(ODS).The inhibitory activity of flavonoid glycosides on human nasopharyngeal carcinoma cells was analyzed by CCK-8 method,and the potential mechanism was preliminarily analyzed by molecular docking.[Results]Two flavonoid glycosides were identified as isovitexin 2″-0-rhamnoside and 7-2″-di-O-β-glucopyranosylisovitexin.Two flavonoid glycosides showed promising inhibitory effect on human nasopharyngeal carcinoma cell line 5-8F,with IC_(50) values of 24.8 and 27.5μmol/L,respectively.Molecular docking results showed that the potential targets of two flavonoid glycosides include CyclinD1,Bcl-2β-Catenin,ILK,TGF-β,in addition,two glycosides showed higher predicted binding affinity towards CyclinD1,which verifies the cytotoxicity of the two compounds on human nasopharyngeal carcinoma cell line 5-8F in vitro.[Conclusions]Two flavonoid glycosides are the active molecules in Chlorophytum comosum that can inhibit the proliferation of human nasopharyngeal carcinoma cells,and have the potential to be used in the research and development of anti nasopharyngeal carcinoma drugs.

A New Flavone Glycoside from Isodon enanderianus

A new flavone glycoside, 5,8-dihydroxy-4',6,7-trimethoxyflavone 8-O-(-D-glucopyranoside 1, together with three known flavonoids, pedalitin 2, cirsimartin 3 and genkwanin 4, were isolated from the aerial parts of Isodon enanderianus. Their structures were determined on the basis of spectral data.

基于多指标定量指纹图谱和化学计量学的淫羊藿质量标准提高研究

进一步完善淫羊藿质量评价体系,提高淫羊藿质量标准。以6种8-异戊烯基黄酮苷作为指标成分,通过HPLC对4个品种、共24批次淫羊藿开展多指标定量指纹图谱的研究,并结合聚类分析(Hierarchical Clustering Analysis,HCA)、主成分分析(Principal Component Analysis,PCA)和正交偏最小二乘法判别分析(Orthogonal Partial Least Squares Discriminant Analysis,OPLS-DA)化学计量学方法进行质量评价。4个品种淫羊藿在相似度、指标成分含量上差异较大。发现朝藿定C、淫羊藿苷、淫羊藿次苷Ⅰ和宝藿苷Ⅰ是造成不同品种淫羊藿差异的特征性成分,淫羊藿次苷Ⅰ和宝藿苷Ⅰ可作为药材质量控制指标成分。建立的多指标定量指纹图谱分析方法稳定、可靠,结合化学计量学可更加全面、快速对淫羊藿进行质量评价,为今后提高淫羊藿的质量标准提供了科学依据。

Constituents from Ranunculus sieboldii Miq.

Aim To investigate the chemical composition of Ranunculus sieboldii Miq..Methods Repeated column chromatography over silica gel, polyamide and RP-18 followed by gelfiltration on sephadex LH-20 were used to isolate chemical constituents, and their structures wereelucidated by extensive spectroscopic methods (UV, IR, MS, ~1H NMR, ^(13)C NMR) including 2D NMR(COSY, HMQC, HMBC, NOESY) techniques and by direct comparing spectral data with those reported inliterature. Results Five flavonoid glycosides named apigenin-4'-O-α-L-rhamnopyranoside (1),apigenin-7-O-β-D-glucopyranosyl-4'-O-α-L-rhamnopyranoside (2), apigenin-8-C-α-L-arabinopyranoside(3), apigenin-8-C-β-D-ga-lactopyranoside (4) , tricin-7-O-β-D-glucopyranoside (5), together withtricin (6), luteolin (7), scopoletin (8), esculetin (9), scoparone (10), ferulic acid (11),protocatechuic acid (12) , and tematolide (13) were isolated from the 95% etha-nolic extract of itswhole plant, and their cytotoxic activities were preliminarily tested. Conclusion Compounds 1-12were obtained from this genus and compound 13 from this species for the first time. Furthermore,compound 1 was for the first time isolated from nature while the ^(13)C NMR data of compounds 2 and3 are reported for the first time. The bioassay revealed that compound 1 was active against BEL-7407and A549 cell lines (IC_(45) 43, 77 μg·mL^(-1)), 8 and 10 showed inhibitory activities on KB celllines (IC_(50) 78, 44 μg·mL^(-1)) and HL-60 cell lines (Ic_(50) 85, 85 μg·mL^(-1)), while 7exerted moderate cytotoxic activities on KB, BFL-7407, A549 and HL-60 cell lines with their IC_(50)being 51, 55, 44 and 10 μg·mL^(-1) , respectively.

石蝉草中的三个新黄酮苷

为了研究石蝉草的化学成分,用色谱法进行分离纯化,从石蝉草的正丁醇萃取部位分离得到3个化合物,根据光谱数据和理化性质进行结构鉴定,分别鉴定为阿拉波亭-4′,7-二甲醚-8-O-β-D-葡糖苷(I)、异高黄芩素-4′-甲醚-8-O-α-L-阿拉伯糖基(1→4)-β-D-葡糖苷(II)、异高黄芩素-4′,7-二甲醚-8-O-α-L-阿拉伯糖基(1→4)-β-D-葡糖苷(III)。化合物I,II,III均为新化合物。

尾叶紫金牛化学成分研究Ⅱ

目的:对尾叶紫金牛的化学成分进行研究。方法:应用正相硅胶、Sephadex LH-20、MCI gel、ODS等填料进行分离纯化,运用MS、1H-NMR、13C-NMR结合理化性质鉴定结构。结果:从尾叶紫金牛的乙酸乙酯萃取部位及正丁醇萃取部位共分离鉴定了5个化合物,分别为射干醌G(Ⅰ),5-(顺-8-十七碳烯基)间苯二酚(Ⅱ),射干醌H(Ⅲ),山奈酚-3-O-α-L-鼠李糖苷(Ⅳ),槲皮素-3-O-α-L-鼠李糖苷(Ⅴ)。结论:所有化合物均为首次从该植物中分离得到。

LC-MS/MS法同时测定大鼠血浆中4种淫羊藿黄酮苷

建立大鼠血浆中朝藿定A、B、C及淫羊藿苷的LC-MS/MS法,并应用于大鼠肌肉注射喘可治注射液后血浆中4种黄酮苷浓度的测定及喘可治注射液的药物动力学研究。采用的色谱条件为Agilent Eclipse XDB-C_(18)(150 mm×2.1 mm,5.0μm)色谱柱,乙腈-0.1%甲酸水溶液(35∶65)为流动相,流速0.22 mL·min^(-1),柱温40℃;质谱条件为电喷雾多反应离子监测(MRM)负离子检测模式,血浆样品采用固相萃取法处理。结果显示,朝藿定A、B、C及淫羊藿苷在1~1 000 ng·m L^(-1)浓度内具有良好的线性关系;日内精密度RSD<5.99%,日间精密度RSD<10.16%;各成分相对回收率介于88.1%~101.1%,RSD<7.9%,绝对回收率介于72.0%~86.6%,RSD<6.3%。研究表明,该分析方法专属、灵敏、快速,适用于血浆中淫羊藿黄酮苷浓度的测定。