目的建立缬沙坦氨氯地平片有关物质含量的测定方法。方法采用高效液相色谱法,Agilent1220高效液相,(Eclipse plus,250 mm×4.6 mm,5μm)色谱柱,以磷酸盐缓冲液(取三乙胺10 m L加水至1 000 m L,用磷酸调节p H值至2.8)为流动相A,以甲醇—乙腈(70∶30)为流动相B,进行线性梯度洗脱,流速为1.0 m L·min-1,检测波长为237 nm。结果氨氯地平与杂质D分离度为14.44,缬沙坦与杂质B的分离度为9.46,且各物质之间有较好的分离;空白辅料对有关物质测定无干扰,专属性良好;强制降解试验中,杂质可与主峰完全分离。结论该方法结果准确,重复性好,可靠性强,可用于测定缬沙坦氨氯地平片中的有关物质。
目的:为抗2型糖尿病(T2DM)新药的研发提供信息与思路。方法:通过ScienceDirect数据库和万方数据库检索国内、外相关文献,归纳多甲氧基黄酮类化合物(Polymethoxylated Flavones,PMFs)抗T2DM的效应及作用靶点,并分析其可能机制。结果:PMFs可通过提高脂联素(Adiponectin)、过氧化物酶增殖体激活受体γ(PPAR-γ)和磷酸腺苷(AMP)激活的蛋白激酶(AMP-activated protein kinase,AMPK)的表达水平等途径改善胰岛素抵抗、调节脂代谢紊乱,并且可显著改善糖尿病晚期并发症。结论:PMFs具有显著的抗T2DM效应,深入研究PMFs的抗T2DM效应及其机制对于抗T2DM药物的研发具有重要意义。
[Objective] The aim was to understand the change of fermentation pro- cess of Chang-sheng-chuan green brick tea and analyze the changes in the con- tents of structure components of tea leaves before and after fermentation. [Method] Ten tea leaves before and after fermentation were chosen. The tea leaves sections were made using paraffin microtomy, PAS staining, and observed under light mi- croscopy. Through image analysis for the tea leaves, we compared the changes on the areas of the cellulose and colloid in cell before and after pile-fermentation. At the same time, the tea leaves were observed under transmission electron micro- scope. [Result] The results showed that the pile-fermentation process caused the tea leaves tissue to become loose, and expanded the cell space. Besides, the cell wall of tea leaves was obviously thinning, and even breaking which composed of cellulose. Image analysis showed that the leaf fiber composition reduced significant- ly, with a corresponding increase of yellow colloid in cell. Under observation of transmission electron microscope, there were large amounts of fungi located in the space between the colloid and the cell wall of the tea leaves after pile-fermentation. [Conclusion] The fermentation of Green brick tea is the process of microbial bio- transformation of tea, which is dominated by microbe and consumed the cellulose components of tea leaves.
