不同产地巴戟天中糖类成分HPLC-ELSD指纹图谱研究

目的 建立巴戟天中糖类化学成分HPLC指纹图谱的分析方法,研究不同产地的巴戟天药材的质量。方法采用HPLC法。色谱柱为Inertsil NH-2(250 mm×4.6 mm,5 μm);流动相：乙腈-水梯度洗脱;柱温：室温;体积流量：1.2 mL/min,以蒸发光散射检测器(ELSD)检测,检测条件：漂移管温度100 ℃;N2气流速度2.2 L/min;He在线脱气,气流速度20 mL/min。使用计算机辅助相似度评价软件进行数据处理。对不同产地的巴戟天药材指纹图谱的相似度进行比较分析。结果除两批外,其余8批巴戟天与系统生成对照指纹图谱的相似度均在0.94以上,归纳出巴戟天13个共有峰。通过与对照品的保留时间比较,1、2号峰分别为D-果糖、蔗糖。不同产地巴戟天药材中糖类化合物化学组成相似,但相对比例有明显的差异。结论 所用方法稳定、重现性好,可突出巴戟天药材的内在质量特征,为更好地控制巴戟天的内在质量提供了科学依据。     

Dichloromethane fraction of Melissa officinalis induces apoptosis by activation of intrinsic and extrinsic pathways in human leukemia cell lines

Abstract

Various components from medicinal plants are currently used in cancer therapy because of their apoptosis-inducing effects. The present study has aimed to investigate the growth inhibitory and apoptotic effects of Melissa officinalis on tumor cells. We prepared different fractions of this plant to investigate their inhibitory effects on two leukemia cell lines, Jurkat and K562. Fractions with the highest inhibitory effects were examined for induction of apoptosis by the annexin V/propidium iodide assay and cell cycle changes by flow cytometry. Real-time polymerase chain reaction evaluated the changes in expression of apoptosis-related genes. Among different fractions, dichloromethane and n-hexane dose-dependent showed the strongest inhibitory effects on both K562 and Jurkat cells. The dichloromethane fraction significantly induced apoptosis at concentration of 50?µg/ml on Jurkat (85.66?±?4.9%) and K562 cells (65.04?±?0.93%) at 24?h after treatment (p?<?0.002). According to cell cycle analysis, more than 70% of the cells accumulated in the sub-G1 phase when cultured in the presence of the dichloromethane fraction. This fraction up-regulated Fas and Bax mRNA expression as well as the Bax/Bcl-2 ratio according to cell type, showing its effect on the activation of both extrinsic and intrinsic pathways of apoptosis. The expression of apoptosis-related genes did not significantly change following treatment with the n-hexane fraction. These data indicated that the dichloromethane fraction of M. officinalis had the ability to induce apoptosis and change apoptosis-related gene expression in leukemia cells.     

Comparing the effects of Calendula officinalis and clotrimazole on vaginal Candidiasis: A randomized controlled trial

This triple-blind trial examined the effects of Calendula officinalis vaginal cream on the treatment of vaginal Candidiasis (primary outcome) and sexual function (secondary outcome). Married women aged 18–45 years with vaginal Candidiasis (n = 150) were recruited from April to October 2014 and randomized into Calendula and clotrimazole groups, using 5-g vaginal cream every night for seven nights. Clinical and laboratory assessments were conducted at 10–15 and 30–35 days after intervention and the female sexual function index was assessed at 30–35 days. Six women were lost to follow-up. The frequency of testing negative for Candidiasis in the Calendula group was significantly lower at the first (49% vs. 74%; odds ratio (OR) 0.32; 95% confidence interval (CI) 0.16–0.67) but higher at the second (77% vs. 34%; OR 3.1; 95% CI 1.5–6.2) follow-up compared to the clotrimazole group. The frequency of most signs and symptoms were almost equal in the two groups at the first follow-up, but were significantly lower in the Calendula group at the second follow-up. Sexual function had almost equal significant improvement in both groups. Calendula vaginal cream appears to have been effective in the treatment of vaginal Candidiasis and to have a delayed but greater long-term effect compared to clotrimazole.     

UPLC-Q-TOF/MS-based Metabolic Profiles of Bioactive Components in Rehmannia glutinosa and Cornus officinalis Herb Pair by Rat Intestinal Bacteria

Objective To investigate the metabolic routes and metabolites of Rehmannia glutinosa and Cornus officinalis herb pair produced by gut microbiome from rats.Methods A rapid and sensitive ultra-performance liquid chromatography/quadrupole-time-offlight mass spectrometry(UPLC-Q-TOF/MS) technique combined with Metabolynx?software was established and successfully applied to identify the metabolites of the main bioactive components in the herb pair extract by rat intestinal bacteria.Results Four parent compounds(loganin,morroniside,catalpol,and acteoside) and their eight corresponding metabolites were detected and tentatively identified by the characteristics of their protonated ions.Hydrogenated and demethylated loganetin,dehydroxylated morronisid aglycone,caffeic acid,and its methylated product were the main metabolites.These metabolites suggested that the glycosides were firstly hydrolyzed to their aglycones by hydrolytic enzymes of the enteric microbial flora and subsequently to the other metabolites through hydrogenation,(de)-methylation,and de-hydroxylation.Conclusion The results may be helpful for the further investigation of the pharmacokinetic study of R.glutinosa and C.officinalis herb pair in vivo.     

山茱萸总苷对坐骨神经损伤 Balb／c 小鼠神经传导速度及脊髓运动神经元内 Gap-43表达的影响

目的：探讨山茱萸总苷促进坐骨神经损伤再生及修复的临床效果及机制。方法84只 Balb/c 小鼠随机分为山茱萸总苷高剂量组（320 mg/kg/d）,中剂量组（160 mg/kg/d）,低剂量组（80 mg/kg/d）及生理盐水对照组,每组16只。各组分别于术后3天、5天、1周、2周、4周、8周时间点采用免疫组化法检测 L4～ L6脊髓运动神经元内生长相关蛋白（Gap-43）表达;术后第4、8、12周行电生理检查测定神经传导速度（MCV）。结果高剂量组,中剂量组 Gap-43表达明显多于低剂量和对照组（P ＜0．05）,术后第4、8、12周高剂量组、中剂量组较低剂量组和对照组再生神经传导速度加快、波幅升高、潜伏时缩短（P ＜0．05）。结论山茱萸总苷能够促进大鼠周围神经损伤后 MCV 的恢复,其机制可能为增加损伤脊髓运动神经元中 Gap-43的表达。     

Preparation,Characterization, and Biocompatibility Assessment of Polymer-Ceramic Composites Loaded with Salvia officinalis Extract

In the present work, hydroxyapatite-polymer materials were developed. The preparation, as well as characterization of the ceramic-polymer composites based on polyvinylpyrrolidone, sodium alginate, and gelatin were described. The system was enriched with the addition of common sage extract (Salvia officinalis). The antioxidant potential of sage aqueous extract and total polyphenol content was determined. The antioxidant capacity and total phenolic content of extract were equal to 86.06 ± 0.49% and 16.21 ± 0.58 mg gallic acid equivalents per gram of dry weight, respectively. Incubation studies in selected biological liquids were carried out to determine the biomineralization capacity on the surface of the composites and to examine the kinetics of release of the active substances from within the material. As a result of the incubation, a gradual release of the extract over time from the polymer matrix was observed; moreover, the appearance of new apatite layers on the composite surface was recorded as early as after 14 days, which was also confirmed by energy-dispersive X-ray spectroscopy (EDS) microanalysis. The composites were analyzed with Fourier transform infrared spectroscopy (FTIR) spectroscopy, and the morphology was recorded by scanning electron microscope (SEM) imaging. The in vitro biological studies allowed their cytotoxic effect on the reference L929 fibroblasts to be excluded. Further analysis of the biomaterials showed that enrichment with polyphenols does not support the adhesion of L929 cells to the surface of the material. However, the addition of these natural components stimulates human monocytes that constitute the first step of tissue regeneration.     

11种厚朴中酚性成分的比较研究

目的 用HPLC法对湖北神农架和恩施产厚朴中酚性成分进行含量测定,并与不同地区的商品厚朴进行含量比较.方法 HPLC法:色谱柱为Agilent HC-C18(4.6mm×250mm×5μm);以甲醇-水(78:22)为流动相;检测波长为294mm.结果 恩施干皮的含量19.103%＞恩施枝皮4.744%＞神农架干皮3....     

云南蕊木的研究进展

云南蕊木是傣族民间常用的中草药,主要含有具有多种生物活性的单萜吲哚生物碱.本文从化学成分、生物活性和临床应用3个方面综述云南蕊木的研究进展,以期为云南蕊木的更深入研究提供参考.     

马鞭草总黄酮对HepG-2细胞增殖及侵袭力影响

目的 探讨马鞭草总黄酮（TFV）对肝癌HepG-2细胞增殖和侵袭力的影响。方法 实验设对照组、TFV 50、100、200 mg/L组,噻唑蓝法检测人肝癌HepG-2细胞增殖率,Hoechest 33342染色检测HepG-2细胞凋亡情况,Transwell法检测HepG-2细胞侵袭力变化,ELISA法测定HepG-2细胞中基质金属蛋白酶9（MMP-9）及血管内皮生长因子（VEGF）表达水平。结果 各剂量TFV均能明显抑制HepG-2 细胞生长,呈现剂量依赖性（P < 0.05）;与对照组比较,TFV 50、100、200 mg/L组HepG-2细胞凋亡率[分别为（10.31±0.51）%、（16.02±0.63）%、（35.05±1.12）%]明显增加,透膜细胞数[分别为（119.2±17.1）、（98.5±13.5）、（54.8±6.4）个]明显下降,差异均有统计学意义（P < 0.05）;与对照组比较,TFV 50、100、200 mg/L组HepG-2细胞MMP-9和VEGF表达水平[分别为（7.81±0.48）、（6.28±0.41）（3.08±0.35）和（0.87±0.07）、（0.63±0.04）、（0.45±0.06）]明显降低,差异有统计学意义（P < 0.05）。结论 马鞭草总黄酮可明显抑制人肝癌HepG-2细胞增殖、降低HepG-2细胞侵袭力,其机制可能与下调HepG-2细胞内MMP-9和VEGF表达水平有关。     

Design of Green Silver Nanoparticles Based on Primula Officinalis Extract for Textile Preservation

The present study aims to bring an addition to biomass resources valorization for environmental-friendly synthesis of nanoparticles. Thus, the green synthesis of silver nanoparticles (AgNPs) was performed, using a novel and effective reducing agent, Primula officinalis extract. The synthesis was optimized by monitoring the characteristic absorption bands, using UV–Vis spectroscopy, and by evaluating the size and physical stability. The phenolic consumption was established using Folin-Ciocâlteu method (1.40 ± 0.42 mg, representing ~5% from the total amount of poly--phenols) and the antioxidant activity was evaluated using chemiluminescence and TEAC methods. The optimum ratio extract to Ag ions was 1:3, for which the AgNPs presented a zeta potential value of −29.3 ± 1.2 mV and particles size of 5–30 nm. For characterization, EDS and XRD techniques were used, along with microscopy techniques (TEM). The AgNPs dispersions were applied on natural textile samples (cotton and wool), as a novel antimicrobial treatment for textile preservation. The treated fabrics were further characterized in terms of chromatic parameters and antimicrobial effect against Escherichia coli, Staphylococcus aureus, Bacillus subtilis, and Penicillium hirsutum strains. The high percentages of bacterial reduction, >99%, revealed that the AgNPs produced are a good candidate for textiles preservation against microbial degradation.