半边莲的化学成分研究

目的 研究半边莲的化学成分.方法 利用硅胶柱、凝胶柱、制备HPLC等分离和纯化,通过化合物的波谱数据和理化特性进行结构鉴定.结果 从半边莲中分离鉴定了12个化合物,分别为环桉烯醇(cycloeucalenol,Ⅰ)、24-亚甲基环木波罗醇(24-methylenecycloartanol,Ⅱ)、植物醇(phytol,Ⅲ)、植物烯醛(phytenal,Ⅳ)、β-香树脂醇(Ⅴ)、腺苷(Ⅵ)、正丁基-β-D-呋喃果糖苷(Ⅶ)、正丁基-α-D-呋喃果糖苷(Ⅷ)、正丁基-β-D-吡喃果糖苷(Ⅸ)、正丁基-α-D-吡喃果糖苷(Ⅹ)、水杨苷(Ⅺ)、5-羟甲基糠醛(Ⅻ).结论 其中化合物Ⅰ～Ⅳ及Ⅵ～Ⅻ为首次从半边莲属植物中分离得到,化合物Ⅴ为首次从该植物中分离得到.     

雷公藤多苷对小鼠细胞免疫功能的影响

目的研究雷公藤多苷对正常小鼠细胞免疫功能的影响。方法用流式细胞仪及T淋巴细胞增殖试验分别测定雷公藤多苷对正常小鼠外周血T淋巴细胞亚群及T淋巴细胞增殖能力的影响。结果与空白对照组比较,雷公藤多苷可显著降低成熟淋巴细胞（CD3＋）、T辅助性及T诱导性淋巴细胞亚群（CD4＋）百分比以及T淋巴细胞增殖能力,也可显著升高T抑制淋巴细胞亚群（CD8＋）百分比。结论雷公藤多苷具有一定的细胞免疫抑制作用。     

Cranberry Polyphenols in Esophageal Cancer Inhibition: New Insights

Esophageal adenocarcinoma (EAC) is a cancer characterized by rapidly rising incidence and poor survival, resulting in the need for new prevention and treatment options. We utilized two cranberry polyphenol extracts, one proanthocyanidin enriched (C-PAC) and a combination of anthocyanins, flavonoids, and glycosides (AFG) to assess inhibitory mechanisms utilizing premalignant Barrett’s esophagus (BE) and EAC derived cell lines. We employed reverse phase protein arrays (RPPA) and Western blots to examine cancer-associated pathways and specific signaling cascades modulated by C-PAC or AFG. Viability results show that C-PAC is more potent than AFG at inducing cell death in BE and EAC cell lines. Based on the RPPA results, C-PAC significantly modulated 37 and 69 proteins in JH-EsoAd1 (JHAD1) and OE19 EAC cells, respectively. AFG treatment significantly altered 49 proteins in both JHAD1 and OE19 cells. Bioinformatic analysis of RPPA results revealed many previously unidentified pathways as modulated by cranberry polyphenols including NOTCH signaling, immune response, and epithelial to mesenchymal transition. Collectively, these results provide new insight regarding mechanisms by which cranberry polyphenols exert cancer inhibitory effects targeting EAC, with implications for potential use of cranberry constituents as cancer preventive agents.     

HPLC法测定葛花中大豆苷和染料木苷的含量

目的建立HPLC法测定葛花中大豆苷、染料木苷的含量。方法采用C18色谱柱(250mm×4.6mm,5μm);流动相为乙腈-1.0mL·L-1磷酸溶液(15∶85);流速为1.0mL·min~(-1);检测波长为260nm;柱温为30℃。结果大豆苷回归方程为Y=166 989.8 X-1 438.6,r=0.999 9,大豆苷在0.206~1.032μg范围内线性关系良好;染料木苷回归方程为Y=142 567 X+2 543.1,r=0.999 7,染料木苷在0.204~1.018μg范围内线性关系良好。结论该方法简便、准确,重复性好,可作为葛花的质量评价依据。     

Protein tyrosine phosphatase 1B (PTP1B) inhibitory activity and glucosidase inhibitory activity of compounds isolated from Agrimonia pilosa

Context: Despite phytochemical studies of Agrimonia pilosa Ledeb. (Rosaceae), the antidiabetic effects of this plant are unknown.

Objective: This study characterizes the isolated compounds from the aerial parts of A. pilosa and evaluates their PTP1B and α-glucosidase inhibitory properties.

Materials and methods: Ethanol extract of A. pilosa was found to inhibit 64% PTP1B activity at 30?μg/mL. The ethanol extract was partitioned with methylene chloride, ethyl acetate, n-butanol, and water fractions. Among these, the ethyl acetate fraction displayed the most potent PTP1B activity. The ethyl acetate extract was separated by chromatographic methods to obtain flavonoids and triterpenoids (1–11); which were evaluated for their inhibitory effects on PTP1B activity with p-nitrophenyl phosphate (p-NPP) as a substrate, and also α-glucosidase enzyme.

Results: Compounds 1–11 were identified as apigenin-7-O-β-d-glucuronide-6″-methyl ester, triliroside, quercetin-7-O-β-d-glycoside, quercetin-3-O-β-d-glycoside, kaempferol, kaempferol-3-O-α-l-rhamnoside, β-sitosterol, ursolic acid, tormentic acid, methyl 2-hydroxyl tricosanoate, and palmitic acid. Compounds 8, 9, and 11 displayed inhibitory effects on PTP1B activity with IC₅₀ values of 3.47?±?0.02, 0.50?±?0.06, and 0.10?±?0.03?μM, respectively. Compounds 3, 4, 6, and 9 exhibited inhibition of the α-glucosidase activity with IC₅₀ values of 11.2?±?0.2, 29.6?±?0.9, 28.5?±?0.1, and 23.8?±?0.4?μM, respectively.

Discussion and conclusion: As major ingredients of A. pilosa, compounds 1, 6, 8, and 9 showed the greatest inhibitory potency on PTP1B activity. Compounds 3, 6, 8, and 9 also showed potent inhibitory effects on α-glucosidase enzyme. This result suggested the potential of these compounds for developing antidiabetic agents.     

HPLC法测定复方桔梗止咳片中甘草苷和甘草酸含量

目的：建立同时测定复方桔梗止咳片中甘草苷和甘草酸含量的HPLC检测方法。方法：采用Agilent C18（4.6 mm×150 mm,5μm）色谱柱;以乙腈-0.05%磷酸为流动相进行梯度洗脱;流速1.0 mL·min-1;检测波长237 nm;进样量：10μL;柱温30℃。结果：甘草苷、甘草酸分别在10.65~42.60 mg·L-1、97.30~389.30 mg·L-1范围内呈良好的线性关系,r分别为1.0000、1.0000;平均回收率（n=6）分别为98.80%（RSD=0.73%）、99.84%（RSD=0.10%）。测得6批复方桔梗止咳片,每片分别含甘草苷135.28μg、123.16μg、113.21μg、136.08μg、160.84μg、156.32μg,甘草酸441.36μg、405.86μg、364.69μg、446.93μg、518.22μg、509.65μg。结论：该方法简便,重复性好,可用于同时测定复方桔梗止咳片中甘草苷和甘草酸的含量。     

卢旺达产金盏菊花的黄酮苷类成分

目的对卢旺达产金盏菊花的化学成分进行研究,为进一步开发利用该植物资源提供依据。方法采用大孔吸附树脂、正相硅胶、Sephadex LH-20、反相ODS等柱色谱以及制备型高效液相色谱法等手段进行分离纯化,并通过理化性质与核磁共振等波谱学数据相结合的方法鉴定化合物的结构。结果从金盏菊花体积分数为70%的乙醇溶液提取物中分离鉴定了6个单体成分,分别为异鼠李素-3-O-芸香糖苷(isorhamnetin-3-O-rutinoside,1)、异鼠李素-3-O-新橙皮糖苷(isorhamnetin-3-O-neohespeidoside,2)、香蒲新苷(typhaneoside,3)、槲皮素-3-O-β-D-新橙皮糖苷(quercetin-3-O-β-D-neohespeidoside,4)、芦丁(rutin,5)、槲皮素-3-O-(2″,6″-二-O-α-L-鼠李糖基)-β-D-葡萄糖苷(quercetin-3-O-(2″,6″-di-O-α-L-rhamnopyranosyl)-β-D-glucopyranoside,6)。结论首次对东非产金盏菊干燥花的化学成分进行研究,分离得到了6个黄酮类化合物。     

雷公藤多苷治疗强直性脊柱炎的疗效及安全性分析研究

目的：研究雷公藤多苷治疗强直性脊柱炎的有效性及安全性。方法：选取我院2009年1月-2013年12月收治的强直性脊柱炎患者50例,采取随机数字表法分为两组,每组25例。对照组给予柳氮磺胺吡啶片治疗,试验组给予雷公藤多苷片治疗,观察与比较两组患者经不同药物治疗的临床疗效及安全性。结果：试验组优良率明显高于对照组（P〈0.05）,差异具有统计学意义。两组患者分别出现肝功能异常、腹泻及月经推迟的患者数无明显差异（P〉0.05）,差异不具有统计学意义。结论：雷公藤多苷片治疗强直性脊柱炎的临床效果显著,且不良反应的发生率无明显增加,提升了用药的安全性,值得广泛推广。     

来氟米特联合雷公藤多苷治疗难治性肾病综合征疗效观察

目的探讨来氟米特联合雷公藤多苷治疗难治性肾病综合征的疗效。方法将60例难治性肾病综合征患者采取随机数字表法分为观察组和对照组,每组各30例,对照组予环磷酰胺联合泼尼松治疗,观察组予来氟米特联合雷公藤多苷治疗,治疗后对两组的临床总缓解率及肾功能各项指标治疗前后的变化情况进行比较分析。结果观察组患者治疗后的总缓解率达90.0%,明显高于对照组,两组比较差异有统计学意义(P0.05)。治疗后,两组患者的肾功能各项指标较治疗前明显改善,差异均有统计学意义(P0.05);治疗后观察组患者的尿蛋白、尿素氮、血肌酐明显降低,白蛋白明显升高,且较对照组改善更显著(P0.05)。结论来氟米特联合雷公藤多苷治疗难治性肾病综合征能有效提高临床疗效,改善肾功能,值得临床广泛推广和应用。