Ameliorating effect of balloon flower saponin on the ethanol-induced memory impairment in mice

The ameliorating effect of the root extract of Platycodon grandiflorum (Campanulaceae) on ethanol-induced cognitive dysfunction in mice was investigated. The mice with repeated administration of the root extract of P. grandiflorum, crude saponin fraction and platycoside E, a main ingredient of crude saponin fraction, showed a markedly prolonged step-through latency period (STL) on the passive avoidance task performed after acute ethanol intoxication, respectively. The present results suggest that the memory enhancing effect of the extract was ascribed mainly to the saponin fraction and that saponin of P. grandiflorum, particularly platycoside E could exert a beneficial effect on memory impairment in mice.     

去皮与不去皮桔梗饮片的色谱鉴别

目的:建立去皮与不去皮桔梗饮片鉴别方法。方法:采用TLC和HPLC,对去皮与未去皮桔梗饮片进行定性鉴别。结果:两种桔梗饮片的TLC图谱及HPLC图谱差异显著,未去皮桔梗饮片比去皮桔梗饮片多出3个斑点;HPLC图谱显示两种饮片均含有13个共有峰,但未去皮桔梗比去皮桔梗多出5个色谱峰,可以用于两种饮片的鉴别。结论:建立的TLC和HPLC图谱鉴别方法简便易行,可有效地区分去皮与未去皮桔梗药材和饮片,丰富了桔梗饮片的质量评价方法。     

桔梗种子发芽特性的研究

目的:通过对不同温度、光照条件、浸种时间和不同发芽基质的研究,找出桔梗种子发芽的最佳基本条件,从而为桔梗的规范化栽培提供一定的依据。方法:测定了桔梗种子的吸水率,利用不同浸种时间(12,24,36h),光照及黑暗,不同温度(10,15,20,25,30℃),不同发芽基质(纸间、纸上、纱间、纱上)等处理对桔梗种子进行发芽试验,测定其发芽率和发芽势。结果:在25℃下,桔梗种子的吸水率在36 h后达到最大,为120%。浸种时间对桔梗种子萌发的影响较小;不同温度和光照条件处理,对桔梗种子发芽率及发芽势的变化影响明显。结论:浸种12 h后,在25℃光照条件下进行纸上培养是桔梗种子萌发的最适条件。     

高效液相色谱法测定桔梗多糖对桔梗皂苷D在大鼠体内药物代谢动力学参数的影响

目的 考察桔梗多糖（Platycodon grandiflorum polysaccharides,PGP）对桔梗皂苷D（platycodin D,PD）在大鼠体内药物代谢动力学参数的影响,为桔梗的临床应用提供实验依据。方法 将24只SD大鼠随机分为PD组,PD+PGP低、中、高剂量组（PD-PGP-L、PD-PGP-M、PD-PGP-H组）,灌胃给药后在各时间点眼眦取血,采用高效液相色谱法测定给药后PD的血药浓度变化,由DAS 2.1软件拟合药物代谢动力学参数。结果 与PD组比较,各PD-PGP实验组均显著缩短PD的达峰时间（P<0.05）,并显著提高峰浓度（P<0.05）以及药时曲线下面积（P<0.05）。结论 PGP能够显著改变PD口服后的药物代谢动力学参数。     

Efficacy of Jasminum grandiflorum L. leaf extract on dermal wound healing in rats

Wound healing is a fundamental response to tissue injury and natural products accelerate the healing process. Here, we have explored the efficacy of topical administration of an ointment, prepared by methanolic extract of Jasminum grandiflorum L. (Oleaceae) leaves, on cutaneous wound healing in rats. The topical application of the Jasminum ointment on full thickness excision wounds accelerated the healing process. Tissue growth and collagen synthesis were significantly higher determined by total hydroxyl proline, hexosamine, protein and DNA content. The response was concentration‐ and time‐dependent, when observed on days 4, 8 and 12 after wound creation. The rate of wound healing was faster as determined by wound contraction, tensile strength and other histopathological changes. In addition, this ointment also raised the activity of superoxide dismutase (SOD) and catalase (CAT) with high GSH content and low lipid peroxidation products in wound tissue. Thus, it could be suggested that the ointment from the methanolic extract of J. grandiflorum leaf improves the rate of wound healing by enhancing the rate of collagen synthesis and also by improving the antioxidant status in the newly synthesised healing wound tissue.     

桔梗临床应用探源简

通过对桔梗古文献的梳理,结合桔梗的药性理论,阐发桔梗在临床各科中的应用,从而为临床用药提供理论依据。     

桔梗多糖对H2O2诱导PC12细胞氧化损伤的保护作用及机制研究

目的 研究桔梗多糖（PGP）对H2O2致PC12细胞氧化应激损伤的保护作用机制。方法 建立H2O2诱导PC12细胞氧化损伤模型,MTT法检测细胞存活率;比色法测定细胞内乳酸脱氢酶（LDH）、丙二醛（MDA）含量、超氧化物歧化酶（SOD）以及谷胱甘肽过氧化物酶（GSH-Px）的活性;DCFH-DA检测细胞内ROS;qPCR、Western Blot方法分别检测NOX2、p22和Rac mRNA和蛋白的表达。结果 与模型组相比,PGP预处理24h后,加入终浓度为600 μmol/L H2O2处理2h,LDH、MDA含量和细胞内ROS减少,SOD与GSH-Px活性增强,同时,PGP下调NOX2、p22和Rac mRNA和蛋白的表达水平。结论 PGP对H2O2诱导的PC12细胞的氧化损伤具有保护作用,其作用机制可能与抑制NADPH氧化酶2(NOX2)过表达有关。      

外源物质对桔梗种子发芽影响的研究

目的:确定能最大限度提高桔梗种子发芽率的外源物质,为桔梗的规范化栽培提供依据。方法:25℃下,在黑暗和光照2个不同条件下,用一定含量的GA₃,H₂O₂,KMnO₄,PEG溶液对桔梗种子进行发芽预处理。结果:50～250 mg.L^-1的GA₃均能不同程度地提高桔梗种子的发芽,1%～2%H₂O₂对桔梗种子的发芽也有一定的促进作用,0.1%～0.5%KMnO4和15%～35%PEG对桔梗种子的萌发具有抑制作用。结论:50～250 mg.L^-1的GA3和较低含量的H₂O₂对桔梗种子的萌发具有促进作用。     

桔梗皂苷提取工艺及药理作用研究进展

桔梗是药食同源的中药,具有很高的药用和食用价值。皂苷类化合物是桔梗中的主要有效成分,桔梗皂苷的药理作用主要有镇咳平喘、抗肿瘤、抗炎、抗氧化和调节免疫等。掌握桔梗皂苷的药理作用及如何有效提取桔梗中皂苷类成分,对桔梗资源的开发利用具有重要意义。     

桔梗提取物对D-氨基半乳糖/内毒素诱导暴发性肝衰竭的影响

目的探讨桔梗提取物对D-氨基半乳糖/内毒素诱导的小鼠暴发性肝衰竭的预防作用。方法采用D-氨基半乳糖/内毒素诱导的小鼠暴发性肝衰竭模型,桔梗提取物小剂量组给予桔梗提取物150 mg/kg,桔梗提取物大剂量组给予桔梗提取物300 mg/kg,阳性对照组给予谷胱甘肽300 mg/kg,给药2次。末次给药1 h后除正常组外各组均腹腔注射D-氨基半乳糖(700 mg/kg)和内毒素(10μg/kg),8 h后,颈动脉取血,测定血清中丙氨酸氨基转肽酶(ALT)和天门冬氨酸氨基转移酶(AST)含量,取肝脏,液氮保存。结果模型组小鼠肝损伤严重,ALT、AST较高,给药组AST及ALT降低。结论桔梗提取物能够减轻D-氨基半乳糖/内毒素诱导的小鼠暴发性肝衰竭,对肝脏起到保护作用。