超高效液相色谱法测定波棱瓜子中Herpetrione的含量

目的 用超高效液相色谱法测定波棱瓜子中Herpetrione的含量.方法 采用Waters ACQUITY UPLC BEHC18色谱柱(2.1 mm ×50 mm,1.7 μm),流动相为乙腈-0.1％磷酸溶液(21∶79),流速为0.5 ml/min,柱温:30℃,检测波长240nm.结果 Herpetrione在...     

波棱甲素纳米混悬剂胶囊的制备及体外溶出度测定

目的研究波棱甲素纳米混悬剂的制备及其胶囊体外溶出度的测定。方法采用高压均质法制备波棱甲素纳米混悬剂,并分别将波棱甲素纳米混悬剂和波棱甲素物理混合物制成胶囊,以pH 7.5的磷酸盐缓冲液为溶出介质,采用桨法测定体外溶出度,比较波棱甲素纳米混悬剂胶囊和波棱甲素物理混合物胶囊的溶出速率和溶出量。结果采用高压均质法制备的波棱甲素纳米混悬剂胶囊的体外累积溶出度明显高于波棱甲素物理混合物胶囊(P<0.01)。结论高压均质法制备波棱甲素纳米混悬剂的工艺简单易行,波棱甲素纳米混悬剂能显著提高药物的体外溶出度。     

Herpetrione纳米混悬剂的制备及药动学初步研究

 目的 本实验制备了herpetrione纳米混悬剂(PEDX-NS),并进行了大鼠体内药动学研究。方法 采用高压均质法制备herpetrione纳米混悬剂,考察纳米混悬剂的形态及粒径分布。以herpetrione(PEDX)为指标成分,采用HPLC测定大鼠灌胃给药后的血药浓度,用DAS2.0药动学软件计算药动学参数。结果 制得的纳米混悬剂呈不规则球形,平均粒径为(238.6±1.9) nm,多分散度指数为（0.183±0.017）。herpetrione在大鼠体内动力学行为符合二室模型。herpetrione纳米混悬剂药-时曲线下面积(AUC)为25.19 μg·h·mL^-1,达峰浓度(ρ_max)为11.64 μg·mL^-1,与参比药herpetrione普通混悬剂(PEDX-S)相比,分别提高了2.47倍和2.63倍(P<0.01)。结论 高压均质法制备herpetrione纳米混悬剂工艺简单可行,herpetrione纳米混悬剂能显著提高药物体内生物利用度。     

Lignans-Rich Extract from Herpetospermum caudigerum Alleviate Physical Fatigue in Mice

Objective

To ascertain anti-fatigue constituents and mechanisms of Herpetospermum caudigerum.

Methods

The 80% ethanol extracts of Herpetospermum caudigerum were partitioned with chloroform, ethyl acetate and n-butanol, respectively. Male Kunming mice were divided into 13 groups with 16 mice in each group: a control group fed with water, 9 groups treated with 3 fractions of Herpetospermum caudigerum (chloroform fraction, ethyl acetate fraction and n-butanol fraction) at dose of 80, 160 and 320 mg/kg for the low-dose group, medium-dose group and high-dose group, 3 herpetrione (HPE) treated groups fed with HPE at dose of 15, 30, and 60 mg/kg for the low-dose group, medium-dose group and high-dose group. All animals were treated once per day for 30 days. Anti-fatigue activity was assessed through the forced swimming test and serum biochemical parameters including blood lactic acid (BLA), blood urea nitrogen (BUN), malondialdehyde (MDA), hepatic glycogen (HG), lactic dehydrogenase (LDH), superoxide dismutase (SOD) and glutathione peroxidase (GPx) determined following the recommended procedures provided by the commercial kits.

Results

Compared with the control group, the lignans extract (ethyl acetate fraction) of Herpetospermum caudigerum and HPE could signifificantly prolonged the exhaustive swimming time (P<0.05 or P<0.01), and also increased the HG levels (P<0.05 or P<0.01) and the activities of antioxidant enzymes (SOD, GPx and LDH, P<0.05 or P<0.01); BLA and MDA levels were decreased considerably in lignans extract and HPE treated groups (P<0.05 or P<0.01). HPE also could significantly decrease the BUN contents compared with the control group (P<0.05). The chloroform and n-butanol fraction showed no effect on swimming time and biochemical parameters.

Conclusions

The lignans extract had antifatigue activities and HPE may be partly responsible for the anti-fatigue effects of Herpetospermum caudigerum. The possible mechanisms of anti-fatigue activity were related to the decrease of BUN and BLA, the increase of the HG storage and protecting corpuscular membrane by preventing lipid oxidation via modifying several enzyme activities.

     

波棱甲素纳米混悬剂对D-半乳糖胺诱导的小鼠急性肝损伤的保护作用

 目的 研究波棱甲素纳米混悬液（HNS）对D-半乳糖胺（D-GalN）诱导的小鼠急性肝损伤的保护作用,并与波棱甲素普通混悬剂（HS）进行比较。方法 小鼠每日给药2次,连续给药3.5 d后,一次性腹腔注射D-GalN 800 mg·kg-1造成急性肝损伤模型,20 h后取血清测定丙氨酸基转移酶（ALT）、天冬氨酸氨基转移酶（AST）值。结果 HNS各个剂量组均能显著降低中毒小鼠ALT、AST含量,HS仅高剂量组ALT、AST值显著降低,且同等剂量下,HNS各组均明显优于HS各组;病理检查结果显示,波棱甲素具有明显的保肝作用。结论 HNS对D-GalN诱导的小鼠急性肝损伤具有明显的保护作用,且作用明显优于普通混悬剂。其机制可能在于将其制成纳米混悬剂之后,粒径减小,表面积增大,体内吸收增加,从而使它的药效作用增强。     

波棱甲素纳米混悬剂胶囊的制备及体外溶出度测定

目的 研究波棱甲素纳米混悬剂的制备及其胶囊体外溶出度的测定。方法 采用高压均质法制备波棱甲素纳米混悬剂,并分别将波棱甲素纳米混悬剂和波棱甲素物理混合物制成胶囊,以pH 7.5的磷酸盐缓冲液为溶出介质,采用桨法测定体外溶出度,比较波棱甲素纳米混悬剂胶囊和波棱甲素物理混合物胶囊的溶出速率和溶出量。结果 采用高压均质法制备的波棱甲素纳米混悬剂胶囊的体外累积溶出度明显高于波棱甲素物理混合物胶囊（P＜0.01）。结论 高压均质法制备波棱甲素纳米混悬剂的工艺简单易行,波棱甲素纳米混悬剂能显著提高药物的体外溶出度。     

Box-Behnken设计-效应面法优化波棱甲素新型纳米混悬速溶膜

目的 研制一种能提高水难溶性药物波棱甲素（herpetrione,HPE）口服生物利用度的新剂型——纳米混悬口腔速溶膜（nanosuspension orodispersible film,NS-ODF）,并优化其处方。方法 采用高压均质法制备纳米混悬剂（NS）,进一步制成口腔速溶膜（orodispersible film, ODF）。以羟丙甲纤维素（hydroxy-propyl methyl cellulose,HPMC）、低取代羟丙基纤维素（low-substituted hydroxypropyl cellulose,L-HPC）和微晶纤维素（microcrystalline cellulose,MCC）用量为考察因素,以崩解时间、5 min时累积释放度和膜复溶后的纳米粒粒径为指标,采用Box-Behnken设计试验优化HPE-NS-ODF的处方。结果 以最优处方：50 g/L HPMC、5 g/L L-HPC、1.2 g/L MCC制得的HPE-NS-ODF崩解时间为（14.19±0.61）s,5 min时药物体外释放度为（76.08±3.79）%,膜复溶后的纳米粒粒径为（289.64±5.92）nm,理论预测值与实测值偏差较小,模型具有良好的预测性。结论 采用Box-Behnken效应面法优化HPE-NS-ODF处方是有效、可行的,NS-ODF结合NS和ODF的双重优点,具有广阔的应用前景。     

不同粒径波棱甲素纳米混悬剂的制备及药动学研究

目的制备不同粒径波棱甲素纳米混悬剂(herpetrionenanosuspension,Her-NS),并探讨粒径对Her-NS口服生物利用度的影响。方法采用反溶剂沉淀法制备2种不同粒径Her-NS,采用单因素实验以平均粒径、多分散系数、稳定性指数为评价指标优化处方工艺参数,扫描电子显微镜(SEM)观察Her-NS形态,X射线衍射(XRD)分析晶型,透析法研究体外释放特性。通过SD大鼠比较2种不同粒径Her-NS口服药动学差异。结果以P188、P407为稳定剂分别制备了200、450 nm 2种不同粒径Her-NS(Her-NS₂₀₀、Her-NS₄₅₀),SEM显示2种粒径的Her-NS均为球状,XRD分析表明2种粒径Her-NS均为无定型态。体外释放度与药动学结果显示,与波棱甲素原料药比较,2种粒径Her-NS的累积释放度明显提高,Her-NS的达峰浓度(C_max)、药时曲线下面积(AUC_0～t)均显著提高;Her-NS200的C_max、AUC_0～t均...     

一测多评法在肝能滴丸质量控制中的应用研究

目的建立一测多评法同时测定肝能滴丸及其原料药中8种成分(去氢双松柏醇、波棱醇I、波棱内酯A、波棱甲素、波棱素、herpetetrone、波棱酮、波棱乙素)的含量。方法采用HPLC法,以波棱甲素为内参物,建立波棱甲素与其他7种指标成分的相对校正因子(f_(k/m)),并计算各待测成分的量。同时采用外标法测定5批肝能滴丸及原料药中这8种成分的含量,比较一测多评法所得的计算值与实测值之间的差异,以验证建立的一测多评法的准确性与可行性。结果在一定线性范围内,波棱甲素与去氢双松柏醇、波棱醇I、波棱内酯A、波棱素、herpetetrone、波棱酮、波棱乙素的f_(k/m)分别为0.908、0.728、0.516、0.720、0.461、0.623、0.410,在不同情况下重现性良好;5批肝能滴丸及原料药的计算值与实测值无显著性差异。结论以波棱甲素为内参物,同时测定肝能滴丸及原料药中8种成分含量的一测多评方法可靠,结果准确,可用于肝能滴丸的质量控制。