黄连素对代谢综合征胰岛素敏感性的影响

[目的]观察黄连素对代谢综合征胰岛素敏感性的影响。[方法]68例患者在常规控制饮食基础上,服用黄连素,并观察治疗前后血脂、血压、腰围及胰岛素敏感指数的变化。[结果]治疗后血脂、血压、腰围及胰岛素敏感性均有显著改善（P〈0.01）。[结论]黄连素治疗代谢综合症有较好的疗效。     

黄连素预处理对大鼠心肌缺血再灌注损伤的保护作用

目的:探讨黄连素预处理对心肌缺血再灌注损伤的保护作用及机制。方法:60只SD大鼠被随机分为3组:假手术组、缺血再灌注损伤组、黄连素预处理组;黄连素预处理组给予黄连素腹腔注射,假手术组和缺血再灌注组腹腔注射等量生理盐水,均连续腹腔注射7 d,末次于冠脉结扎前2 h腹腔注射给药。于左冠状动脉前降支中上1/3处结扎,结扎1 h后剪开结扎线,再灌注2 h。检测心肌组织中超氧化物歧化酶(SOD)活性、丙二醛(MDA)含量及血清LDH和CK水平;测定心肌梗死面积。结果:与缺血再灌注组比较,黄连素预处理组SOD活性显著升高(P<0.05)、心肌梗死面积、MDA、LDH、CK含量均显著降低(P<0.05或P<0.01)。结论:黄连素预处理对大鼠心肌缺血再灌注损伤具有保护作用,其机制可能与增加SOD活性、增强心肌抗氧化能力、稳定心肌细胞膜电位有关。     

HPLC法测定双黄消炎片中盐酸小檗碱的含量

目的:建立双黄消炎片中盐酸小檗碱的含量测定HPLC方法;方法:Diomansil C_(18)柱(250mm×4.6mm,5μm),乙腈: 0.1%磷酸溶液(50:50)(每100 ml加十二烷基磺酸钠0.1g)为流动相,检测波长265nm;流速1.0ml·min~(-1)。结果:线性范围1.0～76.6μg·ml~(-1)(r=0.999 9)线性关系良好,平均回收率为102.4%,RSD为1.0%(n=6)。结论:方法简便快捷,可用于双黄消炎片的质量控制。     

Ameliorative effect of berberine on endothelial dysfunction in diabetic rats induced by high-fat diet and streptozotocin

Berberine can improve insulin resistance, lower blood glucose, and regulate lipid metabolism disorders which cause endothelial dysfunction, leading to vascular complications of type 2 diabetes mellitus. The aim of the present study was to investigate the effects of berberine on endothelial dysfunction of aortas in type 2 diabetes mellitus rats and its mechanism. Wistar rats were randomly divided into four groups: diabetic rats, control rats, diabetic rats treated with berberine (100 mg/kg), and control rats treated with berberine. The serum fasting blood glucose, insulin, total cholesterol, triglyceride and nitric oxide (NO) levels were tested. Acetylcholine-induced endothelium-dependent relaxation and sodium nitroprusside induced endothelium-independent relaxation were measured in aortas for estimating endothelial function. The expression of endothelial nitric oxide synthase (eNOS) mRNA was measured by RT-PCR, and the protein expressions of eNOS and NADPH oxidase (NOX4) were analyzed by western blot. The results showed that berberine significantly decreased fasting blood glucose, and triglyceride levels in diabetic rats. Berberine also improved endothelium-dependent vasorelaxation impaired in aorta. The expressions of eNOS mRNA and protein were significantly increased, while NOX4 protein expression was decreased in aortas from diabetic rats with berberine treatment. Moreover, serum NO levels were elevated after berberine treatment. In conclusion, berberine restores diabetic endothelial dysfunction through enhanced NO bioavailability by up-regulating eNOS expression and down-regulating expression of NADPH oxidase.     

HPLC法测定三黄片中盐酸小檗碱、大黄素和大黄酚含量的结果分析

目的:考察市售三黄片的质量。方法:以19批三黄片为样品,采用高效液相色谱法测定样品中盐酸小檗碱、大黄素和大黄酚的含量。色谱柱均为SysmetryC18柱,流动相为乙腈-0.05%十二烷基硫酸钠(含0.1%磷酸)=48:52和甲醇-0.1%磷酸溶液=85:15,流速均为1.0mL·min-1,检测波长为265nm和254nm,进样量为5μL和10μL,柱温均为35℃。结果:所有样品均符合规定,但产品质量存在较大差异。结论:需加大对市售三黄片的质量监督,确保临床用药安全、有效。     

HPLC法测定康妇膜中盐酸小檗碱的含量

目的:建立测定康妇膜中盐酸小檗碱含量的方法。方法:采用高效液相色谱法。色谱柱为Agilent extend C18(150mm×4.6mm,5μm),流动相为乙腈-0.1%磷酸溶液(50:50,每100mL加十二烷基磺酸钠0.1g),柱温为30℃,流速为1.0mL·min-1,检测波长为265nm,结果:盐酸小檗碱进样量在0.12825～0.76590μg范围内与峰面积积分值呈良好的线性关系(r=0.9999);平均加样回收率为98.04%,RSD=1.20%(n=6)。结论:本方法简便、准确、重复性好,可用于康妇膜的质量控制。     

Influences of Fructus evodiae pretreatment on the pharmacokinetics of Rhizoma coptidis alkaloids

Ethnopharmacological relevance

Rhizoma coptidis is a traditional Chinese medicine with pharmacological properties. It is usually prescribed with Fructus evodiae as traditional Chinese medicine (TCM) formulas. Here we report the influences of Fructus evodiae on the pharmacokinetics of the Rhizoma coptidis alkaloids and propose possible mechanisms.

Materials and methods

Pharmacokinetic experiments were performed in rats. In vitro absorption experiments were performed in everted rat gut sacs, while in vitro metabolism experiments and determination of hepatic UDP-glucuronosyltransferase (UGT) 1A1 mRNA expression were performed in rat liver microsomes.

Results

Pretreatment with Fructus evodiae extract for two weeks decreased the systemic exposure of the Rhizoma coptidis alkaloids. This effect was not due to inhibition of absorption or enhanced hepatic phase I metabolism of the Rhizoma coptidis alkaloids. However, Fructus evodiae pretreatment enhanced both the activity and expression of hepatic UGT1A1.

Conclusions

The results showed that Fructus evodiae pretreatment decreased the systemic exposure of the Rhizoma coptidis alkaloids by inducing hepatic UGT1A1.     

HPLC法同时测定黄连解毒汤中3种有效成分的含量

目的:建立以高效液相色谱法同时测定黄连解毒汤中黄芩苷、盐酸小檗碱、栀子苷含量的方法。方法:色谱柱为岛津Sim-packVP-ODSC18(250mm×4.6mm,5μm),流动相为乙腈-0.05%磷酸二氢钾+0.05%三乙醇胺溶液(磷酸调pH3.0,梯度洗脱),检测波长为254nm。结果:栀子苷、盐酸小檗碱、黄芩苷的检测浓度分别在0.4～2.0mg.mL-1(r=0.9981)、0.020～0.40mg.mL-1(r=0.9920)、0.020～0.40mg.mL-1(r=0.9963)范围内与各自峰面积积分值呈良好的线性关系;三者加样回收率分别为99.8%、97.5%、98.1%,RSD分别为1.8%、2.5%、1.5%(n均=6)。结论:本方法专属性强、灵敏度高、操作简便,适用于黄连解毒汤类制剂的质量控制。     

复方金黄痔疮软膏的薄层鉴别

目的建立复方金黄痔疮软膏中君药的定性鉴别方法,为制定其质量标准提供依据。方法采用薄层色谱法对软膏中的有效成分黄柏进行定性分析。结果供试品与标准品,对照药材薄层图谱斑点相同并清晰,均能鉴别出黄柏。结论薄层色谱专属性强,操作简便,重现性好,可用于复方金黄痔疮软膏的质量控制。     

双歧杆菌四联活菌片联合黄连素治疗腹泻型肠易激综合征的临床疗效观察

目的观察双歧杆菌四联活菌片联合黄连素治疗腹泻型肠易激综合征的疗效和安全性。方法将64例腹泻型肠易激综征患者分为两组,每组病例32例,治疗组为双歧杆菌四联活菌片联合黄连素;对照组为黄连素,治疗2周后进行疗效对比。结果联合治疗组总有效率为93．75％。对照组总有效率为68．75％。联合治疗组总有效率明显优于对照组（P〈0．05）。两组患者均未发现明显不良反应。结论双歧杆菌四联活片联合黄连素治疗腹泻型肠易激综合征安全有效,值得进一步临床推广使用。