高效液相色谱法测定养胃颗粒中橙皮苷的含量

目的:建立高效液相色谱法测定养胃颗粒中橙皮苷含量。方法:采用Agela Venusil MP C18色谱柱(250mm×4.6mm,5μm),以甲醇-醋酸溶液(每1000mL水中含冰醋酸25mL)(35∶65)为流动相,流速为1.0mL/min,检测波长为284nm,柱温:30℃。结果:橙皮苷进样量在0.03508～0.5613μg(r=0.9999)范围内与峰面积积分值具有良好线性关系,平均加样回收率为98.87%,RSD为1.38%(n=6)。结论:该法简便、灵敏、准确可靠,可用于该药的含量测定。     

Effects of storage conditions and heat treatment on the hesperidin concentration in Newhall navel orange (Citrus sinensis Osbeck cv. Newhall) juice

The effects of storage condition and heat treatment on the hesperidin concentration in Newhall navel orange (Citrus sinensis Osbeck cv. Newhall) juice were investigated systematically in the present study. Our results indicated that, 1) the hesperidin concentration in orange juice gradually decreased during storage, even when the juice was stored at low temperature; 2) hesperidin was stable in juice subjected to either heat or concentrating treatment; 3) the total content of hesperidin in juice remained almost unchanged, although the hesperidin would gradually settle out from the juice, possibly caused by the decomposition of vitamin C during storage, resulting in the reduction of hesperidin concentration in juice. The experimental observations in this study might help clarify some inconsistent reports on hesperidin content in the literature and provide valuable information for the measurement of hesperidin in orange juice. Meanwhile, the results of our study suggested that the hesperidin content in juice should not be considered as a marker for identification of NFC (not from concentrate) orange juice.     

Anti-allergic effect of a combination of Citrus unshiu unripe fruits extract and prednisolone on picryl chloride-induced contact dermatitis in mice

Effect of 50% ethanolic extract of unripe fruits of Citrus unshiu (CU-ext) on type IV allergic reaction was examined by inhibitory activity of ear swelling of picryl chloride-induced contact dermatitis (PC-CD) in mice. Oral administration of CU-ext and subcutaneous administration of prednisolone showed inhibition of ear swelling during both induction and effector phases of PC-CD. The inhibitory activities of combinations of CU-ext (p.o.) and prednisolone (s.c.) during induction phase of PC-CD were more potent than those of CU-ext alone and prednisolone alone. Successive oral administration of hesperidin, a major flavanone glycoside of CU-ext, inhibited ear swelling during induction phase of PC-CD. The inhibitory activities of combinations of hesperidin (p.o.) and prednisolone (s.c.) were more potent than those of hesperidin alone and prednisolone alone. These results indicated that the combinations of prednisolone and CU-ext or hesperidin exerted a synergistic effect.     

橙皮苷对小鼠抗氧化作用及抗氧化酶基因表达的影响

目的 探讨橙皮苷(HDN)对机体抗氧化作用的影响。方法 采用分光光度法、邻苯三酚自氧化法和Fe²⁺-邻二氮菲法检测HDN体外清除自由基、抑制线粒体肿胀和红细胞氧化溶血;实验小鼠灌服不同浓度HDN(0、80、160、320 mg/kg)连续12 d,ELISA和分光光度法检测小鼠组织中MDA含量,抗氧化酶(SOD、CAT、GSH-PX)活力,RT-PCR技术分析抗氧化物酶mRNA表达水平。结果 与对照组比较,HDN组自由基(·OH、O₂^-·、DPPH·)清除率明显提高,小鼠红细胞体外氧化溶血和线粒体肿胀显著降低;小鼠组织及血清中MDA含量降低,抗氧化酶SOD、CAT、GSH-PX活力明显高于对照组,组织中抗氧化酶mRNA(SOD、CAT、GSH-PX)表达上调。结论 HDN能够清除自由基,降低自由基引起的细胞氧化损伤,抑制过氧化物生成,上调抗氧化酶基因表达及提高酶活力,呈现良好的抗氧化作用。     

肠泰口服液工艺研究

以橙皮甙为指标,采用正交试验对制剂水提取工艺和醇沉工艺,及其中试产品的稳定性进行了考察,优选出肠泰口服液的最佳生产工艺。     

HPLC测定健脾消食颗粒中橙皮苷的含量

目的建立健脾消食颗粒中橙皮苷的含量测定方法。方法采用HPLC法,Diamomil C18色谱柱,乙腈-0．01％磷酸溶液(19．5：80．5)为流动相,检测波长284mm。结果橙皮苷对照品在0．07—0．48μg范围内呈良好的线性关系(r=0．9998),平均加样回收率为95．99％,RSD=0．62％(n=6)。结论所用方法简便、准确、重复性好,可作为该制剂的含量测定方法。     

HPLC测定理气健脾颗粒中橙皮苷的含量

目的:建立HPLC测定理气健脾颗粒中橙皮苷的含量。方法:色谱柱:Beckman ODS C18柱(4.6mm×250mm,5μm);流动相:乙腈-0.2%磷酸(20∶80);流速:1.0mL·min-1;检测波长:284nm。结果:橙皮苷进样量的线性范围0.040~0.40μg(r=0.9998),平均加样回收率为100.49%,RSD=1.66%(n=6)。结论:本法灵敏、准确、快速,可用于理气健脾颗粒的质量控制。     

小承气汤中橙皮苷和肉桂酸的含量测定

目的:建立小承气汤中橙皮苷和肉桂酸的HPLC同时测定方法,以便进行质量控制。方法:采用Apollo C18柱(250mm×4.6mm,5μm),流动相为乙腈和0.011%冰乙酸水溶液,梯度洗脱,时间40min,流速1mL/min,检测波长为283nm。结果:橙皮苷和肉桂酸的线性范围分别为0.20-0.80μg和0.05-0.33μg,精密度为0.24%和0.16%,平均回收率分别为96.3%和101.9%。在6批样品中,橙皮苷和肉桂酸的含量差别比较大。结论:文章建立的方法简便、灵敏、准确,可用于小承气汤的质量控制。     

橙皮苷对糖尿病大鼠心泵功能和心率变异性的影响

目的:研究橙皮苷对链佐星(STZ)诱发的糖尿病大鼠心泵功能和心率变异性(HRV)的影响并初步探讨其作用机制。方法:30只大鼠随机分为对照组(n=6)、糖尿病组(n=12)和橙皮苷治疗组(n=12)。运用Langerdorff灌流糖尿病鼠离体心脏HRV功率谱分析等方法,观察橙皮苷对糖尿病大鼠的心脏收缩力、冠状动脉(冠脉)流量、心电图QRS波及HRV的影响。结果:橙皮苷10×10-6 mol/L可增加离体大鼠心脏冠脉流量106.0%,并使心肌收缩力增加87.3%,QRS波宽缩短33.3%。糖尿病鼠的心率加快,窦性RR间期的标准差(SDNN)减小,交感神经、迷走神经紧张性低频/高频比(LF/HF)增大,而橙皮苷处理后,心率、SDNN和LF/HF值均有所恢复。结论:橙皮苷可改善STZ诱发糖尿病大鼠的冠脉循环和心泵功能,并逆转由糖尿病引起的HRV变化。     

高效液相色谱法测定二十七味定坤丸中橙皮苷的含量

目的建立高效液相色谱法测定二十七味定坤丸中橙皮苷的含量。方法Agela Promosil C18（250mm×4mm,5μm）分析柱,流动相为乙腈-水-冰醋酸（15：84：1）,流速为1．0mL·min^-1,检测波长为284nm。结果橙皮苷线性范围为0．255～3．066μg（r=09998）;平均回收率为98．82％,RSD=0．42％（n=6）。结论本法简便、准确可靠,可用于该药的质量控制。