PCL-PEG-PCL载姜黄素纳米粒子的制备以及体外药物释放的考察

目的制备一种生物可降解、生物相容性良好的姜黄素纳米粒子,并对其体外药物释放行为进行考察。方法采用开环聚合法制备生物可降解的PCL-PEG-PCL三嵌段聚合物,然后采用乳液挥发法制备负载姜黄素的PCL-PEG-PCL纳米粒子,通过透射电镜观察所制备纳米粒子的形貌特征,动态光散射(DLS)测定粒径,采用HPLC测定纳米粒子的包封率和载药量,同时考察其体外药物释放行为。结果姜黄素纳米粒子具有球形结构,粒径在200 nm左右,载药量为(14.23±0.35)%,3 d体外累积释药量65%。结论所制备的姜黄素纳米粒子具有较高的载药量和包封率,同时体外药物释放实验证实姜黄素纳米粒子具有良好的缓释功能。     

抗人转铁蛋白受体单克隆抗体增强姜黄素对雄激素非依赖性前列腺癌的抑制效应

目的检测抗人转铁蛋白受体单克隆抗体(TfR mAb)对雄激素非依赖性前列腺癌细胞生物学行为的影响,了解抗人TfR mAb对姜黄素抗瘤作用的协同效应。方法利用杂交瘤细胞株制备抗人TfR mAb,分别采用CFSE染色、AnnexinⅤ-PI染色和PI染色法流式细胞仪检测抗人TfR mAb对PC-3细胞增殖、凋亡和细胞周期的影响。采用FITC标记的鼠抗人TfR mAb检测姜黄素对雄激素非依赖性前列腺癌细胞表面TfR表达的影响。采用流式细胞仪进一步检测抗人TfR mAb联合姜黄素对PC-3细胞增殖、凋亡和细胞周期的影响。结果抗人TfR mAb对PC-3细胞增殖、凋亡和细胞周期无明显影响(均P>0.05)。姜黄素能够显著上调雄激素非依赖性前列腺癌细胞表面TfR表达(P<0.05)。抗人TfR mAb可显著增强姜黄素对PC-3细胞凋亡的诱导作用(P<0.05),而不影响姜黄素对PC-3细胞增殖和细胞周期的影响(均P>0.05)。结论姜黄素可导致雄激素非依赖性前列腺癌细胞表面TfR表达增高。抗人TfR mAb单独作用对雄激素非依赖性前列腺癌细胞的生物学行为无显著影响,但抗人TfR mAb可以增强姜黄素对雄激素非依赖性前列腺癌细胞的凋亡效应。     

高效液相色谱法测定姜黄颗粒中姜黄素成分含量

目的 建立姜黄素高效液相测定方法,测定姜黄颗粒中姜黄素成分含量;方法 采用RP-HPLC,色谱柱Shimpack VP-ODS (4.6mm*150mm,5μm);流动相:乙腈-4％冰醋酸(48:52);检测波长:430hm;流速:1mL· min-1;柱温30℃.结果 姜黄素的进样浓度在2.104～105.2μg·mL-1范围内与峰面积积分值呈良好线性关系(r=0.9998);平均加样回收率为99.68％,RSD=1.34％(n=9);结论 该法稳定、简便,可用于姜黄颗粒的质量控制.     

Kinetic Profile of Amyloid Formation in the Presence of an Aromatic Inhibitor by Nuclear Magnetic Resonance

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姜黄素类化合物体外抗凝血与抗血栓作用研究

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Inhibition of Ca2+-release-activated Ca2+ channel (CRAC) and K+ channels by curcumin in Jurkat-T cells

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