文献:Enhanced cytotoxic and apoptotic potential in hepatic carcinoma cells of chitosan nanoparticles loaded with ginsenoside compound K
文献链接:https://xueshu.baidu.com/usercenter/paper/show?paperid=e10f827e04856cbc6b62368af4625891&site=xueshu_se
作者:Jianmei Zhanga,, Yijun Wang, Yunyao Jiang, Tingwu Liu, Yanyan Luo, Enjie Diao,Yufeng Cao, Liang Chen, Liang Zhanga, Qian Gu, Jinyi Zhou, Fengting Sun,Wancai Zheng, Jianxun Liuc,, Xueqin
Lid,Weicheng Hua
相关产品:
Cy5.5-CK-NPs 菁染料Cy5.5-壳聚糖纳米颗粒
原文摘要:Ginsenoside compound K (CK) has been shown to exhibit anticancer properties. In this study, chitosan nanoparticles loaded with ginsenoside compound K (CK-NPs) were prepared as a delivery system using a self-assembly technique with amphipathic deoxycholic acid-O
carboxymethyl chitosan as the carrier, which improved the water solubility of CK. By evaluating drug loading, entrapment efficiency, and in vitro release behavior, the feasibility of CK-NPs as a drug carrier nanoparticle for the treatment of human hepatic carcinoma cells (HepG2) was investigated. Result revealed that CK and CK-NPs showed a dose-dependent inhibitory effect on HepG2 cells with IC50 values of 23.33 and 16.58 μg/mL, respectively. Furthermore, fluorescence imaging demonstrated that CK-NPs promoted cellular uptake in vitro. Therefore, all results indicated that CK-NPs might be a novel drug delivery system to improve the solubility and enhance the cytotoxic and apoptotic potentials of CK for effective liver cancer chemotherapy.
Cy5.5 NHS ester是一种荧光标记试剂。外观为深蓝色固体,分子量为767.66,分子式为C₄₄H₄₆N₃BF₄O₄。具有较高的消光系数,在675nm左右有较强的吸收峰,发射波长约为710nm,处于近红外区域。这种近红外荧光不易被生物组织的背景荧光干扰,并且在生物组织中的穿透深度较大,可用于深层组织的检测。分子中的NHS(N-羟基琥珀酰亚胺)酯基团能够与生物大分子(如肽、蛋白质、寡核苷酸等)中的氨基发生共价结合反应,从而实现对这些生物分子的荧光标记。应用于生物医学研究中的荧光成像等领域。以两亲性脱氧胆酸-o羧甲基壳聚糖为载体,采用自组装技术制备了含有人参皂苷化合物K(CK-NPs)的壳聚糖纳米颗粒作为传递体系,提高了CK的水溶性。过程如下:
图:HepG2细胞在不同时间摄取Cy5.5-labeled CK-NPs的共聚焦荧光图像
用DA修改OCMC
OCMC与DA修饰的反应如图。将OCMC溶解在甲醇溶液中。然后,在不断搅拌下滴加入不同数量的活化DA(OCMC的糖残基)。在无水DMSO中加入等量的EDC和NHS加入溶液中,孵育。然后将混合物轻轻搅拌,用过量的蒸馏水/甲醇混合物透析,然后用透析袋与蒸馏水透析。
图:脱氧胆酸-O羧甲基壳聚糖(DA-OCMC)(A).的合成负载ck的纳米颗粒(B)的自组装过程
空白NPs、CK-NPs和Cy5.5标记的CK-NPs的制备
采用超声法和自组装法制备了DA-OCMC的NPs。将DA-OCMC分散在蒸馏水中,搅拌。将不同量的CK溶解在甲醇中,在室内搅拌一夜后,在剧烈搅拌下滴加入悬浮液中超声,超声处理是在冰浴中进行的,以防止温度的升高。然后,使用透析袋用过量的蒸馏水对样品进行透析,以去除甲醇和过量的CK。最后,使用膜过滤器过滤溶液。按照上述方法制备空白NPs和Cy5.5标记的CK-NPs。
图:Cy5.5-labeled CK-NPs在细胞内摄取的定量分析。
结论:CK和Cy5.5标记的CK-NPs对HepG2细胞的抑制呈剂量依赖性抑制作用,半抑制浓度值分别为23.33和16.58 μg/mL。此外,荧光成像显示CK-NPs在体外促进细胞摄取。因此,所有结果表明,CK-NPs可能是一种给药系统,可提高CK的溶解度,提高细胞有害性和Apoptosis 潜能。