Laboratory for Polymer Analysis, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences & Technology, Poojapura, Trivandrum 695 012, India.
J Colloid Interface Sci. 2012 Feb 15;368(1):144-51. doi: 10.1016/j.jcis.2011.11.024. Epub 2011 Nov 29.
Curcumin (Cur) shows low anticancer activity in vivo due to its reduced systemic bioavailability stemmed from its poor aqueous solubility and instability. Suitably functionalized nanocarriers designed to empty the drug specifically at tumor sites can potentially enhance the antitumor activity of Cur. We devised a simple method for the fabrication of water soluble Cur conjugated gold nanoparticles to target various cancer cell lines. Cur was conjugated to hyaluronic acid (HA) to get a water soluble conjugate (HA-Cur). We generated gold nanoparticles (AuNPs) by reducing chloroauric acid using HA-Cur, which played the dual role of a reducing and stabilizing agent and subsequently anchored folate conjugated PEG. These entities were probed using different analytical techniques, assayed the blood compatibility and cytotoxicity. Their interaction with cancer cell lines (HeLa cells, glyoma cells and Caco 2 cells) was followed by flow cytometry and confocal microscopy. Blood-materials interactions studies showed that the nanoparticles are highly hemocompatible. Flow cytometry and confocal microscopy results showed significant cellular uptake and internalization of the particles by cells. HA-Cur@AuNPs exhibited more cytotoxicity comparing to free Cur. The strategy, we adopted here, resulted the formation blood compatible Cur conjugated AuNPs with enhanced targeting and improved efficacy.
姜黄素(Cur)由于其较差的水溶性和不稳定性,导致其全身生物利用度降低,体内抗癌活性较低。设计适当功能化的纳米载体,使其能够在肿瘤部位特异性释放药物,可能会增强姜黄素的抗癌活性。我们设计了一种简单的方法来制备水不溶性姜黄素结合金纳米颗粒,以靶向各种癌细胞系。将姜黄素与透明质酸(HA)结合得到水溶性结合物(HA-Cur)。我们使用 HA-Cur 还原氯金酸生成金纳米颗粒(AuNPs),HA-Cur 同时起到还原和稳定的作用,随后固定叶酸偶联的聚乙二醇。使用不同的分析技术对这些物质进行了研究,检测了血液相容性和细胞毒性。通过流式细胞术和共聚焦显微镜研究了它们与癌细胞系(HeLa 细胞、神经胶质瘤细胞和 Caco-2 细胞)的相互作用。血液材料相互作用研究表明,纳米颗粒具有高度的血液相容性。流式细胞术和共聚焦显微镜的结果表明,细胞对颗粒的摄取和内化作用显著。与游离姜黄素相比,HA-Cur@AuNPs 表现出更高的细胞毒性。我们采用的策略导致形成了具有增强靶向性和疗效的血液相容性姜黄素结合金纳米颗粒。
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