Department of Nano, Medical and Polymer Materials, School of Chemical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan 38541, South Korea.
Department of Nano, Medical and Polymer Materials, School of Chemical Engineering, Yeungnam University, 280 Daehak-Ro, Gyeongsan 38541, South Korea.
Int J Biol Macromol. 2018 Jun;112:119-125. doi: 10.1016/j.ijbiomac.2018.01.163. Epub 2018 Jan 31.
In this work, we propose biofriendly in-situ preparation method of Au NPs (hexagonal and rod-shape structures) in the lumen as well as the surface cage of biocompatible halloysite nanotubes (HNTs) using curcumin (CUR) as anticancer drug and subsequently coating with bio-adhesive chitosan (CS) as a polysaccharide. The formation of Au NPs and their interactions with CUR and CS exist in the HNTs has been characterized by FTIR, XRD, XPS, STEM techniques. Interestingly, Au NPs showed longitudinal plasmon resonance bands at 760 and 980 nm that indicate the near-infrared (NIR) responsive property of hybrid nanoparticles. Rod shape and hexagonal structures of Au NPs were produced as confirmed by TEM images. The loading efficiency of CUR was found as much as 12%. Importantly, more CUR release was achieved under acidic conditions (pH 5.5) than basic conditions (pH 7.4). The anticancer potential of HNT hybrid nanoparticles on MCF-7 cancer cells was studied and showed efficient anticancer activity under intracellular tumor cell environment (pH 5.5) than extracellular conditions (pH 7.4). Moreover, the developed HNT hybrid nanoparticles consisting of Au NPs (NIR responsive property) and pH-responsive CUR release could make it suitable for cancer cell-targeted drug delivery platform with NIR-imaging.
在这项工作中,我们提出了一种生物友好的原位制备方法,即在生物相容性的海泡石纳米管(HNTs)的管腔内部以及表面笼中制备金纳米颗粒(Au NPs,具有六边形和棒状结构),使用姜黄素(CUR)作为抗癌药物,随后用生物粘附性壳聚糖(CS)作为多糖进行涂层。通过傅里叶变换红外光谱(FTIR)、X 射线衍射(XRD)、X 射线光电子能谱(XPS)和扫描透射电子显微镜(STEM)技术对 Au NPs 的形成及其与 CUR 和 CS 的相互作用进行了表征。有趣的是,Au NPs 在 760 和 980nm 处表现出纵向等离子体共振带,表明了混合纳米粒子的近红外(NIR)响应特性。TEM 图像证实了 Au NPs 呈棒状和六方结构。CUR 的负载效率高达 12%。重要的是,在酸性条件(pH 5.5)下,CUR 的释放量比碱性条件(pH 7.4)下更多。研究了 HNT 杂化纳米粒子对 MCF-7 癌细胞的抗癌潜力,结果表明在细胞内肿瘤细胞环境(pH 5.5)下,其具有比细胞外条件(pH 7.4)更有效的抗癌活性。此外,由具有 NIR 响应特性的 Au NPs 和 pH 响应性 CUR 释放组成的开发的 HNT 杂化纳米粒子,可以使其成为适用于具有 NIR 成像的癌细胞靶向药物输送平台。
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