Drug delivery represents one of the most important research fields within the pharmaceutical industry. Different strategies are reported every day in a dynamic search for carriers with the ability to transport drugs across the body, avoiding or decreasing toxic issues and improving therapeutic activity. One of the most interesting strategies currently under research is the development of drug delivery systems sensitive to different stimuli, due to the high potential attributed to the selective delivery of the payload. In this work, a stimuli-sensitive nanocarrier was built with a bifunctional acrylic polymer, linked by imine and disulfide bonds to thiolate chitosan, the latter being a biopolymer widely known in the field of tissue engineering and drug delivery by its biodegradability and biocompatibility. These polymer nanoparticles were exposed to different changes in pH and redox potential, which are environments commonly found inside cancer cells. The results proof the ability of the nanoparticles to keep the original structure when either changes in pH or redox potential were applied individually. However, when both stimuli were applied simultaneously, a disassembly of the nanoparticles was evident. These special characteristics make these nanoparticles suitable nanocarriers with potential for the selective delivery of anticancer drugs.
药物传递是制药行业中最重要的研究领域之一。每天都有不同的策略被报道,旨在动态寻求能够在体内运输药物的载体,从而避免或减少毒性问题,提高治疗效果。目前研究中最有趣的策略之一是开发对不同刺激敏感的药物传递系统,因为其在选择性传递药物载荷方面具有很大的潜力。在这项工作中,构建了一种对刺激敏感的纳米载体,该载体由双功能
丙烯酸聚合物构成,通过
亚胺键和二
硫键与
硫醇
壳聚糖相连,后者因其
生物降解性和
生物相容性在组织工程和药物传递领域广为人知。这些
聚合物纳米颗粒暴露于不同的pH值和
氧化还原电位变化中,这些环境在癌细胞内部是常见的。结果证明,当单独施加pH值或
氧化还原电位变化时,纳米颗粒能够保持原始结构。然而,当同时施加两种刺激时,纳米颗粒的解聚现象显而易见。这些特殊特性使得这些纳米颗粒成为适合的纳米载体,具有选择性传递抗癌药物的潜力。