双pH和Ca2+-响应性PEG-修改支柱[5]arene-based超分子纳米药物输送系统:优秀的货物封装和最小的药物毒性
Haojie Shao1, Wengui Duan1, Yan Huang2
1Guangxi Colleges and Universities Key Laboratory of Applied Chemistry Technology and Resource Development, School of Chemistry and Chemical Engineering, Guangxi University, 530004, Nanning, China.
Chemistry (Weinheim an der Bergstrasse, Germany)
|June 14, 2024
概括
这项研究引入了一种新的pH和Ca2+响应纳米药物输送系统 (NDDS) 用于化疗. 开发的系统增强了抗瘤活性,同时减少了不良影响,显示了改善癌症治疗的巨大潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 生物医学工程 生物医学工程
背景情况:
- 化疗面临的挑战包括副作用和低于最佳的生物活性.
- 开发先进的药物输送系统对于提高癌症治疗疗效至关重要.
研究的目的:
- 创建一个pH和Ca2+响应的支柱[5]以为基础的超分子纳米药物递送系统 (NDDS).
- 通过降低毒性和提高疗效,提高化疗药物的治疗指数.
主要方法:
- 制造一种超分子纳米药物载体 (WP5EV),使用PEG修饰柱[5]arene和双盐衍生物EV.之间的宿主-客人相互作用.
- 将抗瘤药物多克索鲁比 (DOX) 装入纳米载体,达到84.6%的封装率.
- 在体外对正常 (293T) 和癌细胞 (HepG2) 的细胞毒性测定,以及在小鼠体内的药理动力学研究.
主要成果:
- NDDS (WP5EV@DOX) 显示对正常细胞的毒性降低,对癌细胞的抗瘤活性显著增强.
- 在体内研究显示,与自由DOX相比,WP5EV@DOX的半衰期增加了212%,生物可用性增加了179%.
- 纳米药物输送系统表现出由pH和Ca2+触发的受控释放特性.
结论:
- 开发的支柱[5]基超分子NDDS (WP5EV@DOX) 有效地改善了化疗结果.
- 该系统为向癌症治疗提供了一个有希望的策略,并减少了副作用.
- 这项研究提出了一种新的宿主-客人药物递送方法,在瘤治疗中具有显著的潜力.
相关概念视频
Modified-Release Drug Delivery Systems: Rate-Programmed II
Rate-programmed drug delivery systems release drugs in a controlled manner to maintain therapeutic levels. Three main designs include reservoir, matrix, and hybrid systems.Reservoir systems consist of a drug core enclosed within a membrane that controls drug release. In non-swelling reservoir systems, polymers like ethyl cellulose or polymethacrylates are used. These do not hydrate in aqueous media and control release through membrane thickness, porosity, or insolubility. This type includes...
Modified-Release Drug Delivery Systems: Overview
Modified-release dosage forms are designed to address the limitations of drugs with short biological half-lives. These forms maintain stable therapeutic drug concentrations over extended periods, reducing the need for frequent dosing. A consistent drug level helps minimize peak-trough fluctuations, which can reduce adverse effects, lower the risk of drug resistance, and improve overall treatment effectiveness.One common type of modified-release form is the extended-release (ER) formulation. ER...
Modified-Release Drug Delivery Systems: Classification
Modified-release drug delivery systems improve drug efficacy and minimize side effects by controlling the rate and location of drug release. These systems fall into three categories: rate-programmed, stimuli-activated, and site-targeted.Rate-programmed systems release drugs at a predetermined rate, maintaining consistent therapeutic levels and reducing fluctuations that could lead to toxicity or subtherapeutic effects. These systems use polymeric matrices, reservoir-based designs, or osmotic...
Modified-Release Drug Delivery Systems: Rate-Programmed I
Rate-programmed drug delivery systems (DDS) are designed to release drugs at specific, controlled rates to maintain consistent therapeutic levels. These systems are categorized based on their release mechanisms, including dissolution-controlled DDS, diffusion-controlled DDS, and combined dissolution-diffusion-controlled DDS.In dissolution-controlled DDS, the release rate depends on the slow dissolution of the drug itself or the surrounding matrix. Drugs with inherently slow dissolution rates,...
Modified-Release Drug Delivery Systems: Site-Targeted
Site-targeted drug delivery systems enhance therapeutic efficacy while minimizing systemic toxicity and treatment costs. Unlike conventional methods, these systems ensure precise drug delivery, improving bioavailability and reducing side effects. Targeted drug delivery is classified into three levels. First-order targeting directs drugs to the capillary beds of specific organs or tissues. Second-order targets specific cell types, such as tumor cells, using receptor-mediated interactions.
Site-Targeted Drug Delivery Systems: Polymeric Carriers
Polymeric carriers enhance targeted drug delivery by increasing efficacy while minimizing off-target effects. These carriers comprise a biodegradable polymeric backbone integrated with functional elements that enable targeting, improve physicochemical properties, and regulate drug release.Targeting MechanismsThe targeting ability of polymeric carriers is mediated by a homing device, which is a molecular recognition component designed to selectively bind to specific tissues or cells. Monoclonal...


