相关实验视频
Updated: May 22, 2026

11:15
Nanosponge Tunability in Size and Crosslinking Density
Published on: August 4, 2017
从PRINT纳米颗粒中加入和控制释放乙烯前药物
Matthew C Parrott1, Mathew Finniss, J Chris Luft
1Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599, USA.
Journal of the American Chemical Society
|May 2, 2012
概括
开发了携带化疗药物的新型纳米粒子. 这些药物输送系统可以精确调节,在长时间内释放药物,从而提高治疗效率.
科学领域:
- 生物材料科学 生物材料科学
- 药物运输 药物运输 药物运输
- 纳米技术纳米技术
背景情况:
- 开发有效的药物输送系统,用于水溶性化疗药物,如gemcitabine提出了重大挑战.
- 在稳定的纳米颗粒中封装水友性药物需要创新的前药物策略.
研究的目的:
- 合成和表征非对称的双功能乙烯 (ABS) 预药物用于控制药物释放.
- 开发可调节的纳米粒子系统,用于输送gemcitabine.
- 调查前药物结构对药物释放动力学和治疗疗效的影响.
主要方法:
- 合成非对称的双功能乙烯 (ABS) 预制剂的凝.
- 将ABS前药物纳入200nm × 200nm纳米粒子.
- 在酸性条件下对纳米粒子降解的评估.
- 药物释放特征和细胞内毒性的评估,基于不同替代剂的硬质量.
主要成果:
- 成功合成了吉姆西塔的ABS原药,并将其纳入纳米粒子.
- 证明纳米粒子在酸性条件下降解,释放原始药物.
- 表明改变替代剂的固体质量精确控制了药物释放的速度.
- 建立了一个可调节的药物释放系统,能够在几个小时,几天或几个月内输送凝.
结论:
- ABS前药物为封装和输送水溶性化疗剂提供了一种可行的策略.
- 开发的纳米颗粒为控制药物释放提供了一个可调节的平台,影响细胞内毒性.
- 这种新的纳米粒子系统有望通过精确控制药物释放时间来优化化疗方案.
相关概念视频
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...
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.
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: Influencing Factors
Modified-release drug delivery systems are designed to optimize the therapeutic effect of drugs by minimizing side effects, reducing the dosage required, and controlling drug release to align with pharmacokinetic and pharmacodynamic needs. The system depends on two key factors: the drug's release from the formulation and its movement through the body to the target site. Unlike conventional dosage forms, where absorption is the limiting step, the rate of drug release is the key determinant in...
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: 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...

