工程 pH-响应性 Dendrimer-STAT3 抑制剂结合物用于细胞内输送
Chenikkayala Siva Sankara1, Akanksha Ramadas Shanbhag1, Daniel Rincón Díaz1
1Department of Pharmaceutics, College of Pharmacy, University of Florida, Gainesville 32610, United States.
Biomacromolecules
|November 27, 2025
概括
我们开发了用于抑制STAT3的新型树突分子药物联合体,改善溶解度和降低毒性. 在临床前的模型中,与水结合的合物显示出强大的抗癌活性和免疫调节.
科学领域:
- 生物结合化学 生物结合化学
- 纳米医学是一种纳米医学.
- 免疫学 免疫学 免疫学
背景情况:
- 小分子STAT3抑制剂面临临临床翻译挑战,如溶解性差和高毒性.
- 开发有效的药物输送系统对于提高治疗结果至关重要.
研究的目的:
- 为了制造具有pH反应的STAT3抑制剂LLL12的多胺胺) 树突结合物.
- 为了提高LLL12溶解度,降低细胞毒性,并实现受控的细胞内药物释放.
主要方法:
- 通过pH敏感的硫基酸盐,硫基酸盐和酸连接剂,将LLL12与G6 PAMAM树突体结合.
- 药物的溶解性,细胞毒性,稳定性,pH依赖释放和*体外*功效的评估.
- 评估结合剂在抑制骨髓系衍生抑制细胞和促进抗原呈现细胞成熟方面的疗效.
主要成果:
- 结合显著增加了LLL12溶解度到10 mg/mL,并降低了细胞毒性.
- 所有的结合物都显示了pH依赖的药物释放,与水结合的G6-LLL12表现出与自由LLL12相比的强度.
- 基于水的G6-LLL12有效地减少了免疫抑制性髓状细胞,并增强了抗原呈现细胞的成熟.
结论:
- 响应pH的树突联体为克服小分子STAT3抑制剂的局限性提供了一个有希望的策略.
- 与水连接的G6-LLL12合体显示出增强的安全性和潜在的免疫调节性癌症治疗的保留功效.
相关概念视频
01:30Modified-Release Drug Delivery Systems: Stimuli-Activated
Stimuli-activated drug delivery systems are designed to release drugs in response to specific physical, chemical, or biological stimuli. These systems often utilize hydrogels—three-dimensional, hydrophilic polymer networks capable of swelling in aqueous environments and retaining significant fluid volumes. Upon exposure to particular stimuli, these hydrogels undergo structural transitions that allow the embedded drug to be released. Due to this adaptive behavior, such systems are also called...
01:24Modified-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.
01:24Site-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...