奥利戈 (乳酸) n-帕克利塔塞尔前药物为聚 (乙烯基醇) 块-聚 (乳酸) 菌体:负载,释放和反转换为抗癌活性
Yu Tong Tam1, Jieming Gao1, Glen S Kwon1
1Pharmaceutical Sciences Division, School of Pharmacy, University of Wisconsin-Madison , 777 Highland Avenue, Madison, Wisconsin 53705-2222, United States.
Journal of the American Chemical Society
|July 5, 2016
概括
使用聚乙烯甘氨酸- 阻断聚乙烯甘氨酸 (PEG- b- PLA) 菌粒来增强包素 (PTX) 的产药. 这种新的方法改善了瘤的暴露,并降低了毒性,
科学领域:
- 生物医学工程
- 纳米技术
- 提供药物
背景情况:
- 聚乙烯糖醇- 块- 聚乙烯- 乳酸 (PEG- b- PLA) 基是帕克利塔克塞尔 (PTX) 的有效纳米载体,改善了其溶解性并使剂量升级成为可能.
- 然而,从PEG-b-PLA细胞中快速释放的PTX导致瘤积累不良和广泛的生物分布.
研究的目的:
- 通过将脂乳酸 (脂乳酸) 结合到PTX来开发新型PTX前体药物,o(LA) 8-PTX和o(LA) 16-PTX.
- 评估这些在PEG-b-PLA细胞中的o-LA-n-PTX前药物的相容性,释放动力学和体内疗效,以改善癌症治疗.
主要方法:
- 合成o(LA) 8-PTX和o(LA) 16-PTX前药物.
- 将o(LA) n-PTX装入PEG-b-PLA体,并评估药物装载能力.
- 使用A549肺癌细胞进行体外药物释放和细胞毒性测定.
- 在A549携带瘤的小鼠体内研究以评估瘤回归,生物分布和毒性.
主要成果:
- 在PEG-b-PLA小粒中,O(LA) n-PTX显著增加了药物负荷,从11%增加到54%.
- 与自由PTX相比,O(LA) n-PTX的释放概况较为缓慢,分别为o(LA) 8-PTX和o(LA) 16-PTX的半衰期为14小时和26小时.
- 与自由PTX相比,O(LA) 8-PTX载体体体内表现出显著的瘤回归,系统毒性降低.
结论:
- 作为PTX的有效促进剂,可通过非酶的反机制控制释放.
- 在PEG-b-PLA囊中封装的O ((LA) n-PTX前药物是增强PTX向瘤传递的有希望的策略.
- 改善的疗效和降低的毒性概况要求对癌症治疗进行进一步的临床研究.
相关概念视频
Drugs that Stabilize Microtubules
2.9K
Microtubules are dynamic structures that undergo cycles of catastrophe and rescue. The microtubules play a central role in cell division by forming the spindle apparatus for segregating the chromosomes. This makes them ideal targets for regulating dividing cells in tumors and malignant cancer cells. Microtubule stabilizing drugs help stabilize the microtubule formation and promote its polymerization. Paclitaxel was the first microtubule stabilizing agent used as anticancer drug in chemotherapy...
2.9K
Site-Targeted Drug Delivery Systems: Polymeric Carriers
82
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...
82


