用于双重向癌症成像和治疗的细胞特异性,可激活和治疗前药物
Santimukul Santra1, Charalambos Kaittanis, Oscar J Santiesteban
1NanoScience Technology Center, University of Central Florida, 12424 Research Parkway, Suite 400, Orlando, Florida 32816, USA.
Journal of the American Chemical Society
|September 14, 2011
概括
研究人员开发了一种新型的叶酸-多克索鲁比结合物,它在进入细胞之前是不活性的. 在细胞内部,谷氨激活结合物,增强光和杀死癌细胞. 这种有针对性的前药物方法改善了药物输送和疗效.
科学领域:
- 药用化学 医学化学
- 生物结合化学 生物结合化学
- 癌症治疗方法 癌症治疗方法
背景情况:
- 叶酸受体在各种癌细胞上过度表达,这使得它们成为药物输送的有吸引力的目标.
- 多克索鲁比是一种强效的化疗药物,但其疗效受到系统性毒性和耐药性的限制.
- 亲药物策略可以改善药物向性,减少非向性影响.
研究的目的:
- 设计和合成一种具有可激活光和细胞毒性的新型叶酸-多克索鲁比结合物.
- 调查结合物的激活和细胞吸收机制.
- 评估可激活合物在癌症治疗中的治疗潜力.
主要方法:
- 使用二硫化物链接剂合成叶酸-多克索鲁比辛结合物.
- 在实验室中对结合性质的表征,包括光和细胞毒性.
- 使用表达叶酸受体的癌细胞系进行细胞吸收和激活研究.
- 在体外评估结合剂在体外的疗效.
主要成果:
- 叶酸-多克索鲁结合物在完好无损的情况下表现出灭的光和细胞毒性.
- 在癌细胞内通过谷氨介导的二硫化键裂变观察到结合酸激活.
- 活性结合物显示光增强和强大的细胞毒性,核转位观察到.
- 与自由多克索鲁比相比,有针对性的输送和激活导致癌细胞杀死显著改善.
结论:
- 成功合成了一种具有可激活光和细胞毒性的新型叶酸-多克索鲁比原药结合物.
- 双硫化连接剂使得细胞内谷氨能够在癌细胞内进行有针对性的激活.
- 这种可激活的前药物策略为向癌症治疗提供了一种有希望的方法,其疗效提高,副作用减少.
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