结合聚合物/氨酸复合物用于高效的能量转移和改善光激活抗菌活性
Chengfen Xing1, Qingling Xu, Hongwei Tang
1Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, People's Republic of China.
Journal of the American Chemical Society
|August 26, 2009
概括
新的光激活材料对抗抗生素耐药性. 一个聚乙烯 - 氨酸复合物产生单点氧来杀死细菌,显示出光动力学无活化疗法的前景.
科学领域:
- 材料科学 材料科学 材料科学
- 摄影化学的使用.
- 抗菌研究 抗菌研究
背景情况:
- 抗生素耐药性的增加需要新的抗菌策略.
- 光动力学无活化为传统抗生素提供了一个有希望的替代品.
- 结合聚合物和氨酸被探索它们的抗菌潜力.
研究的目的:
- 合成和表征一种新的阳离子多烯 (PTP) 和阴离子烯 (TPPN) 复合物.
- 在白光照射下研究PTP/TPPN复合体内的能量转移机制和单点氧气生成.
- 评估PTP/TPPN复合体在光动力学无活化细菌中的有效性.
主要方法:
- 合成和PTP和TPPN的特征.
- 通过静电相互作用形成PTP/TPPN复合体.
- 在白光下照射复合物 (400-800nm).
- 评估能量传输,系统间交叉和单点氧气生成.
- 对大肠杆菌 (Escherichia coli) 和细菌 (Bacillus subtilis) 的细菌活力减少的评估.
主要成果:
- 在光照射时,PTP/TPPN复合体表现出有效的能量从PTP转移到TPPN.
- 该综合体通过TPPN的三重状态敏感化产生增强的单片氧.
- 负电荷的复合物有效地吸附到负电荷的细菌膜.
- 显著的细菌失活 (大约. 70%的生存能力降低) 在辐射后5分钟内实现.
结论:
- PTP/TPPN复合体证明了细菌的高效光动力失活.
- 光采集合聚合物中增强的能量转移有助于提高抗微生物药物的有效性.
- 这种方法为开发新的抗菌材料以打击耐药性提供了一个有前途的战略.
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