7-Amino coumarin based fluorescent phototriggers coupled with nano/bio-conjugated bonds: Synthesis, labeling and photorelease
作者:Qiuning Lin、Chunyan Bao、Guanshui Fan、Shuiyu Cheng、Hui Liu、Zhenzhen Liu、Linyong Zhu
DOI:10.1039/c2jm30357d
日期:——
By several synthetic pathways, we designed and synthesized a new series of unsymmetrical substituted 7-amino coumarin-based phototriggers with various nano/bio-conjugated bonds. The photophysical properties of most of the substituted coumarin-based phototriggers, except for compound P9 with maleimide group, showed no significant change compared with that of 7-(diethylamino)-4-(hydroxylmethyl) coumarin (DEACM-OH, the reported symmetric substituted 7-amine coumarin based phototrigger). Four compounds (P2, P4, P9, 14) were successfully conjugated with typical carriers such as mesoporous silica nanoparticles, biocompatible polymer PEG and common protein BSA, respectively. The efficient photorelease of ibuprofen (IBU) in the model cargo delivery system of MD4 confirmed that our designed phototriggers could serve well as a photo-cage for bioactive molecules and the release can be regulated precisely by manipulating the external irradiation conditions. All the results hinted at the superiority of using these coumarin functional compounds for photo-regulated release in biotechnology and biomedical areas.
通过几种合成路径,我们设计并合成了一系列新的不对称取代的7-氨基香豆素基光触发剂,具有不同的纳米/生物共轭键。除含有马来酰亚胺基团的化合物P9外,大多数取代香豆素基光触发剂的光物理性质与已报道的对称取代的7-氨基香豆素(7-(二乙基氨基)-4-(羟甲基)香豆素,DEACM-OH)相比没有显著变化。四种化合物(P2、P4、P9、14)成功地与典型载体如中孔硅纳米颗粒、生物相容性聚合物PEG和常见蛋白质BSA进行了共轭。在MD4的模型货物输送系统中,布洛芬(IBU)的高效光释放证实了我们设计的光触发剂可以很好地作为生物活性分子的光笼,并且其释放可以通过操控外部照射条件进行精确调节。所有结果暗示使用这些香豆素功能化合物进行光调控释放在生物技术和生物医学领域的优越性。