Drug delivery of lipophilic pyrenyl derivatives by encapsulation in a water soluble metalla-cage
作者:Johan Mattsson、Olivier Zava、Anna K. Renfrew、Yoshihisa Sei、Kentaro Yamaguchi、Paul J. Dyson、Bruno Therrien
DOI:10.1039/c0dt00436g
日期:——
The self-assembly of 2,4,6-tris(pyridin-4-yl)-1,3,5-triazine (tpt) triangular panels with p-cymene (p-PriC6H4Me) ruthenium building blocks and 2,5-dioxydo-1,4-benzoquinonato (dobq) bridges, in the presence of a functionalised pyrenyl derivative (pyrene–R), affords the triangular prismatic host–guest compounds [(pyrene–R) ⊂ Ru6(p-PriC6H4Me)6(tpt)2(dobq)3]6+ ([(pyrene–R) ⊂ 1]6+). The inclusion of eight mono-substituted pyrenyl derivatives including biologically relevant structures (a = 1-pyrenebutyric acid, b = 1-pyrenebutanol, c = 1-pyrenemethylamine, d = 1-pyrenemethylbutanoate, e = 1-(4,6-dichloro-1,3,5-triazin-2-yl)pyrene, f = N-hexadecylpyrene-1-sulfonamide, g = pyrenyl ethacrynic amide and h = 2-(pyren-1-ylmethylcarbamoyl) phenyl acetate), and a di-substituted pyrenyl derivative (i = 1,8-bis(3-methyl-butyn-1-yl-3-ol)pyrene), has been accomplished. The carceplex nature of these systems with the pyrenyl moiety being firmly encapsulated in the hydrophobic cavity of the cage with the functional groups pointing outwards was confirmed by NMR (1H, 2D, DOSY) spectroscopy and electrospray ionization mass spectrometry (ESI-MS). The cytotoxicities of these water-soluble compounds have been established using human ovarian A2780 cancer cells. All the host–guest systems are more cytotoxic than the empty cage itself [1][CF3SO3]6 (IC50 = 23 μM), the most active carceplex [f ⊂ 1][CF3SO3]6 is an order of magnitude more cytotoxic.
在功能化的芘衍生物(pyrene–R)的存在下,2,4,6-三(吡啶-4-基)-1,3,5-三嗪(tpt)三角形面板与对伞花烃(p-PriC6H4Me)钌建筑块和2,5-二氧-1,4-苯醌酸(dobq)桥自组装,形成了三角棱柱宿主-客体化合物[(pyrene–R) ⊂ Ru6(p-PriC6H4Me)6(tpt)2(dobq)3]6+([(pyrene–R) ⊂ 1]6+)。已经成功地纳入了八种单取代的芘衍生物,其中包括生物相关的结构(a = 1-芘丁酸,b = 1-芘丁醇,c = 1-芘甲胺,d = 1-芘甲丁酸酯,e = 1-(4,6-二氯-1,3,5-三嗪-2-基)芘,f = N-十六烷基芘-1-磺酰胺,g = 芘依他尼酸胺,h = 2-(芘-1-基甲氨酰基)苯乙酸酯),以及一种双取代的芘衍生物(i = 1,8-双(3-甲基-丁炔-1-基-3-醇)芘)。通过NMR(1H,2D,DOSY)光谱和电喷雾电离质谱(ESI-MS)证实了这些系统的笼状性质,芘基团牢固地封装在笼的疏水腔内,功能基团指向外部。这些水溶性化合物的细胞毒性已经使用人卵巢A2780癌细胞进行了确定。所有的宿主-客体系统的细胞毒性都比空笼本身[1][CF3SO3]6(IC50 = 23 μM)更强,其中最活跃的笼状化合物[f ⊂ 1][CF3SO3]6的细胞毒性高出一个数量级。