The present invention is in the field of pharmaceuticals and chemical industries. In particular, one aspect of the present invention relates to methods for labeling, imaging and detecting the beta-amyloid (Aβ) peptides, oligomers, and fibrils in vitro and in vivo via magnetic resonance and florescence imaging by using modified carbazole-based fluorophores. A further aspect of the present invention relates to a method of reducing and preventing aggregation of beta-amyloid peptides for Alzheimer's disease (AD) as well as of treating and/or preventing Alzheimer's disease by using the modified carbazole-based fluorophore. The modified carbazole-based fluorophore according to an embodiment of the present invention is prepared by conjugating a carbazole-based fluorophore with magnetic nanoparticles to form a conjugate which is permeable to blood brain barrier of a subject being introduced therewith.
Antimicrobial activity of 4-(N-dimethylaminostyrl)quinolinium salts
作者:B. M. Gutsulyak、S. T. Dzyubak、R. S. Petrovskii、E. S. Kyrina、S. I. Mykytyn
DOI:10.1007/bf00769653
日期:1988.5
The physiological activity of 2-(n-dimethylaminostyryl)quinolinium salts have long since been recognized and rather thoroughly studied [i, 2]. The isomers containing a dimethylaminostyryl group in position 4 of the quinoline ring have been studied to a comparatively lesser degree. The present study presents the results of an examination of the effect that a series of new N-aryland N-alkyl-substituted
Study on Synthesis and Spectrum of Novel Styryl Cyanine Dyes with a Carbazole Bridged Chain
作者:Xuening Fei、Yingchun Gu、Chao Li、Xu Yang
DOI:10.1007/s10895-011-1014-0
日期:2012.5
Based on the frequently-used cyanine dye probe thiazole orange (TO), a novel kind of cyanine dye was designed and synthesized. Carbazole was inserted into the methylidyne structure of TO as a bridge to afford a kind of novel styryl cyanine dye with carbazole bridged chain. The dyes were characterized by HNMR and MS. The spectra of the novel dyes were also studied and the results showed that the fluorescent wavelength of novel carbzole dye shifted red for 100 nm, stock shift increased by 70 nm and the fluorescent intensity enhanced by 70 times compared to that of TO. When the novel dye was labeled by BSA, its fluorescent wavelength changed little and the intensity enhanced. It is indicated that it can be used as an excellent fluorescent probe in biological labeling.
在常用的氰基染料探针噻唑橙(TO)的基础上,设计并合成了一种新型氰基染料。将咔唑作为桥插入 TO 的甲基idyne 结构中,得到了一种新型的咔唑桥链苯乙烯基氰基染料。这些染料通过 HNMR 和 MS 进行了表征。对新型染料的光谱也进行了研究,结果表明,新型咔唑染料的荧光波长红移了 100 nm,与 TO 相比,股移增加了 70 nm,荧光强度增强了 70 倍。当新型染料被 BSA 标记后,其荧光波长变化不大,荧光强度增强。这表明它可以作为一种优良的荧光探针用于生物标记。