DNA Photocleavage in the Near-Infrared Wavelength Range by 2-Quinolinium Dicarbocyanine Dyes
作者:Effibe O. Ahoulou、Kaitlyn K. Drinkard、Kanchan Basnet、Anna St. Lorenz、Oleh Taratula、Maged Henary、Kathryn B. Grant
DOI:10.3390/molecules25122926
日期:——
Here, we report the syntheses of two pentamethine cyanine dyes containing quinolinium rings and substituted with either hydrogen (3) or bromine (4) at the meso carbon. The electron withdrawing bromine atom stabilizes dye 4 in aqueous buffer, allowing complex formation to occur between the dye and double-helical DNA. UV–visible, CD, and fluorescence spectra recorded at low DNA concentrations suggest
在这里,我们报告了两种含有喹啉环并在中间碳上被氢 (3) 或溴 (4) 取代的五甲川花青染料的合成。吸电子溴原子在水性缓冲液中稳定染料 4,使染料和双螺旋 DNA 之间形成复合物。在低 DNA 浓度下记录的 UV-可见光、CD 和荧光光谱表明,染料 4 最初作为高阶聚集体与 DNA 结合。随着 DNA 与染料的比例增加,聚集体转化为单体和其他低阶染料形式,以非嵌入方式与 DNA 相互作用。溴化染料 4 在黑暗中相对不反应,但在 707-759 nm 光照下,会产生羟基自由基,以高产率(pH 7.0,22 °C)切割 DNA。染料 4 也被 ES2 卵巢癌细胞吸收,在黑暗条件下它是无毒的。在 694 nm 照射 ES2 细胞后,溴化花青将细胞活力从 100 ± 10% 降低到 14 ± 1%。我们的结果表明,配备有稳定吸电子基团的 2-喹啉基碳菁染料可能有可能在长波长光治疗应用中用作敏化剂。
Molecular Design Strategies for Near-Infrared Ratiometric Fluorescent Probes Based on the Unique Spectral Properties of Aminocyanines
In spite of the wide availability of various near‐infrared (NIR) fluorophores as labeling reagents, there are few functional NIR fluorescentprobes for which change in the absorption and/or fluorescence spectra upon specific reaction with biomolecules is seen. The widely used photoinduced electron‐transfer mechanism is unsuitable for NIR fluorophores, such as tricarbocyanines, because their long excitation
Comparative Study of Novel Fluorescent Cyanine Nucleotides: Hybridization Analysis of Labeled PCR Products Using a Biochip
作者:V. E. Shershov、S. A. Lapa、V. E. Kuznetsova、M. A. Spitsyn、T. O. Guseinov、S. A. Polyakov、A. A. Stomahin、A. S. Zasedatelev、A. V. Chudinov
DOI:10.1007/s10895-017-2139-6
日期:2017.11
efficiency of nucleotideincorporation during PCR was assessed with a multi-parameter hybridization analysis using a diagnostic DNA microarray. The hybridization analysis indirectly estimates the incorporation efficiency of dye-labeled nucleotides in multiplex PCR. Our results demonstrated higher efficiencies of substrates with electrically neutral dyes than electropositive and electronegative Cy5 residues
Shine on: A new rationaldesign strategy for near‐infrared‐emitting fireflyluciferins that are available in vivo has been developed using intramolecular bioluminescence resonance energy transfer (BRET). The emission wavelength could be freely tuned by the choice of BRET acceptor, and NIR bioluminescence could be detected in living cells and mice without the need for luciferase manipulation.
Glucose-sensing luminescent dyes, polymers, and sensors are provided. Additionally, systems including the sensors and methods of using these sensors and systems are provided.