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
Oligosaccharide conjugates for targeting bacteria and uses related thereto
申请人:Emory University
公开号:US09821071B2
公开(公告)日:2017-11-21
This disclosure relates to conjugates for targeting bacteria and related uses. In certain embodiments, the disclosure relates to methods of transferring a molecule of interest into bacteria comprising mixing bacteria with a non-naturally occurring conjugate under conditions such that the conjugate is transported across the bacterial cell wall. Typically, the conjugate comprises an oligosaccharide and a molecule of interest. In certain embodiments, the molecule of interest may be a tracer or an antibiotic.
On the Signalling Pathways and Cu<sup>II</sup>-Mediated Anion Indication of<i>N</i>-<i>meso</i>-Substituted Heptamethine Cyanine Dyes
作者:Ana B. Descalzo、Knut Rurack
DOI:10.1002/chem.200802087
日期:2009.3.16
Join or attack: meso‐Cyclam‐substituted heptamethinecyaninedye 1 responds very differently to the presence of metal ions and protons. Whereas the former are embraced in a host–guest complex, the latter attack the cyanine π system (see picture). In the presence of CuII, 1 selectively forms near‐infrared absorbing aggregates in buffered solution that allow the determination of citrate by using colourimetry
In Vivo Tracking of Cell Viability for Adoptive Natural Killer Cell‐Based Immunotherapy by Ratiometric NIR‐II Fluorescence Imaging
作者:Naishun Liao、Lichao Su、Youshi Zheng、Bixing Zhao、Ming Wu、Da Zhang、Huanghao Yang、Xiaolong Liu、Jibin Song
DOI:10.1002/anie.202106730
日期:2021.9.13
therapeutic efficacy of naturalkiller (NK) cells-based immunotherapy is greatly related with the survival of transplanted NK cells. However, no effective strategy was reported to monitor NK cellviability in adoptiveimmunotherapy in vivo. Herein, we develop a ratiometric NIR-II fluorescenceimaging strategy to quantitively track and visualize the adoptive NK cellviability in vivo in real-time. The nanoprobe
基于自然杀伤 (NK) 细胞的免疫疗法的治疗效果与移植的 NK 细胞的存活密切相关。然而,没有报道在体内过继免疫治疗中监测 NK 细胞活力的有效策略。在此,我们开发了一种比率 NIR-II 荧光成像策略,以实时定量跟踪和可视化体内过继性 NK 细胞的活力。纳米探针由涂有 IR786s 的基于镧系元素的下转换纳米粒子 (DCNP) 组成,IR786s 是一种对 NIR 染料敏感的活性氧 (ROS),直接用 NK 细胞标记。细胞死亡后,NK细胞内产生过量的ROS,同时IR786s降解,在808nm激发下,在DCNP的1550nm处开启NIR-II荧光信号,而在 980 nm 激发下 DCNP 在 1550 nm 处的荧光信号是稳定的。这种细胞内 ROS 诱导的比率 NIR-II 荧光信号被证实与体内 NK 细胞活力相关。使用这种纳米报告基因,我们进一步证明了与 IL-2、IL-15 和 IL-21
Microwave-assisted synthesis of near-infrared fluorescent sphingosine derivatives
作者:Kumar R. Bhushan、Fangbing Liu、Preeti Misra、John V. Frangioni
DOI:10.1039/b807930g
日期:——
Microwave-assisted synthesis of near-infrared fluorescent sphingosine derivatives is described, and the utility of the probes demonstrated by co-localization studies with visible wavelength fluorescent sphingosine derivatives.