Provided herein is a drug delivery (DD) system for ratiometric luminescence determination of drug release degree in drug delivery monitoring, which includes a drug, a switchable reporter and non-switchable reporter providing two distinguishable signals for detection; or a single switchable reporter providing two distinguishable signals for detection, and a cleavable linker connecting a drug to a switchable reporter, as well as a method for ratiometric luminescence determination of drug release in a target in vivo or in vitro), which is effected by administering the DD system provided herein that is capable of releasing a drug from the DD system, measuring two luminescent signals provided by the switchable reporter and the non-switchable reporter, or the single switchable reporter, determining the ratio between these two luminescence signals, and determining the drug release degree through the ratio between the two luminescence signals.
Photodynamictherapy is considered as a promising treatment for cancer, but still faces several challenges. The hypoxic environment in solid tumors, imprecise tumor recognition and the lack of selectivity between normal and cancer cells extremely hinder the applications of photodynamictherapy in clinics. Moreover, the “always on” property of photosensitizers also increases the toxicity to normal tissues
光动力疗法被认为是一种有前途的癌症治疗方法,但仍面临一些挑战。实体瘤中的缺氧环境、肿瘤识别的不精确以及正常细胞和癌细胞之间缺乏选择性极大地阻碍了光动力疗法在临床中的应用。此外,光敏剂的“永远开启”特性也会增加正常组织在光照射下的毒性。本研究合成了一种缺氧激活的近红外光敏剂ICy-N,并成功应用于体内癌症治疗。ICy-N处于失活状态,具有低荧光,而其近红外发射(λ em = 716 nm)是通过肿瘤部位硝基还原酶引起的还原而诱导的。此外,还原产物ICy-OH专门位于线粒体中,在660 nm光照射下表现出高单线态氧产量,有效诱导细胞凋亡(IC 50 = 0.63 μM)。在Balb/c小鼠中进行的体内研究表明ICy-N适用于精确的肿瘤缺氧成像,并且可以作为一种有效的光敏剂通过PDT过程抑制肿瘤生长。
A Cationic Micelle as In Vivo Catalyst for Tumor‐Localized Cleavage Chemistry
作者:Chunhong Wang、Hanyu Hong、Mengqi Chen、Zexuan Ding、Yuchen Rui、Jianyuan Qi、Zi‐Chen Li、Zhibo Liu
DOI:10.1002/anie.202106526
日期:2021.9
strategies of accelerating the cleavage reaction in tumors through locally enriching the reactants is promising. Yet, the applications are limited due to the lack of the tumor-selectivity for most of the reactants. Here we explored an alternative approach to leverage the rate constant by locally inducing an in vivo catalyst. We found that the desilylation-induced cleavagechemistry could be catalyzed in vivo
NEAR-INFRARED FLUORESCENT PROBE FOR DETECTING ALKALINE PHOSPHATASE AND MANUFACTURING METHOD THEREOF
申请人:KOREA RESEARCH INSTITUTE OF BIOSCIENCE AND BIOSCIENCE AND BIOTECHNOLOGY
公开号:US20180149596A1
公开(公告)日:2018-05-31
A near-infrared fluorescent probe for detecting ALP is represented by Chemical
1
. The fluorescent probe capable of detecting ALP can selectively detect ALP only quickly and accurately. In addition, the fluorescent probe allows monitoring of a biological phenomenon occurring in cells and tissues through noninvasive in-vivo imaging and during the early osteogenic differentiation in real time.