Conjugates of Modified Cryptophycins and RGD-Peptides Enter Target Cells by Endocytosis
摘要:
Tumor targeting anticancer drug conjugates that contain a tumor recognition motif (homing device) are of high current relevance. Cryptophycins, naturally occurring cytotoxic cyclo-depsipeptides, have been modified by total synthesis to provide analogues suitable for conjugation to peptide-based homing devices. An array of functionalized beta(2)-amino acids was synthesized and incorporated into cryptophycins. All analogues proved to be highly active in the cytotoxicity assay using the human cervix carcinoma cell line KB-3-1 and its multidrug-resistant subclone KB-V1. Conformational analysis of cryptophycin-52 and two synthetic analogues was performed by NMR and MD methods to obtain information on the influence of the unit C configuration on the overall conformation. An azide-functionalized cryptophycin was connected by CuAAC to an alkyne-containing fluorescently labeled cyclic RGD-peptide as the homing device for internalization studies. Confocal fluorescence microscopy proved integrin-mediated internalization by endocytosis and final lysosomal localization of the cryptophycin prodrug.
Specific Detection of Integrin α<sub>v</sub>β<sub>3</sub> by Light-Up Bioprobe with Aggregation-Induced Emission Characteristics
作者:Haibin Shi、Jianzhao Liu、Junlong Geng、Ben Zhong Tang、Bin Liu
DOI:10.1021/ja302369e
日期:2012.6.13
Specificbioprobes with fluorescenceturn-on response are highly desirable for high contrast biosensing and imaging. In this work, we developed a new generation bioprobe by integrating tetraphenylsilole, a fluorogenic unit with aggregation-induced emission (AIE) characteristic, with cyclic arginine-glycine-aspartic acid tripeptide (cRGD), a targeting ligand to integrin α(v)β(3) receptor. Emission of
Biocompatible Nanoparticles with Aggregation Induced Emission Characteristics as Fluorescent Bioprobes and Methods of Using the Same for In Vitro and In Vivo Imaging
申请人:Tang Benzhong
公开号:US20140328764A1
公开(公告)日:2014-11-06
The development of fluorescent bioprobes comprising organic fluorescent compounds that exhibit aggregation induced emission (AIE) properties, methods of producing the same, and their practical applications for in vitro and in vivo bioimaging.
Dual-targeted activatable photosensitizers with aggregation-induced emission (AIE) characteristics for image-guided photodynamic cancer cell ablation
作者:Youyong Yuan、Shidang Xu、Chong-Jing Zhang、Ruoyu Zhang、Bin Liu
DOI:10.1039/c5tb02270c
日期:——
The currently available photosensitizers (PSs) for photodynamic therapy (PDT) can easily lead to undesirable normal cell death due to their intrinsic photo-toxicity and lack of selectivity for cancercells. Activatable PSs with high therapeutic efficiency towards cancercells but minimized side effects on normal cells are thus highly desirable. In this work, we developed a probe with dual-targeted
Labeling and Glycosylation of Peptides Using Click Chemistry: A General Approach to 18F-Glycopeptides as Effective Imaging Probes for Positron Emission Tomography
Click for PET: An efficient strategy based on clickchemistry has been developed for 18F‐labeling alkyne‐bearing peptides with concomitant glycosylation. The mild conditions and general applicability of this reliable reaction gives access to a new class of 18F‐glycopeptide radiopharmaceuticals with improved biological properties for in vivo imaging studies by positronemissiontomography (PET).
Click for PET:已开发出一种基于点击化学的有效策略,可用于同时伴随糖基化的18 F标记炔烃肽。这种可靠反应的温和条件和一般适用性使人们可以使用一种具有改善的生物学特性的新型18 F-糖肽放射性药物,以进行正电子发射断层扫描(PET)的体内成像研究。
Targeted theranostic prodrugs based on an aggregation-induced emission (AIE) luminogen for real-time dual-drug tracking
作者:Youyong Yuan、Ryan T. K. Kwok、Ruoyu Zhang、Ben Zhong Tang、Bin Liu
DOI:10.1039/c4cc05255b
日期:——
A targeted theranostic delivery system containing two prodrugs with drug tracking and activation monitoring functions was developed for visualizing cancer cell ablation with synergistic anticancer effects.