Real-Time Intravital Imaging of RGD−Quantum Dot Binding to Luminal Endothelium in Mouse Tumor Neovasculature

Nanoscale materials have increasingly become subject to intense investigation for use in cancer diagnosis and therapy. However, there is a fundamental dearth in cellular-level understanding of how nanoparticles interact within the tumor environment in living subjects. Adopting quantum dots (qdots) f...

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Vydané v:	Nano letters Ročník 8; číslo 9; s. 2599 - 2606
Hlavní autori:	Smith, Bryan Ronain, Cheng, Zhen, De, Abhijit, Koh, Ai Leen, Sinclair, Robert, Gambhir, Sanjiv Sam
Médium:	Journal Article
Jazyk:	English
Vydavateľské údaje:	Washington, DC American Chemical Society 01.09.2008
Predmet:	Animals Applied sciences Biological and medical sciences Biotechnology Cross-disciplinary physics: materials science; rheology Electronics Endothelium, Vascular - metabolism Exact sciences and technology Fundamental and applied biological sciences. Psychology Materials science Methods. Procedures. Technologies Mice Microscopy, Electron, Transmission Molecular electronics, nanoelectronics Nanocrystalline materials Nanoscale materials and structures: fabrication and characterization Neoplasms, Experimental - blood supply Oligopeptides - metabolism Others Physics Protein Binding Quantum Dots Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices Spectrometry, Fluorescence Various methods and equipments Peptides Brightness Quantum dots Amino acids Nanostructures Glycine Real time Nanoparticles Nanometer scale Arginine Fluorescent material Tumours Nanostructured materials
ISSN:	1530-6984, 1530-6992
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Shrnutí:	Nanoscale materials have increasingly become subject to intense investigation for use in cancer diagnosis and therapy. However, there is a fundamental dearth in cellular-level understanding of how nanoparticles interact within the tumor environment in living subjects. Adopting quantum dots (qdots) for their excellent brightness, photostability, monodispersity, and fluorescent yield, we link arginine−glycine−aspartic acid (RGD) peptides to target qdots specifically to newly formed/forming blood vessels expressing αvβ3 integrins. Using this model nanoparticle system, we exploit intravital microscopy with subcellular (∼0.5 µm) resolution to directly observe and record, for the first time, the binding of nanoparticle conjugates to tumor blood vessels in living subjects. This generalizable method enabled us to show that in this model qdots do not extravasate and, unexpectedly, that they only bind as aggregates rather than individually. This level of understanding is critical on the path toward ensuring regulatory approval of nanoparticles in humans for disease diagnostics and therapeutics. Equally vital, the work provides a platform by which to design and optimize molecularly targeted nanoparticles including quantum dots for applications in living subjects.
Bibliografia:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	1530-6984 1530-6992
DOI:	10.1021/nl080141f