Institute for Lasers, Photonics and Biophotonics, University at Buffalo, The State University of New York, Buffalo, NY, USA.
Pancreatology. 2010;10(5):553-64. doi: 10.1159/000283577. Epub 2010 Oct 23.
This work introduces a novel, facile and straightforward approach to produce cyclic-RGD-peptide-conjugated type II CdTe/CdS quantum dot (QD) formulation for pancreatic tumor targeting and imaging in live animals. The ultra-small QDs were prepared by a hot colloidal synthesis method. Phospholipid micelles were then used to encapsulate the QDs, allowing them to be stably dispersed in biological fluids and able to conjugate with cyclic-RGD peptides. The QD complex had shown low cytotoxicity on Panc-1 human pancreatic cancer cell lines. In addition, the tissue sections and biodistribution of QD complexes were imaged and analyzed in mice bearing pancreatic tumor xenografts, confirming specific tumor targeting. These studies support further evaluation of type II QDs as potential probes for early pancreatic cancer assessment and detection.
这项工作介绍了一种新颖、简便的方法,用于制备环状 RGDRGD-肽偶联的 II 型 CdTe/CdS 量子点(QD)制剂,用于活体动物中的胰腺肿瘤靶向和成像。超小 QD 通过热胶体合成方法制备。然后使用磷脂胶束包封 QD,使其能够在生物流体中稳定分散,并能够与环状 RGDRGD 肽缀合。QD 复合物对 Panc-1 人胰腺癌细胞系显示出低细胞毒性。此外,在携带胰腺肿瘤异种移植物的小鼠中对 QD 复合物的组织切片和生物分布进行了成像和分析,证实了特异性肿瘤靶向。这些研究支持进一步评估 II 型 QD 作为早期胰腺癌评估和检测的潜在探针。