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Theranostics. 2012;2(7):723-33. doi: 10.7150/thno.4275. Epub 2012 Aug 1.

PEGylated Phospholipid Micelle-Encapsulated Near-Infrared PbS Quantum Dots for in vitro and in vivo Bioimaging.

Author information

  • 11. School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore.

Abstract

Surface modification and functionalization of bioconjugated quantum dots (QDs) has drawn great attention for the past few years due to their wide applications in biomedical research. In this contribution, we demonstrate the use of PEGylated phospholipid micelles to encapsulate near infrared emitting ultra-small lead sulfide (PbS) QDs for in vitro and in vivo imaging. The cytotoxicity of the micelle-encapsulated QDs formulation was evaluated using MTS assay and histological analysis studies. We have found that upon encapsulating the QDs with phospholipid micelle, the toxicity of the PbS QDs is reduced, from which we envision that the PEGylated phospholipid micelle-encapsulated PbS QDs formulation can be used as theranostics probes for some selected applications in cell imaging and small animals study.

KEYWORDS:

Micelle encapsulation; PEG.; Phospholipid; bioimaging; quantum dots

PMID:
22896774
[PubMed]
PMCID:
PMC3418932
Free PMC Article

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