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Small. 2007 Sep;3(9):1560-5.

Specific integrin labeling in living cells using functionalized nanocrystals.

Author information

1
Lehrstuhl für Biophysik E22, Technische Universität München, Garching, Germany.

Abstract

We present an integrin labeling method using functionalized quantum dots (QDs). Cyclic Arg-Gly-Asp (RGD) peptides and a biotin-streptavidin linkage are used to specifically couple individual QDs to integrins of living cells. The spacer distance between the RGD sequence and the QD surface is a crucial parameter to ensure specific binding to individual alpha(v)beta(3) integrins of osteoblast cells. Despite blinking, the position of single QDs is tracked with nanometer precision and localized diffusive behavior is observed. We show that blinking events do not prevent the acquisition of quantitative parameters from the QD trajectories.

PMID:
17705315
DOI:
10.1002/smll.200700148
[Indexed for MEDLINE]
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