Multi-resolution 3D visualization of the early stages of cellular uptake of peptide-coated nanoparticles.

Journal Article

A detailed understanding of the cellular uptake process is essential to the development of cellular delivery strategies and to the study of viral trafficking. However, visualization of the entire process, encompassing the fast dynamics (local to the freely diffusing nanoparticle) as well the state of the larger-scale cellular environment, remains challenging. Here, we introduce a three-dimensional multi-resolution method to capture, in real time, the transient events leading to cellular binding and uptake of peptide (HIV1-Tat)-modified nanoparticles. Applying this new method to observe the landing of nanoparticles on the cellular contour in three dimensions revealed long-range deceleration of the delivery particle, possibly due to interactions with cellular receptors. Furthermore, by using the nanoparticle as a nanoscale 'dynamics pen', we discovered an unexpected correlation between small membrane terrain structures and local nanoparticle dynamics. This approach could help to reveal the hidden mechanistic steps in a variety of multiscale processes.

Full Text

Duke Authors

Cited Authors

  • Welsher, K; Yang, H

Published Date

  • March 2014

Published In

Volume / Issue

  • 9 / 3

Start / End Page

  • 198 - 203

PubMed ID

  • 24561356

Electronic International Standard Serial Number (EISSN)

  • 1748-3395

International Standard Serial Number (ISSN)

  • 1748-3387

Digital Object Identifier (DOI)

  • 10.1038/nnano.2014.12

Language

  • eng