Subcellular-resolution Delivery of a Cytokine Through Precisely Manipulated Nanowires

Overview

Journal Nat Nanotechnol

Specialty Biotechnology

Date 2010 Jun 15

PMID 20543835

Citations 40

Authors

Donglei Fan

Zhizhong Yin

Raymond Cheong

Frank Q Zhu

Robert C Cammarata

C L Chien

Andre Levchenko

Affiliations

Soon will be listed here.

Abstract

Precise delivery of molecular doses of biologically active chemicals to a pre-specified single cell among many, or a specific subcellular location, is still a largely unmet challenge hampering our understanding of cell biology. Overcoming this could allow unprecedented levels of cell manipulation and targeted intervention. Here, we show that gold nanowires conjugated with a cytokine such as tumour-necrosis factor-alpha can be transported along any prescribed trajectory or orientation using electrophoretic and dielectrophoretic forces to a specific location with subcellular resolution. The nanowire, 6 microm long and 300 nm in diameter, delivered the cytokine and activated canonical nuclear factor-kappaB signalling in a single cell. Combined computational modelling and experimentation indicated that cell stimulation was highly localized to the nanowire vicinity. This targeted delivery method has profound implications for controlling signalling events on the single cell level.

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