期刊
NATURE NANOTECHNOLOGY
卷 5, 期 7, 页码 545-551出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/NNANO.2010.104
关键词
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资金
- National Science Foundation [DMR 0403849, DMR 0706178]
- National Institutes of Health [GM072024, RR020839]
- University of Texas at Austin
- Johns Hopkins University
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 mu m 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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