Nanoscale tweezers for single-cell biopsies
Authors listBinoy Paulose Nadappuram Paolo Cadinu Avijit Barik Alexander J Ainscough Mike Devine Minkyung Kang Jorge Gonzalez-Garcia Josef T Kittler Keith R Willison Ramon Vilar Paolo Actis Beata Wojciak-Stothard Sang-Hyun Oh Aleksandar P Ivanov Joshua B Edel
Much of the functionality of multicellular systems arises from the spatial organization and dynamic behaviours within and between cells. Current single-cell genomic methods only provide a transcriptional 'snapshot' of individual cells. The real-time analysis and perturbation of living cells would generate a step change in single-cell analysis. Here we describe minimally invasive nanotweezers that can be spatially controlled to extract samples from living cells with single-molecule precision. They consist of two closely spaced electrodes with gaps as small as 10-20 nm, which can be used for the dielectrophoretic trapping of DNA and proteins. Aside from trapping single molecules, we also extract nucleic acids for gene expression analysis from living cells without affecting their viability. Finally, we report on the trapping and extraction of a single mitochondrion. This work bridges the gap between single-molecule/organelle manipulation and cell biology and can ultimately enable a better understanding of living cells.