Single-Cell Biophysics: Measurement, Modulation, and Modeling

Single-Cell Biophysics: Measurement, Modulation, and Modeling

Saturday Speaker Abstracts

Membrane Curvature at the Nano-Bio Interface

Bianxiao Cui

Stanford University, Stanford., USA.

The interaction between the cell membrane and the contacting substrate is crucial for many

biological applications such as medical implants. We are interested in exploring nanotechnology

and novel materials to improve the membrane-surface interactions. Recently, we and other

groups show that vertical nanopillars protruding from a flat surface support cell survival and can

be used as subcellular sensors to probe biological processes in live cells. Vertical nanopillars

deform the plasma membrane inwards and induce membrane curvature when the cell engulfs

them, leading to a reduction of the membrane-substrate gap distance. We found that the high

membrane curvature induced by vertical nanopillars significantly affects the distribution of

curvature-sensitive proteins and stimulates several cellular processes in live cells. Our studies

show a strong interplay between biological cells and nano-featured surfaces, which is an

essential consideration for future development of interfacing devices.

References

1. Zhao W, Hanson L, Lou HY, Akamatsu M, Chowdary P, Santoro F, Marks JR, Grassart A,

Drubin DG, Cui Y, Cui B, Nanoscale manipulation of membrane curvature for probing

endocytosis in live cells, Nature Nanotechnology, accepted (2017).

2. Hanson L, Zhao W, Lou HY, Lin ZL, Lee SW, Chowdary P, Cui Y, Cui B, Vertical

nanopillars for in situ probing of nuclear mechanics in adherent cells, Nature Nanotechnology,

10, 554-562, (2015).

2. Lin ZL, Xie C, Osakada Y, Cui Y, Cui B, Iridium Oxide Nanotube Electrodes for Intracellular

Measurement of Action Potentials, Nature Communications, 5, 3206 (2014).

3. Xie C, Lin ZL, Hanson L, Cui Y, Cui B, Intracellular recording of action potentials by

nanopillar electroporation, Nature Nanotechnology, 7, 185-190 (2012).

4. Hanson L, Lin ZL, Xie C, Cui Y, Cui B, Characterization of the Cell-Nanopillar Interface by

Transmission Electron Microscopy, Nano Letters, 12, 5815-5820 (2012).