Acoustic tweezing cytometry for live-cell subcellular modulation of intracellular cytoskeleton contractility.

Abstract:

:Mechanical forces are critical to modulate cell spreading, contractility, gene expression, and even stem cell differentiation. Yet, existing tools that can apply controllable subcellular forces to a large number of single cells simultaneously are still limited. Here we report a novel ultrasound tweezing cytometry utilizing ultrasound pulses to actuate functionalized lipid microbubbles covalently attached to single live cells to exert mechanical forces in the pN - nN range. Ultrasonic excitation of microbubbles could elicit a rapid and sustained reactive intracellular cytoskeleton contractile force increase in different adherent mechanosensitive cells. Further, ultrasound-mediated intracellular cytoskeleton contractility enhancement was dose-dependent and required an intact actin cytoskeleton as well as RhoA/ROCK signaling. Our results demonstrated the great potential of ultrasound tweezing cytometry technique using functionalized microbubbles as an actuatable, biocompatible, and multifunctional agent for biomechanical stimulations of cells.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Fan Z,Sun Y,Di Chen,Tay D,Chen W,Deng CX,Fu J

doi

10.1038/srep02176

subject

Has Abstract

pub_date

2013-01-01 00:00:00

pages

2176

issn

2045-2322

pii

srep02176

journal_volume

3

pub_type

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