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Microrheology, stress fluctuations, and active behavior of living cells

Lau, A W C ; Hoffman, B D ; Davies, A ; Crocker, J C ; Lubensky, T C

Physical review letters, 2003-11, Vol.91 (19), p.198101-198101, Article 198101 [Periódico revisado por pares]

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Título:
Microrheology, stress fluctuations, and active behavior of living cells
Autor: Lau, A W C ; Hoffman, B D ; Davies, A ; Crocker, J C ; Lubensky, T C
Assuntos: Cell Physiological Phenomena ; Elasticity ; Mathematical Computing ; Rheology - methods ; Stress, Mechanical ; Viscosity
É parte de: Physical review letters, 2003-11, Vol.91 (19), p.198101-198101, Article 198101
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: We report the first measurements of the intrinsic strain fluctuations of living cells using a recently developed tracer correlation technique along with a theoretical framework for interpreting such data in heterogeneous media with nonthermal driving. The fluctuations' spatial and temporal correlations indicate that the cytoskeleton can be treated as a course-grained continuum with power-law rheology, driven by a spatially random stress tensor field. Combined with recent cell rheology results, our data imply that intracellular stress fluctuations have a nearly 1/omega2 power spectrum, as expected for a continuum with a slowly evolving internal prestress.
Editor: United States
Idioma: Inglês

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