%0 Journal Article %A Richard Gerum %A Elham Mirzahossein %A Mar Eroles %A Jennifer Elsterer %A Astrid Mainka %A Andreas Bauer %A Selina Sonntag %A Alexander Winterl %A Johannes Bartl %A Lena Fischer %A Shada Abuhattum %A Ruchi Goswami %A Salvatore Girardo %A Jochen Guck %A Stefan Schrüfer %A Nadine Ströhlein %A Mojtaba Nosratlo %A Harald Herrmann %A Dorothea Schultheis %A Felix Rico %A Sebastian Müller %A Stephan Gekle %A Ben Fabry %T Viscoelastic properties of suspended cells measured with shear flow deformation cytometry %D 2022 %R 10.1101/2022.01.11.475843 %J bioRxiv %P 2022.01.11.475843 %X Numerous cell functions are accompanied by phenotypic changes in viscoelastic properties, and measuring them can help elucidate higher-level cellular functions in health and disease. We present a high-throughput, simple and low-cost microfluidic method for quantitatively measuring the elastic (storage) and viscous (loss) modulus of individual cells. Cells are suspended in a high-viscosity fluid and are pumped with high pressure through a 5.8 cm long and 200 µm wide microfluidic channel. The fluid shear stress induces large, near ellipsoidal cell deformations. In addition, the flow profile in the channel causes the cells to rotate in a tank-treading manner. From the cell deformation and tank treading frequency, we extract the frequency-dependent viscoelastic cell properties based on a theoretical framework developed by R. Roscoe1 that describes the deformation of a viscoelastic sphere in a viscous fluid under steady laminar flow. We confirm the accuracy of the method using atomic force microscopy-calibrated polyacrylamide beads and cells. Our measurements demonstrate that suspended cells exhibit power-law, soft glassy rheological behavior that is cell cycle-dependent and mediated by the physical interplay between the actin filament and intermediate filament networks.Competing Interest StatementThe authors have declared no competing interest. %U https://www.biorxiv.org/content/biorxiv/early/2022/01/12/2022.01.11.475843.full.pdf