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- W2113334711 abstract "Kidney glomeruli function as filters, allowing the passage of small solutes and waste products into the urinary tract, while retaining essential proteins and macromolecules in the blood stream. These structures are under constant mechanical stress due to fluid pressure, driving filtration across the barrier. We mechanically stimulated adherent wildtype podocytes using the methods of magnetic tweezer and twisting as well as cell stretching. Attaching collagen IV-coated or poly-l-lysine-coated magnetic beads to cell receptors allowed for the determination of cellular stiffness. Angiotensin II-treated podocytes showed slightly higher stiffness than untreated cells, the cell fluidity (i.e. internal dynamics) remained similar, and showed an increase with force. The bead detachment (a measure of the binding strength) was higher in angiotensin II-treated compared to untreated podocytes. Magnetic twisting confirmed that angiotensin II treatment of podocytes increases and CDTA treatment decreases cell stiffness. However, treatment with both angiotensin II and CDTA increased the cell stiffness only slightly compared to solely CDTA-treated cells. Exposing podocytes to cyclic, uniaxial stretch showed an earlier onset of ERK1/2 phosphorylation compared to MEF (control) cells. These results indicate that angiotensin II might free intracellularly stored calcium and affects actomyosin contraction, and that mechanical stimulation influences cell signaling." @default.
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- W2113334711 date "2011-03-01" @default.
- W2113334711 modified "2023-09-23" @default.
- W2113334711 title "Glomerular podocytes: A study of mechanical properties and mechano-chemical signaling" @default.
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- W2113334711 doi "https://doi.org/10.1016/j.bbrc.2011.02.022" @default.
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