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- W2056476752 abstract "Mechanical stretch regulates alpha-smooth muscle actin (SMA) expression in myofibroblasts but limited replication and cellular heterogeneity have hampered definitive studies in vitro. We examined the role of applied force in regulating SMA expression in conditionally immortalized cardiac fibroblast lines derived from H-2Kb-tsA58 transgenic mice. When plated in differentiating conditions (37 degrees C without interferon-gamma), transgenic myofibroblasts exhibited vimentin staining, no desmin staining and abundant SMA in well-developed stress fibers that were indistinguishable from controls. Magnetically-generated tensile forces (approximately 500 pN/cell) applied through collagen-coated magnetite beads selectively reduced SMA but not beta-actin mRNA and protein content in both cell types. The early loss of SMA was due in part to selective leakage into the cell culture medium. Depolymerization of actin filaments with cytochalasin D blocked the force-induced reduction of SMA. Cardiac fibroblast lines established from H-2Kb-tsA58 transgenic mice provide a phenotypically stable source of cells for studying the role of physical forces in regulating SMA." @default.
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- W2056476752 date "2001-02-01" @default.
- W2056476752 modified "2023-09-27" @default.
- W2056476752 title "Use of conditionally immortalized mouse cardiac fibroblasts to examine the effect of mechanical stretch on α-smooth muscle actin" @default.
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- W2056476752 doi "https://doi.org/10.1054/tice.2000.0160" @default.
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