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- W291251 abstract "Disruption of microtubules (mt) of bovine aortic endothelial (BAE) cells, and normal and transformed fibroblasts, by exposure to 2.5 ..mu..M colchicine; 12 ..mu..M vinblastine; or 1 ..mu..M nocodazole, for 5 or 20 hrs results in aggregation of vimentin-intermediate filament (IF) and the development of markedly augmented stress fiber (SF) arrays. After disassembly of mt, confluent BAE, with circumferential marginal microfilament bands and few central SF, develop dense ribbon-like SF arrays, and spontaneously transformed fibroblasts (tHmf-e), which before treatment are apolar or epithelioid and have few or no SF, acquire extensive organized SF arrays. The axially oriented SF span the entire cell length and terminate in vinculin-containing adhesion plaques, polarizing these cells. The visible increase in SF associated actin is not accompanied by an increase either in actin synthesis (determined from electropherograms after pulse labeling with (/sup 35/S)methionine), or content (DNAse I assay for total cell actin). The reorganization of actin into SF and the development of vinculin adhesion plaques is independent of protein synthesis and occurs in the presence of cycloheximide (10 ..mu..g/ml). These results suggest a role for mt and IF in the regulation of the organizational state of the actin-based cytoskeleton." @default.
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- W291251 date "1986-03-01" @default.
- W291251 modified "2023-09-24" @default.
- W291251 title "Augmented stress fiber arrays after cytopharmacologic disassembly of microtubules" @default.
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