stress fibers

stress fi·bers

long bundles of microfilaments made up of actin; believed to be involved in the attachment of cultured cells to a substratum and also in the determination of the shape of cells such as fibroblasts; may be involved in cellular mobility.
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Each of the four multi-layered limbs are precisely matched based on deflection values and are laminated, pressed and machined without ever cutting through critical stress fibers. This, plus their Uniform Stress Distribution design, allows the limbs to withstand Hoyt's brutal 1,500 dryfire test at 80 pounds and a 30-inch draw length, which produces more than 104 foot-pounds of kinetic energy!
Several studies have shown that ArhGAP11A can regulate the biological activity of Rho A, which is involved in tumor cell invasion and metastasis.[1],[2],[4],[5] The GTP structure of Rho A can stimulate the formation of focal adhesions and stress fibers by activating Rho-associated protein kinase (ROCK) or mammalian diaphanous protein.
In this poster Goldfinch Bio researchers demonstrated that TRPC5 nanomolar inhibitory activity, selectivity across other TRP channels and TRPC subtype specificity; prevention of the loss of stress fibers that are critical in maintaining kidney function, including protection against protamine sulfate induced loss of stress fibers and restoration of stress fibers in podocytes after knockdown of synaptopodin; suppression of pathogenic podocyte motility in a scratch assay; and amelioration of proteinuria in hypertension-induced FSGS in relevant preclinical models without altering blood pressure.
The presence of stress fibers, the number of mitoses, the size of the cells, and the granulation of the cytoplasm were registered in different comparison groups.
This morphology modification is a consequence of parallel arrangement and orientation of the actin filaments, to the rearrangement of F-actin in well-defined stress fibers as well as a change in its pattern.
Rho-GTPase participates in signaling pathways leading to the formation of actin stress fibers and focal adhesions.
Number of stress fibers seemed to be decreased, and the remaining actin bundles (arrows) made spikes.
From the stress analysis the most intense stress fibers boundary zone section, compressed and stretched zone are identified.
The formation of F-actin stress fibers was assessed via immunostaining with phalloidin and examined using confocal microscopy.
It has been suggested that bone cells may produce stress fibers to maintain their desired morphology in the face of chronic applied tension.
After one month of cell expansion, the researchers saw a threefold increase in the size of the cell nucleus and the spreading area, along with an increase in stress fibers. Notably, none of the new, proliferating cells glowed green, which meant that their lineage could not be traced back to the mature smooth muscle cells originally isolated from the blood vessels.
The cells produce a large number of stress fibers composed of alpha-Smooth Muscle Actin ([alpha]-SMA) in order to increase their retractile properties.