AI Article Synopsis
- Cytoplasmic streaming involves molecular motors that transport cargo along microtubules while influencing the surrounding fluid.
- Research in fruit fly oocyte development reveals a shift from a chaotic cytoskeleton with short-range fluid flows to a more organized system demonstrating large-scale rotational motion.
- To explore the role of fluid-structure interactions in this transition, both a discrete-filament model and a continuum theory were developed, showing a propensity for spiraling movement consistent with experimental observations.
Article Abstract
In the cellular phenomena of cytoplasmic streaming, molecular motors carrying cargo along a network of microtubules entrain the surrounding fluid. The piconewton forces produced by individual motors are sufficient to deform long microtubules, as are the collective fluid flows generated by many moving motors. Studies of streaming during oocyte development in the fruit fly Drosophila melanogaster have shown a transition from a spatially disordered cytoskeleton, supporting flows with only short-ranged correlations, to an ordered state with a cell-spanning vortical flow. To test the hypothesis that this transition is driven by fluid-structure interactions, we study a discrete-filament model and a coarse-grained continuum theory for motors moving on a deformable cytoskeleton, both of which are shown to exhibit a swirling instability to spontaneous large-scale rotational motion, as observed.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7616086 | PMC |
| http://dx.doi.org/10.1103/PhysRevLett.126.028103 | DOI Listing |
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