Coiling of cellular protrusions around extracellular fibers
Abstract
Protrusions at the leading-edge of a cell play an important role in sensing the extracellular cues, during cellular spreading and motility. Recent studies provided indications that these protrusions wrap (coil) around the extra-cellular fibers. The details of this coiling process, and the mechanisms that drive it, are not well understood. We present a combined theoretical and experimental study of the coiling of cellular protrusions on fibers of different geometry. Our theoretical model describes membrane protrusions that are produced by curved membrane proteins that recruit the protrusive forces of actin polymerization, and identifies the role of bending and adhesion energies in orienting the leading-edges of the protrusions along the azimuthal (coiling) direction. Our model predicts that the cell's leading-edge coils on round fibers, but the coiling ceases for a fiber of elliptical (flat) cross-section. These predictions are verified by 3D visualization and quantitation of coiling on suspended fibers using Dual-View light-sheet microscopy (diSPIM). Overall, we provide a theoretical framework supported by high spatiotemporal resolution experiments capable of resolving coiling of cellular protrusions around extracellular fibers of varying diameters.
Keywords
Cite
@article{arxiv.2205.12488,
title = {Coiling of cellular protrusions around extracellular fibers},
author = {Raj Kumar Sadhu and Christian Hernandez-Padilla and Yael Eshed Eisenbach and Lixia Zhang and Harshad D Vishwasrao and Bahareh Behkam and Hari Shroff and Aleš Iglič and Elior Peles and Amrinder S. Nain and Nir S Gov},
journal= {arXiv preprint arXiv:2205.12488},
year = {2022}
}
Comments
21 pages, 14 figures