{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,24]],"date-time":"2026-04-24T18:06:19Z","timestamp":1777053979873,"version":"3.51.4"},"reference-count":69,"publisher":"Public Library of Science (PLoS)","issue":"3","license":[{"start":{"date-parts":[[2022,3,18]],"date-time":"2022-03-18T00:00:00Z","timestamp":1647561600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100000002","name":"National Institutes of Health","doi-asserted-by":"publisher","award":["GM128193"],"award-info":[{"award-number":["GM128193"]}],"id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["www.ploscompbiol.org"],"crossmark-restriction":false},"short-container-title":["PLoS Comput Biol"],"abstract":"<jats:p>\n                    Epithelial tissues constitute an exotic type of active matter with non-linear properties reminiscent of amorphous materials. In the context of a proliferating epithelium, modeled by the quasistatic vertex model, we identify novel discrete tissue scale rearrangements, i.e. cellular rearrangement avalanches, which are a form of collective cell movement. During the avalanches, the vast majority of cells retain their neighbors, and the resulting cellular trajectories are radial in the periphery, a vortex in the core. After the onset of these avalanches, the epithelial area grows discontinuously. The avalanches are found to be stochastic, and their strength is correlated with the density of cells in the tissue. Overall, avalanches redistribute accumulated local spatial pressure along the tissue. Furthermore, the distribution of avalanche magnitudes is found to obey a power law, with an exponent consistent with sheer induced avalanches in amorphous materials. To understand the role of avalanches in organ development, we simulate epithelial growth of the\n                    <jats:italic>Drosophila<\/jats:italic>\n                    eye disc during the third instar using a computational model, which includes both chemical and mechanistic signaling. During the third instar, the morphogenetic furrow (MF), a ~10 cell wide wave of apical area constriction propagates through the epithelium. These simulations are used to understand the details of the growth process, the effect of the MF on the growth dynamics on the tissue scale, and to make predictions for experimental observations. The avalanches are found to depend on the strength of the apical constriction of cells in the MF, with a stronger apical constriction leading to less frequent and more pronounced avalanches. The results herein highlight the dependence of simulated tissue growth dynamics on relaxation timescales, and serve as a guide for\n                    <jats:italic>in vitro<\/jats:italic>\n                    experiments.\n                  <\/jats:p>","DOI":"10.1371\/journal.pcbi.1009952","type":"journal-article","created":{"date-parts":[[2022,3,18]],"date-time":"2022-03-18T13:23:56Z","timestamp":1647609836000},"page":"e1009952","update-policy":"https:\/\/doi.org\/10.1371\/journal.pcbi.corrections_policy","source":"Crossref","is-referenced-by-count":4,"title":["Avalanches during epithelial tissue growth; Uniform Growth and a drosophila eye disc model"],"prefix":"10.1371","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8622-6251","authenticated-orcid":true,"given":"George","family":"Courcoubetis","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2455-0539","authenticated-orcid":true,"given":"Chi","family":"Xu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sergey V.","family":"Nuzhdin","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Stephan","family":"Haas","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"340","published-online":{"date-parts":[[2022,3,18]]},"reference":[{"key":"pcbi.1009952.ref001","doi-asserted-by":"crossref","first-page":"2227","DOI":"10.1016\/S0006-3495(98)77932-9","article-title":"Viscoelastic Properties of Living Embryonic Tissues: a Quantitative Study","volume":"74","author":"G Forgacs","year":"1998","journal-title":"Biophysical Journal"},{"key":"pcbi.1009952.ref002","doi-asserted-by":"crossref","first-page":"20130726","DOI":"10.1098\/rsif.2013.0726","article-title":"Glassy dynamics in three-dimensional embryonic tissues","volume":"10","author":"E-M Sch\u00f6tz","year":"2013","journal-title":"Journal of The Royal Society Interface"},{"key":"pcbi.1009952.ref003","doi-asserted-by":"crossref","first-page":"4714","DOI":"10.1073\/pnas.1010059108","article-title":"Glass-like dynamics of collective cell migration","volume":"108","author":"TE Angelini","year":"2011","journal-title":"PNAS"},{"key":"pcbi.1009952.ref004","doi-asserted-by":"crossref","first-page":"040301","DOI":"10.1103\/PhysRevE.84.040301","article-title":"Active jamming: Self-propelled soft particles at high density","volume":"84","author":"S Henkes","year":"2011","journal-title":"Phys Rev E"},{"key":"pcbi.1009952.ref005","doi-asserted-by":"crossref","first-page":"220602","DOI":"10.1103\/PhysRevLett.112.220602","article-title":"Nonequilibrium Glassy Dynamics of Self-Propelled Hard Disks","volume":"112","author":"L. 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