{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,2]],"date-time":"2026-10-02T09:09:37Z","timestamp":1790932177131,"version":"4.1.0"},"reference-count":255,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2024,4,25]],"date-time":"2024-04-25T00:00:00Z","timestamp":1714003200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100000053","name":"National Institute of Health\/National Eye Institute","doi-asserted-by":"publisher","award":["R01EY029289"],"award-info":[{"award-number":["R01EY029289"]}],"id":[{"id":"10.13039\/100000053","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Cells"],"abstract":"<jats:p>Stem cells (SCs) undergo asymmetric division, producing transit-amplifying cells (TACs) with increased proliferative potential that move into tissues and ultimately differentiate into a specialized cell type. Thus, TACs represent an intermediary state between stem cells and differentiated cells. In the cornea, a population of stem cells resides in the limbal region, named the limbal epithelial stem cells (LESCs). As LESCs proliferate, they generate TACs that move centripetally into the cornea and differentiate into corneal epithelial cells. Upon limbal injury, research suggests a population of progenitor-like cells that exists within the cornea can move centrifugally into the limbus, where they dedifferentiate into LESCs. Herein, we summarize recent advances made in understanding the mechanism that governs the differentiation of LESCs into TACs, and thereafter, into corneal epithelial cells. We also outline the evidence in support of the existence of progenitor-like cells in the cornea and whether TACs could represent a population of cells with progenitor-like capabilities within the cornea. Furthermore, to gain further insights into the dynamics of TACs in the cornea, we outline the most recent findings in other organ systems that support the hypothesis that TACs can dedifferentiate into SCs.<\/jats:p>","DOI":"10.3390\/cells13090748","type":"journal-article","created":{"date-parts":[[2024,4,26]],"date-time":"2024-04-26T09:26:02Z","timestamp":1714123562000},"page":"748","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["The Potential Reversible Transition between Stem Cells and Transient-Amplifying Cells: The Limbal Epithelial Stem Cell Perspective"],"prefix":"10.3390","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-2891-1987","authenticated-orcid":false,"given":"Sudhir","family":"Verma","sequence":"first","affiliation":[{"name":"College of Optometry, University of Houston, 4901 Calhoun Road, Houston, TX 77204, USA"},{"name":"Deen Dayal Upadhyaya College, University of Delhi, Delhi 110078, India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5867-6455","authenticated-orcid":false,"given":"Xiao","family":"Lin","sequence":"additional","affiliation":[{"name":"College of Optometry, University of Houston, 4901 Calhoun Road, Houston, TX 77204, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5848-0225","authenticated-orcid":false,"given":"Vivien J.","family":"Coulson-Thomas","sequence":"additional","affiliation":[{"name":"College of Optometry, University of Houston, 4901 Calhoun Road, Houston, TX 77204, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2024,4,25]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"145","DOI":"10.1667\/RRXX28.1","article-title":"A Direct Measurement of the Radiation Sensitivity of Normal Mouse Bone Marrow Cells","volume":"175","author":"Till","year":"1961","journal-title":"Radiat. 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