{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,30]],"date-time":"2026-07-30T11:38:12Z","timestamp":1785411492704,"version":"3.56.0"},"reference-count":109,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2026,4,30]],"date-time":"2026-04-30T00:00:00Z","timestamp":1777507200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100000002","name":"National Institutes of Health","doi-asserted-by":"crossref","award":["DK57819"],"award-info":[{"award-number":["DK57819"]}],"id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"crossref"}]},{"DOI":"10.13039\/100000002","name":"National Institutes of Health","doi-asserted-by":"crossref","award":["DK68491"],"award-info":[{"award-number":["DK68491"]}],"id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"crossref"}]},{"award":["DK57819"],"award-info":[{"award-number":["DK57819"]}],"id":[{"id":"https:\/\/ror.org\/045p44t13","id-type":"ROR","asserted-by":"publisher"}]},{"award":["DK68491"],"award-info":[{"award-number":["DK68491"]}],"id":[{"id":"https:\/\/ror.org\/045p44t13","id-type":"ROR","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000738","name":"US Department of Veterans Affairs","doi-asserted-by":"publisher","award":["BX000332"],"award-info":[{"award-number":["BX000332"]}],"id":[{"id":"10.13039\/100000738","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["ncRNA"],"abstract":"<jats:p>The mammalian intestinal epithelium is a rapid self-renewal tissue in the body, serving as a critical interface between the host and the external environment. Maintaining the intestinal epithelium homeostasis requires precise coordination of cellular processes, including proliferation, migration, differentiation, autophagy, and cell-to-cell interaction. An increasing body of evidence has unveiled circular RNAs (circRNAs) as abundant and stable regulatory molecules that play pivotal roles in the intestinal epithelial biology and are intimately involved in many aspects of gut mucosal pathologies. Unlike linear RNAs, circRNAs form covalently closed loop structures through back-splicing events, conferring remarkable stability and resistance to exonucleolytic degradation. circRNAs regulate the growth of the intestinal mucosa, injury-induced epithelial regeneration, and gut barrier function via diverse mechanisms, including interactions with microRNAs and RNA-binding proteins. Deregulated circRNAs are implicated in the pathogenesis of various gut mucosal disorders such as inflammatory bowel disease and malignancies. In this review, we highlight pathobiological functions and mechanisms of intestinal epithelium-enriched circRNAs, particularly circHIPK3, Cdrlas, and circPABPN1, in the epithelium homeostasis and pathologies and also discuss potential clinical application of circRNAs as diagnostic biomarkers and therapeutic targets in patients with critical diseases.<\/jats:p>","DOI":"10.3390\/ncrna12030014","type":"journal-article","created":{"date-parts":[[2026,4,30]],"date-time":"2026-04-30T08:03:47Z","timestamp":1777536227000},"page":"14","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Circular RNAs in Intestinal Mucosal Homeostasis and Pathologies"],"prefix":"10.3390","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1088-456X","authenticated-orcid":false,"given":"Hee Kyoung","family":"Chung","sequence":"first","affiliation":[{"name":"Cell Biology Group, Department of Surgery, University of Maryland School of Medicine, Baltimore, MD 21201, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lan","family":"Xiao","sequence":"additional","affiliation":[{"name":"Cell Biology Group, Department of Surgery, University of Maryland School of Medicine, Baltimore, MD 21201, USA"},{"name":"Baltimore Veterans Affairs Medical Center, Baltimore, MD 21201, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jian-Ying","family":"Wang","sequence":"additional","affiliation":[{"name":"Cell Biology Group, Department of Surgery, University of Maryland School of Medicine, Baltimore, MD 21201, USA"},{"name":"Baltimore Veterans Affairs Medical Center, Baltimore, MD 21201, USA"},{"name":"Department of Pathology, University of Maryland School of Medicine, Baltimore, MD 21201, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,4,30]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1856","DOI":"10.1101\/gad.1674008","article-title":"The intestinal stem cell","volume":"22","author":"Barker","year":"2008","journal-title":"Genes Dev."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"241","DOI":"10.1146\/annurev.physiol.010908.163145","article-title":"Stem cells, self-renewal, and differentiation in the intestinal epithelium","volume":"71","author":"Clevers","year":"2009","journal-title":"Annu. 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