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Ozeki K, Nishigaki R, Kanno T, Kataoka H. Ulcerative Colitis with Oral Extension of Squamous Epithelium. Intern Med 2024; 63:877-878. [PMID: 37468239 PMCID: PMC11008983 DOI: 10.2169/internalmedicine.2255-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Accepted: 06/05/2023] [Indexed: 07/21/2023] Open
Affiliation(s)
- Keiji Ozeki
- Department of Gastroenterology and Metabolism, Nagoya City University Graduate School of Medical Sciences, Japan
| | - Ruriko Nishigaki
- Department of Gastroenterology and Metabolism, Nagoya City University Graduate School of Medical Sciences, Japan
| | - Takuya Kanno
- Department of Gastroenterology and Metabolism, Nagoya City University Graduate School of Medical Sciences, Japan
| | - Hiromi Kataoka
- Department of Gastroenterology and Metabolism, Nagoya City University Graduate School of Medical Sciences, Japan
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Abstract
Our understanding of the biology of the intestinal epithelium has advanced since the establishment of an organoid culture system. Although organoids have enabled investigation of the mechanism of self-renewal of human intestinal stem cells in vitro, it remains difficult to clarify the behavior of human normal and diseased intestinal epithelium in vivo. Recently, we developed a xenotransplantation system in which human intestinal organoids are engrafted onto epithelium-depleted mouse colons. This xenograft recapitulated the original tissue structures. Upon xenotransplantation, normal colon organoids developed normal colon crypt structures without tumorigenesis, whereas tumor-derived organoids formed colonic tumors resembling the original tumors. The non-tumorigenicity of human intestinal organoids highlights the safety of organoid-based regenerative medicine. As an example of regenerative medicine for short bowel syndrome, we devised a unique organ-repurposing approach to convert colons into small intestines by organoid transplantation. In this approach, the transplanted rat small intestinal organoids not only engrafted onto the rat colons but also remodeled the colon subepithelial structures into a small intestine-like conformation. Luminal flow accelerated the maturation of villi in the small intestine, which promoted the formation of a lymphovascular network mimicking lacteals. In this review, we provide an overview of recent advances in gastrointestinal organoid transplantation and share our understanding of human disease biology and regenerative medicine derived from these studies.
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Liu CY, Girish N, Gomez ML, Dubé PE, Washington MK, Simons BD, Polk DB. Transitional Anal Cells Mediate Colonic Re-epithelialization in Colitis. Gastroenterology 2022; 162:1975-1989. [PMID: 35227778 PMCID: PMC9402284 DOI: 10.1053/j.gastro.2022.02.031] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 02/11/2022] [Accepted: 02/14/2022] [Indexed: 01/14/2023]
Abstract
BACKGROUND & AIMS Epithelial wound healing is compromised and represents an unleveraged therapeutic target in inflammatory bowel disease (IBD). Intestinal epithelial cells exhibit plasticity that facilitates dedifferentiation and repair during the response to injury. However, it is not known whether epithelial cells of a neighboring organ can be activated to mediate re-epithelialization in acute colitis. Histological findings of a permanent squamous tissue structure in the distal colon in human IBD could suggest diverse cellular origins of repair-associated epithelium. Here, we tested whether skin-like cells from the anus mediate colonic re-epithelialization in murine colitis. METHODS We studied dextran sulfate sodium-induced colitis and interleukin 10-deficient colitis in transgenic mice. We performed lineage tracing, 3-dimensional (3D) imaging, single-cell transcriptomics, and biophysical modeling to map squamous cell fates and to identify squamous cell types involved in colonic repair. RESULTS In acute and chronic colitis, we found a large squamous epithelium, called squamous neo-epithelium of the colon (SNEC), near the anorectal junction. Neighboring squamous cells of the anus rapidly migrate into the ulcerated colon and establish this permanent epithelium of crypt-like morphology. These squamous cells derive from a small unique transition zone, distal to the border of colonic and anal epithelium, that resists colitic injury. The cells of this zone have a pre-loaded program of colonic differentiation and further upregulate key aspects of colonic epithelium during repair. CONCLUSION Transitional anal cells represent unique reserve cells capable of rebuilding epithelial structures in the colon after colitis. Further study of these cells could reveal novel approaches to direct mucosal healing in inflammation and disease.
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Affiliation(s)
- Cambrian Y Liu
- Division of Pediatric Gastroenterology and Nutrition, The Saban Research Institute, Children's Hospital Los Angeles, Los Angeles, California; Department of Medicine, The University of Chicago, Chicago, Illinois
| | - Nandini Girish
- Division of Pediatric Gastroenterology and Nutrition, The Saban Research Institute, Children's Hospital Los Angeles, Los Angeles, California; Department of Pediatrics, Division of Gastroenterology, Hepatology, and Nutrition, Rady Children's Hospital San Diego, University of California San Diego, San Diego, California
| | - Marie L Gomez
- Division of Pediatric Gastroenterology and Nutrition, The Saban Research Institute, Children's Hospital Los Angeles, Los Angeles, California; Department of Pediatrics, Department of Biochemistry and Molecular Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, California
| | - Philip E Dubé
- Division of Pediatric Gastroenterology and Nutrition, The Saban Research Institute, Children's Hospital Los Angeles, Los Angeles, California
| | - M Kay Washington
- Department of Pathology, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Benjamin D Simons
- Wellcome Trust/Cancer Research UK Gurdon Institute, University of Cambridge, Cambridge, United Kingdom; Department of Applied Mathematics and Theoretical Physics, Centre for Mathematical Sciences, University of Cambridge, Cambridge, United Kingdom; Wellcome Trust/Medical Research Council Stem Cell Institute, University of Cambridge, Cambridge, United Kingdom
| | - D Brent Polk
- Division of Pediatric Gastroenterology and Nutrition, The Saban Research Institute, Children's Hospital Los Angeles, Los Angeles, California; Department of Pediatrics, Division of Gastroenterology, Hepatology, and Nutrition, Rady Children's Hospital San Diego, University of California San Diego, San Diego, California; Department of Pediatrics, Department of Biochemistry and Molecular Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, California.
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