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Four Variants of SLCO2A1 Identified in Three Chinese Patients with Chronic Enteropathy Associated with the SLCO2A1 Gene
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Four Variants of SLCO2A1 Identified in Three Chinese Patients with Chronic Enteropathy Associated with the SLCO2A1 Gene
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Four Variants of SLCO2A1 Identified in Three Chinese Patients with Chronic Enteropathy Associated with the SLCO2A1 Gene
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Journal Article
Four Variants of SLCO2A1 Identified in Three Chinese Patients with Chronic Enteropathy Associated with the SLCO2A1 Gene
2021
Overview
BackgroundChronic enteropathy associated with the SLCO2A1 gene (CEAS) is an enteropathy characterized by multiple small intestinal ulcers of nonspecific histology, also known as chronic nonspecific multiple ulcers of the small intestine. The SLCO2A1 gene encodes a prostaglandin transporter (PGT).AimsThe aim of this study was to investigate the clinical characteristics of ten Chinese patients with intestinal ulcers of unknown origin, screen them for variants of SLCO2A1, and to investigate the expression of PGT in the small intestinal mucosa of patients with CEAS.MethodsTen Chinese patients with intestinal ulcers of unknown origin were included in this study. Blood samples were collected for whole-exome sequencing and Sanger sequencing of candidate gene variants. Immunohistochemical staining was used to investigate the expression of PGT.ResultsThese ten patients were clinically diagnosed with intestinal ulcers of unknown origin based on criteria established according to earlier publications. Three of them were genetically diagnosed as having CEAS and four candidate variants of the SLCO2A1 gene were identified, among which c.941-1G>A, c.178G>A and c.1681C>T were detected in patients with CEAS for the first time. The terminal ileum was involved in all three patients with CEAS in our study, which was different from the results of Japanese patients. The expression of PGT in the vascular endothelial cells of the intestinal mucosa tissues of patients with CEAS was negative or intermediate.ConclusionWe summarized the clinical data of ten Chinese patients with intestinal ulcers of unknown origin and identified three novel SLCO2A1 variants from three patients with CEAS. This study improves our understanding of CEAS and broadens the spectrum of SLCO2A1 variants known to cause CEAS.
Publisher
Springer Nature B.V
Subject
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