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Abstract
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- Background: Collagenous colitis (CC) and lymphocytic colitis (LC) are chronic inflammatory bowel disorders of unknown etiology. This study investigated phenotypic characteristics of the mucosal lymphocytes in CC and LC.Methods: Lamina propria and intraepithelial lymphocytes (LPLs, IELs) isolated from mucosal biopsies from CC (n = 7), LC (n = 6), as well as LC or CC patients in histopathological remission, (LC-HR) (n = 6) and CC-HR (n = 4) and non-inflamed controls (n = 10) were phenotypically characterized by four-color flow cytometry.Results: The proportions of CD8+ IELs were increased in CC and LC (p < 0.01) compared to controls. Increased proportions of CD45RO+CD8+ IELs and LPLs were observed in LC and even more in CC patients (p < 0.01). Both CC (p < 0.05) and LC patients had elevated proportions of CD4+8+ IELs and LPLs compared to controls. The proportions of CD45RO+ cells were increased in CD4+8+ IELs and LPLs (p < 0.05) in CC and LC patients compared to controls. Both CC (p < 0.05) and LC patients had higher proportions of Ki67+CD8+ IELs and LPLs compared to controls.In contrast, decreased proportions of CD4+ LPLs were observed in CC and LC as well as CD4+ IELs in LC compared to controls. Increased proportions of Ki67+CD4+ IELs and LPLs (p < 0.05) were observed in CC and LC patients. CC-HR but not LC-HR patients demonstrated normalized proportions of both IELs and LPLs compared to CC and LC patients respectively.Conclusion: LC and CC patients have differences in mucosal lymphocyte subsets, with increased proportions of Ki67+ and CD45RO+ CD8+ and CD4+8+ mucosal T cells.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Gastroenterologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Gastroenterology and Hepatology (hsv//eng)
Keyword
- Collagenous colitis
- Lymphocytic colitis
- Flow cytometry
- Lamina propria lymphocytes
- Intraepithelial lymphocytes
- Medicine
- Medicin
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- ref (subject category)
- art (subject category)
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- Journal of Crohn's & Colitis (Search for host publication in LIBRIS)
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- Kumawat, Ashok K ...
- Strid, Hilja
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