Article ; Online: From intestinal stem cells to inflammatory bowel diseases.
World journal of gastroenterology
2011 Volume 17, Issue 27, Page(s) 3198–3203
Abstract: The pathogenesis of both entities of inflammatory bowel disease (IBD), namely Crohn's disease (CD) and ulcerative colitis (UC), is still complex and under investigation. The importance of the microbial flora in developing IBD is beyond debate. In the ... ...
Abstract | The pathogenesis of both entities of inflammatory bowel disease (IBD), namely Crohn's disease (CD) and ulcerative colitis (UC), is still complex and under investigation. The importance of the microbial flora in developing IBD is beyond debate. In the last few years, the focus has changed from adaptive towards innate immunity. Crohn's ileitis is associated with a deficiency of the antimicrobial shield, as shown by a reduced expression and secretion of the Paneth cell defensin HD5 and HD6, which is related to a Paneth cell differentiation defect mediated by a diminished expression of the Wnt transcription factor TCF4. In UC, the protective mucus layer, acting as a physical and chemical barrier between the gut epithelium and the luminal microbes, is thinner and in part denuded as compared to controls. This could be caused by a missing induction of the goblet cell differentiation factors Hath1 and KLF4 leading to immature goblet cells. This defective Paneth and goblet cell differentiation in Crohn's ileitis and UC may enable the luminal microbes to invade the mucosa and trigger the inflammation. The exact molecular mechanisms behind ileal CD and also UC must be further clarified, but these observations could give rise to new therapeutic strategies based on a stimulation of the protective innate immune system. |
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MeSH term(s) | Basic Helix-Loop-Helix Leucine Zipper Transcription Factors/metabolism ; Basic Helix-Loop-Helix Transcription Factors/metabolism ; Cell Differentiation ; Colitis, Ulcerative/diagnosis ; Crohn Disease/diagnosis ; Goblet Cells/cytology ; Humans ; Inflammatory Bowel Diseases/diagnosis ; Inflammatory Bowel Diseases/pathology ; Intestinal Mucosa/pathology ; Intestines/cytology ; Kruppel-Like Transcription Factors/metabolism ; Paneth Cells/pathology ; Stem Cells/cytology ; Transcription Factor 4 ; Transcription Factors/metabolism ; alpha-Defensins/metabolism |
Chemical Substances | ATOH1 protein, human ; Basic Helix-Loop-Helix Leucine Zipper Transcription Factors ; Basic Helix-Loop-Helix Transcription Factors ; GKLF protein ; Kruppel-Like Transcription Factors ; TCF4 protein, human ; Transcription Factor 4 ; Transcription Factors ; alpha-Defensins |
Language | English |
Publishing date | 2011-09-07 |
Publishing country | United States |
Document type | Journal Article ; Research Support, Non-U.S. Gov't ; Review |
ZDB-ID | 2185929-2 |
ISSN | 2219-2840 ; 1007-9327 |
ISSN (online) | 2219-2840 |
ISSN | 1007-9327 |
DOI | 10.3748/wjg.v17.i27.3198 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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