[Immunohistologic changes of the intestinal mucosa in chronic inflammatory bowel diseases]
1Semmelweis Egyetem, Altalános Orvostudományi Kar, I. Gyermekklinika, Budapest. arato@gyer1.sote.hu
Insights
This review details immune reactions in inflammatory bowel disease (IBD), focusing on lymphocyte distribution, cytokine patterns, and epithelial changes in Crohn's disease and ulcerative colitis. It highlights the role of immune cells and lost oral tolerance in IBD pathogenesis.
Area of Science:
- Immunology
- Gastroenterology
- Cell Biology
Context:
- Inflammatory bowel disease (IBD) pathogenesis involves heightened immune responses in the intestinal mucosa.
- Immunohistological methods have advanced the understanding of these immune reactions.
- This review synthesizes current knowledge on immune cell dynamics and epithelial changes in IBD.
Purpose:
- To detail the distribution of lymphocyte subsets and plasma cells in Crohn's disease (CD) and ulcerative colitis (UC).
- To present findings on increased adhesion molecule expression and distinct cytokine profiles in CD and UC.
- To review epithelial cell turnover, MHC II antigen expression, and the role of lost oral tolerance in IBD.
Summary:
- IBD is characterized by increased immune reactions, including specific lymphocyte and plasma cell distributions in Crohn's disease and ulcerative colitis.
- Elevated expression of adhesion molecules, distinct cytokine patterns, and rapid epithelial turnover (proliferation and apoptosis) are key features.
- Epithelial expression of MHC II antigen and the loss of oral tolerance are significant pathogenetic factors in inflammatory bowel disease.
Impact:
- Provides a comprehensive overview of the immunological and cellular mechanisms underlying IBD.
- Highlights key differences in immune responses between Crohn's disease and ulcerative colitis.
- Offers insights into potential therapeutic targets for managing inflammatory bowel disease.
Abstract:
In the pathogenesis of inflammatory bowel disease abnormally increased immune reactions in the intestinal mucosa play a basic role. The revealing of these reactions was facilitated by the rapidly spreading immunohistological methods in last decades. This review discusses in detail the characteristic distribution of lymphocyte subsets and plasma cells in Crohn's disease and ulcerative colitis. Results indicating increased expression of adhesion molecules are also presented, as well as the different patterns of cytokine production in Crohn's disease and ulcerative colitis. The rapid epithelial turnover developing as a consequence of increased rate of proliferation and apoptosis in inflammatory bowel disease is also shown. The epithelial expression of MHC II antigen in colonic mucosa which is not observed in healthy subjects is also discussed. In addition, the pathogenetic role of lost oral tolerance in the development of inflammatory bowel is reviewed in detail.
Related Concept Videos
Chronic Bowel Disorders: Introduction
Irritable Bowel Syndrome (IBS) is a common disorder affecting the gastrointestinal tract. The distinctive feature is recurrent abdominal pain associated with altered bowel movements, manifesting as constipation, diarrhea, or fluctuating between both. The...
Histology of the Small Intestine
The intestinal lining features transverse folds called circular folds, each housing fingerlike projections known as intestinal villi. These villi are covered by a layer of simple columnar epithelium, also referred to as...
Inflammatory Bowel Disease II: Crohn's Disease
Inflammatory bowel disease, commonly known as IBD, refers to a collection of disorders that lead to persistent inflammation of the gastrointestinal tract. The two types of IBD are ulcerative colitis, which impacts the colon, and Crohn's disease, which can involve any part of the gastrointestinal segment.
Crohn's disease
Crohn's disease is a chronic, systemic inflammatory bowel disease (IBD) that predominantly affects the gastrointestinal tract. It is marked by transmural...
Inflammatory Bowel Disease I: Introduction
Inflammatory Bowel Disease II: Ulcerative Colitis
Inflammatory Bowel Disease III: Crohn's Disease


