scholarly journals Bacteroides ovatus as the Predominant Commensal Intestinal Microbe Causing a Systemic Antibody Response in Inflammatory Bowel Disease

2002 ◽  
Vol 9 (1) ◽  
pp. 54-59 ◽  
Author(s):  
Shin Saitoh ◽  
Satoshi Noda ◽  
Yuji Aiba ◽  
Atsushi Takagi ◽  
Mitsuo Sakamoto ◽  
...  
Keyword(s):  
Inflammatory Bowel Disease ◽  
Antibody Response ◽  
Bowel Disease ◽  
Bacterial Species ◽  
Serum Antibody ◽  
Intestinal Bacteria ◽  
Intestinal Microbes ◽  
Inflammatory Bowel ◽  
Bacteroides Ovatus

ABSTRACT To clarify what bacterial species of commensal intestinal microbes are recognized as the antigens that induce a serum antibody response in patients with inflammatory bowel disease (IBD), 72 subjects consisting of 12 Crohn’s disease patients, 30 ulcerative colitis patients, and 30 healthy volunteers were examined for their titers of serum antibody to these intestinal bacteria. In IBD patients, as a result, significant elevations of both the immunoglobulin G (IgG) and IgA titers to Bacteroides ovatus were found. Immunoblotting showed that a definite 19.5-kDa band of B. ovatus was bound to the serum antibody raised in IBD patients. It was thus concluded that B. ovatus causes serum antibody responses in IBD patients, and a 19.5-kDa molecule of this bacterium appears to be the responsible antigen, although the role of this event in pathogenesis remains unclear.

scholarly journals The Multifaceted Role of Serotonin in Intestinal Homeostasis

2021 ◽  
Vol 22 (17) ◽  
pp. 9487
Author(s):  
Nienke Koopman ◽  
Drosos Katsavelis ◽  
Anne S. ten Hove ◽  
Stanley Brul ◽  
Wouter J. de Jonge ◽  
...  
Keyword(s):  
Inflammatory Bowel Disease ◽  
Bowel Disease ◽  
Current Knowledge ◽  
Bacterial Species ◽  
Disease Course ◽  
Intestinal Homeostasis ◽  
Wide Range ◽  
Range Of Functions ◽  
Inflammatory Bowel

The monoamine serotonin, 5-hydroxytryptamine (5-HT), is a remarkable molecule with conserved production in prokaryotes and eukaryotes and a wide range of functions. In the gastrointestinal tract, enterochromaffin cells are the most important source for 5-HT production. Some intestinal bacterial species are also able to produce 5-HT. Besides its role as a neurotransmitter, 5-HT acts on immune cells to regulate their activation. Several lines of evidence indicate that intestinal 5-HT signaling is altered in patients with inflammatory bowel disease. In this review, we discuss the current knowledge on the production, secretion, and signaling of 5-HT in the intestine. We present an inventory of intestinal immune and epithelial cells that respond to 5-HT and describe the effects of these signaling processes on intestinal homeostasis. Further, we detail the mechanisms by which 5-HT could affect inflammatory bowel disease course and describe the effects of interventions that target intestinal 5-HT signaling.

scholarly journals The Interplay Between Genetic Risk Factors and Proteolytic Dysregulation in the Pathophysiology of Inflammatory Bowel Disease

2020 ◽  
Vol 14 (8) ◽  
pp. 1149-1161 ◽  
Author(s):  
Núria Solà-Tapias ◽  
Nathalie Vergnolle ◽  
Alexandre Denadai-Souza ◽  
Frédérick Barreau
Keyword(s):  
Inflammatory Bowel Disease ◽  
Bowel Disease ◽  
Experimental Colitis ◽  
Functional Proteomics ◽  
Tissue Samples ◽  
Intestinal Microbes ◽  
Abnormal Immune Response ◽  
Inflammatory Bowel ◽  
Cellular Pathways

Abstract Crohn’s disease [CD] and ulcerative colitis [UC] are the two main forms of inflammatory bowel disease [IBD]. Previous studies reported increased levels of proteolytic activity in stool and tissue samples from IBD patients, whereas the re-establishment of the proteolytic balance abrogates the development of experimental colitis. Furthermore, recent data suggest that IBD occurs in genetically predisposed individuals who develop an abnormal immune response to intestinal microbes once exposed to environmental triggers. In this review, we highlight the role of proteases in IBD pathophysiology, and we showcase how the main cellular pathways associated with IBD influence proteolytic unbalance and how functional proteomics are allowing the unambiguous identification of dysregulated proteases in IBD, paving the way to the development of new protease inhibitors as a new potential treatment.

The role of osteopontin (OPN/SSP1) gene variants in inflammatory bowel disease

2009 ◽  
Vol 47 (09) ◽  
Author(s):  
J Glas ◽  
J Seiderer ◽  
HP Török ◽  
B Göke ◽  
T Ochsenkühn ◽  
...  
Keyword(s):  
Inflammatory Bowel Disease ◽  
Bowel Disease ◽  
Gene Variants ◽  
Inflammatory Bowel

Nutrition in inflammatory bowel disease

2009 ◽  
Vol 150 (18) ◽  
pp. 839-845 ◽  
Author(s):  
János Banai
Keyword(s):  
Inflammatory Bowel Disease ◽  
Bowel Disease ◽  
Fast Food ◽  
Optimal Growth ◽  
Developed Countries ◽  
Aetiological Factor ◽  
Artificial Nutrition ◽  
Food Preservatives ◽  
Inflammatory Bowel

Aetiology of inflammatory bowel disease (IBD) is complex and probably multifactorial. Nutrition has been proposed to be an important aetiological factor for development of IBD. Several components of the diet (such as sugar, fat, fibre, fruit and vegetable, protein, fast food, preservatives etc.) were examined as possible causative agents for IBD. According to some researchers infant feeding (breast feeding) may also contribute to the development of IBD. Though the importance of environmental factors is evidenced by the increasing incidence in developed countries and in migrant population in recent decades, the aetiology of IBD remained unclear. There are many theories, but as yet no dietary approaches have been proved to reduce the risk of developing IBD. The role of nutrition in the management of IBD is better understood. The prevention and correction of malnutrition, the provision of macro- and micronutrients and vitamins and the promotion of optimal growth and development of children are key points of nutritional therapy. In active disease, the effective support of energy and nutrients is a very important part of the therapy. Natural and artificial nutrition or the combination of two can be choosen for supporting therapy of IBD. The author summarises the aetiological and therapeutic role of nutrition in IBD.

scholarly journals Tu1789 – Treatment Response to Ustekinumab and Vedolizumab in Inflammatory Bowel Disease: the Predictive Role of Gut Microbiota

2019 ◽  
Vol 156 (6) ◽  
pp. S-1124
Author(s):  
Clara Caenepeel ◽  
Sara Vieira-Silva ◽  
Jorge F. Vázquez-Castellanos ◽  
Bram Verstockt ◽  
Marc Ferrante ◽  
...  
Keyword(s):  
Inflammatory Bowel Disease ◽  
Gut Microbiota ◽  
Treatment Response ◽  
Bowel Disease ◽  
Predictive Role ◽  
Inflammatory Bowel

scholarly journals The role of heme oxygenase and carbon monoxide in inflammatory bowel disease

Redox Report ◽  
2010 ◽  
Vol 15 (5) ◽  
pp. 193-201 ◽  
Author(s):  
Tomohisa Takagi ◽  
Yuji Naito ◽  
Kazuhiko Uchiyama ◽  
Toshikazu Yoshikawa
Keyword(s):  
Inflammatory Bowel Disease ◽  
Carbon Monoxide ◽  
Heme Oxygenase ◽  
Bowel Disease ◽  
Inflammatory Bowel

Ethnic Differences in the Smoking-Related Risk of Inflammatory Bowel Disease: A Systematic Review and Meta-Analysis

2021 ◽  
Author(s):  
Daniele Piovani ◽  
Claudia Pansieri ◽  
Soumya R R Kotha ◽  
Amanda C Piazza ◽  
Celia-Louise Comberg ◽  
...  
Keyword(s):  
Inflammatory Bowel Disease ◽  
Latin American ◽  
Bowel Disease ◽  
Meta Analysis ◽  
Study Data ◽  
Future Research ◽  
Related Risk ◽  
Increased Risk ◽  
Inflammatory Bowel

Abstract Background and aims The association between smoking and inflammatory bowel disease (IBD) relies on old meta-analyses including exclusively non-Jewish White populations. Uncertainty persists regarding the role of smoking in other ethnicities. Methods We systematically searched Medline/PubMed, Embase and Scopus for studies examining tobacco smoking and the risk of developing IBD, i.e., Crohn’s disease (CD) or ulcerative colitis (UC). Two authors independently extracted study data and assessed each study’s risk-of-bias. We examined heterogeneity and small-study effect, and calculated summary estimates using random-effects models. Stratified analyses and meta-regression were employed to study the association between study-level characteristics and effect estimates. The strength of epidemiological evidence was assessed through prespecified criteria. Results We synthesized 57 studies examining the smoking-related risk of developing CD and UC. Non-Jewish White smokers were at increased risk of CD (29 studies; RR: 1.95, 95% CI: 1.69‒2.24; moderate evidence). No association was observed in Asian, Jewish and Latin-American populations (11 studies; RR: 0.97; 95% CI: 0.83–1.13), with no evidence of heterogeneity across these ethnicities. Smokers were at reduced risk of UC (51 studies; RR: 0.55, 95% CI: 0.48–0.64; weak evidence) irrespectively of ethnicity; however, cohort studies, large studies and those recently published showed attenuated associations. Conclusions This meta-analysis did not identify any increased risk of CD in smokers in ethnicities other than non-Jewish Whites, and confirmed the protective effect of smoking on UC occurrence. Future research should characterize the genetic background of CD patients across different ethnicities to improve our understanding on the role of smoking in CD pathogenesis.

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