scholarly journals The Immunological Basis of Inflammatory Bowel Disease

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
Francesca A. R. Silva ◽  
Bruno L. Rodrigues ◽  
Maria de Lourdes S. Ayrizono ◽  
Raquel F. Leal
Keyword(s):  
Th17 Cells ◽  
Inflammatory Process ◽  
Adaptive Immune System ◽  
Treg Cells ◽  
Intestinal Wall ◽  
Adaptive Immune ◽  
Current State ◽  
Bowel Diseases ◽  
Inflammatory Bowel ◽  
Inflammatory Profile

Inflammatory bowel diseases (IBDs) are chronic ailments, Crohn’s disease and ulcerative colitis being the most important. These diseases present an inflammatory profile and they differ according to pathophysiology, the affected area in the gastrointestinal tract, and the depth of the inflammation in the intestinal wall. The immune characteristics of IBD arise from abnormal responses of the innate and adaptive immune system. The number of Th17 cells increases in the peripheral blood of IBD patients, while Treg cells decrease, suggesting that the Th17/Treg proportion plays an important role in the development and maintenance of inflammation. The purpose of this review was to determine the current state of knowledge on the immunological basis of IBD. Many studies have shown the need for further explanation of the development and maintenance of the inflammatory process.

Immune and nonimmune components orchestrate the pathogenesis of inflammatory bowel disease

2011 ◽  
Vol 300 (5) ◽  
pp. G716-G722 ◽  
Author(s):  
Silvio Danese
Keyword(s):  
Inflammatory Bowel Disease ◽  
Immune System ◽  
Immune Cells ◽  
Bowel Disease ◽  
Inflammatory Process ◽  
Adaptive Immune System ◽  
Cell Type ◽  
Current Role ◽  
Adaptive Immune ◽  
Inflammatory Bowel

Inflammatory bowel disease (IBD) pathogenesis is driven by the interactions between the innate and the adaptive immune system. Both systems are actually expressed not only by immune cells, but also by essentially all types of nonimmune cells. Nonimmune cells have classically been considered as simple targets of the aberrant inflammatory process occurring in IBD. However, the discovery that many of the functions traditionally attributed to immune cells are also performed by nonimmune cells has caused a shift to a multidirectional hypothesis in which nonimmune cells and even acellular elements are considered active players of IBD pathogenesis. The aim of this review is to summarize the current role played by each cell type in IBD pathogenesis.

scholarly journals Pre- and Posttherapy Assessment of Intestinal Soluble Mediators in IBD: Where We Stand and Future Perspectives

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
F. Scaldaferri ◽  
V. Petito ◽  
L. Lopetuso ◽  
G. Bruno ◽  
V. Gerardi ◽  
...  
Keyword(s):  
Inflammatory Process ◽  
Molecular Level ◽  
Adaptive Immune System ◽  
Mucosal Healing ◽  
Inflammatory Condition ◽  
Future Perspectives ◽  
Adaptive Immune ◽  
Abnormal Immune Response ◽  
Chronic Inflammatory Condition ◽  
Inflammatory Bowel

Inflammatory bowel disease (IBD) is a chronic inflammatory condition characterized by an abnormal immune response against food or bacterial antigens in genetically predisposed individuals. Several factors of innate and adaptive immune system take part in the inflammatory process, probably actively contributing in endoscopic and histological healing at molecular level. Although it is difficult to discriminate whether they are primary factors in determining these events or they are secondarily involved, it would be interesting to have a clear map of those factors in order to have a restricted number of potentially “good candidates” for mucosal healing. The present review will present a class of these factors and their modulation in course of therapy, starting from pathogenic studies involving several treatments associated with good clinical outcomes. This approach is meant to help in the difficult task of identifying “good candidates” for healing signatures, which could also be possible new therapeutic targets for clinical management of IBD patients.

scholarly journals The role of epigenetic modifications for the pathogenesis of Crohn's disease

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
M. Hornschuh ◽  
E. Wirthgen ◽  
M. Wolfien ◽  
K. P. Singh ◽  
O. Wolkenhauer ◽  
...  
Keyword(s):  
Crohn’S Disease ◽  
Crohn's Disease ◽  
Adaptive Immune Response ◽  
Adaptive Immune ◽  
Bowel Diseases ◽  
Inflammatory Bowel ◽  
New Biomarkers ◽  
Insight Into ◽  
Specific Evaluation

AbstractEpigenetics has become a promising field for finding new biomarkers and improving diagnosis, prognosis, and drug response in inflammatory bowel disease. The number of people suffering from inflammatory bowel diseases, especially Crohn's disease, has increased remarkably. Crohn's disease is assumed to be the result of a complex interplay between genetic susceptibility, environmental factors, and altered intestinal microbiota, leading to dysregulation of the innate and adaptive immune response. While many genetic variants have been identified to be associated with Crohn's disease, less is known about the influence of epigenetics in the pathogenesis of this disease. In this review, we provide an overview of current epigenetic studies in Crohn's disease. In particular, we enable a deeper insight into applied bioanalytical and computational tools, as well as a comprehensive update toward the cell-specific evaluation of DNA methylation and histone modifications.

scholarly journals The protective effect of curcumin on rats with DSS-induced ulcerative colitis and its mechanisms

2021 ◽  
Author(s):  
Jing Guo ◽  
Yan-yan Zhang ◽  
Mei Sun ◽  
Ling-fen Xu
Keyword(s):  
Ulcerative Colitis ◽  
Th17 Cells ◽  
Dextran Sulfate ◽  
Activity Index ◽  
Disease Activity Index ◽  
Treg Cells ◽  
Enzyme Linked Immunosorbent Assay ◽  
T Helper ◽  
T Helper 17 ◽  
Inflammatory Bowel

Abstract Aim This study aimed to explore effect of curcumin on inflammatory bowel disease (IBD) in rats and its mechanism.Methods: A dextran sulfate sodium (DSS)-induced ulcerative colitis (UC) rat model was established. The disease activity index (DAI) scores were calculated. The histopathological damage scores were determined by haematoxylin-eosin (H&E) staining. Regulatory T (Treg) cells and T helper 17 (Th17) cells in the spleen were analysed by flow cytometry. The levels of interleukin (IL)-10 and IL-17A were determined by enzyme-linked immunosorbent assay (ELISA). Results: Compared with the DSS model group, the curcumin group exhibited significantly reduced DAI scores and improvements in histopathological damage. The expression of CD4+IL-17+ Th17 cells was significantly lower and the expression of CD4+CD25+Foxp3+ Treg cells was significantly higher in the curcumin group than in the DSS group.Conclusion: Curcumin may be a new and effective treatment for IBD by regulating the balance of Treg/Th17 cells and the expression of IL-10 and IL-17A.

scholarly journals Th17 Cells and the IL-23/IL-17 Axis in the Pathogenesis of Periodontitis and Immune-Mediated Inflammatory Diseases

2019 ◽  
Vol 20 (14) ◽  
pp. 3394 ◽  
Author(s):  
Kübra Bunte ◽  
Thomas Beikler
Keyword(s):  
Innate Immunity ◽  
Th17 Cells ◽  
Therapeutic Potential ◽  
Tissue Injury ◽  
Current Knowledge ◽  
Inflammatory Diseases ◽  
Adaptive Immune System ◽  
Th2 Cells ◽  
Immune Mediated ◽  
Bowel Diseases

Innate immunity represents the semi-specific first line of defense and provides the initial host response to tissue injury, trauma, and pathogens. Innate immunity activates the adaptive immunity, and both act highly regulated together to establish and maintain tissue homeostasis. Any dysregulation of this interaction can result in chronic inflammation and autoimmunity and is thought to be a major underlying cause in the initiation and progression of highly prevalent immune-mediated inflammatory diseases (IMIDs) such as psoriasis, rheumatoid arthritis, inflammatory bowel diseases among others, and periodontitis. Th1 and Th2 cells of the adaptive immune system are the major players in the pathogenesis of IMIDs. In addition, Th17 cells, their key cytokine IL-17, and IL-23 seem to play pivotal roles. This review aims to provide an overview of the current knowledge about the differentiation of Th17 cells and the role of the IL-17/IL-23 axis in the pathogenesis of IMIDs. Moreover, it aims to review the association of these IMIDs with periodontitis and briefly discusses the therapeutic potential of agents that modulate the IL-17/IL-23 axis.

scholarly journals Role of Th17 Cells in the Pathogenesis of Human IBD

2014 ◽  
Vol 2014 ◽  
pp. 1-14 ◽  
Author(s):  
Julio Gálvez
Keyword(s):  
Th17 Cells ◽  
Current Knowledge ◽  
Th2 Cells ◽  
Th1 Cells ◽  
Inflammatory Conditions ◽  
Normal Microbiota ◽  
Bowel Diseases ◽  
Mucosal Homeostasis ◽  
Inflammatory Bowel

The gastrointestinal tract plays a central role in immune system, being able to mount efficient immune responses against pathogens, keeping the homeostasis of the human gut. However, conditions like Crohn’s disease (CD) or ulcerative colitis (UC), the main forms of inflammatory bowel diseases (IBD), are related to an excessive and uncontrolled immune response against normal microbiota, through the activation of CD4+ T helper (Th) cells. Classically, IBD was thought to be primarily mediated by Th1 cells in CD or Th2 cells in UC, but it is now known that Th17 cells and their related cytokines are crucial mediators in both conditions. Th17 cells massively infiltrate the inflamed intestine of IBD patients, where they produce interleukin- (IL-) 17A and other cytokines, triggering and amplifying the inflammatory process. However, these cells show functional plasticity, and they can be converted into either IFN-γ producing Th1 cells or regulatory T cells. This review will summarize the current knowledge regarding the regulation and functional role of Th17 cells in the gut. Deeper insights into their plasticity in inflammatory conditions will contribute to advancing our understanding of the mechanisms that regulate mucosal homeostasis and inflammation in the gut, promoting the design of novel therapeutic approaches for IBD.

scholarly journals Nanoparticle-based therapeutics of inflammatory bowel diseases: a narrative review of the current state and prospects

2020 ◽  
Vol 3 (4) ◽  
pp. 157-173
Author(s):  
Mei Yang ◽  
Yujie Zhang ◽  
Yana Ma ◽  
Xiangji Yan ◽  
Liuyun Gong ◽  
...  
Keyword(s):  
Inflammatory Bowel Diseases ◽  
Narrative Review ◽  
Current State ◽  
Bowel Diseases ◽  
Inflammatory Bowel

scholarly journals Clinicopathologic peculiarities of nonspecific ulcerative colitis and Crohn's disease

2021 ◽  
Author(s):  
S. D. Strelkova ◽  
G. Z. Murzina ◽  
D. A. Valetdinov ◽  
S. N. Styajkina ◽  
N. A. Kiryanov ◽  
...  
Keyword(s):  
Ulcerative Colitis ◽  
Crohn’S Disease ◽  
Crohn's Disease ◽  
Mucous Membrane ◽  
Intestinal Wall ◽  
Bowel Diseases ◽  
Working Age ◽  
Nonspecific Ulcerative Colitis ◽  
Inflammatory Bowel ◽  
Significant Disease

Currently, inflammatory bowel diseases (IBD), in nonspecific ulcerative colitis (NUC) and Crohn's disease (CD), are an extremely urgent problem. The incidence of both ulcerative colitis and Crohn's disease worldwide is increasing every year, and mainly among the working-age population, which makes inflammatory bowel disease (IBD) a socially significant disease. The clinical picture of IBD is diverse, which often makes it difficult to timely diagnose and prescribe adequate therapy and inevitably negatively affects the prognosis of diseases. Here are some of the characteristics of the NUC and CD. The histogram results of numerous studies indicate the following: in Crohn's disease (CD), the thickness of the intestinal wall is often significantly increased. In the mucous membrane, slit-like ulcerative defects are detected, in the bottom of which there are signs of inflammation in the form of infiltration of the bottom of the ulcers by leukocytes, lymphocytes, histiocytes. As for colitis, based on these clinical cases, it can be concluded that children and adolescents are characterized by a total lesion of the colon and the appearance of segmental forms. In adult patients, distal colitis, the so-called proctosigmoiditis, prevails. On examination, the mucous membrane was edematous, vividly hyperemic, edematous, with superficial erosions.

scholarly journals Neuroimmune and Acute Psychotic Disorders had an Overlapping Immune-Signature in Adolescents and Young Adults; A Case Series

2021 ◽  
pp. 17-24
Author(s):  
Jose Irazuzta ◽  
Nicolas Chiriboga Salazar
Keyword(s):  
Psychotic Disorders ◽  
Clinical Symptoms ◽  
Adaptive Immune Response ◽  
Case Series ◽  
Adaptive Immune System ◽  
Treg Cells ◽  
T Cell Subsets ◽  
Clinical Phase ◽  
Adaptive Immune ◽  
Cohort Group

A misguided auto-reactive injury is responsible for diverse types of central nervous system (CNS) conditions. We suspect that, in some of these conditions, the adaptive immune system have a common cellular immune pathogenesis, driven predominantly by T cells, despite variability on the phenotypical clinical presentation. Aim: the main goal of this study is to characterize a portion of the adaptive immune response (AIR) on patients presenting with clinical symptoms compatible with monophasic acute neuroimmune disorders (NID) including Psychotic Disorders (PD). Methodology: flow cytometry with deep immunophenotyping of T effector (Teff) and T regulatory (Treg) cells was performed on peripheral blood obtained during the acute clinical phase and compared it to the one from an age-matched cohort group [Co). Results: our preliminary findings point toward the presence of common “immunosignature” in individuals affected by NID or PD.  We also found a shared dysregulation of immune related neurogenes in NID and PD that were not present in normal cohorts. Conclusions: this preliminary report gives some insights into the underlying shared pathobiology. If we can improve our capacity for early accurate diagnosis and meaningful disease monitoring of pathogenic T cell subsets, we will both expedite disease detection and may serve as a guide the administration of effective immunotherapeutic agents.

scholarly journals Probiotics Can Cure Oral Aphthous-Like Ulcers in Inflammatory Bowel Disease Patients: A Review of the Literature and a Working Hypothesis

2019 ◽  
Vol 20 (20) ◽  
pp. 5026 ◽  
Author(s):  
Francesco Cappello ◽  
Francesca Rappa ◽  
Federica Canepa ◽  
Francesco Carini ◽  
Margherita Mazzola ◽  
...  
Keyword(s):  
Inflammatory Bowel Disease ◽  
Inflammatory Bowel Diseases ◽  
Inflammatory Process ◽  
Primary Role ◽  
Extraintestinal Manifestations ◽  
Review Of The Literature ◽  
Chronic Inflammatory Process ◽  
Intestinal Dysbiosis ◽  
Bowel Diseases ◽  
Inflammatory Bowel

Dysbiosis has been associated with the onset of several chronic autoimmune or inflammatory pathologies (e.g., inflammatory bowel diseases—IBD), because of its primary role in the establishment of a chronic inflammatory process leading to tissue damage. Inflammatory bowel diseases can even involve areas far away from the gut, such as the extraintestinal manifestations involving the oral cavity with the onset of aphthous-like ulcers (ALU). Studies carried out on animal models have shown that intestinal dysbiosis may be related to the development of autoimmune diseases, even if the mechanisms involved are not yet well known. The aim of this paper is to verify the hypothesis that in inflammatory bowel diseases patients, aphthous-like ulcers are the result of the concomitance of intestinal dysbiosis and other events, e.g., the microtraumas, occurring in the oral mucosa, and that ex adiuvantibus therapy with probiotics can be employed to modify the natural course of the aphthous-like ulcers.

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