Quantitative analysis of bacterial DNA from Mycobacteria spp., Bacteroides vulgatus , and Escherichia coli in tissue samples from patients with inflammatory bowel diseases

2002 ◽  
Vol 37 (7) ◽  
pp. 509-516 ◽  
Author(s):  
Hiroshi Fujita ◽  
Yoshinobu Eishi ◽  
Ikuo Ishige ◽  
Kiyoshi Saitoh ◽  
Touichirou Takizawa ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Quantitative Analysis ◽  
Inflammatory Bowel Diseases ◽  
Tissue Samples ◽  
Bacterial Dna ◽  
Bowel Diseases ◽  
Inflammatory Bowel

scholarly journals Expressions of Matrix Metalloproteinases (MMP-2, MMP-7, and MMP-9) and Their Inhibitors (TIMP-1, TIMP-2) in Inflammatory Bowel Diseases

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Katarzyna Jakubowska ◽  
Anna Pryczynicz ◽  
Piotr Iwanowicz ◽  
Andrzej Niewiński ◽  
Elżbieta Maciorkowska ◽  
...  
Keyword(s):  
Ulcerative Colitis ◽  
Crohn’S Disease ◽  
Crohn's Disease ◽  
Inflammatory Bowel Diseases ◽  
Inflammatory Infiltration ◽  
Tissue Samples ◽  
Metalloproteinase Inhibitors ◽  
Bowel Diseases ◽  
Tissue Changes ◽  
Inflammatory Bowel

Crohn’s disease (CD) and ulcerative colitis (UC) belong to a group of inflammatory bowel diseases (IBD). The aim of our study was to evaluate the expression of MMP-2, MMP-7, MMP-9, TIMP-1, and TIMP-2 in ulcerative colitis and Crohn’s disease. The study group comprised 34 patients with UC and 10 patients with CD. Evaluation of MMP-2, MMP-7, MMP-9, TIMP-1, and TIMP-2 expression in tissue samples was performed using immunohistochemistry. The overexpression of MMP-9 and TIMP-1 was dominant in both the glandular epithelium and inflammatory infiltration in UC patients. In contrast, in CD subjects the positive expression of MMP-2 and TIMP-1 was in glandular tubes while mainly MMP-7 and TIMP-2 expression was in inflammatory infiltration. Metalloproteinases’ expression was associated with the presence of erosions, architectural tissue changes, and inflammatory infiltration in the lamina propria of UC patients. The expression of metalloproteinase inhibitors correlated with the presence of eosinophils and neutrophils in UC and granulomas in CD patients. Our studies indicate that the overexpression of metalloproteinases and weaker expression of their inhibitors may determine the development of IBD. It appears that MMP-2, MMP-7, and MMP-9 may be a potential therapeutic target and the use of their inhibitors may significantly reduce UC progression.

scholarly journals Escherichia coli isolates from inflammatory bowel diseases patients survive in macrophages and activate NLRP3 inflammasome

2014 ◽  
Vol 304 (3-4) ◽  
pp. 384-392 ◽  
Author(s):  
Marjorie De la Fuente ◽  
Luigi Franchi ◽  
Daniela Araya ◽  
David Díaz-Jiménez ◽  
Mauricio Olivares ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Inflammatory Bowel Diseases ◽  
Nlrp3 Inflammasome ◽  
Bowel Diseases ◽  
Inflammatory Bowel

scholarly journals The Prevalence of Adherent-Invasive Escherichia coli and Its Association With Inflammatory Bowel Diseases: A Systematic Review and Meta-Analysis

2021 ◽  
Vol 8 ◽  
Author(s):  
Razie Kamali Dolatabadi ◽  
Awat Feizi ◽  
Mehrdad Halaji ◽  
Hossein Fazeli ◽  
Peyman Adibi
Keyword(s):  
Escherichia Coli ◽  
Systematic Review ◽  
Inflammatory Bowel Diseases ◽  
Meta Analysis ◽  
Control Group ◽  
Pooled Prevalence ◽  
Bowel Diseases ◽  
Phylogenetic Grouping ◽  
Inflammatory Bowel ◽  
And Control

Inflammatory bowel diseases (IBD), including Crohn's disease (CD) and ulcerative colitis (UC), are known as chronic gastrointestinal inflammatory disorders. The present systematic review and meta analysis was conducted to estimate the prevalence of adherent-invasive Escherichia coli (AIEC) isolates and their phylogenetic grouping among IBD patients compared with the controls. A systematic literature search was conducted among published papers by international authors until April 30, 2020 in Web of Science, Scopus, EMBASE, and PubMed databases. The pooled prevalence of AIEC isolates and their phylogenetic grouping among IBD patients as well as in controls was estimated using fixed or random effects models. Furthermore, for estimating the association of colonization by AIEC with IBD, odds ratio along with 95% confidence interval was reported. A total of 205 articles retrieved by the initial search of databases, 13 case–control studies met the eligibility criteria for inclusion in the meta analysis. There were 465 IBD cases (348 CD and 117 UC) and 307 controls. The pooled prevalence of AIEC isolates were 28% (95% CI: 18–39%), 29% (95% CI: 20–40%), 13% (95% CI: 1–30%), and 9% (95% CI: 3–19%), respectively among IBD, CD, UC, and control group, respectively. Our results revealed that the most frequent AIEC phylogroup in the IBD, CD, and control groups was B2. Fixed-effects meta analysis showed that colonization of AIEC is significantly associated with IBD (OR: 2.93; 95% CI: 1.90–4.52; P < 0.001) and CD (OR: 3.07; 95% CI: 1.99–4.74; P < 0.001), but not with UC (OR: 2.29; 95% CI: 0.81–6.51; P = 0.11). In summary, this meta analysis revealed that colonization by AIEC is more frequent in IBD and is associated with IBD (CD and UC). Our results suggested that the affects of IBD in patients colonized with the AIEC pathovar is not random, it is in fact a specific disease-related pathovar.

scholarly journals Sex- and Age-Related Estrogen Signaling Alteration in Inflammatory Bowel Diseases: Modulatory Role of Estrogen Receptors

2019 ◽  
Vol 20 (13) ◽  
pp. 3175 ◽  
Author(s):  
Damian Jacenik ◽  
Adam I. Cygankiewicz ◽  
Anna Mokrowiecka ◽  
Ewa Małecka-Panas ◽  
Jakub Fichna ◽  
...  
Keyword(s):  
Estrogen Receptor ◽  
Estrogen Receptors ◽  
Inflammatory Bowel Diseases ◽  
Protein Level ◽  
Estrogen Signaling ◽  
Dependent Manner ◽  
Tissue Samples ◽  
Age Related ◽  
Bowel Diseases ◽  
Inflammatory Bowel

The pathogenesis of inflammatory bowel diseases (IBD) seems to be associated with alterations of immunoregulation. Several lines of evidence suggest that estrogens play a role in the modulation of immune responses and may be related to the etiology of IBD. The purpose of this work was to examine the involvement of G protein-coupled estrogen receptor (GPER), estrogen receptor α (ERα), estrogen receptor β (ERβ) and ERα spliced variants ERα36 and ERα46 in Crohn’s disease (CD) and ulcerative colitis (UC). The studied group included 73 patients with IBD and 31 sex and age-related controls. No differences in serum levels of 17β-estradiol nor of CYP1A1 and SULT1E1 enzymes involved in estrogen catabolism were stated. The expression pattern of estrogen receptors in tissue samples was quantified using real-time PCR and Western blotting. Statistically significant up-regulation of GPER and ERα in both CD and UC as well as down-regulation of ERβ in CD patients was found. However, differences in the expression of estrogen receptors in CD and UC have been identified, depending on the sex and age of patients. In men, up-regulation of GPER, ERα and ERα46 expression was shown in CD and UC patients. In women under 50 years of age, GPER protein level increased in UC whereas ERβ expression tended to decrease in CD and UC patients. In turn, in women over 50 the protein level of ERα increased in UC while ERβ expression decreased in CD patients. Dysregulation of estrogen receptors in the intestinal mucosa of patients with CD and UC indicates that estrogen signaling may play a role in the local immune response and maintain epithelial homeostasis in a gender- and age-dependent manner.

High prevalence of aggregative adherent Escherichia coli strains in the mucosa-associated microbiota of patients with inflammatory bowel diseases

2011 ◽  
Vol 301 (6) ◽  
pp. 475-479 ◽  
Author(s):  
Cristiane M. Thomazini ◽  
Danielle A.G. Samegima ◽  
Maria A.M. Rodrigues ◽  
Carlos R. Victoria ◽  
Josias Rodrigues
Keyword(s):  
Escherichia Coli ◽  
Inflammatory Bowel Diseases ◽  
High Prevalence ◽  
Bowel Diseases ◽  
Inflammatory Bowel

scholarly journals A nadA mutation confers nicotinic acid auxotrophy in pro-carcinogenic intestinal Escherichia coli NC101

2021 ◽  
Author(s):  
Lacey R. Lopez ◽  
Cassandra J. Barlogio ◽  
Christopher A. Broberg ◽  
Jeremy Wang ◽  
Janelle C. Arthur
Keyword(s):  
Colorectal Cancer ◽  
Escherichia Coli ◽  
Nicotinic Acid ◽  
Intestinal Microbiota ◽  
Inflammatory Bowel Diseases ◽  
E Coli ◽  
Functional Studies ◽  
Bowel Diseases ◽  
Inflammatory Bowel

AbstractInflammatory bowel diseases and inflammation-associated colorectal cancer are linked to blooms of adherent-invasive Escherichia coli (AIEC) in the intestinal microbiota. AIEC are functionally defined by their ability to adhere/invade epithelial cells and survive/replicate within macrophages. Changes in micronutrient availability can alter AIEC physiology and interactions with host cells. Thus, culturing AIEC for mechanistic investigations often involves precise nutrient formulation. We observed that the pro-inflammatory and pro-carcinogenic AIEC strain NC101 failed to grow in minimal media (MM). We hypothesized that NC101 was unable to synthesize a vital micronutrient normally found in the host gut. Through nutrient supplementation studies, we identified that NC101 is a nicotinic acid (NA) auxotroph. NA auxotrophy was not observed in the other non-toxigenic E. coli or AIEC strains we tested. Sequencing revealed NC101 has a missense mutation in nadA, a gene encoding quinolinate synthase A that is important for de novo NAD biosynthesis. Correcting the identified nadA point mutation restored NC101 prototrophy without impacting AIEC function, including motility and AIEC-defining survival in macrophages. Our findings, along with the generation of a prototrophic NC101 strain, will greatly enhance the ability to perform in vitro functional studies that are needed for mechanistic investigations on the role of intestinal E. coli in digestive disease.ImportanceInflammatory bowel diseases (IBD) and colorectal cancer (CRC) are significant global health concerns that are influenced by gut resident microbes, like adherent-invasive Escherichia coli (AIEC). Nutrient availability influences specialized metabolite production, AIEC-defining functional attributes, and AIEC:host interactions. NC101 is a pro-inflammatory and pro-carcinogenic AIEC strain commonly used for studies on IBD and CRC. We identified that NC101 growth in vitro requires a micronutrient found in the host gut. By correcting an identified mutation, we generated an NC101 strain that no longer has micronutrient restrictions. Our findings will facilitate future research that necessitates precise nutrient manipulation, enhancing AIEC functional studies and investigations on other auxotrophic intestinal microbiota members. Broadly, this will improve the study of bacterial:host interactions impacting health and disease.

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