Fecal samples and rectal swabs adequately reflect the human colonic luminal microbiota.

The appropriateness of the fecal microbiota to adequately reflect the gut microbiota composition from more difficult to access luminal content at different colonic locations has been debated. Here, in a healthy population, luminal samples were collected from terminal ileum to rectum using an unique sampling technique without the need of prior bowel cleansing/preparation. Rectal swabs were collected immediately prior colonoscopy by an experienced physician, and fecal samples were collected at home by the participants themselves.

Analysis of the fermentation kinetics and gut microbiota modulatory effect of dried chicory root reveals the impact of the plant-cell matrix rationalizing its conversion in the distal colon.

The cell matrix of plant foods has received little attention in prebiotic fiber research. We aimed to understand the impact of the plant cell matrix in dried chicory root on its breakdown in the human gut to explain its reported beneficial effects on gut and metabolic health. We applied digestion and fermentation models together with an gut barrier integrity model.

Reduces Peritonitis and Improves Intestinal Tissue Wound Healing after a Colonic Transmural Defect by a MyD88-Dependent Mechanism.

Anastomotic leakage is a major complication following colorectal surgery leading to peritonitis, complications, and mortality. has shown beneficial effects on the gut barrier function. Whether reduces peritonitis and mortality during colonic leakage is unknown.

Faecalibacterium prausnitzii increases following fecal microbiota transplantation in recurrent Clostridioides difficile infection.

Objective: Fecal microbiota transplantation (FMT) is a highly effective treatment for Clostridioides difficile infection (CDI). However, the fecal transplant's causal components translating into clearance of the CDI are yet to be identified. The commensal bacteria Faecalibacterium prausnitzii may be of great interest in this context, since it is one of the most common species of the healthy gut microbiota and produces metabolites with anti-inflammatory properties.

Butyrate Rescues Oxidative Stress-Induced Transport Deficits of Tryptophan: Potential Implication in Affective or Gut-Brain Axis Disorders.

Introduction: Butyrate is a short-chain fatty acid metabolite produced by microbiota in the colon. With its antioxidant properties, butyrate has also been shown to alter the neurological functions in affective disorder models, suggesting it as a key mediator in gut-brain interactions.

Objective: Here, we evaluated the negative effect of oxidative stress on the transport of the serotonin precursor tryptophan as present in affective disorders.

Differences in Gut Microbiome Composition between Senior Orienteering Athletes and Community-Dwelling Older Adults.

Background: Gastrointestinal (GI) health is an important aspect of general health. Gastrointestinal symptoms are of specific importance for the elderly, an increasing group globally. Hence, promoting the elderly's health and especially gastrointestinal health is important.

Impact of Proinflammatory Cytokines on the Virulence of Uropathogenic .

The effect of a urinary tract infection on the host is a well-studied research field. However, how the host immune response affects uropathogenic (CFT073) virulence is less studied. The aim of the present study was to investigate the impact of proinflammatory cytokine exposure on the virulence of uropathogenic We found that all tested proinflammatory cytokines (TNF-α, IL-1β, IL-6, IL-8 and IFN-γ) induced an increased CFT073 growth.

Alterations in the relative abundance of correlate with changes in fecal calprotectin in patients with ileal Crohn's disease: a longitudinal study.

Crohn's disease is characterized by a gut dysbiosis with decreased abundance of butyrate producers such as . Although secretes anti-inflammatory molecules, few studies have addressed the importance of in a longitudinal setting. We aimed to examine the relationship between temporal profiles of , the group, overall butyrate production, and inflammatory activity.

Qualitative modelling of the interplay of inflammatory status and butyrate in the human gut: a hypotheses about robust bi-stability.

Background: Gut microbiota interacts with the human gut in multiple ways. Microbiota composition is altered in inflamed gut conditions. Likewise, certain microbial fermentation products as well as the lipopolysaccharides of the outer membrane are examples of microbial products with opposing influences on gut epithelium inflammation status.

Identification and management of prediabetes: results of the Latin America Strategic Prediabetes Meeting.

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Degree of colitis correlates with microbial composition and cytokine responses in colon and caecum of Gαi2-deficient mice.

An altered immune response and gut microbiota have been associated with the pathology of inflammatory bowel diseases (IBDs). However, there is limited knowledge of how inflammation is associated with changes in the microbiota. We studied the microbiota in the intestine and faeces as well as the cytokine gene expressions in caecum and colon of a mouse model (Gαi2(-/-)) of colitis, and analysed them in relation to the degrees of inflammation in the colon.

Cytokine Response after Stimulation with Key Commensal Bacteria Differ in Post-Infectious Irritable Bowel Syndrome (PI-IBS) Patients Compared to Healthy Controls.

Background: Microbial dysbiosis and prolonged immune activation resulting in low-grade inflammation and intestinal barrier dysfunction have been suggested to be underlying causes of post-infectious irritable bowel syndrome (PI-IBS). The aim of this study was to evaluate the difference in cytokine response between mucosal specimens of PI-IBS patients and healthy controls (HC) after ex vivo stimulation with key anaerobic bacteria.

Methods: Colonic biopsies from 11 PI-IBS patients and 10 HC were stimulated ex vivo with the commensal bacteria Bacteroides ovatus, Ruminococcus gnavus, Akkermansia muciniphila, Subdoligranulum variabile and Eubacterium limosum, respectively.

Aberrant mucosal lymphocyte number and subsets in the colon of post-infectious irritable bowel syndrome patients.

Background: Irritable bowel syndrome (IBS) is characterized by chronic abdominal symptoms such as pain, discomfort, and altered bowel habits. A subset of IBS patients, denoted as post-infectious IBS (PI-IBS) patients, develop symptoms after an enteric infection. Distinct abnormalities in the gut mucosa, including mucosal inflammation, have been proposed to contribute to or be the cause of PI-IBS.

Comparison between terminal-restriction fragment length polymorphism (T-RFLP) and quantitative culture for analysis of infants' gut microbiota.

The infantile intestinal microbiota is a major stimulus for immune maturation. Both culture and DNA-based methods can be used for microbiota characterization, but few studies have systematically compared their performance for analysis of the gut microbiota. Here, we examined fecal samples obtained on six occasions between one week and 12 months of age from six vaginally delivered infants.

Interplay between T(h)1 and T(h)17 effector T-cell pathways in the pathogenesis of spontaneous colitis and colon cancer in the Gαi2-deficient mouse.

Gαi2-deficient mice spontaneously develop colitis. Using xMAP technology and RT-PCR, we investigated cytokine/chemokine profiles during histologically defined phases of disease: (i) no/mild, (ii) moderate, (iii) severe colitis without dysplasia/cancer and (iv) severe colitis with dysplasia/cancer, compared with age-matched wild-type (WT) littermates. Colonic dysplasia was observed in 4/11 mice and cancer in 1/11 mice with severe colitis.