Background Several studies have highlighted the role of host–microbiome interactions in the pathogenesis of inflammatory bowel disease (IBD), resulting in an increasing amount of data mainly focusing on Western patients. Because of the increasing prevalence of IBD in newly industrialized countries such as those in Asia, the Middle East, and South America, there is mounting interest in elucidating the gut microbiota of these populations. We present a comprehensive analysis of several IBD-related biomarkers and gut microbiota profiles and functions of a unique population of patients with IBD and healthy patients from Kazan (Republic of Tatarstan, Russia). Methods Blood and fecal IBD biomarkers, serum cytokines, and fecal short-chain fatty acid (SCFA) content were profiled. Finally, fecal microbiota composition was analyzed by 16S and whole-genome shotgun sequencing. Results Fecal microbiota whole-genome sequencing confirmed the presence of classic IBD dysbiotic features at the phylum level, with increased abundance of Proteobacteria, Actinobacteria, and Fusobacteria and decreased abundance of Firmicutes, Bacteroidetes, and Verrucomicrobia. At the genus level, the abundance of both fermentative (SCFA-producing and hydrogen (H2)-releasing) and hydrogenotrophic (H2-consuming) microbes was affected in patients with IBD. This imbalance was confirmed by the decreased abundance of SCFA species in the feces of patients with IBD and the change in anaerobic index, which mirrors the redox status of the intestine. Conclusions Our analyses highlighted how IBD-related dysbiotic microbiota—which are generally mainly linked to SCFA imbalance—may affect other important metabolic pathways, such as H2 metabolism, that are critical for host physiology and disease development.
The results of recent studies indicate a significant role of gut microbiota in the pathogenesis of inflammatory bowel diseases (IBD). The aim of the study was to study the taxonomic and functional composition of the gut microbiota in ulcerative colitis (UC) and Crohn's disease (CD) patients to identify key markers of dysbiosis in IBD. Materials and methods. Fecal samples obtained from 95 IBD patients (78 UC and 17 CD) as well as 96 healthy volunteers were used for whole-genome sequencing carried out on the SOLiD 5500 W platform. Taxonomic profiling was performed by aligning the reeds, not maped on hg19, on MetaPhlAn2 reference database. Reeds were mapped using the HUNAnN2 algorithm to the ChocoPhlAn database to assess the representation of microbial metabolic pathways. Short-chain fatty acids (SCFA) level were measured in fecal samples by gas-liquid chromatographic analysis. Results and discussion. Changes in IBD patients gut microbiota were characterized by an increase in the representation of Proteobacteria and Bacteroidetes phyla bacteria and decrease in the number of Firmicutes phylum bacteria and Euryarchaeota phylum archaea; a decrease in the alpha-diversity index, relative representation of butyrate-producing, hydrogen-utilizing bacteria, and Methanobrevibacter smithii; increase in the relative representation of Ruminococcus gnavus in UC and CD patients and Akkermansia muciniphila in CD patients. Reduction of Butyryl-CoA: acetate CoA transferase gene relative representation in CD patients, decrease of absolute content of SCFA total number as well as particular SCFAs and main SCFAs ratio in IBD patients may indicate inhibition of functional activity and number of anaerobic microflora and/or an change in SCFA utilization by colonocytes. Conclusion: the revealed changes can be considered as typical signs of dysbiosis in IBD patients and can be used as potential targets for IBD patients personalized treatment development.
Low patient compliance due to the development of adverse events in the form of antibiotic-associated diarrhea (AAD) is considered as the main reason for the failure of the eradication of optimized anti-Helicobacter therapy regimens. A key mechanism for the development of AAD is to reduce the number and species diversity of bacteria that form butyric acid. Aim. The purpose of this study was to study the comparative effect on the clinical effectiveness of eradication therapy (ET) of Helicobacter pylori infection and metabolic changes in the colon microbiota of additional inclusion in the optimized treatment regimen of the combined prebiotic Zakofalk (inulin + butyrate) with probiotics (lacto- and bifidobacteria in an amount of at least 1017 СFU). Materials and methods. 120 patients with chronic gastroduodenal diseases and infected H. pylori were еxamined. A comparative analysis of the effect of a combined prebiotic and lacto-bifid-containing probiotics on improving the effectiveness of the optimized ET scheme and improving its tolerability, as well as on the quantitative and qualitative content of short-chain fatty acids (SFA) in feces. The success of eradication was controlled by a 13C urease breath test. Results. According to the results of the study in randomized groups of patients, an excellent percentage of eradication (95%) was achieved in patients who performed ET with the addition of the prebiotic Zakofalk. In the same group of patients, there was an increase in the absolute content of SFA and a significant increase in the concentration of butyric acid. In the group of patients who received ET with the addition of probiotics, an acceptable level of eradication was achieved (85.7%), but no changes in SFA were found indicating an increase in the number or activity of the butyrate-producing flora. Patients who performed ET without the addition of pre-probiotics did not achieve the target percentage of successful eradication (83.3%), and a significant quantitative decrease in SFA was found with a significant decrease in the proportion of butyric acid. Conclusion. The inclusion of Zakofalk in the ET scheme, in comparison with probiotics, significantly increases the probability of successful eradication, more effectively restores the metabolic potential of the microbiota, and prevents the development of AAD.
Background. The novel coronavirus infection COVID-19 can be manifested by damage to the organs of the gastrointestinal tract (GIT). Damage to the gastrointestinal tract by the SARS-CoV-2 virus leads to a violation of the microbial-tissue complex of the mucous membrane of the digestive tract. A common gastroenterological manifestation of COVID-19 is diarrhea. Aim. Study of the clinical features of gastroenterological disorders and the possibility of optimizing the treatment of diarrheal syndrome in patients with COVID-19 with a mild form of viral infection. Materials and methods. The observation group consisted of 230 patients with mild COVID-19: K-group (n=115) with respiratory symptoms, I group (n=115) with gastrointestinal manifestations in combination and without signs of respiratory damage. In order to compare the effectiveness of treatment of diarrheal syndrome, patients of group I are randomized into 2 subgroups: Ia (n=58) prebiotic treatment (Zacofalk) and Ib (n=57) enterosorbents. Results. The development of gastrointestinal symptoms with SARS-CoV-2 infection is significantly more often noted in comorbid patients (67%). Gastrointestinal symptoms were dominated by diarrhea (93.9%) and flatulence (76.5%), in 1/3 of patients they were the first manifestos of infection. It was established that in 98.4% of patients of group I (against 42.6% of the K-group) signs of infectious intoxication were detected. In patients with gastrointestinal lesions, an elongation of the febrile period by 91.5 days was noted, a later (6 days) verification of the viral etiology of the disease. It was found that in patients of group I, the regression of clinical symptoms, the duration of viral disease, the dynamics of antibody formation, the prognosis for the development of IBS-like disorders in the post-infectious period depended on the treatment. In patients taking (Zacofalk), these indicators were significantly better. Conclusion. In mild cases, to reduce the severity of viral intestinal damage, for effective relief of intestinal symptoms, to reduce the risk of IBS-like symptoms, it is advisable to prescribe (Zacofalk) in an initial dose of 3 tablets per day.
Aim of investigation: to assess the effectiveness and tolerance of dietary supplements (BAA) STIM and STIM LaxMaterials and methods: The analysis of the treatment of 73 patients who were divided into 2 groups. Group 1-32 patients with functional constipation (8 men and 24 women; mean age — 45.7 ± 12.4 years), Group 2-41 patients with functional diarrhea (19 men and 22 women; mean age — 41.0 ± 15,8 years). The study of clinical symptoms was carried out according to the data of an individual diary, using specialized questionnaires with a scoring of symptoms before and after the course of treatment, before and after treatment, the result of the carbolene test, the content of short-chain fatty acids in the feces was assessed. Tolerability was assessed by recording side effects and adverse events.Monotherapy was carried out with STIM LAX for patients with functional constipation at a dose of 1 tablet 3 times a day for 30 days. STIM for patients with functional diarrhea was prescribed in a dose of 2 tablets 3 times a day for 30 days.Results of the study: The results of the study showed that FC therapy with StimLax effectively reduces the frequency and intensity of symptoms such as difficulty / pain, discomfort during defecation, feeling of incomplete emptying, abdominal pain, time spent in the toilet and the number of failed bowel movements. We observed the normalization of transit time according to the carbolene test and an increase in stool frequency up to 5 times a week.Treatment of patients with FD with Stim led to a significant decrease in the intensity of abdominal pain, rumbling, flatulence, stool frequency, an increase in the time of the carbolene test and the normalization of its consistency.Adverse events were observed in 8 (10.9%) patients (4 patients with FD and 4 patients with FD). On the 3-5th day of treatment, there was an increase in flatulence, rumbling in the abdomen. A temporary decrease in the dose of the drug to 1-2 tablets per day removed these phenomena and the symptoms that appeared were resolved within 1-3 days. After that, the dose of the drug was gradually increased to the initial (effective), which the patients tolerated normally.Conclusions: The results of this study indicate high clinical efficacy and good tolerability of treatment with drugs StimLax and Stim in patients with FC and FD. In some cases, it is necessary to titrate the dose of the drug (downward), but this is not accompanied by a decrease in the effectiveness of therapy. The use of these drugs with metaprebiotic properties helps to modify the microbiota of patients with functional bowel diseases. With constipation, the number and activity of both lactic acid flora and microorganisms that produce butyric acid are stimulated; in addition, calcium lactate is an additional source of butyric acid due to metabolism. With diarrhea, along with the stimulation of the number and activity of the lactic acid flora, there is an improvement in the utilization of butyrate by intestinal cells.
The frequency of intestinal microbiota disorders in patients with chronic pancreatitis (CP) is extremely high and can reach 97%. The bacterial overgrowth syndrome (SIBO) and the syndrome of increased epithelial permeability (SPEP), developing against the background of excretory insufficiency of the pancreas, affect the severity of the clinical picture of the disease, reduce the effectiveness of enzyme replacement therapy and generally contribute to the further progression of CP.The article presents a modern view on the mechanisms of the formation of SIBO and SPEP in CP. There is their aggravating effect on the course of the disease and the aggravation of disorders of the digestive and absorption processes that accompany them is shown and analyzed in the article.For decontamination of conditionally pathogenic and pathogenic flora, increasing the number and metabolic activity of indigenous microflora in patients with CP, the use of a non-absorbable broad-spectrum antibiotic rifaximin is effective. In order to restore the barrier function of the gastrointestinal mucosa, the drug of choice is rebamipid, a universal cytoprotector that affects all three levels of epithelial tissue protection (preepithelial, epithelial and subepithelial).Conclusion. CP is characterized by the complexity of its etiology and pathogenesis. Bacterial factors, in particular, SIBO and SPEP, play an essential role in the development of inflammatory changes in the pancreas. In the complex therapy of CP, it is advisable to take measures aimed at correcting disorders of the intestinal microbiota.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.