View clinical trials related to Microbiome.
Filter by:Our primary aim is to investigate the use of microbial profile from the bladder and the feces of NMIBC patients as a predicting tool for therapy response prior to BCG administration. Our second aim is to collect additional samples (blood, instrumented urine, bladder tissue, feces) to establish a local biobank for future microbiome projects.
Vaccination is the best way to mitigate the coronavirus disease 2019 (COVID-19) pandemic, but the vaccine immunogenicity may be quite variable from person to person. There is increasing evidence suggesting that the gut microbiome is a major determinant of vaccine immunogenicity. Thus, the investigators investigated the relationship between gut microbiota and humoral immune response after COVID-19 vaccination.
Healsea® chronic is CE marked medical device indicated in adults for the treatment of nasal symptoms of chronic rhinosinusitis. This is an hypertonic seawater-based nasal spray supplemented with natural Symbiofilm® extract (0.2%) isolated from marine bacteria. In vitro, Symbiofilm® inhibits at early stage biofilm formation from bacteria found to be more prevalent and abundant in CRS patients (e.g. Staphylococcus aureus, Pseudomonas aeruginosa). This exploratory study is designed with aim to determine if the antibiofilm properties of Symbiofilm® may modify sino-nasal microbiota, impacting α and/ or β diversities.
Background: Significant sex differences exist in regard to alcohol use disorder (AUD) and alcoholic liver disease (ALD). To date, no studies have examined the brain-gut-microbiome (BGM) axis (which is the relationship between the gut, brain, and the bacteria within the gut) and sex-differences in AUD and ALD. Aims: 1) Demonstrate baseline sex differences in the microbiome and metatranscriptome of AUD and ALD and correlate those differences to severity, 2) determine if these baseline sex differences predicts abstinence or ALD related outcomes, and 3) show how altering the microbiome can decrease the severity of AUD and ALD in a sexdependent manner. Hypothesis: Our project is aimed to explore the hypothesis that sex-related differences of the BGM axis in AUD and ALD explains the variation in patient severity and outcome by sex, and that alterations of the BGM axis can decrease the severity of AUD and ALD in a sex-dependent manner. Methods: A pilot randomized placebo (VSL#3 vs placebo) control trial will be performed in patients with AUD and ALD for 6 months. Questionnaire data, clinical labs, serum, and feces for shotgun metagenomics will be collected at baseline, 3-months, and 6-months. Anticipated Results: Patients with severe AUD/ALD will have more microbes and microbial genes associated with inflammation. These differences will predict outcomes at 6-months and that changes of this baseline microbiome with VSL#3 will lead to more positive outcomes than placebo, with men having greater benefit from VSL#3 than women. Implications and Future Studies: The discovery of the mechanisms underlying sex-related differences in AUD/ALD is needed for the development of personalized recommendations for prevention and treatment in men and women
This is a prospective, two-centre, double-blind, parallel-arm, randomised, placebo-controlled trial evaluating the impact of FMT on patients with active Crohn's disease.
The overlap between chronic obstructive pulmonary disease (COPD) and bronchiectasis is a neglected area of research, and it is not covered by guidelines for clinical practice. COPD and bronchiectasis share common symptoms of cough with sputum production and susceptibility to recurrent exacerbations driven by new or persistent infection. Physiological criteria for the diagnosis of COPD and structural criteria for the diagnosis of bronchiectasis create the possibility for individual patients to fulfil both, resulting conceptually in either co-diagnosis or an overlap syndrome between the two conditions. The prevalence of this overlap will vary depending on the respective prevalence of COPD and bronchiectasis in the population under consideration. A recent study of 201 COPD patients with airway wall abnormalities typical of bronchiectasis confirmed an association with exacerbations and was predictive of mortality over 48 months. A further, single-centre study demonstrated a near three-fold increased mortality rate, with patients with bronchiectasis and associated COPD having a 5-year mortality of 55%, compared with 20% in those with bronchiectasis without COPD. Airflow obstruction is perhaps best considered one marker of disease severity in bronchiectasis. Disease-associated exacerbations have a major effect on patient healthcare costs as well as quality of life due to increased lung damage and mortality risk. Microorganisms such as Pseudomonas aeruginosa and, to a lesser extent, other Gram-negative and Gram-positive microorganisms identified in culture, have been linked to disease progression, poor clinical outcomes in bronchiectasis and driving airway neutrophil-mediated inflammation. The microbiome has the potential to provide valuable information regarding disease phenotype/endotype, treatment responses and targets for future therapy.
Lung cancer is the malignant tumor with the highest incidence, accounting for the first cause of tumor death. At present, smoking, occupational and environmental exposure, air pollution and genetic factors are considered to be related to the incidence of lung cancer. However, the occurrence of cancer is related to many factors. In recent years, researches have found that microorganisms are closely related to various human cancers. It is reported that 20% of cancers are related to multiple microorganisms, such as EB virus and nasopharyngeal cancer, HBV and liver cancer. Understanding the correlation between pathogenic microorganisms and cancer is of great significance for the pathogenesis, prevention and treatment of cancer. Basic researches have found that mycotoxins are related to animal models of lung cancer, but have not been confirmed in clinical and human. With the help of microbial metagenome Next Generation Sequencing (mNGS) and bioinformatics analysis, the investigators initially found in clinical practice that some patients had fungal infections such as fungi in lung cancer tissues. This study intends to collect clinical cases (cross-sectional studies) to explore the correlation between the pathogenic microbiome and lung cancer, in order to confirm that the occurrence of lung cancer is closely related to microorganisms such as fungi.
Neutrophilic asthma (NA) is the least known severe asthma phenotype. It is associated with more exacerbations, worse control and impaired lung function. One of its possible etiologies is bronchial infections. The study of bronchial microbiology and its relationship with exacerbations is a new line of research. Objectives: 1) To analyze bronchial microbiome in patients with AN and non-neutrophilic (ANN), with frequent exacerbations and without exacerbations. 2) To relate the presence of bronchial infections with differences in the microbiome. 3) Correlate the characteristics of the microbiome with other evidence used in exacerbations. Methods: Prospective study involving 40 non-smoking asthmatics without bronchiectasis (20 with AN and 20 with ANN). Of these, 10 in each group will have frequent exacerbations (>2 rounds of systemic steroids in the last year, of >3 days each) and 10 non- frequent exacerbations. AN will be defined as >65% neutrophils in stable phase sputum. All patients will have two stable visits in which clinical variables, asthma control, lung function and induced sputum samples will be collected (for analysis of bronchial inflammatory cell count and for the study of the microbiome by 16 subunit rRNA). Specific Immunoglobulin A (IgA) for Chlamydia Pneumoniae will be determined. In exacerbations, sputum samples will be collected for culture and nasopharyngeal smears for the study of major respiratory viruses and bacteria by multiple polymerase chain reaction.
How to reduce the rapid decline of lung function in patients with AECOPD is a clinically urgent problem to be solved. Studies have suggested that there is a bacterial flora imbalance in the lower respiratory tract of COPD patients. To explore the relationship between microbiology and host immunity is a hot topic in the field of COPD. The investigators use NGS (next generation sequencing) technology to fully explore the specific molecular mechanism of the lower respiratory tract microbiome in patients with COPD by regulating the transcriptional activities of NF-κB and PPARγ in alveolar macrophages, resulting in pulmonary parenchymal remodeling and decreased lung function. In this study, a prospective cohort study will be used to evaluate the effect of the lower respiratory tract microbiome on lung tissue (alveolar space and pulmonary vascular) remodeling and pulmonary function decline in patients with AECOPD.
Knowledge about the correlations between the composition of the gut microbiome and a wide range of diseases has substantially increased in recent years. Nonetheless, there is no reference set of information about the microbiome in Poland. The development of such a reference will allow polish scientists conducting research in the field of interaction between gut flora components and such characteristics as lifestyle, certain diseases or patient's responses for treatment. Following the example of such countries as the United States, investigators propose to build a unique set of scientific processed information describing the variability of the polish population microbiome (Polish Microbiome Map). The investigators will provide a reliable dataset that will characterize the gut microbiomes and their diversity in the polish population. Additionally, thanks to the creation of the standard protocol for microbiome data collection the research conducted by the MMP users will be comparable with the information deposited in MMP.