Active clinical trials for "Inflammatory Bowel Diseases"

To elucidate the longitudinal development of intestinal microbiota in patients with IL10RA deficiency after hematopoietic stem cell transplantation (HSCT). The investigators planned to collect fecal samples from IL10RA-deficient patients who received HSCT. Samples were collected more than once every three days after engraftment in lamina flow ward and at least once a week before discharge. Microbial DNA was extracted from the fecal samples. And all analysis was based on the next generation sequencing data.

Fatty liver is known to be one of the most frequent liver pathologies in IBD patients (35-40%). Despite this fact, there are only few publications that evaluated the prevalence of fatty liver in IBD patients. Moreover, the pathogenesis of this phenomenon in IBD has not been widely investigated. The paradox of lean patients and fatty liver can be explained by high use of steroids, by rapid weight loss, and by the abundance of TNFα cytokine in IBD patients that causes insulin resistance. The aim of the study: To evaluate the frequency of fatty liver in a cohort of IBD patients and to learn its risk factors. Methods: One hundred consecutive IBD patients treated at the Tel Aviv Sourasky Medical Center will be recruited. Patients will fill up a questionnaire regarding their disease, demographic data, other co-morbidities and medications and risk factors for metabolic syndrome. Each patient will undergo blood examinations in order to assess inflammation, and metabolic status. Fatty liver will be assessed by liver ultra-sonography.

Registration of patients referred for colon investigation by barium enema, CT colonography and colonoscopy in two hospitals and one radiology centre in Telemark, Norway, for a period of minimum six months. Indications, delay and results of procedure will be recorded.Hypothesis: Choice of procedure for colon investigation is not based solely on clinical indication, but factors like delay, patient preference, lack of knowledge about the the procedures by the referring physician may have a decisive influence. The study will also analyse the correlation between patients symptoms, clinical findings and laboratory results and major pathology findings by colon investigation. Further, delay from patient´s first symptoms to finally diagnosis by colon investigation will also be registered and analysed.

This study will enroll adult and pediatric participants across 3 phases: Research phase, Clinical Validation (CV) and Analytical Validation (AV) phase. Sites selected to participate in the study will enroll participants in the either the Research phase or CV and AV phase. Research Phase will enroll participants in Cohort 1 Pre-diagnosis/+GI symptoms only. CV and AV phase will be open to enrollment in parallel. CV phase will enroll participants in Cohort 2 Diagnosed IBD, Pre-treatment, Cohort 3 Potential Cross-Reactive Diseases and Cohort 4 Healthy controls. AV phase will enroll participants in Cohort 2 Diagnosed IBD, Pre-treatment and Cohort 4 Healthy controls. Enrollment will be ongoing until sponsor notification for closure.

IL-22 is an IL-10 family cytokine that plays major actions to increase intestinal epithelial barrier function and regeneration during experimental colitis. IL-22 binding protein is a small, soluble, and secreted protein potently inhibiting IL-22 actions through preventing the binding with IL-22 Recepteur. This study aims at characterizing how IL-22 binding protein is regulated in Inflammatory bowel disease to better understand the way IL-22 acts on epithelial cells during flares of the disease.

Two thirds of patients with Crohn's disease require intestinal surgery at some time in their life. Intestinal strictures, that is narrowing of the bowel due to inflammation and scarring, are the most common reason for surgery. Despite the high frequency, associated disability, and cost there are no are no treatment strategies that aim to improve the outcome of this disease complication. The STRIDENT (stricture definition and treatment) studies aim to determine biochemical and imaging features associated with the development of strictures and in related STRIDENT studies develop strategies for treatment.

The aim of this study is to compare the gut microbiota in Chinese patients with Inflammatory Bowel Disease (IBD) in Hong Kong with that of healthy controls, compare the gut microbiota in IBD patients in a developing country (low but increasing IBD incidence, Hong Kong) with those in a developed country (high incidence, Australia), compare the gut microbiota in Chinese patients with IBD in Hong Kong with the microbiota of their non-IBD affected parents and siblings.

Inflammatory Bowel Disease (IBD) is a chronic inflammatory disorder of the gastrointestinal tract that comprises two subtypes, Crohn's disease (CD) and Ulcerative Colitis (UC). Because the risk of IBD is greatest during the third decade of life, its impact for women is during the reproductive years. Women with inflammatory bowel disease are at a 2-fold higher risk of adverse outcomes during pregnancy as compared to the general population. Pregnancy is an especially vulnerable time for women with IBD, and out of misguided concerns that medications may confer unnecessary harms to their fetus, many women often stop taking life savings medications; without realizing that this sub-optimal adherence could actually lead to life threatening complications for them and their fetus. Counseling pregnant women with IBD is therefore an important step in improving medication adherence. The investigators hypothesize that counseling sessions with an IBD nurse that incorporates motivational interviewing and telemedicine-based follow-up sessions tailored to individual needs will improve medication adherence and pregnancy outcomes. The following specific aims are to be addressed by this multi-center randomized clinical trial comparing individual nurse-based counseling to standard of care: Specific Aim #1: To assess whether patient-centered counseling incorporating motivational interviewing and telemedicine-based follow-up by an IBD nurse leads to improved medication adherence during pregnancy and pregnancy outcomes Specific Aim #2: To validate the use of self-reported medication adherence during pregnancy in the IBD population

This is a prospective, controlled and observational study. Participants underwent a 3-hour exposure to hypoxic conditions simulating an altitude of 4,000 meters above sea level (m.a.s.l.) in a hypobaric pressure chamber. Clinical parameters, as well as blood and stool samples and biopsies from the sigmoid colon (by sigmoidoscopy) are collected at subsequent time points. The investigators goal is to evaluate if a 3-hour stay at high altitude (4, 000 m) can alter disease activity and can modulate a pro inflammatory reaction.

Inflammatory Bowel diseases (IBD) include Crohn's disease and ulcerative colitis. IBD's precise origin is unknown until now. Today, the current hypothesis of the disease pathogenesis is that IBD result from a dysregulated mucosal immune response to the gut microbial flora in genetically susceptible hosts. The intestinal homeostasis depends on interactions between immune and epithelial cells. Epithelial cells are the first line of defense, are tightly connected to the underlying gut associated lymphoid tissue and their alteration results in loss of tissue homeostasis. Vanin-1 (Vnn1 in mice, VNN1 in humans) is an epithelial pantheinase which regulates the cell response to stress. This ectoenzyme hydrolyses the vitamin B5-derivative pantetheine to provide cysteamine to tissues and regenerate pantothenate. Previous studies have shown that Vnn1 KO mice were more resistant to experimental colitis and administration of cystamine (oxidized form of cysteamine) restored their susceptibility to colitis. Furthermore, analysis of VNN1 expression in IBD patients show that high VNN1 expression is associated with severe clinical features. Thus, analysis of VNN1 expression could represent a good prognostic marker. In a recent published article, we characterized among a retrospective cohort of 500 IBD patients and controls new SNPs (single nucleotide polymorphisms) in the VNN1 promoter and showed their association with IBD incidence and high VNN1 expression. This suggested that the VNN1gene might be a new predisposition marker of IBD. In mouse, Vnn1 expression is tightly regulated by activation of PPARa and PPARg transcription factors. Interestingly, one of the SNPs identified in patients participates to a PPARg binding site. Interestingly, drugs related to the family of 5-ASA which are commonly used in IBD, have PPARgamma agonist potential. Therefore, quantifying VNN1 levels in patients under 5-ASA therapy might help predicting response to therapy and select patients with the highest benefit for this therapy. The purpose of this new project is to extend our initial analysis. The study will be prospective, monocentric and controlled. Its primary objective is to evaluate the level of VNN1 expression in the colonic mucosa between IBD patients and control subjects to confirm the correlation between high VNN1 expression and IBD. In relation with its prospective nature, we will also try to associate VNN1 expression level with specific endophenotypes (severity and/or localization of the lesions, quality of the response to therapy). Finally, we will screen patients for the previously identified SNPs to integrate this information in the interpretation of the results of expression analysis. This study is planned on 2 years. Two groups of patients will be constituted: one group will include IBD patients followed in the " Service de Gastro-entérologie du Pr Grimaud à l'Hôpital Nord " and the other group will constitute the control cohort including persons who were proposed a screening colonoscopy for familial history of colon cancer or polyps, or for Irritable Bowel Syndrome. The investigator will have to fill a questionnaire for each included patient, collecting information about age, sex, past medical history, taken medicine, digestive symptoms and colonoscopy indication. IBD patients will have a first set of biopsies (n = 10) and blood samples collected under general anesthesia during a colonoscopy planned in their IBD usual follow-up; a second set of similar samples will be collected within the next 12 months if an endoscopic control is medically justified. The control subjects will have only one set of biopsy and blood samples collected under general anesthesia during their colonoscopy. In the particular case of IBD patients who require surgery, a small piece of the resection will be collected ex-vivo on both healthy and pathologic areas. The blood sample will serve for quantification of the VNN1 seric pantheteinase activity and SNP's genetic study. The colonic biopsies will be obtained in duplicates from 5 different ileocolonic areas, one for histopathological analysis and the other for transcriptional analysis by qRT-PCR. The surgical samples will be used for transcriptional activity, tissue pantheteinase activity and constitution of TMA (Tissue MicroArrays) bank for immunohistochemistry. Expected benefits are to validate a new IBD prognostic marker for disease severity or potentially for evaluation of the therapeutic response.