Active clinical trials for "Celiac Disease"

This is an evaluation of celiac-specific patient reported outcome instruments in celiac disease patients.

One in 100 people suffers from coeliac disease. It affects the lining of the bowel and causes many symptoms such as diarrhoea, wind, stomach pain, constipation and nausea. The only treatment so far is a strict glutenfree diet for life which reverses the bowel damage and often improves symptoms. Up to 25% of patients however may have persistent symptoms despite the gluten free diet but the reasons for this are not clear. This research aims to help us understand how the gluten free diet works. Investigators will use medical imaging (magnetic resonance imaging or MRI) to measure the volumes of fluid in the small bowel, the size of the large bowel and the time it takes for foods to go through the entire bowel in patients who have just been diagnosed with coeliac disease by their hospital doctor. Investigators will also carry out a breath test and collect a stool sample for basic analysis of the stool bacteria. Investigators will also collect questionnaires about their feelings and their bowel habits and will try to see how the MRI measurements relate to the patients' symptoms. Investigators will observe how all these measures change after one year of the gluten free diet that doctors will have prescribed as part of the coeliac patients' standard care. As such there is no dietary intervention in this study, investigators will simply study changes in the patients due to their standard treatment. Investigators will also look at a matched group of healthy volunteers to gather a likely reference range of the measurements. This research will be carried out in Nottingham with the help of the specialist coeliac clinics and it will last 3 years. There is a dedicated Coeliac Patient Public Involvement group who have helped plan this study.

This study will assess the effect of gluten on gut barrier function. Investigators at the Mayo Clinic have developed a new gut permeability test using rhamnose (sugar & water solution), and are hoping to prove its effectiveness in a clinical setting.

Citrulline is an amino acid produced in the intestine and in the liver, but the liver does not contribute significantly to circulating citrulline concentrations. The intestine is thus the only organ that normally releases significant amounts of citrulline into the blood. The investigators have designed a study looking at the value of measuring plasma citrulline concentration in patients with Crohn's disease and short bowel or normal intestinal length. Measuring the plasma citrulline concentration in short bowel patients may help to distinguish between patients who need permanent parenteral feeding from patients with just transient intestinal dysfunction. It may also help the investigators in understanding the small bowel intestinal length remaining and the absorptive integrity. In patients with normal intestinal length and Crohn's disease, it may be a reliable marker of small bowel damage and could be applied to establish therapeutic improvements. It has been demonstrated to strongly correlate (inversely) with severity on intestinal biopsies. The investigators hypothesise that the plasma citrulline concentration is a marker for small bowel absorptive integrity and an appropriate surrogate for functional length of the small intestine. Controlled data do not yet exist to establish the place of plasma citrulline in the assessment of small bowel function in man.

Celiac disease (CD) was diagnosed for years almost exclusively in children. This is due to the fact that in adulthood it manifests in a much more attenuated form, while the classic form with severe diarrhea, malnutrition and dehydration is observed almost exclusively in children. Classic studies, carried out prior to the widespread use of serology as a CD diagnostic tool, already showed that there is variability in gluten sensitivity and that in a non-negligible proportion of cases (10%) gluten sensitivity appears to be transient. Subsequent studies, including patients diagnosed by serology or population screening studies, suggest that progression to gluten latency or tolerance may occur in a higher proportion of patients, ranging from 20 to 50% depending on the geographical region. In the first decade of the 2000s, the researchers group performed a prevalence observational cross-sectional study survey in Catalonia (autonomous region in the northeast of Spain) that accurately reflected the distribution of the reference Catalan population in terms of sex and age. The results showed a drastic and significant drop in the prevalence of CD disease in relation to age, with the prevalence of CD in children being 5 times higher than adults (1:71 vs. 1:357). Strikingly, the reduction in prevalence was especially notable in the first 4 years of life. Two possibilities were proposed to explain this unexpected finding in a disease that is lifelong: 1) The existence of an environmental effect (cohort effect) acting as a disease trigger in early childhood during the study period (e.g., bacterial or viral infections, vaccines, food policies related to gluten introduction, use of antibiotics, etc.). 2) The appearance of age-related tolerance to gluten in a proportion of cases. Interestingly, it has been suggested that immunological tolerance might be more frequent in children diagnosed with CD before the age of two. The aims of the present epidemiological study are: 1) to determine the prevalence of CD in Catalonia in children under 5 years of age and compare it with the results obtained in the previous 2004-2007 study; 2) to investigate the potential effect of environmental factors on disease prevalence; and 3) to evaluate longitudinally the appearance of tolerance to gluten in the CD cases detected. Therefore, this study has been designed using exactly the same CD screening methodology and reproducing the reference population in the same geographical area as the previous 2004-2007 study.

Study Aims: To analyze stool specimens to test and validate the CalproLab assay against the predicate PhiCal in order to determine performance characteristics. And to correlate Calpro levels to the gut microbiome composition.

To the investigators' knowledge, no single long-term prospective observational study has assessed dietary factors, diabetes clinical variables (metabolic control and associated complications), and self -perceived health and wellness in T1D patients (both pediatric and adult) with CD identified by screening (positive/weakly positive serology). The aim of the current study is to observe the short- and long-term outcomes for Type 1 diabetic patients with new serology positive asymptomatic CD.

The investigators will perform prospective observational multicenter study which includes children with suspicion of CD who referred to gastroscopy and intestinal biopsies (study group) and children without suspicion of CD who underwent gastroscopy for other reasons. The investigators will compare sensitivity, specificity and predictive values of several serological kits of TG2 (tissue transglutaminase) (Bioplex 2200, Bioflash, Phadia 250, Liason-XL, Orgentec Alergia and Eurospital) compared with definitive diagnosis of CD according to histological findings.

This is a prospective randomized controlled trial investigating the impact of educational bidirectional text message reminders on gluten free diet adherence among adolescents and young adults with celiac disease age 12-24. Participants will complete a series of online questionnaires assessing quality of life, patient activation, celiac symptoms, and self reported dietary adherence at the beginning and end of the study. Participants will also have their blood drawn to measure Tissue Transglutaminase IgA (TTG IgA) antibody and Deamidated Gliadin Peptide IgA (DGP IgA) at the beginning and end of the study. Lab draws can be done locally, and are at no cost to the participant. Patients are randomized to the intervention or control group based on enrollment TTG IgA. Intervention group receives 45 unique text messages over the 3 month study. A gift card is provided for participation in the study.

The purpose of this study is to estimate the prevalence of celiac disease in a population of men and women newly referred to fertility treatment in Danish public fertility clinics.