- ICH GCP
- US Clinical Trials Registry
- Klinisk forsøg NCT00340444
Genetic Studies of Inflammatory Bowel Disease
Genetic Study of Inflammatory Bowel Disease
This study will examine the existence of genetic regions that are believed to bring about a risk for inflammatory bowel disease (IBD), with its subtypes of Crohn's disease and ulcerative colitis. It will identify the locations of chromosomes responsible for hereditary IBD through linkage analysis, a technique in genetic research in which the occurrence of a disorder in a family is evaluated alongside a known genetic disorder. The project will also do fine mapping of genes and examine possible genes associated with IBD.
IBD is a chronic and often disabling disorder of the gastrointestinal tract, affecting about 500,000 Americans. Both Crohn's disease and ulcerative colitis share many characteristics, such as abdominal pain, bloody diarrhea, fever, fatigue, and malnutrition. But the main factors that distinguish these subtypes depend on the location and depth of inflammation. Tests and analyses can generally pinpoint some of the differences between the two, but sometimes there are major overlaps in characteristics, and the diagnosis is known as indeterminate IBD. The exact cause of IBD is not known, but genetic and environmental factors are known to contribute to risk for the disease. The single most important environmental risk factor has been smoking exposure at the time the diagnosis is made. Also, several genetic risk factors are ethnicity, family history, and polymorphisms-abilities to take on different forms-in the NOD2 gene.
Patients who have a diagnosis of IBD and their family members 5 years of age and older who have or do not have that diagnosis may be eligible for this study.
Participants will be asked to complete a questionnaire on their health, ethnic background, religion, habits, family medical history, and medications. Information will also be sought on the diagnosis, course, complications, and treatment of IBD, as well as risk factors. In addition, there will be collection of blood to be used for DNA preparation, storage of lymphocytes, and information on immunology.
Studieoversigt
Status
Betingelser
Detaljeret beskrivelse
Undersøgelsestype
Tilmelding
Kontakter og lokationer
Studiesteder
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Illinois
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Chicago, Illinois, Forenede Stater, 60637
- University of Chicago
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Maryland
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Baltimore, Maryland, Forenede Stater, 21205
- Johns Hopkins Bloomberg School of Public Health
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Baltimore, Maryland, Forenede Stater, 21205
- Johns Hopkins University School of Medicine
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Massachusetts
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Boston, Massachusetts, Forenede Stater, 02118-2354
- Boston University Medical Center
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Pennsylvania
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Pittsburgh, Pennsylvania, Forenede Stater, 15261
- University of Pittsburgh
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Deltagelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
- Barn
- Voksen
- Ældre voksen
Tager imod sunde frivillige
Køn, der er berettiget til at studere
Beskrivelse
- INCLUSION CRITERIA:
Participants who have a diagnosis of IBD and their family members who have or do not have a diagnosis of IBD will be recruited for this study. Those further selected to be included in the linkage study must have at least two affected family members who are willing to donate blood samples and to fill out medical questionnaires.
EXCLUSION CRITERIA:
Children who were under the age of 5 years were excluded from the Johns Hopkins University recruitment protocol. There was no age restriction for the University of Chicago or the University of Pittsburgh. Those who were not able to provide consent were excluded from the study.
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Samarbejdspartnere og efterforskere
Publikationer og nyttige links
Datoer for undersøgelser
Studer store datoer
Studiestart
Studieafslutning
Datoer for studieregistrering
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først opslået (Skøn)
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Nøgleord
Yderligere relevante MeSH-vilkår
Andre undersøgelses-id-numre
- 999904045
- 04-HG-N045
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