Evaluation of Food Hypersensitivity in Children/Adolescents With Functional Dyspepsia
The main purpose of this study is to determine if standard and investigational tests used to help diagnose and treat food allergies can provide information that will be useful in determining the cause of dyspepsia and helpful in designing a treatment plan. The study will also determine if there is a connection between positive allergy tests and inflammation in the upper abdomen.
|Study Design:||Allocation: Non-Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Single Group Assignment
Masking: Single Blind (Outcomes Assessor)
Primary Purpose: Supportive Care
|Official Title:||Food-Specific IgE, IgG, IgG4, Skin Prick Testing and Atopy Patch Testing in Children/Adolescents With Functional Dyspepsia: A Pilot Study|
- measure specific IgE, IgG total, IgG subclass 4, skin prick tests and atopy patch tests to milk, egg, soy, corn, peanut and wheat [ Time Frame: 48 hrs and 72 hrs after patch placement ] [ Designated as safety issue: No ]
- Determine T-lymphocytes, eosinophils and mast cell densities on duodenal biopsy samples demonstrating eosinophilia [ Time Frame: collected at time of biopsy, patient group only ] [ Designated as safety issue: No ]
|Study Start Date:||June 2006|
|Study Completion Date:||September 2008|
|Primary Completion Date:||September 2008 (Final data collection date for primary outcome measure)|
Device: in vitro and in vivo allergy testing
Patch Test: food to be tested is suspended in sterile saline, placed on the skin of the back using a Finn Chamber secured with surgical tape and left in place for 48 hours.
Recurrent abdominal pain is the most common type of pain in school age children and young adolescents. Over 80% of these children have pain in the upper abdomen which is diagnosed as functional dyspepsia (FD). Many of these children are also found to have eosinophilic duodenitis (ED). ED is a type of inflammation in the lining of the gastrointestinal tract characterized by an increase in eosinophils. An increase in intestinal eosinophils is a finding also seen with food allergy upon exposure to the offending antigen. The presence of intestinal eosinophilia in ED would suggest an allergic mechanism may be involved in the generation of pain and other symptoms associated with ED. Endoscopy and biopsy are used to aid in the identification of ED, which often is followed by elimination diets and food challenges to identify the offending allergen. This approach is both invasive (due to endoscopy) and cumbersome (due to the complexity and restrictiveness of the elimination diet). The value of screening for food hypersensitivities in children with ED has not been well characterized despite the theoretical links between food hypersensitivities, gut inflammation, and symptoms of dyspepsia. The current study will determine if standard and investigational tests used to evaluate food hypersensitivity have the potential to be used as biomarkers to direct treatment of children with ED.
|United States, Missouri|
|The Children's Mercy Hospital and Clinics|
|Kansas City, Missouri, United States, 64108|
|Principal Investigator:||Nancy A Neilan, MT (ASCP)||The Children's Mercy Hospital and Clinics|