Novel Blood Test to Predict Safe Foods for Infants and Toddlers With Food Protein-induced Enterocolitis Syndrome (FPIES)

Pediatric Disorder Clinical Trial

Official title:

A Novel Blood Test to Predict Safe (Non-trigger) Foods for Infants and Toddlers With Food Protein-induced Enterocolitis Syndrome (FPIES)

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT04644783
• Other study ID #: HUM00156027
• Status: Completed
• Phase: N/A
• Start date: October 8, 2019
• Est. completion date: March 22, 2022

Study information

• Verified date: April 2024
• Source: University of Michigan
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

The aim of this study is to validate a blood test that can identify safe foods for food protein-induced enterocolitis syndrome (FPIES). This study proposes a solution to the problems of FPIES by developing a new blood assay that screens a large number of foods (more than 20) in a culture plate. If this blood test is successful it may be able to identify safe foods more quickly.

The study will recruit 10 participants that will have more than 2 trigger foods.

Description:

Participants will complete surveys and have blood draws during the study. Additionally, participants will be asked to keep track of their diet as well as introduce safe foods identified by the researchers.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 10
• Est. completion date: March 22, 2022
• Est. primary completion date: March 22, 2022
• Accepts healthy volunteers: No
• Gender: All
• Age group: 1 Month to 7 Years

Eligibility

Inclusion Criteria:

• Diagnosis of FPIES

• Have to have documented reactions to 2-3 trigger foods with recurrent delayed vomiting or documented reactions to 4 or more trigger foods with recurrent delayed vomiting.

Exclusion Criteria:

• Patients who are currently on medications that suppress the immune system

• Patients who do not have at least 2 trigger foods identified.

• Patients who have a history of an organic Gastrointestinal (GI) disease (e.g., inflammatory bowel disease, celiac disease, biliary disorders, bowel resection), cardiac, pulmonary, neurologic, renal, endocrine, or gynecological pathology

• Lack of parental or guardian informed consent.

Related Conditions & MeSH terms

• Allergies
• Enterocolitis
• Food Protein-Induced Enterocolitis Syndrome
• Pediatric Disorder
• Syndrome

Intervention

Diagnostic Test:
• Blood test assay
Participants will have their blood drawn and be evaluated with a new blood assay that screens a large number of foods (more than 20) in a culture plate. Participants will be asked to eat the identified safe foods by the the blood assay.

Locations

Country	Name	City	State
United States	University of Michigan	Ann Arbor	Michigan

Sponsors (1)

Lead Sponsor	Collaborator
University of Michigan

Country where clinical trial is conducted

United States, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Negative Predictive Value (NPV), Defined as the Percentage of Test-predicted Safe Foods That Are Actually Safe Foods.	A Receiver operating characteristic (ROC) curve was built to estimate the NPV. A random-effects logit model was used to model the binary outcome (safe or trigger food) as a function of the 9 biomarker measurements in the assay. (Expression Value = Relative fold change of 9-gene expression panel in response to food treatment, divided by fold change in response to LPS treatment, multiplied by 1000). The random effect in the logit model took into consideration the correlated data measured within the same subject. A cluster ROC curve analysis was used to assess the precision of the assay. Specifically, the area was computed under the cluster ROC curve (AUC). A threshold to obtain the NPV was selected based on inspection of the ROC curve.; At the initial visit, participants had their blood drawn, which was assayed. On average, participants came in up to 4 weeks later after the test results were ready. Participants were then asked to trial a new food each week for up to 7 weeks.	Up to 7 weeks from the first blood trial, on average 11 weeks
Secondary	Positive Predictive Value (PPV), Defined as the Percentage of Test-predicted Unsafe Foods That Are Actually Unsafe Foods.	The same ROC curve described for the primary outcome was used to derive the PPV. At the initial visit, participants had their blood drawn, which was assayed. On average, participants came in up to 4 weeks later after the test results were ready. Participants were then asked to trial a new food each week for up to 7 weeks.	Up to 7 weeks from the first blood trial, on average 11 weeks