Th1, Th2, Th17 Phenotype in Urea Cycle Disorders

Completed

• Conditions: Lysinuric Protein Intolerance; Urea Cycle Disorder

• Registration Number: NCT05706714
• Lead Sponsor: Istanbul University - Cerrahpasa (IUC)

Brief Summary

Infection-related hyperammonemia in patients with urea cycle disorders is an important cause of morbidity and mortality. The relationship between immune system cells and the metabolic pathways used by these cells and inborn errors of metabolism is still under investigation. Current studies are generally based on experiments in mice. The investigators' goal is to study specific T cell subsets to understand the effects of the urea cycle on T cells.

The investigators collected blood samples from participants with lysinuric protein intolerance and urea cycle disorders for basic immunophenotyping, lymphocyte proliferation in response to phytohemagglutinin and CDmix, and cytokine analysis involving Th1, Th2, and Th17 and compared them with age-matched healthy controls. They also examined amino acid profiles in sera and supernatants before and after stimulation with PMA-ionomycin.

Detailed Description

The investigators aim to compare cellular immune response of T cell phenotype and proliferative functions in addition to lymphocyte subset analysis between urea cycle disorders and healthy controls.

Complete blood counts, immunoglobuline levels, lymptocyte subset analysis and Thelper cells will be analyzed. Additionally, T helper cells will be measured regarding their cytokine profile as Th1, Th2 and Th17. T cell proliferation response and aminoacid profiles in supernatants before and after stimulation will be measured.

Study Timeline

• Study Start: 2021-04-06
• Primary Completion: 2022-12-13
• Study First Submitted: 2023-01-23
• Study First Submitted QC: 2023-01-23
• Study First Posted: 2023-01-31
• Status Verified: 2023-09
• Study Completion: 2023-09-01
• Last Update Submitted: 2023-09-26
• Last Update Posted: 2023-09-28

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 65

Inclusion Criteria

• Children without any chronic conditions and having normal immunoglobulins and lymphocyte subsets

Exclusion Criteria

• For healthy control, children having any signs for primary immune deficiencies

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Measurement of Th1, Th2 and Th17 cells	baseline	Th1, Th2 and Th17 cells will be measured following stimulation in cell culture

Secondary Outcome Measures

Name	Time	Method
Measurement of T cell proliferative capacity	baseline	T cells' proliferation will be measured following stimulation in cell culture

Trial Locations

Locations (1)

Istanbul University-Cerrahpasa; 🇹🇷 Istanbul, Turkey