Th1, Th2, Th17 Phenotype in Urea Cycle Disorders

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. Our goal was to study specific T cell subsets to understand the effects of the urea cycle on T cells.We collected blood samples from patients 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. We also examined amino acid profiles in sera and supernatants before and after stimulation with PMA-ionomycin.

Inclusion Criteria:Children without any chronic conditions and having normal immunoglobulins and lymphocyte subsetsExclusion Criteria:For healthy control, children having any signs for primary immune deficiencies