Adenosine Triphosphate/antagonists & inhibitors; Apyrase/immunology; Immunity, Innate; Nephrosis, Lipoid/immunology; Nephrotic Syndrome/congenital; Neutrophils/metabolism; Receptors, Purinergic P1/metabolism; Receptors, Purinergic P2/metabolism; T-Lymphocytes, Regulatory/metabolism; Adenosine Triphosphate/metabolism; Adenosine-5'-(N-ethylcarboxamide)/pharmacology; Antigens, CD/biosynthesis; Antigens, CD/immunology; Apyrase/metabolism; Apyrase/pharmacology; CD4 Lymphocyte Count; Cells, Cultured; Child; Child, Preschool; Female; Flow Cytometry; Fluoresceins/analysis; Humans; Immunity, Innate/drug effects; Male; Nephrosis, Lipoid/metabolism; Nephrosis, Lipoid/pathology; Nephrotic Syndrome/immunology; Nephrotic Syndrome/metabolism; Nephrotic Syndrome/pathology; Neutrophils/immunology; Neutrophils/pathology; Purinergic P1 Receptor Agonists/pharmacology; Purinergic P1 Receptor Antagonists/pharmacology; Reactive Oxygen Species/metabolism; Receptors, Purinergic P1/immunology; Receptors, Purinergic P2/immunology; Respiratory Burst/drug effects; Respiratory Burst/immunology; Signal Transduction/drug effects; Signal Transduction/immunology; T-Lymphocytes, Regulatory/immunology; T-Lymphocytes, Regulatory/pathology