Biomaterial Database

[Purine nucleoside phosphorylase (PNP) deficiency]. 1996

T Sakiyama

Department of 1st Pathology, St. Marianna University School of Medicine.

The clinical manifestation, diagnosis, pathogenesis, pathophysiology and treatment of purine nucleoside phosphorylase (PNP) deficiency is overviewed. Among the severe combined immunodeficiency syndrome (SCID), PNP deficiency was 2ndly found as an autosomal recessively heritable purine metabolic disease. This disease is characterized by severe T-cell immunodysfunction accompanied by marked low level of uricemia and uricosuria. In addition, this concurrence strongly suggests the diagnosis of PNP deficiency. Neurological manifestations are found in two-third of the reported cases. About 30 cases have been reported worldwide. Their ages at onset varied from birth to 6 years and their outcome is usually fatal terminating in viral infection or lymphoma. Our first case and her sister died with varicella and lymphoma, respectively. No clinical benefit was found with normalized uricemia after erythrocyte transfusion in our case. Bone marrow transplantation and future gene therapy are reviewed.

UI	MeSH Term	Description	Entries
D009154	Mutation	Any detectable and heritable change in the genetic material that causes a change in the GENOTYPE and which is transmitted to daughter cells and to succeeding generations.	Mutations
D011683	Purine-Nucleoside Phosphorylase	An enzyme that catalyzes the reaction between a purine nucleoside and orthophosphate to form a free purine plus ribose-5-phosphate. EC 2.4.2.1.	Inosine Phosphorylase,Nicotinamide Riboside Phosphorylase,Purine Nucleoside Phosphorylases,Nucleoside Phosphorylases, Purine,Phosphorylase, Inosine,Phosphorylase, Nicotinamide Riboside,Phosphorylase, Purine-Nucleoside,Phosphorylases, Purine Nucleoside,Purine Nucleoside Phosphorylase,Riboside Phosphorylase, Nicotinamide
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D013601	T-Lymphocytes	Lymphocytes responsible for cell-mediated immunity. Two types have been identified - cytotoxic (T-LYMPHOCYTES, CYTOTOXIC) and helper T-lymphocytes (T-LYMPHOCYTES, HELPER-INDUCER). They are formed when lymphocytes circulate through the THYMUS GLAND and differentiate to thymocytes. When exposed to an antigen, they divide rapidly and produce large numbers of new T cells sensitized to that antigen.	T Cell,T Lymphocyte,T-Cells,Thymus-Dependent Lymphocytes,Cell, T,Cells, T,Lymphocyte, T,Lymphocyte, Thymus-Dependent,Lymphocytes, T,Lymphocytes, Thymus-Dependent,T Cells,T Lymphocytes,T-Cell,T-Lymphocyte,Thymus Dependent Lymphocytes,Thymus-Dependent Lymphocyte
D015316	Genetic Therapy	Techniques and strategies which include the use of coding sequences and other conventional or radical means to transform or modify cells for the purpose of treating or reversing disease conditions.	Gene Therapy,Somatic Gene Therapy,DNA Therapy,Gene Therapy, Somatic,Genetic Therapy, Gametic,Genetic Therapy, Somatic,Therapy, DNA,Therapy, Gene,Therapy, Somatic Gene,Gametic Genetic Therapies,Gametic Genetic Therapy,Genetic Therapies,Genetic Therapies, Gametic,Genetic Therapies, Somatic,Somatic Genetic Therapies,Somatic Genetic Therapy,Therapies, Gametic Genetic,Therapies, Genetic,Therapies, Somatic Genetic,Therapy, Gametic Genetic,Therapy, Genetic,Therapy, Somatic Genetic
D016026	Bone Marrow Transplantation	The transference of BONE MARROW from one human or animal to another for a variety of purposes including HEMATOPOIETIC STEM CELL TRANSPLANTATION or MESENCHYMAL STEM CELL TRANSPLANTATION.	Bone Marrow Cell Transplantation,Grafting, Bone Marrow,Transplantation, Bone Marrow,Transplantation, Bone Marrow Cell,Bone Marrow Grafting
D016511	Severe Combined Immunodeficiency	Group of rare congenital disorders characterized by impairment of both humoral and cell-mediated immunity, leukopenia, and low or absent antibody levels. It is inherited as an X-linked or autosomal recessive defect. Mutations occurring in many different genes cause human Severe Combined Immunodeficiency (SCID).	Bare Lymphocyte Syndrome,Immunodeficiency, Severe Combined,Omenn Syndrome,Immunodeficiency Syndrome, Severe Combined,Immunologic Deficiency, Severe Combined,Omenn's Syndrome,Reticuloendotheliosis, Familial,Severe Combined Immune Deficiency,Severe Combined Immunodeficiency Syndrome,Severe Combined Immunologic Deficiency,Bare Lymphocyte Syndromes,Combined Immunodeficiencies, Severe,Combined Immunodeficiency, Severe,Familial Reticuloendothelioses,Familial Reticuloendotheliosis,Immunodeficiencies, Severe Combined,Lymphocyte Syndrome, Bare,Lymphocyte Syndromes, Bare,Omenns Syndrome,Reticuloendothelioses, Familial,Severe Combined Immunodeficiencies,Syndrome, Bare Lymphocyte,Syndrome, Omenn,Syndrome, Omenn's,Syndromes, Bare Lymphocyte