Background: Pyrimidine and purine metabolism disorders (DPPMs) affect how the body metabolizes chemicals called pyrimidines and purines. DPPMs can cause dysfunctions throughout the body, especially in the brain, blood, kidneys, and immune system. People with DPPMs might have no symptoms, mild symptoms, or they may have severe, chronic symptoms, that can be fatal. DPPMs are not well understood, and researchers want to learn more about what causes them and how to treat them. Objective: To learn more about factors that affect DPPMs by comparing test results from affected, uaffected family members, and healthy people. Eligibility: Three types of participants are needed: people aged 1 month and older with DPPMs; their family members who do not have DPPMs; and healthy volunteers. Design: Participants with DPPMs will come to the clinic once a year; some may be asked to come more often. At each visit, all affected participants will have a physical exam and give samples of blood, urine, saliva, and stool. Depending on their symptoms, they may also have other procedures, such as: Swabs of their skin and inside the mouth. Tests of their heart, kidney, brain, and nerve function. Questionnaires about what they eat. Dental exams, and exams of their hearing and vision. Tests of their learning ability. Monitoring of their physical activity. Imaging scans. Photographs of their face and body. These tests may be spread over up to 7 days. Affected participants may remain in the study indefinitely if they wish to. Healthy volunteers and family members will have 1 study visit. They will have a physical exam and may be asked to give blood, urine, saliva, and stool samples.
Accepts Healthy Volunteers
Healthy volunteers are participants who do not have a disease or condition, or related conditions or symptoms |
No |
Study Type
An interventional clinical study is where participants are assigned to receive one or more interventions (or no intervention) so that researchers can evaluate the effects of the interventions on biomedical or health-related outcomes. An observational clinical study is where participants identified as belonging to study groups are assessed for biomedical or health outcomes. Searching Both is inclusive of interventional and observational studies. |
Observational |
Eligible Ages | 1 Month and Over |
Gender | All |
Trial ID:
This trial id was obtained from ClinicalTrials.gov, a service of the U.S. National Institutes of Health, providing information on publicly and privately supported clinical studies of human participants with locations in all 50 States and in 196 countries. |
NCT06092346 |
Phase
Phase 1: Studies that emphasize safety and how the drug is metabolized and excreted in humans. Phase 2: Studies that gather preliminary data on effectiveness (whether the drug works in people who have a certain disease or condition) and additional safety data. Phase 3: Studies that gather more information about safety and effectiveness by studying different populations and different dosages and by using the drug in combination with other drugs. Phase 4: Studies occurring after FDA has approved a drug for marketing, efficacy, or optimal use. |
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Lead Sponsor
The sponsor is the organization or person who oversees the clinical study and is responsible for analyzing the study data. |
National Human Genome Research Institute (NHGRI) |
Principal Investigator
The person who is responsible for the scientific and technical direction of the entire clinical study. |
Oleg A Shchelochkov, M.D. |
Principal Investigator Affiliation | National Human Genome Research Institute (NHGRI) |
Agency Class
Category of organization(s) involved as sponsor (and collaborator) supporting the trial. |
NIH |
Overall Status | Recruiting |
Countries | United States |
Conditions
The disease, disorder, syndrome, illness, or injury that is being studied. |
AMPD3, OMIM*102772, AMP Deaminase Deficiency, AK1, OMIM *103000, Adenylate Kinase Deficiency, AMPD1, OMIM *102770, Myopathy Due to Myoadenylate Deaminase Deficiency, TPMT, OMIM *187680, Thoipurines, Poor Metabolism of, IMPDH1, OMIM *146690, Retinitis Pigmentosa Type 10, Leber Congenital Amauriosis Type 11, APRT, OMIM *102600, Adenine Phosphoribosyltransferase Deficiency, HPRT1, OMIM *308000 Lesch-Nyhan Disease, XDH, OMIM *607633, Xanthinuria Type 1, SLC2A9, OMIM *606142 Hypouricemia, SLC22A12, OMIM *607096 Hypouricemia, PRPS1 Def, OMIM *311850, Arts Syndrome; Charcot-Marie-Tooth Disease, PRPS1 SA, OMIM *311850 Gout, PRPS-related Phosphoribosylpyrophosphate Synthetase Superactivity, AMPD2, OMIM *102771, Spastic Paraplegia 63; Pontocerebellar Hypoplasia, ITPA, OMIM *147520, Inosine Triphosphatase Deficiency; Developmental and Epileptic Encephalopathy 35, ADSL, OMIM *608222, Adenylosuccinate Lyase Deficiency, PNP, OMIM *164050, Nucleoside Phosphorylase Deficiency, ADA2, OMIM *607575,Sneddon Syndrome; VAIHS, CAD, *1140120, Developmental and Epileptic Encephalopathy, UPB1, OMIM *606673, Beta-ureidopropionase Deficiency, DPYS, OMIM *613326, Dihydropyrimidinase Deficiency, DPYD, OMIM *274270, Dihydropyrimidine Dehydrogenase Deficiency, DHODH, OMIM *126064, Miller Syndrome (Postaxial Acrofacial Dysostosis), UMPS, OMIM *613891, Orotic Aciduria, NT5C3A<TAB>, OMIM *606224, Anemia, Hemolytic, Due to UMPH1 Deficiency, UNG, OMIM *191525, Hyper-IgM Syndrome 5, AICDA, OMIM *605257, Immunodeficiency With Hyper-IgM, Type 2; HIGM2, Purine-Pyrimidine Metabolism, Metabolic Disease |
Study Website: | View Trial Website |
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