Phase II Study of Ribose, Uridine, and Thymidine for a Complex Syndrome Involving Excessive 5'-Nucleotidase Activity

OBJECTIVES: I. Evaluate the efficacy of oral ribose in patients with a complex 5'-nucleotidase syndrome who have not received uridine (UR) and thymidine (TDR).

II. Evaluate the efficacy of UR/oral ribose and UR/TDR. III. Evaluate the efficacy of oral ribose given in combination with UR/TDR.

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Key information

Conditions

5'-Nucleotidase Syndrome 5-Nucleotidase syndrome Congenital, Hereditary, and Neonatal Diseases and Abnormalities Disease Attributes Genetic Diseases, Inborn Metabolic Diseases Metabolism, Inborn Errors Nutritional and Metabolic Diseases Pathologic Processes Pathological Conditions, Signs and Symptoms Rare Diseases

Age range

0 year–21 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 2

About this study

PROTOCOL OUTLINE: Newly identified patients receive ribose daily for 8 weeks. Patients who improve continue therapy. If improvement then reaches a plateau, uridine (UR) and thymidine (TDR) are added to the regimen.

Patients who receive no benefit after 8 weeks of ribose are treated with UR/TDR. Patients who improve after 8 weeks of this combination continue therapy.

Ribose is added to the treatment regimen for patients on UR/TDR at entry. At maximal improvement, TDR and UR are sequentially tapered.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

PROTOCOL ENTRY CRITERIA:

--Disease Characteristics-- Complex syndrome with excessive skin fibroblast 5'-nucleotidase activity characterized by: Recurrent infection Seizure disorder Speech impairment Attention deficit and behavior problems --Prior/Concurrent Therapy-- Concurrent uridine and thymidine therapy allowed --Patient Characteristics-- Other: No pregnant women

Treatment and study plan

ribose

Drug

thymidine

Drug

uridine

Drug

Sponsors and collaborators

Lead sponsor

National Center for Research Resources (NCRR)

Nih

Collaborators

University of California, San Diego

Registry information

Important dates

Study start: 1995
First posted: Feb 25, 2000
Registry last updated: Jun 24, 2005

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

Published trials that share one or more normalized conditions with this study.

Completed