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Study of Uridine Triphosphate (UTP) as an Aerosol Spray for Cystic Fibrosis

This study has been completed.
University of North Carolina
Information provided by:
FDA Office of Orphan Products Development Identifier:
First received: February 24, 2000
Last updated: March 24, 2015
Last verified: March 1999

OBJECTIVES: I. Determine the stability of uridine triphosphate (UTP) and examine the metabolism of exogenous nucleotides on airway epithelial surfaces in patients with cystic fibrosis.

II. Determine the acute safety and efficacy of aerosolized UTP in children with cystic fibrosis.

Condition Intervention
Cystic Fibrosis Drug: amiloride Drug: uridine

Study Type: Interventional
Study Design: Primary Purpose: Treatment

Resource links provided by NLM:

Further study details as provided by FDA Office of Orphan Products Development:

Study Start Date: September 1996
Estimated Study Completion Date: January 1999
Detailed Description:

PROTOCOL OUTLINE: Patients may be treated on any of three different regimens. Patients may be treated on more than one regimen, if they meet the eligibility requirements.

Patients on regimen A are adults and receive uridine triphosphate (UTP) by inhalation, followed immediately by bronchoscopy.

Patients on regimen B are children, aged 4 to 10 years. Patients receive up to 4 graded doses of UTP by inhalation on day 1. On day 2, patients receive a single dose of UTP. Patients receive amiloride followed by UTP by inhalation on day 3.

Patients on regimen C are children, aged 4 to 18 years. Patients inhale a radiolabelled (technetium 99m) monodisperse iron oxide aerosol. Radiation deposited in the patient's lungs is monitored. Patients are randomized to receive one of 4 different aerosols (vehicle; UTP; amiloride; or UTP plus amiloride), which is inhaled for 20 minutes. Patients are followed 24 hours after aerosol exposure.

Regimen D is a dose escalation study in which patients are aged 9 to 40 years. Patients receive either the vehicle or UTP by inhalation 3 times daily for 3 days. Cohorts of 4 patients each are entered at each dose level.


Ages Eligible for Study:   4 Years and older   (Child, Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No


--Disease Characteristics-- Diagnosis of mild to moderate cystic fibrosis Small production of daily airway secretions Stable pulmonary course --Prior/Concurrent Therapy-- Radiotherapy: No radiation within 12 months to cause patient to exceed annual limits Other: No chronic medication for reactive airways disease At least 12 hours since inhaled beta-adrenergic agonists At least 24 hours since systemic theophylline --Patient Characteristics-- FEV1 greater than 50% predicted Other: Not pregnant Must perform reproducible spirometry

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Please refer to this study by its identifier: NCT00004705

Sponsors and Collaborators
FDA Office of Orphan Products Development
University of North Carolina
Study Chair: Michael R. Knowles University of North Carolina
  More Information Identifier: NCT00004705     History of Changes
Other Study ID Numbers: 199/13446
Study First Received: February 24, 2000
Last Updated: March 24, 2015

Keywords provided by FDA Office of Orphan Products Development:
cardiovascular and respiratory diseases
cystic fibrosis
genetic diseases and dysmorphic syndromes
rare disease

Additional relevant MeSH terms:
Cystic Fibrosis
Pathologic Processes
Pancreatic Diseases
Digestive System Diseases
Lung Diseases
Respiratory Tract Diseases
Genetic Diseases, Inborn
Infant, Newborn, Diseases
Natriuretic Agents
Physiological Effects of Drugs
Acid Sensing Ion Channel Blockers
Sodium Channel Blockers
Membrane Transport Modulators
Molecular Mechanisms of Pharmacological Action
Epithelial Sodium Channel Blockers
Diuretics, Potassium Sparing processed this record on July 19, 2017