Nitric Oxide, Endothelin-1, and the Patency of Ductus Arteriosus in Preterm Infants

This study has been completed.
Information provided by:
National Taiwan University Hospital Identifier:
First received: September 12, 2005
Last updated: November 22, 2005
Last verified: October 2001

BACKGROUND Patent ductus arteriosus (PDA) is a frequent clinical event in preterm infant. The cardiopulmonary functions of these preterm babies may be adversely affected by the patency of ductus arteriosus. Ductal tissues are sensitive to the constricting effect of endothelin-1 and the dilating effect of prostaglandins, inflammatory mediators, and concentration of oxygen.

OBJECTIVE To examine the role of endogenous nitric oxide (NO) and endothelin-1 (ET-1) in the pathogenesis of patent ductus arteriosus of the preterm infants. We hypothesize that the patency of ductus arterious in preterm infants is probably due to inappropriate production of endogenous nitric oxide and the interaction with various inflammatory mediators and prostaglandins, which is different from those of term infants. In addition, the secretion of endothelin is probably decreased. The purpose of this study is to monitor the changes of these substance sequentially, and to evaluate the relationship among endothelin-1, endogenous nitric oxide, and inflammatory mediators in the pathophysiology of patent ductus arteriosus in preterm infants.


  1. Inclusion criteria:

    1. Preterm infants with gestational age less than 32 weeks or birth weight less than 2000 gm.
    2. Informed consent
  2. Numbers of study population:

    With 80-100 evaluable infants (40-50 patients in PDA and non-PDA groups, respectively)

  3. Blood sample, collecting on day 1,3,7 after regular echocardiographic evaluation, is assessed for inflammatory mediator (IL-8, IL-10), nitric oxide metabolites (nitrite and nitrate), endothelin-1, and cGMP
  4. Statistical analysis: Student t-test testing the differences of clinical data, Wilcoxon signed rank test for comparing data obtained between the PDA and non-PDA patients, the PDA patients before and after intravenous indomethacin, and those who are responsive or refractory to the therapy.

Patent Ductus Arteriosus

Study Type: Observational
Study Design: Observational Model: Defined Population
Time Perspective: Cross-Sectional
Official Title: The Role of Nitric Oxide, Endothelin-1, and Inflammatory Mediators in the Patency of Ductus Arteriosus in Preterm Infants

Resource links provided by NLM:

Further study details as provided by National Taiwan University Hospital:

Estimated Enrollment: 80
Study Start Date: January 2002
Estimated Study Completion Date: December 2002

Ages Eligible for Study:   up to 1 Year
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Clinical diagnosis of the patency of ductus arteriosus

Exclusion Criteria:

  • Congenital anomalies
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Please refer to this study by its identifier: NCT00162903

Sponsors and Collaborators
National Taiwan University Hospital
Study Director: Wu Shiun Hsieh, M.D National Taiwan University Hospital
  More Information Identifier: NCT00162903     History of Changes
Other Study ID Numbers: 26955 
Study First Received: September 12, 2005
Last Updated: November 22, 2005
Health Authority: Taiwan: Department of Health

Keywords provided by National Taiwan University Hospital:
Preterm infant, Patent ductus arteriosus, Nitric oxide,Endothelin-1

Additional relevant MeSH terms:
Ductus Arteriosus, Patent
Cardiovascular Abnormalities
Cardiovascular Diseases
Congenital Abnormalities
Heart Defects, Congenital
Heart Diseases
Nitric Oxide
Anti-Asthmatic Agents
Autonomic Agents
Bronchodilator Agents
Cardiovascular Agents
Endothelium-Dependent Relaxing Factors
Free Radical Scavengers
Molecular Mechanisms of Pharmacological Action
Neurotransmitter Agents
Peripheral Nervous System Agents
Pharmacologic Actions
Physiological Effects of Drugs
Protective Agents
Respiratory System Agents
Therapeutic Uses
Vasodilator Agents processed this record on April 27, 2016