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Normal Human Plasma Level of iNOS Study

This study has been completed.
National Institute of General Medical Sciences (NIGMS)
Information provided by (Responsible Party):
Dr. Robert Webber, Research & Diagnostic Antibodies Identifier:
First received: May 16, 2012
Last updated: November 23, 2013
Last verified: November 2013
The discovery that inducible nitric oxide synthase (iNOS) circulates in people who are developing the sepsis pathology has provided an opportunity to develop a first-in-class diagnostic test for the onset of sepsis. This study is designed to determine the normal human plasma level of circulating iNOS as the initial reference level against which hospitalized patients at risk for the development of sepsis can be compared to ascertain if the patient is at risk for becoming septic based upon an elevated level of plasma iNOS.

Normal Human Plasma Level of iNOS

Study Type: Observational
Study Design: Observational Model: Cohort
Time Perspective: Prospective
Official Title: Determination of the Normal Human Plasma Level of Inducible Nitric Oxide Synthase (iNOS) Using the PliNOSa Test

Further study details as provided by Dr. Robert Webber, Research & Diagnostic Antibodies:

Primary Outcome Measures:
  • Determination of the normal healthy human reference range for plasma iNOS [ Time Frame: At time of blood donation ]
    The primary endpoint is the determination of the normal human plasma level of iNOS as the reference interval of the mean and it's 95% confidence interval. .

Biospecimen Retention:   Samples Without DNA
heparinized plasma samples

Enrollment: 100
Study Start Date: May 2012
Study Completion Date: September 2013
Primary Completion Date: May 2013 (Final data collection date for primary outcome measure)
Normal healthy adults
The concentration of iNOS will be measured in plasma samples obtained at the time of blood donation from normal healthy adult humans

Detailed Description:
Infections in intensive care units (ICUs) and other hospital settings can be caused by different types of organisms, such as bacteria and fungi. Yearly, these infections cause at least 2 million patients in the USA to enter the early stages of the sepsis pathology (pre-sepsis) which will lead to more than 750,000 cases of sepsis that can deteriorate into life-threatening severe sepsis with organ dysfunction and septic shock with multiple organ failure and result in more than 250,000 deaths per year. At present, an accurate clinical lab test to predict the onset of the sepsis pathology does not exist. Thus, there is a large unmet clinical lab need for a test that can aid physicians in assessing the risk their hospitalized patients have for developing the sepsis pathology. A reliable test for predicting very early the onset of sepsis would be a major medical breakthrough. However, a reference level for normal healthy individuals is needed against which plasma levels can be compared for increased (or decreased) levels of iNOS.

Ages Eligible for Study:   18 Years to 79 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Sampling Method:   Probability Sample
Study Population
Reference values will be obtained from 100 plasma samples obtained from healthy normal humans collected prospectively under an IRB approved protocol and informed consent after blood donation for use in research. The 100 normal human plasma samples will be assayed using the PliNOSa test.

Inclusion Criteria:

  • Male or female
  • Aged 18-79 years of age
  • In generally good health

Exclusion Criteria:

  • Cannot be a prisoner
  Contacts and Locations
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Please refer to this study by its identifier: NCT01605695

United States, Nevada
Research & Diagnostic Antibodies
North Las Vegas, Nevada, United States, 89032
Sponsors and Collaborators
Research & Diagnostic Antibodies
National Institute of General Medical Sciences (NIGMS)
Principal Investigator: Robert J Webber, Ph.D. Research & Diagnostic Antibodies
  More Information

How to Define and Determine Reference Intervals in the Clinical Laboratory - Approved Guidelines, Second Edition, C28 A2, Vol 20, No. 3.

Responsible Party: Dr. Robert Webber, President and Project PI, Research & Diagnostic Antibodies Identifier: NCT01605695     History of Changes
Other Study ID Numbers: RDAbs 12-002
1RC3GM093717-01 ( U.S. NIH Grant/Contract )
Study First Received: May 16, 2012
Last Updated: November 23, 2013

Keywords provided by Dr. Robert Webber, Research & Diagnostic Antibodies:
reference range
inducible nitric oxide synthase
healthy adults

Additional relevant MeSH terms:
Nitric Oxide
Bronchodilator Agents
Autonomic Agents
Peripheral Nervous System Agents
Physiological Effects of Drugs
Anti-Asthmatic Agents
Respiratory System Agents
Free Radical Scavengers
Molecular Mechanisms of Pharmacological Action
Neurotransmitter Agents
Endothelium-Dependent Relaxing Factors
Vasodilator Agents
Protective Agents processed this record on September 21, 2017