COVID-19 is an emerging, rapidly evolving situation.
Get the latest public health information from CDC:

Get the latest research information from NIH: Menu

Inflammation, Autonomic Dysfunction and Airway Disease

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00005298
Recruitment Status : Completed
First Posted : May 26, 2000
Last Update Posted : March 16, 2016
Information provided by:
National Heart, Lung, and Blood Institute (NHLBI)

Brief Summary:
To determine whether airway inflammation secondary to inhalation of specific allergens and other environmental agents and functional imbalance of the autonomic nervous system played important roles in asthma and chronic bronchitis.

Condition or disease
Lung Diseases Asthma Bronchitis Inflammation

Detailed Description:


Asthma and chronic bronchitis are among the most common chronic diseases afflicting middle-aged and elderly adults in the United States, respectively occurring in 4 percent and 5 percent of the population in these age groups. While chronic bronchitis is often caused by cigarette smoking and asthma often occurs in nonsmokers in association with atopy, the two conditions may be difficult to differentiate in many middle-aged and older adults and may share a number of pathophysiologic features including increased airway smooth muscle tone, increased airway responsiveness to bronchoconstricting stimuli, and bronchial mucus hypersecretion. The precise mechanisms which produce the alterations of airway function are not clear. Such functional alterations may be caused by airway inflammation and abnormalities of the autonomic nervous system; however, there are little population data available regarding the importance of airway inflammation and disordered neural regulation in the pathogenesis of airway hyperresponsiveness and mucus hypersecretion. Also, little is known about potential interactions between airway inflammation and disordered neural regulation of airway function in the pathogenesis of chronic airways disease. Information on the relationships may offer insights into the pathophysiologic mechanisms underlying asthma and chronic bronchitis in adults.


The study was cross-sectional and used a subgroup of the Normative Aging Study, a longitudinal study of aging in men established by the Veterans Administration in 1963. The study used data normally collected during NAS examinations and included smoking history, socio-economic status, anthropometry, respiratory symptoms and illnesses, and pulmonary function. New data were collected on: indices of inflammation as indicated by histamine, leukotriene, and serotonin in urine; autonomic activity as indicated by urinary catecholamine excretion and heart rate variation induced by deep breathing; autonomic responsiveness as measured by pupillary alpha-adrenergic and cholinergic responses.

The study completion date listed in this record was obtained from the "End Date" entered in the Protocol Registration and Results System (PRS) record.

Layout table for study information
Study Type : Observational
Study Start Date : July 1990
Actual Study Completion Date : June 1993

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

Layout table for eligibility information
Ages Eligible for Study:   up to 100 Years   (Child, Adult, Older Adult)
Sexes Eligible for Study:   Male
Accepts Healthy Volunteers:   No
No eligibility criteria


Layout table for additonal information Identifier: NCT00005298    
Other Study ID Numbers: 2021
R01HL045089 ( U.S. NIH Grant/Contract )
First Posted: May 26, 2000    Key Record Dates
Last Update Posted: March 16, 2016
Last Verified: June 2000
Additional relevant MeSH terms:
Layout table for MeSH terms
Lung Diseases
Pathologic Processes
Respiratory Tract Diseases
Bronchial Diseases
Lung Diseases, Obstructive
Respiratory Tract Infections