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Using Rheological Methods to Characterize Cystic Fibrosis (CF) Sputum and the Effects of Mucoactive Agents (GIST)

This study has been completed.
ClinicalTrials.gov Identifier:
First Posted: September 25, 2008
Last Update Posted: March 5, 2014
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.
Genentech, Inc.
Information provided by (Responsible Party):
University of California, San Francisco
The purpose of this study is to characterize the rheological properties of cystic fibrosis (CF) and healthy sputum and to examine the effects of mucoactive agents on the rheology of CF and healthy sputum. By collaborating with Genentech, the investigators (scientists at UCSF) plan to incorporate the latest scientific findings into our work to discover and develop new treatments for CF.

Cystic Fibrosis

Study Type: Observational
Study Design: Observational Model: Case Control
Time Perspective: Prospective
Official Title: Using State-of-the-art Rheological Methods to Characterize CF Sputum and the Effects of Mucoactive Agents: A Pilot Study

Resource links provided by NLM:

Further study details as provided by University of California, San Francisco:

Primary Outcome Measures:
  • Shear Rheology [ Time Frame: Cross-sectional ]
    Baseline measure of sputum shear rheology

Biospecimen Retention:   Samples Without DNA

Enrollment: 38
Study Start Date: October 2007
Study Completion Date: December 2012
Primary Completion Date: December 2012 (Final data collection date for primary outcome measure)
Cystic Fibrosis
People who have been diagnosed with cystic fibrosis
People who do not have cystic fibrosis and who do not have any other lung conditions

Detailed Description:
There are two major mechanisms for mucus clearance in the airway, both of which are dependent upon optimal mucus viscosity and elasticity. These mechanisms are severely impaired in cystic fibrosis. The physical properties of sputum can be measured using rheological methods, enabling comparison between mucus in health and in disease. Therapies which enhance mucus clearance from the airway and decrease the volume of airway secretions are collectively called "mucoactive agents." Therapies which specifically disrupt innate mucus architecture by breaking intermolecular entanglements and bonds are called mucolytic agents. Mucolytic drugs can be considered in three general categories: classic mucolytics (n-acetylcysteine), peptide mucolytics (Pulmozyme®), and non-destructive mucolytics (hypertonic saline). Using state-of-the-art rheological methods, we can characterize the physical properties of CF mucus and measure the rheologic effects of mucoactive drugs more accurately and reproducibly than what has been previously done in the literature. In this way, we will determine which of the current mucoactive agents are most effective in normalizing sputum rheology in CF, and we will gain important insights about the limitations of current mucoactive drugs.

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 65 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
Study Population
People who have cystic fibrosis and those who do not have any lung disease

Inclusion Criteria:

  • Healthy control subjects:

    • Age 18-65
    • No history of lung disease or cardiac disease
  • Cystic fibrosis subjects:

    • Age 18-65
    • Diagnosis of CF - sweat chloride values > 60 mM on pilocarpine iontophoresis sweat tests and/or 2 allelic CF-producing mutations by genetic analysis

Exclusion Criteria:

  • Use of recreational drugs within 1 year prior to enrollment
  • Use of tobacco within 1 year prior to enrollment, or > 10 pack-year tobacco history
  • Upper respiratory tract infection in the 4 weeks prior to enrollment in the study
  • Current use of antihistamines to treat allergies
  Contacts and Locations
Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT00758771

United States, California
UCSF Airway Clinical Research Center
San Francisco, California, United States, 94143-0130
Sponsors and Collaborators
University of California, San Francisco
Genentech, Inc.
  More Information

Additional Information:
Responsible Party: University of California, San Francisco
ClinicalTrials.gov Identifier: NCT00758771     History of Changes
Other Study ID Numbers: 10-02116
First Submitted: September 22, 2008
First Posted: September 25, 2008
Results First Submitted: January 22, 2014
Results First Posted: March 5, 2014
Last Update Posted: March 5, 2014
Last Verified: January 2014

Additional relevant MeSH terms:
Cystic Fibrosis
Pathologic Processes
Pancreatic Diseases
Digestive System Diseases
Lung Diseases
Respiratory Tract Diseases
Genetic Diseases, Inborn
Infant, Newborn, Diseases