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Role of Toxins in Lung Infections Caused by Pseudomonas Aeruginosa

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.
 
ClinicalTrials.gov Identifier: NCT00027183
Recruitment Status : Completed
First Posted : November 28, 2001
Last Update Posted : September 25, 2019
Sponsor:
Information provided by (Responsible Party):
National Institutes of Health Clinical Center (CC) ( National Heart, Lung, and Blood Institute (NHLBI) )

Brief Summary:

Some bacteria that cause disease can produce toxic substances that may worsen the disease. Pseudomonas aeruginosa is a bacteria that can produce a variety of toxins and is of special interest for patients with cystic fibrosis and repeated long term lung infections.

The goal of this study is to determine whether specific toxins produced by Pseudomonas aeruginosa may be important in the disease process of chronic lung infections of patients with cystic fibrosis.

This study will attempt to measure bacterial production of toxins in blood and sputum and immune system response to toxins in the blood....


Condition or disease
Pseudomonas Infection Cystic Fibrosis

Detailed Description:
The goal of this study is to determine whether virulence determinants that use the type III-secretory pathway may be important in the pathogenesis of chronic Pseudomonas aeruginosa lung infections in patients with cystic fibrosis (CF). The studies will quantify bacterial effector proteins in serum and sputum and the immune response to specific products as reflected by antibodies in serum. Candidate effector proteins include: (1) exotoxin A, a non-type III-dependent ADP-ribosyltransferase and cytotoxin that does not use the Type III secretory pathway, (2) ExoS, a type III pathway-dependent extracellular ADP-ribosyltransferase with cytotoxic activity, (3) ExoU, another type III-dependent cytotoxin, that is responsible for epithelial injury in acute lung infections, and (4) PcrV, a homolog to the V antigen of Yersinia.

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Study Type : Observational
Actual Enrollment : 134 participants
Observational Model: Case-Control
Time Perspective: Prospective
Official Title: Role of Exotoxins in the Pathogenesis of Pseudomonas Aeruginosa
Study Start Date : February 5, 1998

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Cystic Fibrosis

Group/Cohort
1
Healthy Volunteers
2
Cystic Fibrosis subjects




Information from the National Library of Medicine

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Ages Eligible for Study:   9 Years to 99 Years   (Child, Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
patients with cystic fibrosis being treated with antibiotics, patients with cystic fibrosis who have not undergone antibiotic therapy, and control patients.@@@@@@
Criteria
  • INCLUSION CRITERIA:

Patients with cystic fibrosis with a defined mutation in the cystic fibrosis transmembrane regulator (CFTR) (e.g., any of the known variants of the CFTR gene, such as the delta F508 allele).

Patients will have been tested or will be tested for the CFTR gene under another protocol.

Research volunteers that are age-and race-matched as control subjects.

EXCLUSION CRITERIA:

Patients who are less than 9 years of age. Research volunteers less than 18 years of age.

Patients or research volunteers who test positive for human immunodeficiency virus (HIV) or a positive serum test for hepatitis B and/or C virus.

Patients or research volunteers who test positive for tuberculosis.

Research volunteers with pulmonary disease or infection.


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): NCT00027183


Locations
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United States, Maryland
National Institutes of Health Clinical Center, 9000 Rockville Pike
Bethesda, Maryland, United States, 20892
Sponsors and Collaborators
National Heart, Lung, and Blood Institute (NHLBI)
Investigators
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Principal Investigator: Joel Moss, M.D. National Heart, Lung, and Blood Institute (NHLBI)

Additional Information:
Publications:
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Responsible Party: National Heart, Lung, and Blood Institute (NHLBI)
ClinicalTrials.gov Identifier: NCT00027183     History of Changes
Other Study ID Numbers: 980062
98-H-0062
First Posted: November 28, 2001    Key Record Dates
Last Update Posted: September 25, 2019
Last Verified: March 12, 2019
Keywords provided by National Institutes of Health Clinical Center (CC) ( National Heart, Lung, and Blood Institute (NHLBI) ):
Cystic Fibrosis
Effector Proteins
Cytotoxin
Lung Injury
Genetic Screen
Additional relevant MeSH terms:
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Infection
Pseudomonas Infections
Cystic Fibrosis
Fibrosis
Pathologic Processes
Pancreatic Diseases
Digestive System Diseases
Lung Diseases
Respiratory Tract Diseases
Genetic Diseases, Inborn
Infant, Newborn, Diseases
Gram-Negative Bacterial Infections
Bacterial Infections