T Cell Memory Fuels the Innate Response in Chronic CF Lung Disease
Public ClinicalTrials.gov record NCT04397861. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
This study seeks to define the role of CD4+ and CD8+ T cell memory responses in the immunologic failure of patients with cystic fibrosis (CF) to clear infections. In a normal host, the immune system clears pathogens upon re-infection more swiftly and efficiently than during an initial infection, in great part due to the recall and effector functions of memory T cells. In CF, far less is understood regarding the response of T cell memory when hosts reencounter antigens, otherwise known as pulmonary exacerbations. Pulmonary exacerbations are pivotal events that lead to a decline in health status among CF patients, with many never recovering to baseline health. CF patients will be recruited from patients followed by the Adult CF Program at National Jewish Health. Following enrollment at the time of antibiotic initiation, blood will be collected at two different time points. The first samples will be collected within 24 hours of starting IV antibiotic therapy. The second blood specimen will be collected at the end of hospitalization, after a minimum of 5 days. At the time of each blood draw, complete blood counts, a sputum sample, and simple spirometry will be measured as part of the standard care of a CF exacerbation. Isolated PBMCs will be stained with antibodies to designate cell surface phenotype. They will then be sorted to identify the T cell population. These cells will be tested on their ability to clear pathogens. The relationship between cellular immune responses and clinical indicators of pulmonary status will be examined by fitting linear mixed models.
Study identification
- NCT ID
- NCT04397861
- Recruitment status
- Completed
- Study type
- Observational
- Phase
- Not listed
- Enrollment
- 112 participants
Conditions and interventions
Conditions
Interventions
Not listed
Eligibility (public fields only)
- Age range
- 18 Years and older
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- May 5, 2015
- Primary completion
- Apr 30, 2019
- Completion
- Oct 31, 2021
- Last update posted
- Sep 28, 2022
2015 – 2021
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| National Jewish Health | Denver | Colorado | 80206 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT04397861, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Sep 28, 2022 · Synced Sep 10, 2026
Related: full search, browse by condition, browse by drug or therapy, browse by sponsor, browse by U.S. city.
Open the official record
The complete protocol, eligibility criteria, and contact information for NCT04397861 live on ClinicalTrials.gov.