Cystic FibrosisNCT05054582
COVID-19 Antibody Responses In Cystic Fibrosis: CAR-CF
An observational study of Cystic Fibrosis and Covid19, run by Medical University Innsbruck at 1 site in Austria.
Trial summary
Coronavirus disease 2019 (COVID-19) which is caused by the virus SARS-CoV-2 has resulted in an ongoing global pandemic. It is unclear whether the relatively low number of reported cases of COVID-19 in people with CF (pwCF) is due to enhanced infection prevention practices or whether pwCF have protective genetic/immune… Read more about this study
- Who is it for?
- Any age
- Conditions the study is for
- Cystic Fibrosis, Covid19
- How many people
- 152 participants
- Where
- 1 siteAustria
- Study dates
- 1 Sep 2021to 30 Nov 2024
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages Any age
- All sexes
- No healthy volunteers
- Child, Adult, Older adult
Study population: Consenting people with cystic fibrosis of any age, genotype, transplant status and disease severity will be eligible to participate in the study. The study population is expected to be representative of the general CF population.
Who may be able to join
- Consenting people with cystic fibrosis of any age, genotype, transplant status and disease severity
Who cannot join
- Refusal to give informed consent
- Contraindication to venepuncture
Trial locations and contacts
1 site in 1 country.
Austria1 site
CF Centre Innsbruck, Medical University of Innsbruck, Univ. Clinic for Paediatics III
Innsbruck, Tyrol, 6020
About this study
Coronavirus disease 2019 (COVID-19) which is caused by the virus SARS-CoV-2 has resulted in an ongoing global pandemic. It is unclear whether the relatively low number of reported cases of COVID-19 in people with CF (pwCF) is due to enhanced infection prevention practices or whether pwCF have protective genetic/immune factors. This study aims to prospectively assess the proportion of pwCF, including both adults and children with CF who have evidence of SARS-CoV-2 antibodies over a two-year period. This study will also examine whether pwCF who have antibodies for SARS-CoV-2 have a different clinical presentation and what impact this has on their CF disease. The proposed study will recruit pwCF from paediatric and adult CF centres in Europe. Serological testing to detect antibodies will be performed on blood samples taken at month 0, 6, 12, 18 and 24 with additional time-points if bloodwork is available via normal clinical care. Clinical data on, lung function, CF-related medical history, pulmonary exacerbations, antibiotic use, and microbiology and vaccination receipt, will be collected during routine clinical assessments.
Associations will be examined between socio-demographic and clinical variables and serologic testing. The effects of SARS-CoV-2 infection on clinical outcomes and analyse end-points will be examined to explore any age-related or gender-based differences, as well as subgroup analysis of outcomes in lung-transplant recipients and pwCF receiving CFTR modulator therapies. As pwCF receive COVID-19 vaccination a comparison of the development and progression of anti-SARS-CoV-2 antibodies in pwCF following natural infection and vaccination SARS-CoV-2 over time will be performed.
Read the detailed description
This is a prospective, longitudinal cohort study in people with Cystic Fibrosis (pwCF) that involves repeated serial sampling of participants. This study design was chosen to provide comprehensive information on SARS-CoV-2 seroprevalence changes over time and the subsequent clinical impact on pwCF. The study will be conducted at participating CF centres over a 3-year period. Study participants will include paediatric and adult pwCF. Participating investigators can enrol all eligible pwCF over a 12-month period. Participants are then followed up for 24 months. Participants will donate blood samples at their routine clinic visits. Blood samples will be collected at Day 0 (baseline), at Months 6, 12, 18 and 24 (to coincide with routine clinical reviews). Additional blood samples will be taken opportunistically every time the participant visits the clinic for blood draws. These blood samples could be related to, routine care, annual review visits, pulmonary exacerbations (PEx), CF complications or when initiating new treatments (e.g. CFTR modulators).
Serum from blood samples will be shipped to a central laboratory (Queen's University Belfast) for standardized measurement of SARS-CoV-2 antibodies.
Alongside the blood samples the investigators will also collect clinical data from the patient's health records and will input this data into the case report form (CRF). Clinical data will be collected in conjunction with routine care visits, according to local clinical practice. Investigators will collect data elements from information routinely recorded in the patients' medical records. Data will be collected at baseline, month 6, 12, 18 and 24 as per the study schedule, and at additional blood sampling timepoints as previously explained above. Data collection will include routine data
available from CF clinic follow-ups including background demographic information, CF medical history, medications, exacerbation information, sputum microbiology and clinical and lung function parameters. Information on SARS-CoV-2 infection history and vaccine receipt will also be collected.
The maximum follow-up duration of participation in the study for each patient will be 24 months. This study duration (24-month follow-up) is justified as it provides sufficient time to observe changes in antibody prevalence over the course of the COVID-19 pandemic as well as sufficient time to determine long term clinical outcomes for pwCF who are SARS-CoV-2 seropositive. Furthermore, we anticipate the 2-year study follow-up period will provide sufficient time to observe the impact of vaccination on antibody levels given that a number of vaccines are now commercially available.
The investigators will compare the level of antibody responses between natural COVID-19 infection and vaccination in pwCF and how this varies over time. This will be achieved by analyzing seroprevalence and antibody levels according to natural infection and vaccination status and according to time of sample post infection or post vaccination, if known.
Optional Study sample collection:
For participants who consent, a second blood sample will also be drawn into EDTA tubes (plasma). Consent to this optional study sample would allow this sample and any remaining serum (following antibody testing) to be stored for future analysis and allow further research to be carried out on related studies to COVID-19 and CF.
- Conditions
- Cystic Fibrosis, Covid19
- Keywords
- Pathologic Processes, Pancreatic Diseases, Digestive System Diseases, Lung Diseases, Respiratory Tract Diseases, Genetic Diseases, Inborn, Infant, Newborn, Diseases
- Medical subject headings
- Cystic Fibrosis, COVID-19, Pathologic Processes, Pancreatic Diseases, Digestive System Diseases, Lung Diseases, Respiratory Tract Diseases, Genetic Diseases, Inborn
What is being measured
The primary outcome is the main question the study is designed to answer.
SARS-COV-2 seroprevalence
proportion of pwCF with at least 1 seropositive result over the study period and the difference in this proportion by age, geographical area and over time.
Measured: 3-year period (comprising a 1-year enrollment period and a 2-year follow-up)
Association of SARS-CoV-2 seropositivity, clinical symptoms and clinical outcomes in pwCF
incidence of symptomatic COVID-19 over the study period and severity; proportion of seropositive pwCF with subsequent CF exacerbation compared to pwCF who are seronegative; death rate in pwCF with at least one seropositive result compared to pwCF who are seronegative.
Measured: 3-year period (comprising a 1-year enrollment period and a 2-year follow-up)
Longitudinal comparison of the detection including level and duration of anti-SARS-CoV-2 antibodies in pwCF following natural infection and SARS-CoV-2 vaccination.
Longitudinal comparison of the detection including level and duration of anti-SARS-CoV-2 antibodies in pwCF following natural infection and SARS-CoV-2 vaccination.
Measured: 3-year period (comprising a 1-year enrollment period and a 2-year follow-up)
Secondary outcomes (1)
Serum proteomic and genomic responses of pwCF who are SARS-CoV-2 seropositive an seronegative.
Serum proteomic and genomic responses of pwCF who are SARS-CoV-2 seropositive an seronegative.
Measured: anticipated 5-10 years
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted23 Sep 2021
- Study start1 Sep 2021
- Primary completion30 Sep 2024
- Study completion30 Nov 2024
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Cystic FibrosisStudies of the same condition, open and under way.
- More trials run by Medical University InnsbruckThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Cohort
- Time perspective
- Prospective
- Enrolment
- 152 participants (actual)
Sponsor and investigators
- Lead sponsor
- Medical University Innsbruck
- Sponsor type
- University, hospital or other
- Collaborators
- Queen's University, Belfast, European Cystic Fibrosis Society - Clinical Trials Network, Cystic Fibrosis Foundation
- Responsible party
- Sponsor
- Investigators
- Dorothea Appelt, MD, Principal investigator, Medical University of Innsbruck, CF Centre Innsbruck, Univ. Clinic for Paediatrics III
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT05054582
- Sponsor's protocol ID
- CAR-CF V1.0_21April2021
- Status last verified
- Jul 2023
- First submitted
- 20 Sep 2021
- Last updated
- 2 Feb 2026
- Results posted
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
Study at a glance
From the registry record, last updated by the sponsor on 2 Feb 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- COVID-19 Antibody Responses In Cystic Fibrosis: CAR-CF
- ClinicalTrials.gov ID
- NCT05054582
- Acronym / sponsor ID
- CAR-CF V1.0_21April2021
- Conditions
- Cystic Fibrosis, Covid19
- Keywords
- Pathologic Processes, Pancreatic Diseases, Digestive System Diseases, Lung Diseases, Respiratory Tract Diseases, Genetic Diseases, Inborn, Infant, Newborn, Diseases
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 152 participants (actual)
- Lead sponsor
- Medical University InnsbruckUniversity, hospital or other
- Collaborators
- Queen's University, Belfast, European Cystic Fibrosis Society - Clinical Trials Network, Cystic Fibrosis Foundation
- Study start
- 1 Sep 2021 (actual)
- Primary completion
- 30 Sep 2024 (actual)
- Study completion
- 30 Nov 2024 (actual)
- First posted
- 23 Sep 2021 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Coronavirus disease 2019 (COVID-19) which is caused by the virus SARS-CoV-2 has resulted in an ongoing global pandemic. It is unclear whether the relatively low number of reported cases of COVID-19 in people with CF (pwCF) is due to enhanced infection prevention practices or whether pwCF have protective genetic/immune factors. This study aims to prospectively assess the proportion of pwCF, including both adults and children with CF who have evidence of SARS-CoV-2 antibodies over a two-year period. This study will also examine whether pwCF who have antibodies for SARS-CoV-2 have a different clinical presentation and what impact this has on their CF disease. The proposed study will recruit pwCF from paediatric and adult CF centres in Europe. Serological testing to detect antibodies will be performed on blood samples taken at month 0, 6, 12, 18 and 24 with additional time-points if bloodwork is available via normal clinical care. Clinical data on, lung function, CF-related medical history, pulmonary exacerbations, antibiotic use, and microbiology and vaccination receipt, will be collected during routine clinical assessments.
Associations will be examined between socio-demographic and clinical variables and serologic testing. The effects of SARS-CoV-2 infection on clinical outcomes and analyse end-points will be examined to explore any age-related or gender-based differences, as well as subgroup analysis of outcomes in lung-transplant recipients and pwCF receiving CFTR modulator therapies. As pwCF receive COVID-19 vaccination a comparison of the development and progression of anti-SARS-CoV-2 antibodies in pwCF following natural infection and vaccination SARS-CoV-2 over time will be performed.
Detailed description
This is a prospective, longitudinal cohort study in people with Cystic Fibrosis (pwCF) that involves repeated serial sampling of participants. This study design was chosen to provide comprehensive information on SARS-CoV-2 seroprevalence changes over time and the subsequent clinical impact on pwCF. The study will be conducted at participating CF centres over a 3-year period. Study participants will include paediatric and adult pwCF. Participating investigators can enrol all eligible pwCF over a 12-month period. Participants are then followed up for 24 months. Participants will donate blood samples at their routine clinic visits. Blood samples will be collected at Day 0 (baseline), at Months 6, 12, 18 and 24 (to coincide with routine clinical reviews). Additional blood samples will be taken opportunistically every time the participant visits the clinic for blood draws. These blood samples could be related to, routine care, annual review visits, pulmonary exacerbations (PEx), CF complications or when initiating new treatments (e.g. CFTR modulators).
Serum from blood samples will be shipped to a central laboratory (Queen's University Belfast) for standardized measurement of SARS-CoV-2 antibodies.
Alongside the blood samples the investigators will also collect clinical data from the patient's health records and will input this data into the case report form (CRF). Clinical data will be collected in conjunction with routine care visits, according to local clinical practice. Investigators will collect data elements from information routinely recorded in the patients' medical records. Data will be collected at baseline, month 6, 12, 18 and 24 as per the study schedule, and at additional blood sampling timepoints as previously explained above. Data collection will include routine data
available from CF clinic follow-ups including background demographic information, CF medical history, medications, exacerbation information, sputum microbiology and clinical and lung function parameters. Information on SARS-CoV-2 infection history and vaccine receipt will also be collected.
The maximum follow-up duration of participation in the study for each patient will be 24 months. This study duration (24-month follow-up) is justified as it provides sufficient time to observe changes in antibody prevalence over the course of the COVID-19 pandemic as well as sufficient time to determine long term clinical outcomes for pwCF who are SARS-CoV-2 seropositive. Furthermore, we anticipate the 2-year study follow-up period will provide sufficient time to observe the impact of vaccination on antibody levels given that a number of vaccines are now commercially available.
The investigators will compare the level of antibody responses between natural COVID-19 infection and vaccination in pwCF and how this varies over time. This will be achieved by analyzing seroprevalence and antibody levels according to natural infection and vaccination status and according to time of sample post infection or post vaccination, if known.
Optional Study sample collection:
For participants who consent, a second blood sample will also be drawn into EDTA tubes (plasma). Consent to this optional study sample would allow this sample and any remaining serum (following antibody testing) to be stored for future analysis and allow further research to be carried out on related studies to COVID-19 and CF.
Study design
- Observational model
- Cohort
- Time perspective
- Prospective
Who may qualify
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Child, Adult, Older adult
- Study population
- Consenting people with cystic fibrosis of any age, genotype, transplant status and disease severity will be eligible to participate in the study. The study population is expected to be representative of the general CF population.
Key inclusion criteria (1 listed)
- Consenting people with cystic fibrosis of any age, genotype, transplant status and disease severity
Key exclusion criteria (2 listed)
- Refusal to give informed consent
- Contraindication to venepuncture
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
SARS-COV-2 seroprevalence
Time frame: 3-year period (comprising a 1-year enrollment period and a 2-year follow-up)
proportion of pwCF with at least 1 seropositive result over the study period and the difference in this proportion by age, geographical area and over time.
Association of SARS-CoV-2 seropositivity, clinical symptoms and clinical outcomes in pwCF
Time frame: 3-year period (comprising a 1-year enrollment period and a 2-year follow-up)
incidence of symptomatic COVID-19 over the study period and severity; proportion of seropositive pwCF with subsequent CF exacerbation compared to pwCF who are seronegative; death rate in pwCF with at least one seropositive result compared to pwCF who are seronegative.
Longitudinal comparison of the detection including level and duration of anti-SARS-CoV-2 antibodies in pwCF following natural infection and SARS-CoV-2 vaccination.
Time frame: 3-year period (comprising a 1-year enrollment period and a 2-year follow-up)
Longitudinal comparison of the detection including level and duration of anti-SARS-CoV-2 antibodies in pwCF following natural infection and SARS-CoV-2 vaccination.
1 secondary outcome
Serum proteomic and genomic responses of pwCF who are SARS-CoV-2 seropositive an seronegative.
Time frame: anticipated 5-10 years
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 2 Feb 2026.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Dorothea Appelt, MD principal investigator
Medical University of Innsbruck, CF Centre Innsbruck, Univ. Clinic for Paediatrics III
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Cystic Fibrosis and Covid19, run by Medical University Innsbruck at 1 site in Austria.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 2 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 2 Feb 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Austria. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
SARS-COV-2 seroprevalence (time frame: 3-year period (comprising a 1-year enrollment period and a 2-year follow-up)). The study lists 3 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 2 Feb 2026.