High Vs. Standard Dose Influenza Vaccine in Lung Allograft Recipients
Purpose
Lung allograft recipients have a higher burden of influenza disease and greater associated morbidity and mortality compared with healthy controls. Induction and early maintenance immunosuppression is thought to impair immunogenicity to standard dose inactivated influenza vaccine. This early post-transplant period is when immunity is most desirable, since influenza disease during this time frame is associated with adverse consequences. Thus, strategies to reduce severe influenza disease in this highly susceptible population are critical. No trials in lung transplant recipients have evaluated two doses of HD-IIV within the same influenza season as a strategy to improve immunogenicity and durability of influenza prevention. Furthermore, no influenza vaccine trials have focused on enrollment of subjects at early post-transplant timepoints. Very few studies have been performed in solely lung allograft recipients. Immunosuppression intensity is highest in lung patients, thereby limiting comparisons to recipients of heart, liver, and kidney transplants. Therefore, studies to assess both HD-IIV and two-dose strategies in the same influenza season in post-lung transplant recipients are greatly needed. The central hypothesis of our proposal is that lung allograft recipients who are 1-35 months post-transplant and receiving two doses of HD-quadrivalent inactivated influenza vaccine (QIV) will have higher HAI geometric mean titers (GMT) to influenza antigens compared to those receiving two doses of SD-QIV. To test this hypothesis and address the above critical knowledge gaps, we propose to conduct a phase II, multi-center, randomized, double-blind, controlled immunogenicity and safety trial comparing the administration of two doses of HD-QIV to two doses of SD-QIV in lung allograft recipients 1-35 months post-transplant. The results of this clinical trial will address significant knowledge gaps regarding influenza vaccine strategies (e.g., one vs. two doses and HD-QIV vs. SD-QIV) and immune responses in lung transplant recipients and will guide vaccine recommendations during the post-transplant period.
Conditions
- Immunization; Infection
- Transplantation Infection
- Influenza
Eligibility
- Eligible Ages
- Over 16 Years
- Eligible Genders
- All
- Accepts Healthy Volunteers
- No
Inclusion Criteria
- Lung allograft recipients 2. Age ≥16 years at time of enrollment 3. ≥1 month (30 days) and <36 months post-lung transplant 4. Anticipated to be available for duration of the study 5. Can be reached by telephone, email, or text message
Exclusion Criteria
- Recipient of multi-organ, extra-pulmonary, and/or hematopoietic stem cell transplant 2. Recipient of a re-do lung transplant 3. History of severe hypersensitivity to previous influenza vaccination or anaphylaxis to eggs/egg protein 4. History of Guillain-Barre syndrome 5. HIV positive patients, by history or documentation from previous test 6. History of known severe latex hypersensitivity 7. History of receiving the current season's influenza vaccine post-transplant prior to enrollment in the study 8. Pregnant female 9. Proven influenza disease after September 1st and before first study vaccine (patient can still receive the second influenza vaccination despite proven influenza disease once enrolled) 10. CMVIG/IVIG/SCIG receipt within 28 days of each vaccine 11. Receipt of rituximab or other B-cell depleting antibody (including proteasome inhibitors) therapy within 3-months of 1st study vaccine (Day 0). 12. Receipt of augmented T-cell depleting therapy within 3-months of 1st study vaccine (Day 0) 13. Investigator concern about study participation
Study Design
- Phase
- Phase 2
- Study Type
- Interventional
- Allocation
- Randomized
- Intervention Model
- Parallel Assignment
- Intervention Model Description
- The primary goal of this study is to compare influenza vaccine immunogenicity and safety between two doses of HD-QIV and two doses of SD-QIV in a population of lung transplant recipients. The study will be powered on a comparison of the primary immunogenicity outcome. A nominal level of α = 0.05 (two-sided) will be used to determine statistical significance
- Primary Purpose
- Prevention
- Masking
- Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
- Masking Description
- All study staff, and subjects will be blinded to which vaccine the subject will receive, except for an un-blinded vaccinator. This individual will not inform the study team or the subjects which vaccine they administered to the subject. The un-blinded vaccinator will not participate in any other study activities. If the study vaccine is provided in a blinded manner, then research staff will be able to administer the vaccine, and an un-blinded vaccinator will not be necessary. The pharmacy will be un-blinded and will have a record of which vaccine was given to each subject.
Arm Groups
| Arm | Description | Assigned Intervention |
|---|---|---|
|
Experimental Two Doses High Dose Quadrivalent Inactivated Influenza Vaccine |
two doses of HD-QIV (0.7 mL; 60µg of each influenza antigen) 28-42 days apart |
|
|
Experimental Two Doses Standard Dose Quadrivalent Inactivated Influenza Vaccine |
receive two doses of SD-QIV (0.5 mL; 15µg of each influenza antigen) 28-42 days apart |
|
Recruiting Locations
Nashville, Tennessee 37232
More Details
- Status
- Recruiting
- Sponsor
- Vanderbilt University Medical Center
Detailed Description
Study Design: The proposed study is a phase II, multi-center, double-blind, randomized controlled immunogenicity and safety trial comparing two doses of HD-QIV to two doses of SD-QIV in lung allograft recipients. 1. Hypothesis 1: We hypothesize that lung allograft recipients 1-35 months post-transplant who receive two doses of HD-QIV will develop higher HAI GMTs to influenza antigens compared to lung allograft recipients receiving two doses of SD-QIV. Specific Aim 1: To compare the HAI GMTs to influenza antigens in lung allograft recipients after receiving either two doses of HD-QIV or two doses of SD-QIV. 2. Hypothesis 2: We hypothesize that administration of two doses of HD-QIV in lung transplant recipients will be well tolerated and the safety profile will be similar to two doses of SD-QIV with regard to solicited local and systemic side effects. Specific Aim 2: To compare the frequency and severity of solicited local and systemic adverse events in lung allograft recipients after receiving either two doses of HD-QIV or two doses of SD-QIV. 3. Hypothesis 3: We hypothesize that baseline immunophenotypic markers of exhaustion, immune senescence, and immune activation at the pre-vaccine timepoint will correlate with post-vaccine HAI titers. Specific Aim 3: To define the relationship between baseline phenotypes of T- and B-cell subsets, T-cell activation and post-vaccination HAI titers among lung allograft recipients receiving either two doses of HD-QIV or two doses of SD-QIV. Study Population: The study will enroll a total of approximately 270 subjects ≥16 years who have undergone lung transplantation within 1-35 months. Study Enrollment: The enrollment period will be over a three-years. Subjects will be randomized into one of two groups. Group 1 will receive two doses of HD-QIV (0.7 mL; 60μg of each influenza antigen), whereas Group 2 will receive two doses of SD-QIV (0.5 mL; 15μg of each influenza antigen). Influenza Surveillance: Active surveillance for influenza-like symptoms will begin when influenza season starts in each site's community, defined in previous trials as identification of at least two positive respiratory tests for influenza, with at least 10% of diagnostic tests positive during two consecutive weeks in the local clinical or research laboratory.41,42 Enrollment will continue during influenza season with nasal swabs obtained at all main visits to document the occurrence of influenza virus both prior to and after vaccination. During the influenza season, the study staff will attempt to do a weekly telephone and/or electronic communication with the participants to detect and document any influenza-like illness (ILI) and any specific COVID-19 like symptoms. If subjects meet ILI criteria and/or any specific COVID-19 like symptoms (see below), an additional nasal swab will be collected*. ILI criteria are met by occurrence of one of the conditions below: - Fever: ≥38°C (100.4°F) - Two or more of any of the following: respiratory symptoms (rhinorrhea, sinus congestion, post-nasal drip, shortness of breath, cough, wheezing, sputum production, sore throat, sneezing, watery eyes, ear pain, hoarseness); or systemic symptoms (myalgias, chills, chest pain, or headache); or new loss of taste or new loss of smell; or gastrointestinal symptoms (diarrhea or vomiting). - Per investigators' discretion at each individual site, a swab is not needed if there is a known non-respiratory cause of symptoms.