- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT06202703
Fine Needle aSpiration of Lymph nodEs to Study vAccine-induced Immunity (SEA)
Optimisation of Lymph Node Fine Needle Aspiration to Study Pneumococcal Vaccine-induced Immunity
Rationale Causing a wide range of infectious diseases, including pneumonia, otitis media and meningitis, S. pneumoniae represents an important global health problem. Pneumococcal vaccines are clinically effective in preventing invasive pneumococcal disease, but the underlying immune response is likely to differ due to the inclusion of T cell epitopes in the conjugate, but not purified polysaccharide vaccine. However, these differences remain scantly studied. Lymph node fine needle aspiration (FNA) has been recently described to study vaccine-induced germinal centre responses in depth and represents a promising tool to study the underlying immune mechanisms of pneumococcal vaccines. Insight into the underlying immune mechanisms of vaccines could improve future vaccine design, e.g. by refining dosing intervals.
Objective Determine timing of peak germinal centre B cell frequency following pneumococcal vaccination.
Main trial endpoints The main trial endpoint is represented by the frequency of germinal centre B cells (BGC) in lymph node aspirates at various time points after vaccination, as measured by spectral flow cytometry. Both total BGC cells and S. pneumoniae polysaccharide-specific BGC frequencies will be determined.
Trial design Pilot intervention study without a comparator.
Trial population Healthy individuals between the age of 20 - 40
Interventions Subjects will be vaccinated once with Prevenar13. FNA of the draining lymph node will be performed and blood will be drawn at baseline, followed by weekly collection during the first four weeks, every other week between weeks 4 - 8 and a final collection time point after 12 weeks, resulting in a total of 8 sampling time points over the course of three months. Draining lymph node size will be assessed by ultrasound every other day during the first two weeks and then alongside lymph node FNA for the remainder of the study.
Study Overview
Status
Conditions
Intervention / Treatment
Study Type
Enrollment (Estimated)
Phase
- Not Applicable
Contacts and Locations
Study Contact
- Name: Anna H Roukens, MD, PhD
- Phone Number: +31715262613
- Email: a.h.e.roukens@lumc.nl
Study Contact Backup
- Name: Leo G Visser, MD, PhD
- Phone Number: +31715262613
- Email: l.g.visser@lumc.nl
Study Locations
-
-
-
Leiden, Netherlands, 2333ZA
- Recruiting
- Leiden University Medical Center
-
Contact:
- Anna H Roukens, MD, PhD
- Phone Number: +31715262613
- Email: a.h.e.roukens@lumc.nl
-
Contact:
- Leo G Visser, MD, PhD
- Phone Number: +31715262613
- Email: l.g.visser@lumc.nl
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
- Adult
Accepts Healthy Volunteers
Description
Inclusion Criteria:
- Participants between the ages of 20 and 40 years old
- Participants should be generally healthy and without substantial co-morbidities, including all auto-immune diseases that are being actively treated with immunosuppressive therapy. Patients with chronic diseases that do not require immunosuppressive therapy and are stable, defined as not requiring change of therapy or hospitalization in the six weeks preceding study enrollment, might be eligible for this study.
Exclusion Criteria:
- BMI > 30 kg/m2
- Pregnancy at time of inclusion
- Breastfeeding during the course of the study
- Documented pneumococcal vaccination and/or infection
- Pneumococcal infection is defined as any infection that is microbiologically confirmed to be caused by S. pneumoniae (e.g. positive blood or sputum cultures for S. pneumoniae, positive urine S. pneumoniae antigen test)
- Documented HIV infection
- Documented primary immune disorder or primary coagulopathy
- Use of immunosuppressive medication or anticoagulants
- Known hypersensitivity to any of the vaccine components
- Recent (i.e. <4 weeks before inclusion) surgery in axillar area or major surgery elsewhere
- Vaccination with any vaccine < 1 month before inclusion
- Subjects vaccinated 1 - 6 months before enrolment can be included into the study. Study vaccine will be injected in the contralateral arm.
- Fever at time of inclusion
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Basic Science
- Allocation: N/A
- Interventional Model: Single Group Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: pneumococcal vaccination arm
the participants will receive a registered pneumococcal vaccine according to manufacturers instructions
|
vaccination with pneumococcal vaccine (PCV13)
Other Names:
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
peak germinal center B cell count
Time Frame: 3 months
|
frequency of germinal centre B cells (BGC) in lymph node aspirates will be measured at various time points after vaccination, as measured by spectral flow cytometry.
Lymph node sampling will take place every week for the first 4 weeks, than every other week until week 8. Characterization of the lymphocytes in the lymph node aspirate will be performed by flow cytometry
|
3 months
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
immune analysis of lymph node aspirates after pneumococcal vaccination
Time Frame: 3 months
|
In addition to evaluating the frequency of (antigen-specific) BGC cells (outcome 1), we will perform phenotyping of these cells.
Phenotyping includes measurement of activation markers, immunoglobulin class switching and markers associated with B cell differentiation.
|
3 months
|
Collaborators and Investigators
Sponsor
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Estimated)
Study Completion (Estimated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimated)
Study Record Updates
Last Update Posted (Estimated)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- U1111-1285-0005
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
IPD Plan Description
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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