Adaptive Immune Response to Seasonal Influenza Vaccination (AIGI)

University Medicine Greifswald20 enrolled

Overview

AIGI (Adaptive Immune Response to Seasonal Influenza Vaccination) is a prospective clinical study aiming at studying the kinetics of vaccine-specific antibody production after seasonal influenza vaccination in health care workers.

AIGI (Adaptive Immune Response to Seasonal Influenza Vaccination) is a prospective clinical study aiming at elucidating the kinetics of vaccine-specific antibody production after seasonal Influenza vaccination in health care workers at the Greifswald University hospital. Participants were recruited before their intended vaccination. Participants received the influenza vaccine Vaxigrip Tetra 2020/2021 by Sanofi Pasteur Europe. Within the study, volunteers donate peripheral blood by venipuncture on the day of vaccination as well as 7 and 14 days after vaccination. EDTA plasma and peripheral mononuclear cells (PBMCs) are prepared and stored at -20 °C. Volunteers are also asked to complete a standardized questionnaire on each day of blood sampling. Questionnaires collect data about physical characteristics, seasonal influenza vaccinations, current infections, medication, immune relevant diseases and side effects of the vaccination.

Study Type

OBSERVATIONAL

Enrollment

Conditions

Seasonal Influenza Vaccination

Interventions

Vaxigrip Tetra 2020/2021DRUG

vaccine against seasonal influenza

Eligibility

Sex: ALLMin age: 18 Years

Medical Language ↔ Plain English

Inclusion Criteria: * Planned participation in seasonal influenza vaccination * Completion of the 18th year of life * verbal and written consent given Exclusion Criteria: * current infectious diseases * underweight (BMI\<18,5) * blood coagulation disorders, anemia or similar diseases * known congenital or acquired immunodeficiencies

Locations (1)

University Medicine Greifswald

Greifswald, Mecklenburg-Vorpommern, Germany

Outcomes

Primary Outcomes

mean current anti-influenza antibody production and cumulative antibody titer on the day of the vaccination

Serum antibody titers represent a cumulative measure of any preceded or recent immune responses. The current antibody production can be quantified using MENSA (medium enriched for newly synthesized antibodies), an approach that measures antibodies released from recently stimulated circulating antibody-secreting plasmablasts. For this purpose PBMCs are collected from the subject's whole blood sample, washed to remove serum antibodies, and then cultured for 7 days. Antibodies released ex vivo from the antibody-secreting plasmablasts can now be detected in the culture supernatant. These newly synthesized antibodies are a measure of the instantaneous antibody response. Sampling is conducted on the day of the vaccination.

Time frame: 1 day

mean current anti-influenza antibody production 7 days after the vaccination

Serum antibody titers represent a cumulative measure of any preceded or recent immune responses. The current antibody production can be quantified using MENSA (medium enriched for newly synthesized antibodies), an approach that measures antibodies released from recently stimulated circulating antibody-secreting plasmablasts. For this purpose, PBMCs are collected from the subject's whole blood sample, washed to remove serum antibodies, and then cultured for 7 days. Antibodies released ex vivo from the antibody-secreting plasmablasts can now be detected in the culture supernatant. These newly synthesized antibodies are a measure of the instantaneous antibody response. Sampling is conducted 7 days after the vaccination.

Time frame: 7 days after the vaccination

mean current anti-influenza antibody production 14 days after the vaccination

Serum antibody titers represent a cumulative measure of any preceded or recent immune responses. The current antibody production can be quantified using MENSA (medium enriched for newly synthesized antibodies), an approach that measures antibodies released from recently stimulated circulating antibody-secreting plasmablasts. For this purpose, PBMCs are collected from the subject's whole blood sample, washed to remove serum antibodies, and then cultured for 7 days. Antibodies released ex vivo from the antibody-secreting plasmablasts can now be detected in the culture supernatant. These newly synthesized antibodies are a measure of the instantaneous antibody response. Sampling is conducted 14 days after the vaccination.

Data from ClinicalTrials.gov

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