A Clinical Observational Study of SARS-CoV-2 Specific CD8 T-Cell Responses to COVID-19 Vaccines in Humans
NCT ID: NCT04852289
Last Updated: 2025-12-19
Study Results
The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.
Basic Information
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ACTIVE_NOT_RECRUITING
78 participants
OBSERVATIONAL
2021-04-20
2027-06-30
Brief Summary
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The immune response is how the body recognizes and defends itself against foreign and harmful substances. Researchers want to compare the immune responses between young and older healthy adults after they receive vaccine doses for COVID-19. This research may help to determine whether age impacts cell response to COVID-19 vaccines.
Objective:
To study the immune response of people who receive Pizer or Moderna COVID-19 vaccines.
Eligibility:
People aged 18 and older who have not had COVID-19 and who either plan to receive the first dose of a COVID-19 vaccine within the next month or have received at least the first of 2 doses of the vaccine within the last 6 months.
Design:
Participants will be screened by telephone.
Participants will not get the COVID-19 vaccine in this study. They must get it through a vaccine location.
Participants who have not yet been vaccinated will have 7 visits. The first 4 visits will occur in the first month before and after each vaccination. The last 3 visits will occur 6 months, 1 year, and 2 years after completed vaccination.
Participants who have received at least 1 of 2 doses of the COVID-19 vaccine within the last 6 months will have 3 visits. The first visit will occur within 6 months of receiving the first vaccine dose. The last 2 visits will occur 1 year and 2 years after the first vaccine dose.
At visits, participant will review their medical history. Their height, weight, and/or vital signs will be measured. They will give blood samples after fasting. They may give urine samples. They may have a nasal swab test for COVID-19.
Detailed Description
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This study is to identify SARS-CoV-2 S protein specific CD8 T cells in the blood of COVID-19 vaccinated participants. Pfizer and Moderna made vaccines will be used in this study. As both vaccines are mRNA-based encoding S protein of SARS-CoV-2 and require two doses, the CD8 T cell response is expected to be comparable. We will also measure general health factors using blood samples. By analyzing the frequency, differentiation, and expansion of these SARS-CoV-2 S protein specific CD8 T cells, we hope to shed light into the CD8 T cell response to COVID-19 vaccine and its change with age.
Objectives:
To determine the proportion of individuals who develop and maintain SARS-CoV-2 S protein specific CD8 T cells after vaccination as a proxy for cellular immunity to future SARS CoV-2 exposure, to determine if there are differences in CD8 T cell response to COVID-19 vaccines between young and older healthy adults, and the longevity of CD8 T cell response over a five year follow up.
Endpoints:
Primary Endpoint: Presence or absence of various SARS-CoV-2 S protein specific CD8 T cells in COVID-19 vaccine participants and their quantitative changes during and after the course of vaccination, and over a five year time.
Secondary Endpoint: Determining the effect of age (either prespecify age \>65 vs \<65 or explore as a continuous variable) and sex on presence of SARS-CoV-2 S protein specific CD8 T cells
Exploratory Endpoints:
1. Correlations between CD8 T cell responses in vitro and circulating SARS-CoV-2 specific antibodies
2. Plasma inflammatory cytokines and other biomarkers
Conditions
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Keywords
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Study Design
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COHORT
PROSPECTIVE
Study Groups
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>=65 Female
Older Females
No interventions assigned to this group
>=65 Male
Older Males
No interventions assigned to this group
18-64 Female
Young Females
No interventions assigned to this group
18-64 Male
Young Males
No interventions assigned to this group
Eligibility Criteria
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Inclusion Criteria
* Ability of subject to understand the study and stated willingness to comply with all study procedures and availability for the duration of the study.
* Male or female aged 18 years or older.
* Able to speak and read English.
* Willingness and ability to come to the NIH/National Institute on Aging Clinical Research Unit at MedStar Harbor Hospital or the NIH/NIA/Biomedical Research Center at Johns Hopkins Bayview campus in Baltimore for study procedures.
* No knowledge of having had SARS-CoV-2, the virus that causes COVID-19.
Exclusion Criteria
this study:
* Unable to verify identification of volunteer by state issued ID card, driver s license, or military ID. Participants earning greater than $600.00/year are issued a 1099 form, therefore, positive identification is required.
* Unable to provide informed consent.
* Current use of steroids, immunosuppressive medications, radiation therapy, or chemotherapy medications.
* Pregnancy.
In addition, eligible participants may not be immediately able to participate in the study but might be eligible at a later date. These include:
* Symptoms of a viral infection on visit 1 (defer until resolved).
* Medication: Volunteers taking the following medications would be deferred for 2 weeks after course has been completed and volunteer is feeling well: Antibiotics, antifungals, antimalarials, antivirals.
* Temporary steroids (tapers): Deferred for 72 hours after symptoms are resolved and prescription is completed if taken orally, intravenously, or intramuscular. No deferral if taken intranasal, inhaled, or for joint injection.
* Infection or Fever: Deferred until 2 weeks after antibiotics are completed and /or volunteer is feeling well.
* We wish to only select healthy confirmed COVID-19 negative patients. Therefore, those who may have a household member (co-habitant) who is newly diagnosed with COVID-19 or who has symptoms will be deferred for 14 days.
* Treatment with another investigational drug or other intervention within 14 days of visit 1 per the discretion of the Principal Investigator.
18 Years
99 Years
ALL
No
Sponsors
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National Institute on Aging (NIA)
NIH
Responsible Party
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Principal Investigators
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Nan-Ping P Weng, M.D.
Role: PRINCIPAL_INVESTIGATOR
National Institute on Aging (NIA)
Locations
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National Institute of Aging, Clinical Research Unit
Baltimore, Maryland, United States
NIH/NIA/Biomedical Research Center at Johns Hopkins Bayview campus
Baltimore, Maryland, United States
Countries
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Other Identifiers
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000383-AG
Identifier Type: -
Identifier Source: secondary_id
10000383
Identifier Type: -
Identifier Source: org_study_id