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Changes in Phenotypic and Molecular Features of Naïve and Central Memory T Helper Cell Subsets following SARS-CoV-2 Vaccination

by Roberts, David , Washington, Charlotte , Jennings, Aislinn , Griffiths, Alexandra , Smith, Peter , Millar, Jonathan , Estcourt, Lise J. , Fish, Matthew , Mora, Ana , Rynne, Jennifer , Singh, Shivani , Hopkins, Valerie , Harvala, Heli , Kaloyirou, Fotini , Shankar-Hari, Manu , Mosavie, Mia

in Adenoviruses / Analysis / Antibodies / Apoptosis / CD4 antigen / CD4+ T helper cell / Chromatin / Coronaviruses / COVID-19 / COVID-19 vaccines / DNA methylation / Epigenetics / Health aspects / Helper cells / Hypotheses / Immune response / Immunization / Immunological memory / Inflammasomes / Inflammation / Life sciences / Lymphocytes / Lymphocytes T / Memory cells / Plasma / RNA / SARS-CoV-2 / Severe acute respiratory syndrome / Severe acute respiratory syndrome coronavirus 2 / T cell receptors / T cells / Transcriptomics / Vaccination / Vaccines

2024

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Changes in Phenotypic and Molecular Features of Naïve and Central Memory T Helper Cell Subsets following SARS-CoV-2 Vaccination

2024

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Changes in Phenotypic and Molecular Features of Naïve and Central Memory T Helper Cell Subsets following SARS-CoV-2 Vaccination

2024

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Journal Article

Changes in Phenotypic and Molecular Features of Naïve and Central Memory T Helper Cell Subsets following SARS-CoV-2 Vaccination

Roberts, David,

Washington, Charlotte,

Jennings, Aislinn,

Griffiths, Alexandra,

Smith, Peter,

Millar, Jonathan,

Estcourt, Lise J.,

Fish, Matthew,

Mora, Ana,

Rynne, Jennifer,

Singh, Shivani,

Hopkins, Valerie,

Harvala, Heli,

Kaloyirou, Fotini,

Shankar-Hari, Manu,

Mosavie, Mia

2024

Overview

Molecular changes in lymphocytes following SARS-CoV-2 vaccination are incompletely understood. We hypothesized that studying the molecular (transcriptomic, epigenetic, and T cell receptor (TCR) repertoire) changes in CD4+ T cells following SARS-CoV-2 vaccination could inform protective mechanisms and refinement of future vaccines. We tested this hypothesis by reporting alterations in CD4+ T cell subsets and molecular features of CD4+ naïve and CD4+ central memory (CM) subsets between the unvaccinated and vaccinated groups. Compared with the unvaccinated, the vaccinated had higher HLA-DR expression in CD4+ T subsets, a greater number of differentially expressed genes (DEGs) that overlapped with key differentially accessible regions (DARs) along the chromatin linked to inflammasome activation, translation, regulation (of apoptosis, inflammation), and significant changes in clonal architecture beyond SARS-CoV-2 specificity. Several of these differences were more pronounced in the CD4+CM subset. Taken together, our observations imply that the COVID-19 vaccine exerts its protective effects via modulation of acute inflammation to SARS-CoV-2 challenge.

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