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- W4220809745 abstract "T cells developed in the thymus play a key role in vaccine immunity. Thymectomy occurs during infant congenital heart surgery and results in an altered T cell distribution. We investigated if adults with congenital heart disease (ACHD) who underwent early thymectomy have a diminished response to influenza vaccination. Blood samples from ACHD with early thymectomy ≤1 year of age (ACHD-ET; n = 12), no thymectomy (ACHD-NT; n = 8), and healthy controls (HC; n = 14) were collected prior to and 4 weeks after influenza vaccination. Flow cytometric analysis of T cell subsets and vaccine-specific cytokine expressing CD4+ T cells as well as hemagglutination inhibition (HI) assays were completed. The mean age of the cohort was 34 ± 10.6 years and similar in all groups. The mean frequencies of naïve CD4+ and CD8+ T cells were lower in ACHD-ET than in HC (32.7% vs. 46.5%, p = 0.027 and 37.2% vs. 57.4%, p = 0.032, respectively). There was a rise in the frequency of memory CD4+ and CD8+ T cells in the ACHD-ET group. The ACHD-NT had no statistical difference from either group. The frequencies of influenza-specific memory CD4+ T cells expressing IFN-γ and TNF-α were increased after vaccination across all groups (p < 0.05). ACHD-ET have fewer naïve T cells, suggesting immunosenescence. Despite this, they show an adequate T Cell response to vaccination in young adulthood. Our findings support that routine vaccination is effective in this population, but research into older ACHD is necessary." @default.
- W4220809745 created "2022-04-03" @default.
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- W4220809745 date "2022-06-01" @default.
- W4220809745 modified "2023-09-27" @default.
- W4220809745 title "T cell response to influenza vaccination remains intact in adults with congenital heart disease who underwent early thymectomy" @default.
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- W4220809745 doi "https://doi.org/10.1016/j.ijcchd.2022.100359" @default.
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