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- W4313405920 abstract "Abstract The interaction between thymocytes and thymic epithelial cells (TEC) in the thymus is critical for the correct function and maturation of both cell populations and for the development of a diverse repertoire of non-self-reactive T-cell lymphocytes. Limited information is available on lympho-stromal crosstalk in the thymus of patients carrying thymic defects. We have previously shown that thymic tissues from DiGeorge syndrome (DGS) and Down syndrome (DS) patients have alterations in architecture and TEC composition, leading to altered T-cell development. Based on these results, we are performing single cell RNAseq (scRNAseq) to explore the transcriptional landscape of both stromal and hematopoietic components in the human thymus. Thanks to a collaboration with the pediatric cardiothoracic surgery center at the Children’s National Medical Center in Washington D.C., we have access to discarded thymic samples obtained from pediatric patients with partial DGS and DS, and from patients without immune defects. Preliminary results of scRNAseq analysis comparing tissues from normal donors and DS patients revealed a different distribution of cell subsets in both hematopoietic and stromal compartments, with several pathways differentially regulated, such as stress and metabolic processes. Additionally, we established a collaboration with the Thoracic and Gastrointestinal Malignancies Branch at the National Cancer Institute and are evaluating samples obtained from resected thymic epithelial tumors. Integration of data obtained from normal and diseased thymic tissue will provide novel insights into the function and development of the human thymus that could be helpful in the clinical management of patients with thymic defects. This research was supported by the Intramural Research Programs of the NIAID and the NCI (Center for Cancer Research), NIH" @default.
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- W4313405920 date "2022-05-01" @default.
- W4313405920 modified "2023-10-16" @default.
- W4313405920 title "Characterization of thymic epithelial cell and thymocyte function and development in patients with thymic defects using scRNAseq profiling" @default.
- W4313405920 doi "https://doi.org/10.4049/jimmunol.208.supp.159.02" @default.
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