The fibroblast: An emerging key player in thymic T cell selection.

Immunological Reviews
Takeshi NittaHiroshi Takayanagi

Abstract

Fibroblasts have recently attracted attention as a key stromal component that controls the immune responses in lymphoid tissues. The thymus has a unique microenvironment comprised of a variety of stromal cells, including fibroblasts and thymic epithelial cells (TECs), the latter of which is known to be important for T cell development because of their ability to express self-antigens. Thymic fibroblasts contribute to thymus organogenesis during embryogenesis and form the capsule and medullary reticular network in the adult thymus. However, the immunological significance of thymic fibroblasts has thus far only been poorly elucidated. In this review, we will summarize the current views on the development and functions of thymic fibroblasts as revealed by new technologies such as multicolor flow cytometry and single cell-based transcriptome profiling. Furthermore, the recently discovered role of medullary fibroblasts in the establishment of T cell tolerance by producing a unique set of self-antigens will be highlighted.

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Citations

Jul 6, 2021·Immunological Reviews·Anne L Fletcher, Shannon J Turley
Oct 24, 2021·International Immunology·Nanami MinoHiroshi Takayanagi

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