Journal
IMMUNOLOGIC RESEARCH
Volume 71, Issue 4, Pages 554-564Publisher
SPRINGER
DOI: 10.1007/s12026-023-09372-6
Keywords
Thymus; Tuft cells; Type 2 immunity; Thymic carcinoma; SARS-CoV-2
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The thymus is the central immune organ where T cells differentiate and mature, and it plays a crucial role in regulating the adaptive immune response. Tuft cells, as chemosensory cells, have been found in various tissues and show functions similar to cholinergic and immune cells. Thymic tuft cells, a newly discovered type of tuft cell, have been shown to participate in immune responses, tumorigenesis, and SARS-CoV-2 infection.
As the leading central immune organ, the thymus is where T cells differentiate and mature, and plays an essential regulatory role in the adaptive immune response. Tuft cells, as chemosensory cells, were first found in rat tracheal epithelial, later gradually confirmed to exist in various mucosal and non-mucosal tissues. Although tuft cells are epithelial-derived, because of their wide heterogeneity, they show functions similar to cholinergic and immune cells in addition to chemosensory ability. As newly discovered non-mucosal tuft cells, thymic tuft cells have been demonstrated to be involved in and play vital roles in immune responses such as antigen presentation, immune tolerance, and type 2 immunity. In addition to their unique functions in the thymus, thymic tuft cells have the characteristics of peripheral tuft cells, so they may also participate in the process of tumorigenesis and virus infection. Here, we review tuft cells' characteristics, distribution, and potential functions. More importantly, the potential role of thymic tuft cells in immune response, tumorigenesis, and severe acute respiratory syndrome coronavirus 2(SARS-CoV-2) infection was summarized and discussed.
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