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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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http://dx.doi.org/10.1007/s12026-023-09372-6 | DOI Listing |
Cell
September 2025
Department of Medicine, University of California, San Francisco, San Francisco, CA 94143, USA; Howard Hughes Medical Institute, Chevy Chase, MD 20815, USA. Electronic address:
Adaptation of intestinal helminths to vertebrates involved the evolution of strategies to attenuate host tissue damage to support parasite reproduction and dissemination of offspring to the environment. Helminths initiate the IL-25-mediated tuft cell-type 2 innate lymphoid cell (ILC2) circuit that enhances barrier protection of the host, although viable parasites can target and limit this pathway. We used IL-25 alone to create small intestinal adaptation, marked by anatomic and immunologic changes that persisted months after induction.
View Article and Find Full Text PDFCell Tissue Res
September 2025
Institute for Anatomy and Cell Biology, German Center for Lung Research, Excellence Cluster Cardio-Pulmonary Institute (CPI), Justus Liebig University Giessen, 35392, Giessen, Germany.
Previous studies identified a rare cell type in the mouse tracheal epithelium with immunoreactivity to the microvillus protein villin (Vil1), which persisted in mice lacking tuft cells due to deletion of the transcription factor Pou2f3. This study aimed to clarify the identity of this ill-defined cell type. Ultrastructurally, all cells with tightly packed microvilli observed in the tracheal epithelium of Pou2f3-mice contained basally located dense core vesicles, a characteristic feature of neuroendocrine cells (NEC).
View Article and Find Full Text PDFInt Immunopharmacol
August 2025
Department of Pharmacology, China Pharmaceutical University, 639 Longmian Avenue, Nanjing 211198, China. Electronic address:
Non-neuronal acetylcholine (NNACh) operates as a spatiotemporal autacoid, functionally uncoupled from neuronal vesicular exocytosis (VAChAT/VGCC-dependent). In the immune and circulatory systems, where cholinergic innervation is relatively sparse, immune and stromal cells synthesize and release ACh autonomously to enable local immunomodulation. This review outlines NNACh's autacoid behavior, including stimulus-triggered production by ChAT cells, spatially constrained signaling, and rapid enzymatic degradation across lymphoid organs, visceral organs and circulatory compartments.
View Article and Find Full Text PDFBiomedicines
August 2025
Department of General and Gastroenterological Surgery, Osaka Medical and Pharmaceutical University, Osaka 569-8686, Japan.
: Acinar-to-ductal metaplasia (ADM) refers to the dedifferentiation or transdifferentiation of pancreatic acinar cells. Recently, ADM has received considerable attention as a potential precursor of pancreatic tumours. Previous studies in mouse models identified tuft cells, chemosensory epithelial cells, in ADM and pancreatic intraepithelial neoplasia (PanIN), both considered precursor lesions of pancreatic ductal adenocarcinoma (PDAC), but not in PDAC.
View Article and Find Full Text PDFJ Cell Sci
August 2025
Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY, USA.
The thymus originates from the third pharyngeal pouch endoderm, which also gives rise to respiratory tract elements. Here, we examined intrathymic cystic structures, long considered remnants of organogenesis. Through sequential histology and ultrastructural imaging, we uncovered that these "cysts" are in fact continuous and structured epithelial networks embedded within the thymic parenchyma.
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