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Tissue-resident mast cells are associated with many inflammatory and physiological processes. Although mast cells arise from the yolk sac, the exact ontogeny of adult mast cells remains unclear. Here we have investigated the hematopoietic origin of mast cells using fate-mapping systems. We have shown that early erythro-myeloid progenitors (EMPs), late EMPs, and definitive hematopoietic stem cells (HSCs) each gave rise to mast cells in succession via an intermediate integrin β7+ progenitor. From late embryogenesis to adult, early EMP-derived mast cells were largely replaced by late EMP-derived cells in most connective tissues except adipose and pleural cavity. Thus, mast cells with distinct origin displayed tissue-location preferences: early EMP-derived cells were limited to adipose and pleural cavity and late EMP-derived cells dominated most connective tissues, while HSC-derived cells were a main group in mucosa. Therefore, embryonic origin shapes the heterogeneity of adult mast cells, with diverse functions in immunity and development.
Pubmed ID: 30332630 RIS Download
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Software for single-cell flow cytometry analysis. Its functions include management, display, manipulation, analysis and publication of the data stream produced by flow and mass cytometers.
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