In this issue of Developmental Cell, Lin et al. (2019) identify in zebrafish skin macrophage-like cells that sample the environment through transepithelial protrusions and import antigen from the water for traditional tissue-resident macrophages. Remarkably, these "metaphocytes" originate from the epidermis, challenging current assumptions about the lineage of tissue-resident macrophages.
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| http://dx.doi.org/10.1016/j.devcel.2019.05.006 | DOI Listing |
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