Murine GMP- and MDP-derived classical monocytes have distinct functions and fates [dataset 1]
Monocytes are ephemeral myeloid immune cells that arise from adult hematopoiesis and circulate in the blood. They comprise two main subsets, in mice defined as classical and non-classical monocytes (CM, NCM). Recent fate mapping and transcriptomic analyses revealed that CM themselves are heterogeneous. Here, we report surface markers that allow segregation of murine GMP- and MDP-derived CM, as well as their functional characterization, including fate definition following adoptive cell transfer. GMP-Mo and MDP- Mo gave equal rise to homeostatic CM progeny, such as blood NCM and gut macrophages; the cells however differentially seeded selected other tissues, including the dura mater and lung. Specifically, GMP-Mo and MDP-Mo gave rise to distinct interstitial lung macrophages, linking CM dichotomy to previously reported pulmonary macrophage heterogeneity. Collectively, we provide evidence for the existence of two functionally distinct CM subsets in the mouse, which differentially contribute to peripheral tissue macrophage populations in homeostasis and following challenge. Overall design: Bone marrow cells were isolated from femur of a 10 week-old C57BL6 female mouse. The cells were stained with antibody panel containing 174 oligo-conjugated antibodies