Mafb lineage tracing to distinguish macrophages from other immune lineages reveals dual identity of Langerhans cells

作者：Wu Xiaodi; Briseno Carlos G; Durai Vivek; Albring Joern C; Haldar Malay; Bagadia Prachi; Kim Ki Wook; Randolph Gwendalyn J; Murphy Theresa L; Murphy Kenneth M^*

来源：Journal of Experimental Medicine, 2016, 213(12): 2553-2565.

DOI：10.1084/jem.20160600

Current systems for conditional gene deletion within mouse macrophage lineages are limited by ectopic activity or low efficiency. In this study, we generated a Mafb-driven Cre strain to determine whether any dendritic cells (DCs) identified by Zbtb46-GFP expression originate from a Mafb-expressing population. Lineage tracing distinguished macrophages from classical DCs, neutrophils, and B cells in all organs examined. At steady state, Langerhans cells (LCs) were lineage traced but also expressed Zbtb46-GFP, a phenotype not observed in any other population. After exposure to house dust mite antigen, Zbtb46-negative CD64(+) inflammatory cells infiltrating the lung were substantially lineage traced, but Zbtb46-positive CD64(-) cells were not. These results provide new evidence for the unique identity of LCs and challenge the notion that some inflammatory cells are a population of monocyte-derived DCs.

• 出版日期2016-11