Development of Monocytes, Macrophages, and Dendritic Cells

Development of Myeloid Immune Cells As leukocytes develop to maturity, they proceed through an array of phenotypically distinct intermediates. For T and B lymphocyte populations, the different developmental stages, anatomical locations, and cell signals required for progression are well established. However, until recently, much less has been known about how development proceeds in the myeloid lineage, which includes monocytes, macrophages, and dendritic cells. Geissmann et al. (p. 656 ) review our current understanding of myeloid lineage development and describe the developmental pathways and cues that drive differentiation.