Long-lived self-renewing bone marrow-derived macrophages displace embryo-derived cells to inhabit adult serous cavities

Calum C. Bain, Catherine A Hawley, Hannah Garner, Charlotte L Scott, Anika Schridde, Nicholas Steers, Mathias Mack, Anagha Joshi, Martin Guilliams, Allan Mcl Mowat, Frederic Geissmann, Stephen J. Jenkins

Research output: Contribution to journalArticlepeer-review

Abstract

Peritoneal macrophages are one of the most studied macrophage populations in the body, yet the composition, developmental origin and mechanisms governing the maintenance of this compartment are controversial. Here we show resident F4/80hiGATA6+ macrophages are long-lived, undergo non-stochastic self-renewal and retain cells of embryonic origin for at least 4 months in mice. However, Ly6C+ monocytes constitutively enter the peritoneal cavity in a CCR2-dependent manner, where they mature into short-lived F4/80loMHCII+ cells that act, in part, as precursors of F4/80hiGATA6+ macrophages. Notably, monocyte-derived F4/80hi macrophages eventually displace the embryonic population with age in a process that is highly gender dependent and not due to proliferative exhaustion of the incumbent embryonic population, despite the greater proliferative activity of newly recruited cells. Furthermore, although monocyte-derived cells acquire key characteristics of the embryonic population, expression of Tim4 was impaired, leading to cumulative changes in the population with age.
Original languageEnglish
Article numberncomms11852
Number of pages14
JournalNature Communications
Volume7
DOIs
Publication statusPublished - 13 Jun 2016

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