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2015 ; 42
(4
): 665-78
Nephropedia Template TP
gab.com Text
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English Wikipedia
C-Myb(+) erythro-myeloid progenitor-derived fetal monocytes give rise to adult
tissue-resident macrophages
#MMPMID25902481
Hoeffel G
; Chen J
; Lavin Y
; Low D
; Almeida FF
; See P
; Beaudin AE
; Lum J
; Low I
; Forsberg EC
; Poidinger M
; Zolezzi F
; Larbi A
; Ng LG
; Chan JK
; Greter M
; Becher B
; Samokhvalov IM
; Merad M
; Ginhoux F
Immunity
2015[Apr]; 42
(4
): 665-78
PMID25902481
show ga
Although classified as hematopoietic cells, tissue-resident macrophages (MFs)
arise from embryonic precursors that seed the tissues prior to birth to generate
a self-renewing population, which is maintained independently of adult
hematopoiesis. Here we reveal the identity of these embryonic precursors using an
in utero MF-depletion strategy and fate-mapping of yolk sac (YS) and fetal liver
(FL) hematopoiesis. We show that YS MFs are the main precursors of microglia,
while most other MFs derive from fetal monocytes (MOs). Both YS MFs and fetal MOs
arise from erythro-myeloid progenitors (EMPs) generated in the YS. In the YS,
EMPs gave rise to MFs without monocytic intermediates, while EMP seeding the FL
upon the establishment of blood circulation acquired c-Myb expression and gave
rise to fetal MOs that then seeded embryonic tissues and differentiated into MFs.
Thus, adult tissue-resident MFs established from hematopoietic stem
cell-independent embryonic precursors arise from two distinct developmental
programs.