Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\26441990
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Front+Immunol
2015 ; 6
(ä): 486
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Ontogeny of Tissue-Resident Macrophages
#MMPMID26441990
Hoeffel G
; Ginhoux F
Front Immunol
2015[]; 6
(ä): 486
PMID26441990
show ga
The origin of tissue-resident macrophages, crucial for homeostasis and immunity,
has remained controversial until recently. Originally described as part of the
mononuclear phagocyte system, macrophages were long thought to derive solely from
adult blood circulating monocytes. However, accumulating evidence now shows that
certain macrophage populations are in fact independent from monocyte and even
from adult bone marrow hematopoiesis. These tissue-resident macrophages derive
from sequential seeding of tissues by two precursors during embryonic
development. Primitive macrophages generated in the yolk sac (YS) from early
erythro-myeloid progenitors (EMPs), independently of the transcription factor
c-Myb and bypassing monocytic intermediates, first give rise to microglia. Later,
fetal monocytes, generated from c-Myb(+) EMPs that initially seed the fetal liver
(FL), then give rise to the majority of other adult macrophages. Thus,
hematopoietic stem cell-independent embryonic precursors transiently present in
the YS and the FL give rise to long-lasting self-renewing macrophage populations.